UNITEDSTATES
SECURITIESANDEXCHANGECOMMISSION
Washington,D.C.20549

FORM N-CSRS

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT
INVESTMENT COMPANIES

Investment Company Act file number 811-21972

Name of Fund: BlackRock Credit Allocation Income Trust IV (BTZ)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Anne F. Ackerley, Chief Executive Officer, BlackRock
Credit Allocation Income Trust IV, 55 East 52 nd Street, New York, NY 10055.

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 10/31/2010

Date of reporting period: 04/30/2010

Item 1 – Report to Stockholders



Semi-Annual Report

APRIL 30, 2010 I (UNAUDITED)

BlackRock Credit Allocation Income Trust I, Inc. (PSW)

BlackRock Credit Allocation Income Trust II, Inc. (PSY)

BlackRock Credit Allocation Income Trust III (BPP)

BlackRock Credit Allocation Income Trust IV (BTZ)

BlackRock Floating Rate Income Trust (BGT)

NOT FDIC INSURED

MAY LOSE VALUE

NO BANK GUARANTEE


Table of Contents    
  Page  
Dear Shareholder   3  
Semi-Annual Report:    
Fund Summaries   4  
The Benefits and Risks of Leveraging   9  
Derivative Financial Instruments   10  
Financial Statements:    
    Schedules of Investments   11  
    Statements of Assets and Liabilities   38  
    Statements of Operations   39  
    Statements of Changes in Net Assets   40  
    Statement of Cash Flows   42  
Financial Highlights   44  
Notes to Financial Statements   48  
Officers and Directors   58  
Additional Information   59  

2 SEMI-ANNUAL REPORT

APRIL 30, 2010


Dear Shareholder

Although overall global economic and financial conditions have generally improved over the past year, the period ended with high levels of market volatility

and diminishing investor confidence sparked by the sovereign debt crisis in Europe, concerns over the strength of the economic recovery and uncertainty

surrounding the future of interest rate policies. Additionally, as the period drew to a close, the increasing likelihood of more stringent financial market regula-

tions added to the overall sense of investment uncertainty. Despite the uneven nature of recent market conditions, we continue to believe that the “Great

Recession” likely ended at some point last summer, thanks primarily to massive fiscal and monetary stimulus, and that the global economy remains in

recovery mode.

Global equity markets bottomed in early 2009 and since that time have moved unevenly higher as investors were lured back into the markets by depressed

valuations, desire for higher yields and improvements in corporate earnings prospects. There have been several corrections along the way and volatility levels

have remained elevated — reflections of mixed economic data, lingering deflation issues (especially in Europe) and uncertainty surrounding financial regula-

tions. On balance, however, improving corporate revenues and profits and a positive macro backdrop helped push stock prices higher over the last twelve

and six months. From a geographic perspective, US equities have outpaced their international counterparts in recent months, as the domestic economic

recovery has been more pronounced and as credit-related issues have held European markets down.

Within fixed income markets, yields have been moving unevenly as improving economic conditions have been acting to push Treasury yields higher (and

prices correspondingly lower), while concerns over ongoing deflation threats have acted as a counterweight. As the period drew to a close, Treasury yields

were falling as investors flocked to the “safe haven” asset class in the face of escalating uncertainty. Over the course of the last twelve and six months,

however, Treasuries underperformed other areas of the bond market, particularly the high yield sector, which has been benefiting from increased investor

demand. Meanwhile, municipal bonds slightly outperformed taxable sectors over both the six- and twelve-month periods thanks to continued high demand

levels, but have continued to face the headwinds of ongoing state and local budget problems. As in the taxable arena, high yield municipals have been out-

performing the rest of the market.

Regarding cash investments, yields on money market securities remain near all-time lows (producing returns only marginally above zero percent), with

the Federal Open Market Committee reiterating that economic circumstances are likely to necessitate an accommodative interest rate stance for an

“extended period.”

Against this backdrop, the major market averages posted the following returns:      
Total Returns as of April 30, 2010   6-month   12-month  
US equities (S&P 500 Index)   15.66%   38.84%  
Small cap US equities (Russell 2000 Index)   28.17   48.95  
International equities (MSCI Europe, Australasia, Far East Index)   2.48   34.43  
3-month Treasury bill (BofA Merrill Lynch 3-Month Treasury Bill Index)   0.04   0.15  
US Treasury securities (BofA Merrill Lynch 10-Year US Treasury Index)   (0.54)   (1.32)  
Taxable fixed income (Barclays Capital US Aggregate Bond Index)   2.54   8.30  
Tax-exempt fixed income (Barclays Capital Municipal Bond Index)   3.68   8.85  
High yield bonds (Barclays Capital US Corporate High Yield 2% Issuer Capped Index)   11.60   42.53  

Past performance is no guarantee of future results. Index performance shown for illustrative purposes only. You cannot invest directly in an index.

Global financial markets continue to show signs of improvement, but questions about the strength and sustainability of the recovery abound. Through

periods of uncertainty, as ever, BlackRock’s full resources are dedicated to the management of our clients’ assets. For additional market perspective and

investment insight, visit www.blackrock.com/shareholdermagazine , where you’ll find the most recent issue of our award-winning Shareholder® magazine,

as well as its quarterly companion newsletter, Shareholder Perspectives . As always, we thank you for entrusting BlackRock with your investments, and we

look forward to your continued partnership in the months and years ahead.


THIS PAGE NOT PART OF YOUR FUND REPORT

3


Fund Summary as of April 30, 2010

BlackRock Credit Allocation Income Trust I, Inc.

Investment Objective

BlackRock Credit Allocation Income Trust I, Inc. (PSW) (formerly BlackRock Preferred and Corporate Income Strategies Fund, Inc.) (the “Fund”) seeks to
provide shareholders with high current income and capital appreciation. The Fund seeks to achieve its objectives by investing primarily in credit-related securi-
ties, including, but not limited to, investment grade corporate bonds, high yield bonds, bank loans, preferred securities or convertible bonds or derivatives with
economic characteristics similar to these credit-related securities.

Effective November 13, 2009, BlackRock Preferred and Corporate Income Strategies Fund, Inc. was renamed BlackRock Credit Allocation Income Trust I, Inc.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended April 30, 2010, the Fund returned 17.86% based on market price and 16.40% based on net asset value (“NAV”). For the same
period, the closed-end Lipper Income & Preferred Stock Funds category posted an average return of 22.64% on a market price basis and 15.18% on a
NAV basis. All returns reflect reinvestment of dividends. The Fund’s discount to NAV, which narrowed during the period, accounts for the difference between
performance based on price and performance based on NAV. In accordance with a change to its investment policies the Fund transitioned its portfolio away
from primarily investing in preferred securities and corporate bonds into a broader spectrum of securities across the capital structure. Performance has been
driven by the strong rebound in preferred securities, along with asset allocation decisions within the preferred sector. In particular, the Fund benefited from
an overweight allocation to institutional corporate securities and hybrid securities as those sectors continued their dramatic outperformance versus $25 par
preferred securities, in which the Fund was underweight. The Fund’s performance also benefited from participation in several additional issuer-related ten-
ders in preferred equity exchanges, along with an overweight in the European banking sector. On the other hand, markets experienced substantial volatility
over the period, most notably during the first three months of 2010. Markets were robust in early January as improving economic conditions left investors
feeling underinvested and scrambling to purchase assets. The rally met an abrupt end in mid-January due to rising Greek default risk and the unexpected
tightening of monetary policy in China. Markets declined over the ensuing weeks until a European Union-led finance package for Greece was announced.
From that point, markets rallied on stronger economic data, including the first month of job creation (in March) and upward revisions to the previous three
months’ jobs data. The preferred market was largely immune from this volatility, however, as prices rose whether the broader market was rallying or selling
off. This was due to the previously discussed positive effect of market tenders in the European banking sector.
The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information      
  Symbol on New York Stock Exchange (“NYSE”)   PSW  
  Initial Offering Date   August 1, 2003  
  Yield based on Closing Market Price as of April 30, 2010 ($9.32) 1     7.73%  
  Current Monthly Distribution per Common Share 2   $0.06  
  Current Annualized Distribution per Common Share 2   $0.72  
  Leverage as of April 30, 2010 3   29%  

1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.
Past performance does not guarantee future results.
2 The monthly distribution per Common Share, declared on June 1, 2010, was decreased to $0.057. The yield on the Closing Market Price, Current
Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The
distribution rate is not constant and is subject to further change in the future. A portion of the distribution may be deemed a tax return of capital or
net realized gain.
3 Represents reverse repurchase agreements and Auction Market Preferred Shares (“Preferred Shares”) as a percentage of total managed assets,
which is the total assets of the Fund (including any assets attributable to any borrowings and Preferred Shares) minus the sum of liabilities (other
than borrowings representing financial leverage). For a discussion of leveraging techniques utilized by the Fund, please see The Benefits and Risks
of Leveraging on page 9.

The table below summarizes the changes in the Fund’s market price and NAV per share:

  4/30/10   10/31/09   Change   High   Low  
Market Price   $ 9.32   $8.24   13.11%   $ 9.40   $7.93  
Net Asset Value   $10.40   $9.31   11.71%   $10.40   $9.22  

The following charts show the portfolio composition and credit quality allocations of the Fund’s long-term investments:

Portfolio Composition      
  4/30/10   10/31/09  
Corporate Bonds   67%   18%  
Preferred Securities   32       82  
Taxable Municipal Bonds   1    

      Credit Quality Allocations 4      
  4/30/10   10/31/09  
AA/Aa   9%    
A   27   26%  
BBB/Baa   48   62  
BB/Ba   13   8  
B   1   2  
CCC/Caa   1    
Not Rated   1   2  

4 Using the higher of Standard & Poor’s (“S&P’s”) or Moody’s Investor
Service (“Moody’s”) ratings.

4 SEMI-ANNUAL REPORT

APRIL 30, 2010


Fund Summary as of April 30, 2010

BlackRock Credit Allocation Income Trust II, Inc.

Investment Objective

BlackRock Credit Allocation Income Trust II, Inc. (PSY) (formerly BlackRock Preferred Income Strategies Fund, Inc.) (the “Fund”) seeks to provide share-
holders with current income and capital appreciation. The Fund seeks to achieve its objectives by investing primarily in credit-related securities, including,
but not limited to, investment grade corporate bonds, high yield bonds, bank loans, preferred securities or convertible bonds or derivatives with economic
characteristics similar to these credit-related securities.

Effective November 13, 2009, BlackRock Preferred Income Strategies Fund, Inc. was renamed BlackRock Credit Allocation Income Trust II, Inc.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended April 30, 2010, the Fund returned 21.75% based on market price and 18.47% based on net asset value (NAV). For the same
period, the closed-end Lipper Income & Preferred Stock Funds category posted an average return of 22.64% on a market price basis and 15.18% on a
NAV basis. All returns reflect reinvestment of dividends. The Fund’s discount to NAV, which narrowed during the period, accounts for the difference between
performance based on price and performance based on NAV. In accordance with a change to its investment policies the Fund transitioned its portfolio away
from primarily investing in preferred securities into a broader spectrum of securities across the capital structure. Performance has been driven by the strong
rebound in preferred securities, along with asset allocation decisions within the sector. In particular, the Fund benefited from an overweight allocation to
institutional corporate securities and hybrid securities as those sectors continued their dramatic outperformance versus $25 par preferred securities, in
which the Fund was underweight. The Fund’s performance also benefited from participation in several additional issuer-related tenders in preferred equity
exchanges, along with an overweight in the European banking sector. On the other hand, markets experienced substantial volatility over the period, most
notably during the first three months of 2010. Markets were robust in early January as improving economic conditions left investors feeling underinvested
and scrambling to purchase assets. The rally met an abrupt end in mid-January due to rising Greek default risk and the unexpected tightening of monetary
policy in China. Markets declined over the ensuing weeks until a European Union-led finance package for Greece was announced. From that point, markets
rallied on stronger economic data, including the first month of job creation (in March) and upward revisions to the previous three months’ jobs data. The
preferred market was largely immune from this volatility, however, as prices rose whether the broader market was rallying or selling off. This was due to the
previously discussed positive effect of market tenders in the European banking sector.
The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information      
  Symbol on NYSE   PSY  
  Initial Offering Date   March 28, 2003  
  Yield on Closing Market Price as of April 30, 2010 ($10.35) 1   8.70%  
  Current Monthly Distribution per Common Share 2   $0.075  
  Current Annualized Distribution per Common Share 2   $0.900  
  Leverage as of April 30, 2010 3   28%  

1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.
Past performance does not guarantee future results.
2 The monthly distribution per Common Share, declared on June 1, 2010, was decreased to $0.0635. The yield on the Closing Market Price, Current
Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The distribu-
tion rate is not constant and is subject to further change in the future. A portion of the distribution may be deemed a tax return of capital or net
realized gain.
3 Represents reverse repurchase agreements and Preferred Shares as a percentage of total managed assets, which is the total assets of the Fund
(including any assets attributable to any borrowings and Preferred Shares) minus the sum of liabilities (other than borrowings representing financial
leverage). For a discussion of leveraging techniques utilized by the Fund, please see The Benefits and Risks of Leveraging on page 9.

The table below summarizes the changes in the Fund’s market price and NAV per share:

  4/30/10   10/31/09   Change   High   Low  
Market Price   $10.35   $ 8.90   16.29%   $10.49   $8.53  
Net Asset Value   $11.35   $10.03   13.16%   $11.35   $9.91  

The following charts show the portfolio composition and credit quality allocations of the Fund’s long-term investments:

Portfolio Composition      
  4/30/10   10/31/09  
Corporate Bonds   56%      3%  
Preferred Securities   43   97  
Taxable Municipal Bonds   1          

      Credit Quality Allocations 4      
  4/30/10   10/31/09  
AA/Aa   7%   1%  
A   26   26  
BBB/Baa   50   56  
BB/Ba   13   14  
B   2   3  
CCC/Caa   1    
Not Rated   1    
  4 Using the higher of S&P’s or Moody’s ratings.    

SEMI-ANNUAL REPORT

APRIL 30, 2010

5


Fund Summary as of April 30, 2010

BlackRock Credit Allocation Income Trust III

Investment Objective

BlackRock Credit Allocation Income Trust III (BPP) (formerly BlackRock Preferred Opportunity Trust) (the “Fund”) seeks high current income consistent
with capital preservation. The Fund seeks to achieve its objectives by investing primarily in credit-related securities, including, but not limited to, investment
grade corporate bonds, high yield bonds, bank loans, preferred securities or convertible bonds or derivatives with economic characteristics similar to these
credit-related securities.

Effective November 13, 2009, BlackRock Preferred Opportunity Trust was renamed BlackRock Credit Allocation Income Trust III.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended April 30, 2010, the Fund returned 13.05% based on market price and 12.74% based on net asset value (NAV). For the same
period, the closed-end Lipper Income & Preferred Stock Funds category posted an average return of 22.64% on a market price basis and 15.18% on a
NAV basis. All returns reflect reinvestment of dividends. The Fund’s discount to NAV, which narrowed during the period, accounts for the difference between
performance based on price and performance based on NAV. In accordance with a change to its investment policies the Fund transitioned its portfolio away
from primarily investing in preferred securities into a broader spectrum of securities across the capital structure. Performance has been driven by the strong
rebound in preferred securities, along with asset allocation decisions within the preferred sector. In particular, the Fund benefited from an overweight alloca-
tion to institutional corporate securities and hybrid securities as those sectors continued their dramatic outperformance versus $25 par preferred securities,
in which the Fund was underweight. The Fund’s performance also benefited from participation in several additional issuer-related tenders in preferred equity
exchanges, along with an overweight in the European banking sector. On the other hand, markets experienced substantial volatility over the period, most
notably during the first three months of 2010. Markets were robust in early January as improving economic conditions left investors feeling underinvested
and scrambling to purchase assets. The rally met an abrupt end in mid-January due to rising Greek default risk and the unexpected tightening of monetary
policy in China. Markets declined over the ensuing weeks until a European Union-led finance package for Greece was announced. From that point, markets
rallied on stronger economic data, including the first month of job creation (in March) and upward revisions to the previous three months’ jobs data. The
preferred market was largely immune from this volatility, however, as prices rose whether the broader market was rallying or selling off. This was due to the
previously discussed positive effect of market tenders in the European banking sector.
The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information      
  Symbol on NYSE   BPP  
  Initial Offering Date   February 28, 2003  
  Yield on Closing Market Price as of April 30, 2010 ($10.78) 1   8.07%  
  Current Monthly Distribution per Common Share 2   $0.0725  
  Current Annualized Distribution per Common Share 2   $0.8700  
  Leverage as of April 30, 2010 3   24%  

1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.
Past performance does not guarantee future results.
2 The monthly distribution per Common Share, declared on June 1, 2010, was decreased to $0.066500. The yield on the Closing Market Price, Current
Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The distribu-
tion rate is not constant and is subject to further change in the future. A portion of the distribution may be deemed a tax return of capital or net
realized gain.
3 Represents reverse repurchase agreements and Preferred Shares as a percentage of total managed assets, which is the total assets of the Fund
(including any assets attributable to any borrowings and Preferred Shares) minus the sum of liabilities (other than borrowings representing financial
leverage). For a discussion of leveraging techniques utilized by the Fund, please see The Benefits and Risks of Leveraging on page 9.

The table below summarizes the changes in the Fund’s market price and NAV per share:

  4/30/10   10/31/09   Change   High   Low  
Market Price   $10.78   $ 9.94   8.45%   $10.85   $ 9.56  
Net Asset Value   $11.95   $11.05   8.14%   $11.95   $10.92  

The following charts show the portfolio composition and credit quality allocations of the Fund’s long-term investments:

      Portfolio Composition      
  4/30/10   10/31/09  
Corporate Bonds   58%   10%  
Preferred Securities   40   90  
Municipal Bonds   2    

      Credit Quality Allocations 4      
  4/30/10   10/31/09  
AA/Aa   7%   4%  
A   32   28  
BBB/Baa   40   45  
BB/Ba   18   13  
B   2   5  
CCC/Caa   1   5  
  4 Using the higher of S&P’s or Moody’s ratings.    

6 SEMI-ANNUAL REPORT

APRIL 30, 2010


Fund Summary as of April 30, 2010

BlackRock Credit Allocation Income Trust IV

Investment Objective

BlackRock Credit Allocation Income Trust IV (BTZ) (formerly BlackRock Preferred and Equity Advantage Trust) (the “Fund”) seeks to achieve high
current income, current gains and capital appreciation. The Fund seeks to achieve its objectives by investing primarily in credit-related securities, including,
but not limited to, investment grade corporate bonds, high yield bonds, bank loans, preferred securities or convertible bonds or derivatives with economic char-
acteristics similar to these credit-related securities.

Effective November 13, 2009, BlackRock Preferred and Equity Advantage Trust was renamed BlackRock Credit Allocation Income Trust IV.
No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended April 30, 2010, the Fund returned 20.86% based on market price and 16.29% based on net asset value (NAV). For the same
period, the closed-end Lipper Income & Preferred Stock Funds category posted an average return of 22.64% on a market price basis and 15.18% on a
NAV basis. All returns reflect reinvestment of dividends. The Fund’s discount to NAV, which narrowed during the period, accounts for the difference between
performance based on price and performance based on NAV. In accordance with a change to its investment policies the Fund transitioned its portfolio away
from primarily investing in preferred and equity securities into a broader spectrum of securities across the capital structure. In addition, the Fund no longer
employs an option-writing strategy. Performance has been driven by the strong rebound in preferred securities, along with asset allocation decisions within
the preferred sector. In particular, the Fund benefited from an overweight allocation to institutional corporate securities and hybrid securities as those sec-
tors continued their dramatic outperformance versus $25 par preferred securities, in which the Fund was underweight. The Fund’s performance also bene-
fited from participation in several additional issuer-related tenders in preferred equity exchanges, along with an overweight in the European banking sector.
On the other hand, markets experienced substantial volatility over the period, most notably during the first three months of 2010. Markets were robust in
early January as improving economic conditions left investors feeling underinvested and scrambling to purchase assets. The rally met an abrupt end in mid-
January due to rising Greek default risk and the unexpected tightening of monetary policy in China. Markets declined over the ensuing weeks until a
European Union-led finance package for Greece was announced. From that point, markets rallied on stronger economic data, including the first month of
job creation (in March) and upward revisions to the previous three months’ jobs data. The preferred market was largely immune from this volatility, however,
as prices rose whether the broader market was rallying or selling off. This was due to the previously discussed positive effect of market tenders in the
European banking sector.
The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information      
  Symbol on NYSE   BTZ  
  Initial Offering Date   December 27, 2006  
  Yield on Closing Market Price as of April 30, 2010 ($12.59) 1   9.53%  
  Current Monthly Distribution per Common Share 2   $0.10  
  Current Annualized Distribution per Common Share 2   $1.20  
  Leverage as of April 30, 2010 3   29%  

1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.
Past performance does not guarantee future results.
2 The monthly distribution per Common Share, declared on June 1, 2010, was decreased to $0.079. The yield on the Closing Market Price, Current
Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The distribu-
tion rate is not constant and is subject to further change in the future. A portion of the distribution may be deemed a tax return of capital or net
realized gain.
3 Represents reverse repurchase agreements and Preferred Shares as a percentage of total managed assets, which is the total assets of the Fund
(including any assets attributable to any borrowings and Preferred Shares) minus the sum of liabilities (other than borrowings representing financial
leverage). For a discussion of leveraging techniques utilized by the Fund, please see The Benefits and Risks of Leveraging on page 9.

The table below summarizes the changes in the Fund’s market price and NAV per share:

  4/30/10   10/31/09   Change   High   Low  
Market Price   $12.59   $10.96   14.87%   $12.65   $10.66  
Net Asset Value   $13.97   $12.64   10.52%   $13.97   $12.55  

The following charts show the portfolio composition of the Fund’s long-term investments and credit quality allocations of the Fund’s
long-term investments excluding Common Stocks:

Portfolio Composition      
  4/30/10   10/31/09  
Corporate Bonds   51%   6%  
Preferred Securities   38   84  
U.S. Treasury Obligations   8    
Taxable Municipal Bonds   2    
Common Stocks   1   10  

      Credit Quality Allocations 4      
  4/30/10   10/31/09  
AA/Aa   7%   4%  
A   31   33  
BBB/Baa   40   53  
BB/Ba   11   6  
B   2   4  
CCC/Caa   1    
Not Rated   8    
  4 Using the higher of S&P’s or Moody’s ratings.    

SEMI-ANNUAL REPORT

APRIL 30, 2010

7


Fund Summary as of April 30, 2010

BlackRock Floating Rate Income Trust

Investment Objective

BlackRock Floating Rate Income Trust (BGT) seeks to provide a high level of current income and to seek the preservation of capital. The Fund seeks to
achieve its objective by investing in a global portfolio of primarily floating and variable rate securities.

No assurance can be given that the Fund’s investment objective will be achieved.

Performance

For the six months ended April 30, 2010, the Fund returned 22.72% based on market price and 10.90% based on net asset value (NAV). For the same
period, the closed-end Lipper Loan Participation Funds category posted an average return of 29.63% on a market price basis and 11.27% on a NAV basis. All
returns reflect reinvestment of dividends. (The performance of the Lipper category does not necessarily correlate to that of the Fund, as the Lipper group com-
prises both closed-end funds that employ leverage and continuously offered closed-end funds that do not. For this reporting period, those Lipper peers that do
not employ leverage were at a disadvantage given the market rally.) The Fund moved from a discount to NAV to a premium by period-end, which accounts for
the difference between performance based on price and performance based on NAV. The Fund's use of leverage produced positive absolute performance but
accounted for the Fund’s underperformance versus its Lipper category, as many of the funds in the category employ higher levels of leverage. Conversely, the
Fund’s allocation to high yield bonds outperformed bank loans during the period and added to performance. Relative to its Lipper peers, the Fund continues to
focus on higher-quality sectors and structures, which underperformed in the market rally that favored riskier assets.

The views expressed reflect the opinions of BlackRock as of the date of this report and are subject to change based on changes in market, economic or other conditions. These
views are not intended to be a forecast of future events and are no guarantee of future results.

Fund Information      
  Symbol on NYSE   BGT  
  Initial Offering Date   August 30, 2004  
  Yield on Closing Market Price as of April 30, 2010 ($15.00) 1   5.40%  
  Current Monthly Distribution per Common Share 2   $0.0675  
  Current Annualized Distribution per Common Share 2   $0.8100  
  Leverage as of April 30, 2010   22%  

1 Yield on closing market price is calculated by dividing the current annualized distribution per share by the closing market price.
Past performance does not guarantee future results.
2 The monthly distribution per Common Share, declared on June 1, 2010, was increased to $0.07. The yield on the Closing Market Price, Current
Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The distri-
bution rate is not constant and is subject to further change in the future. A portion of the distribution may be deemed a tax return of capital or net
realized gain.
3 Represents loan outstanding and Preferred Shares as a percentage of total managed assets, which is the total assets of the Fund (including any
assets attributable to any borrowings and Preferred Shares) minus the sum of liabilities (other than borrowings representing financial leverage).
For a discussion of leveraging techniques utilized by the Fund, please see The Benefits and Risks of Leveraging on page 9.

The table below summarizes the changes in the Fund’s market price and NAV per share:

  4/30/10   10/31/09   Change   High   Low  
Market Price   $15.00   $12.58   19.24%   $15.93   $12.55  
Net Asset Value   $14.32   $13.29   7.75%   $14.32   $13.20  

The following charts show the portfolio composition of the Fund’s long-term investments and credit quality allocations of the
Fund’s long-term investments excluding Common Stocks and Floating Rate Loan Interests:

Portfolio Composition      
  4/30/10   10/31/09  
Floating Rate Loan Interests   76%   76%  
Corporate Bonds   17   20  
Foreign Government Obligations   6   3  
Other Interests   1   1  

      Credit Quality Allocations 4      
  4/30/10   10/31/09  
AAA/Aaa     16%  
A   5%   4  
BBB/Baa   23   27  
BB/Ba   28   17  
B   27   22  
CCC/Caa   2   6  
C     5  
D     1  
Not Rated   15 5   2  

4 Using the higher of S&P’s or Moody’s ratings.
5 The investment advisor has deemed certain of these non-rated securi-
ties to be of investment grade quality. As of April 30, 2010, the mar-
ket value of these securities was $6,503,550 representing 6% of the
Fund’s long-term investments.

8 SEMI-ANNUAL REPORT

APRIL 30, 2010


The Benefits and Risks of Leveraging

The Funds may utilize leverage to seek to enhance the yield and NAV of their
Common Shares. However, these objectives cannot be achieved in all interest
rate environments.

The Funds may utilize leverage through borrowings, including by entering
into reverse repurchase agreements, or through the issuance of Preferred
Shares. In general, the concept of leveraging is based on the premise that
the cost of assets to be obtained from leverage will be based on short-
term interest rates, which normally will be lower than the income earned
by each Fund on its longer-term portfolio investments. To the extent that
the total assets of each Fund (including the assets obtained from leverage)
are invested in higher-yielding portfolio investments, each Fund’s Common
Shareholders will benefit from the incremental net income.

The interest earned on securities purchased with the proceeds from lever-
age is paid to Common Shareholders in the form of dividends, and the
value of these portfolio holdings is reflected in the per share NAV of each
Fund’s Common Shares. However, in order to benefit Common Shareholders,
the yield curve must be positively sloped; that is, short-term interest rates
must be lower than long-term interest rates. If the yield curve becomes
negatively sloped, meaning short-term interest rates exceed long-term
interest rates, income to Common Shareholders will be lower than if the
Funds had not used leverage.

To illustrate these concepts, assume a Fund’s Common Shares capitalization
is $100 million and it borrows and/or issues Preferred Shares for an addi-
tional $50 million, creating a total value of $150 million available for invest-
ment in long-term securities. If prevailing short-term interest rates are 3%
and long-term interest rates are 6%, the yield curve has a strongly positive
slope. In this case, the Fund pays interest expense and/or dividends on
the $50 million of Preferred Shares based on the lower short-term interest
rates. At the same time, the securities purchased by the Fund with assets
received from the borrowings and/or issuance of Preferred Shares can earn
income based on long-term interest rates. In this case, the interest expense
and/or dividends paid to Preferred Shareholders are significantly lower
than the income earned on the Fund’s long-term investments, and there-
fore the Common Shareholders are the beneficiaries of the incremental
net income.

If short-term interest rates rise, narrowing the differential between short-
term and long-term interest rates, the incremental net income pickup on
the Common Shares will be reduced or eliminated completely. Furthermore,
if prevailing short-term interest rates rise above long-term interest rates of
6%, the yield curve has a negative slope. In this case, the Fund pays divi-
dends on the higher short-term interest rates whereas the Fund’s total port-
folio earns income based on lower long-term interest rates.

Furthermore, the value of a Fund’s portfolio investments generally varies
inversely with the direction of long-term interest rates, although other factors
can influence the value of portfolio investments. In contrast, the redemption
value of the Funds’ borrowings and/or Preferred Shares does not fluctuate
in relation to interest rates. As a result, changes in interest rates can influ-
ence the Funds’ NAV positively or negatively in addition to the impact on
Fund performance from leverage from borrowings.

The use of leverage may enhance opportunities for increased income to the
Funds and Common Shareholders, but as described above, it also creates
risks as short- or long-term interest rates fluctuate. Leverage also will gener-
ally cause greater changes to each Fund’s NAV, market price and dividend
rates than a comparable portfolio without leverage. If the income derived
from securities purchased with assets received from leverage exceeds the
cost of leverage, each Fund’s net income will be greater than if leverage had
not been used. Conversely, if the income from the securities purchased is
not sufficient to cover the cost of leverage, each Fund’s net income will be
less than if leverage had not been used, and therefore the amount available
for distribution to shareholders will be reduced. Each Fund may be required
to sell portfolio securities at inopportune times or at distressed values in
order to comply with regulatory requirements applicable to the use of lever-
age or as required by the terms of leverage instruments which may cause
a Fund to incur losses. The use of leverage may limit each Fund’s ability to
invest in certain types of securities or use certain types of hedging strate-
gies, such as in the case of certain restrictions imposed by ratings agencies
that rate Preferred Shares issued by each Fund. Each Fund will incur
expenses in connection with the use of leverage, all of which are borne by
the Common Shareholders and may reduce income on the Common Shares.

Under the Investment Company Act of 1940, BGT is permitted to borrow
through a credit facility up to 33 1 / 3 % of its total managed assets and the
Funds are permitted to issue Preferred Shares in an amount of up to 50%
of their total managed assets at the time of issuance. Under normal cir-
cumstances, each Fund anticipates that the total economic leverage from
Preferred Shares, reverse repurchase agreements and credit facility borrow-
ings will not exceed 50% of its total managed assets at the time such lever-
age is incurred. As of April 30, 2010, the Funds had economic leverage from
Preferred Shares, reverse repurchase agreements and/or credit facility bor-
rowings as a percentage of their total managed assets as follows:

  Percent of  
  Leverage  
PSW   29%  
PSY   28%  
BPP   24%  
BTZ   29%  
BGT   22%  

SEMI-ANNUAL REPORT

APRIL 30, 2010

9


Derivative Financial Instruments

The Funds may invest in various derivative instruments, including financial
futures contracts, swaps, foreign currency exchange contracts and options,
as specified in Note 2 of the Notes to Financial Statements, which consti-
tute forms of economic leverage. Such instruments are used to obtain
exposure to a market without owning or taking physical custody of securi-
ties or to hedge market, equity, credit, interest rate and/or foreign currency
exchange rate risks. Such derivative instruments involve risks, including the
imperfect correlation between the value of a derivative instrument and the
underlying asset, possible default of the counterparty to the transaction
and illiquidity of the derivative instrument. Each Fund’s ability to success-

fully use a derivative instrument depends on the investment advisor’s
ability to accurately predict pertinent market movements, which cannot be
assured. The use of derivative instruments may result in losses greater than
if they had not been used, may require the Funds to sell or purchase port-
folio securities at inopportune times or at distressed values, may limit the
amount of appreciation the Funds can realize on an investment or may
cause the Funds to hold a security that they might otherwise sell. The
Funds’ investments in these instruments are discussed in detail in the
Notes to Financial Statements.

10 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments April 30, 2010 (Unaudited)

BlackRock Credit Allocation Income Trust I, Inc. (PSW)

(Percentages shown are based on Net Assets)

  Par    
Corporate Bonds   (000)             Value  
Aerospace & Defense — 3.7%      
BE Aerospace, Inc., 8.50%, 7/01/18   $ 560   $ 599,200  
Bombardier, Inc., 7.75%, 3/15/20 (a)   720   765,000  
United Technologies Corp., 5.70%, 4/15/40   2,500   2,610,327  
    3,974,527  
Airlines — 0.4%      
Continental Airlines Pass-Through Certificates,      
Series 2009-2, Class B, 9.25%, 5/10/17   375   401,250  
Auto Components — 0.6%      
Icahn Enterprises LP (a):      
      7.75%, 1/15/16   200   194,500  
      8.00%, 1/15/18   500   486,250  
    680,750  
Beverages — 0.4%      
Constellation Brands, Inc., 7.25%, 5/15/17   460   469,200  
Capital Markets — 1.7%      
Ameriprise Financial, Inc., 5.30%, 3/15/20   750   780,626  
Morgan Stanley, 7.30%, 5/13/19   900   988,270  
    1,768,896  
Chemicals — 0.2%      
CF Industries, Inc., 7.13%, 5/01/20   250   263,125  
Commercial Services & Supplies — 2.6%      
Browning-Ferris Industries, Inc., 7.40%, 9/15/35   865   987,136  
Corrections Corp. of America, 7.75%, 6/01/17   775   821,500  
Waste Management, Inc., 6.13%, 11/30/39   900   937,159  
    2,745,795  
Communications Equipment — 0.7%      
Brocade Communications Systems, Inc.,      
6.88%, 1/15/20 (a)   700   722,750  
Consumer Finance — 5.2%      
American Express Co., 8.13%, 5/20/19   925   1,132,932  
Capital One Bank USA NA, 8.80%, 7/15/19   775   950,341  
Inmarsat Finance Plc, 7.38%, 12/01/17 (a)   520   542,100  
SLM Corp., 4.00%, 7/25/14 (b)   3,200   2,979,168  
    5,604,541  
Containers & Packaging — 1.0%      
Ball Corp.:      
      7.13%, 9/01/16   400   425,000  
      6.75%, 9/15/20   405   414,113  
Bemis Co., Inc., 6.80%, 8/01/19   200   227,786  
    1,066,899  
Diversified Financial Services — 2.5%      
Bank of America Corp., 7.63%, 6/01/19   1,575   1,797,891  
GMAC, Inc., 8.30%, 2/12/15 (a)   800   835,000  
    2,632,891  
Diversified Telecommunication Services — 3.7%      
AT&T, Inc., 6.30%, 1/15/38   1,000   1,038,919  
New Communications Holdings, Inc.,      
8.50%, 4/15/20 (a)   700   721,000  
Qwest Corp., 8.38%, 5/01/16   390   444,600  
Verizon Communications, Inc., 7.35%, 4/01/39   925   1,098,394  
Windstream Corp.:      
      8.63%, 8/01/16   250   255,938  
      7.88%, 11/01/17   400   397,000  
    3,955,851  

  Par    
Corporate Bonds   (000)             Value  
Electric Utilities — 1.7%      
Progress Energy Inc., 7.00%, 10/30/31   $ 1,000   $ 1,142,424  
Southern California Edison Co., 5.50%, 3/15/40   650   661,578  
    1,804,002  
Food & Staples Retailing — 3.9%      
CVS Caremark Corp., 6.30%, 6/01/62 (b)   1,500   1,447,500  
Wal-Mart Stores, Inc., 6.20%, 4/15/38   2,500   2,752,035  
    4,199,535  
Food Products — 0.8%      
Kraft Foods, Inc.:      
      6.50%, 8/11/17   385   436,215  
      6.13%, 8/23/18   390   430,336  
    866,551  
Gas Utilities — 0.9%      
Nisource Finance Corp., 6.13%, 3/01/22   900   955,581  
Health Care Equipment & Supplies — 1.7%      
Medtronic, Inc., 5.55%, 3/15/40   1,765   1,822,583  
Health Care Providers & Services — 2.4%      
Aetna, Inc., 6.75%, 12/15/37   800   881,674  
HCA, Inc./DE, 8.50%, 4/15/19 (a)   400   439,500  
Tenet Healthcare Corp., 10.00%, 5/01/18 (a)   350   398,563  
UnitedHealth Group, Inc., 6.88%, 2/15/38   800   878,953  
    2,598,690  
Insurance — 4.9%      
Lincoln National Corp.:      
      8.75%, 7/01/19   400   498,973  
      6.25%, 2/15/20   800   855,095  
Northwestern Mutual Life Insurance,      
6.06%, 3/30/40 (a)   900   929,587  
Principal Financial Group, Inc., 8.88%, 5/15/19   225   277,550  
Prudential Financial, Inc., 6.63%, 12/01/37   800   881,974  
QBE Insurance Group Ltd., 9.75%, 3/14/14 (a)   1,484   1,807,461  
    5,250,640  
Life Sciences Tools & Services — 1.8%      
Bio-Rad Laboratories, Inc., 8.00%, 9/15/16   865   923,387  
Life Technologies Corp., 6.00%, 3/01/20   1,000   1,052,160  
    1,975,547  
Machinery — 1.5%      
Ingersoll-Rand Global Holding Co., Ltd.,      
9.50%, 4/15/14   800   980,878  
Navistar International Corp., 8.25%, 11/01/21   600   633,000  
    1,613,878  
Media — 19.3%      
CSC Holdings, Inc., 8.63%, 2/15/19 (a)   275   300,438  
CSC Holdings LLC, 8.50%, 6/15/15 (a)   400   426,000  
Comcast Corp., 6.30%, 11/15/17   800   886,715  
Cox Communications, Inc., 8.38%, 3/01/39 (a)   10,800   14,023,940  
DISH DBS Corp.:      
      7.00%, 10/01/13   450   465,750  
      7.88%, 9/01/19   250   262,500  
Intelsat Corp., 9.25%, 6/15/16   350   369,250  
News America, Inc., 6.15%, 3/01/37   950   972,633  
Time Warner Cable, Inc., 6.75%, 6/15/39   925   999,820  
Time Warner, Inc., 7.70%, 5/01/32   950   1,114,834  
UPC Germany GmbH, 8.13%, 12/01/17 (a)   240   244,800  
Virgin Media Secured Finance Plc, 6.50%, 1/15/18 (a)   600   603,000  
    20,669,680  

      Portfolio Abbreviations          
To simplify the listings of portfolio holdings in the Schedules of   EUR   Euro   GO   General Obligation Bonds  
Investments, the names of many of the securities have been   FKA   Formerly Known As   RB   Revenue Bonds  
abbreviated according to the following list:   GBP   British Pound   USD   US Dollar  
See Notes to Financial Statements.          

SEMI-ANNUAL REPORT

APRIL 30, 2010

11


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust I, Inc. (PSW)

(Percentages shown are based on Net Assets)

  Par    
Corporate Bonds   (000)             Value  
Metals & Mining — 1.2%      
Phelps Dodge Corp., 7.13%, 11/01/27   $ 700   $ 724,585  
Teck Resources Ltd., 10.75%, 5/15/19   400   498,000  
United States Steel Corp., 7.38%, 4/01/20   75   77,062  
    1,299,647  
Multi-Utilities — 1.5%      
CenterPoint Energy, Inc.:      
      5.95%, 2/01/17   750   789,789  
      6.50%, 5/01/18   775   844,879  
    1,634,668  
Multiline Retail — 0.8%      
Dollar General Corp., 10.63%, 7/15/15   750   833,438  
Oil, Gas & Consumable Fuels — 3.7%      
Enbridge Energy Partners LP, 9.88%, 3/01/19   475   628,835  
Enterprise Products Operating LLC, 6.65%, 4/15/18   1,000   1,139,448  
Kinder Morgan Energy Partners LP, 6.85%, 2/15/20   1,000   1,151,640  
ONEOK Partners LP, 8.63%, 3/01/19   800   1,004,031  
    3,923,954  
Paper & Forest Products — 2.5%      
Georgia-Pacific LLC, 8.25%, 5/01/16 (a)   785   859,575  
International Paper Co.:      
      7.50%, 8/15/21   775   910,322  
      7.30%, 11/15/39   800   886,953  
    2,656,850  
Pharmaceuticals — 11.5%      
Abbott Laboratories:      
      6.15%, 11/30/37   235   262,297  
      6.00%, 4/01/39   1,177   1,296,250  
Bristol-Myers Squibb Co.:      
      5.88%, 11/15/36   2,014   2,127,447  
      6.13%, 5/01/38   588   641,962  
Eli Lilly & Co., 5.95%, 11/15/37   588   639,820  
GlaxoSmithKline Capital, Inc., 6.38%, 5/15/38   1,690   1,913,246  
Merck & Co., Inc., 6.50%, 12/01/33   475   549,138  
Pfizer, Inc., 7.20%, 3/15/39   2,500   3,102,572  
Schering-Plough Corp., 6.55%, 9/15/37   1,504   1,754,663  
    12,287,395  
Real Estate Investment Trusts (REITs) — 3.1%      
AvalonBay Communities, Inc.:      
      5.70%, 3/15/17   775   830,277  
      6.10%, 3/15/20   800   866,981  
ERP Operating LP:      
      5.38%, 8/01/16   775   817,385  
      5.75%, 6/15/17   800   857,885  
    3,372,528  
Semiconductors & Semiconductor Equipment — 1.0%      
KLA-Tencor Corp., 6.90%, 5/01/18   461   509,796  
National Semiconductor Corp., 6.60%, 6/15/17   539   593,609  
    1,103,405  
Specialty Retail — 1.0%      
AutoNation, Inc., 6.75%, 4/15/18   445   446,669  
AutoZone, Inc., 7.13%, 8/01/18   300   346,753  
Ltd. Brands, Inc., 7.00%, 5/01/20 (c)   230   234,600  
    1,028,022  
Tobacco — 1.8%      
Altria Group, Inc.:      
      9.70%, 11/10/18   800   1,006,073  
      9.25%, 8/06/19   775   957,343  
    1,963,416  

  Par    
Corporate Bonds   (000)             Value  
Wireless Telecommunication Services — 4.0%      
Cricket Communications, Inc., 7.75%, 5/15/16   $ 155   $ 160,813  
Nextel Communications, Inc., Series E,      
  6.88%, 10/31/13   535   525,637  
SBA Tower Trust, 5.10%, 4/15/42 (a)   3,500   3,605,019  
    4,291,469  
Total Corporate Bonds — 93.7%     100,437,954  
Preferred Securities      
Capital Trusts      
Building Products — 0.3%      
C8 Capital SPV Ltd., 6.64% (a)(b)(d)   490   357,426  
Capital Markets — 4.6%      
Ameriprise Financial, Inc., 7.52%, 6/01/66 (b)   500   505,000  
Lehman Brothers Holdings Capital Trust V,      
  2.09% (d)(e)(f)   1,600   160  
State Street Capital Trust III, 8.25% (b)(d)   725   744,423  
State Street Capital Trust IV, 1.26%, 6/01/67 (b)   4,740   3,653,663  
    4,903,246  
Commercial Banks — 3.2%      
Bank of Ireland Capital Funding II, LP,      
  5.57% (a)(b)(d)(e)(f)   429   304,590  
Bank of Ireland Capital Funding III, LP,      
  6.11% (a)(b)(d)(e)(f)   740   525,400  
Barclays Bank Plc, 5.93% (a)(b)(d)   500   452,500  
First Empire Capital Trust II, 8.28%, 6/01/27   910   844,943  
National City Preferred Capital Trust I, 12.00% (b)(d)   300   347,226  
SunTrust Preferred Capital I, 5.85% (b)(d)   135   105,638  
USB Capital XIII Trust, 6.63%, 12/15/39   825   867,578  
    3,447,875  
Diversified Financial Services — 3.0%      
Farm Credit Bank of Texas, Series 1, 7.56% (b)(d)   1,000   853,270  
JPMorgan Chase Capital XXIII, 1.25%, 5/15/77 (b)(g)   3,085   2,395,900  
    3,249,170  
Electric Utilities — 0.4%      
PPL Capital Funding, 6.70%, 3/30/67 (b)   500   457,500  
Insurance — 10.6%      
AXA SA, 6.38% (a)(b)(d)   1,000   890,000  
Ace Capital Trust II, 9.70%, 4/01/30   500   606,907  
The Allstate Corp., 6.50%, 5/15/67 (b)   500   480,000  
Chubb Corp., 6.38%, 3/29/67 (b)(h)   500   500,625  
Farmers Exchange Capital, 7.05%, 7/15/28 (a)   500   471,639  
Genworth Financial, Inc., 6.15%, 11/15/66 (b)   750   600,000  
Great West Life & Annuity Insurance Co.,      
  7.15%, 5/16/46 (a)(b)   500   480,000  
Liberty Mutual Group, Inc., 10.75%, 6/15/88 (a)(b)   500   582,500  
Lincoln National Corp., 7.00%, 5/17/66 (b)   500   462,500  
MetLife, Inc., 6.40%, 12/15/66   500   472,500  
Nationwide Life Global Funding I, 6.75%, 5/15/67   500   427,500  
Progressive Corp., 6.70%, 6/15/67 (b)   500   495,481  
Reinsurance Group of America, 6.75%, 12/15/65 (b)   700   662,754  
The Travelers Cos., Inc., 6.25%, 3/15/67 (b)   500   491,739  
ZFS Finance (USA) (a)(b):      
Trust II, 6.45%, 12/15/65   1,800   1,737,000  
Trust IV, 5.88%, 5/09/32   146   139,485  
Trust V, 6.50%, 5/09/67   1,097   1,050,377  
Zenith National Insurance Capital Trust I,      
  8.55%, 8/01/28 (a)   1,000   865,000  
    11,416,007  

See Notes to Financial Statements.

12 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust I, Inc. (PSW)

(Percentages shown are based on Net Assets)

  Par    
Capital Trusts   (000)   Value  
Multi-Utilities — 1.4%      
Dominion Resources Capital Trust I,      
  7.83%, 12/01/27 (g)   $ 500   $ 516,467  
Dominion Resources, Inc., 7.50%, 6/30/66 (b)   500   507,500  
Puget Sound Energy, Inc., Series A,      
  6.97%, 6/01/67 (b)   475   451,473  
    1,475,440  
Oil, Gas & Consumable Fuels — 1.3%      
Enterprise Products Operating LLC,      
  8.38%, 8/01/66 (b)   825   858,000  
TransCanada PipeLines Ltd., 6.35%, 5/15/67 (b)   500   480,821  
    1,338,821  
Total Capital Trusts — 24.8%     26,645,485  
Preferred Stocks   Shares    
Commercial Banks — 1.8%      
First Tennessee Bank NA, 3.75% (a)(b)   1,176   752,640  
Provident Financial Group, Inc., 7.75%   42,000   1,044,750  
Royal Bank of Scotland Group Plc, Series M, 6.40%   5,000   66,700  
    1,864,090  
Diversified Financial Services — 1.0%      
Falcons Funding Trust I, 8.88% (a)(b)   1,100   1,096,906  
Electric Utilities — 3.3%      
Alabama Power Co., 6.50%   25,000   649,750  
Entergy Arkansas, Inc., 6.45%   28,800   683,102  
Entergy Louisiana LLC, 6.95%   22,650   2,216,047  
    3,548,899  
Insurance — 3.6%      
Aspen Insurance Holdings Ltd., 7.40% (b)   55,000   1,276,000  
Axis Capital Holdings Ltd.:      
      Series A, 7.25%   35,000   853,650  
      Series B, 7.50% (b)   9,000   850,500  
Endurance Specialty Holdings Ltd., Series A, 7.75%   35,200   854,304  
    3,834,454  
Real Estate Investment Trusts (REITs) — 2.7%      
BRE Properties, Inc., Series D, 6.75%   10,000   228,200  
iStar Financial, Inc., Series I, 7.50%   59,500   952,000  
Public Storage:      
      Series F, 6.45%   10,000   235,400  
      Series I, 7.25%   40,000   1,016,400  
      Series M, 6.63%   20,000   491,600  
    2,923,600  
Wireless Telecommunication Services — 2.8%      
Centaur Funding Corp., 9.08%   2,720   2,992,850  
Total Preferred Stocks — 15.2%     16,260,799  
Trust Preferreds      
Consumer Finance — 1.4%      
Capital One Capital II, 7.50%, 6/15/66   63,034   1,514,729  
Insurance — 2.8%      
ABN AMRO North America Capital Funding Trust II,      
  0.31% (a)(b)(d)   80,000   1,586,536  
Lincoln National Capital VI, Series F, 6.75%, 9/11/52   58,966   1,396,139  
    2,982,675  
Total Trust Preferreds — 4.2%     4,497,404  
Total Preferred Securities — 44.2%     47,403,688  

Par  
Taxable Municipal Bonds   (000)   Value  
Metropolitan Transportation Authority, RB,      
Build America Bonds, 6.55%, 11/15/31   $ 800   $ 843,440  
State of California, GO, Build America Bonds,      
  7.35%, 11/01/39   400   432,152  
State of Illinois, GO, Pension, 5.10%, 6/01/33   775   668,461  
Total Taxable Municipal Bonds — 1.8%     1,944,053  
Total Long-Term Investments      
(Cost — $149,969,746) — 139.7%     149,785,695  
Short-Term Securities   Shares    
BlackRock Liquidity Funds, TempFund,      
  Institutional Class, 0.13% (i)(j)   124,379   124,379  
Total Short-Term Securities      
(Cost — $124,379) — 0.1%     124,379  
Total Investments (Cost — $150,094,125*) — 139.8%     149,910,074  
Liabilities in Excess of Other Assets — (2.2)%     (2,398,252)  
Preferred Shares, at Redemption Value — (37.6)%     (40,259,152)  
Net Assets Applicable to Common Shares — 100.0%     $107,252,670  

* The cost and unrealized appreciation (depreciation) of investments as of April 30,
2010, as computed for federal income tax purposes, were as follows:

Aggregate cost   $ 150,119,907  
Gross unrealized appreciation   $ 5,240,140  
Gross unrealized depreciation   (5,449,973)  
Net unrealized depreciation   $ (209,833)  

(a) Security exempt from registration under Rule 144A of the Securities Act of 1933.
These securities may be resold in transactions exempt from registration to qualified
institutional investors.
(b) Variable rate security. Rate shown is as of report date.
(c) When-issued security. Unsettled when-issued transactions were as follows:

    Unrealized  
Counterparty   Value   Appreciation  
Bank of America, NA   $ 234,600   $ 4,600  

(d) Security is perpetual in nature and has no stated maturity date.
(e) Issuer filed for bankruptcy and/or is in default of interest payments.
(f) Non-income producing security.
(g) All or a portion of security has been pledged as collateral in connection with open
reverse repurchase agreements.
(h) All or a portion of security has been pledged as collateral in connection with swaps.
(i) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

  Shares     Shares    
  Held at     Held at    
  October 31,   Net   April 30,    
Affiliate   2009   Activity   2010   Income  
BlackRock Liquidity          
    Funds, TempFund,          
    Institutional Class   33,286,296   (33,161,917)   124,379   $25,184  

(j) Represents the current yield as of report date.
For Fund compliance purposes, the Fund’s industry classifications refer to any one
or more of the industry sub-classifications used by one or more widely recognized
market indexes or rating group indexes, and/or as defined by Fund management.
This definition may not apply for purposes of this report, which may combine such
industry sub-classifications for reporting ease.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

13


Schedule of Investments (concluded)

BlackRock Credit Allocation Income Trust I, Inc. (PSW)

  Reverse repurchase agreements outstanding as of April 30, 2010 were as follows:  
    Interest   Trade   Maturity       Net Closing   Face  
  Counterparty   Rate   Date   Date           Amount   Amount  
  Credit Suisse              
  Securities   0.38%   4/22/10   5/24/10       $2,663,833   $2,662,946  
  Financial futures contracts purchased as of April 30, 2010 were as follows:  
      Expiration                     Notional   Unrealized  
  Contracts   Issue   Date         Value   Appreciation  
  39   2-Year U.S.            
                               Treasury Bond   June 2010                     $8,458,211   $ 27,336  
  6   30-Year U.S.            
                                  Treasury Bond   June 2010                      $ 694,935   19,440  
  Total             $ 46,776  
  Credit default swaps on single-name issues — buy protection outstanding as of April  
  30, 2010 were as follows:            
    Pay                 Notional    
    Fixed   Counter-       Amount   Unrealized  
  Issuer   Rate   party     Expiration   (000)   Depreciation  
  Nordstrom, Inc.                      5.20%     Deutsche   June        
      Bank AG   2014              $ 1,000   $ (175,918)  

Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an
indication of the risk associated with investing in those securities. For information
about the Fund’s policy regarding valuation of investments and other significant
accounting policies, please refer to Note 1 of the Notes to Financial Statements.
The following tables summarize the inputs used as of April 30, 2010 in determining
the fair valuation of the Fund’s investments:

    Investments in Securities    
Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets:            
Long-Term            
Investments:            
    Capital            
    Trusts       $ 26,645,485                 $ 26,645,485  
    Corporate            
    Bonds       100,437,954                 100,437,954  
    Preferred            
    Stocks   $ 6,624,004   9,636,795                 16,260,799  
    Taxable            
    Municipal            
    Bonds       1,944,053                 1,944,053  
    Trust            
    Preferreds     2,910,868   1,586,536                 4,497,404  
Short-Term            
Securities     124,379                   124,379  
Total   $ 9,659,251   140,250,823                 $149,910,074  

Other Financial Instruments 1

Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets   $ 46,776                   $ 46,776  
Liabilities               — $   (175,918)                         (175,918)  
Total   $ 46,776 $   (175,918)                 $ (129,142)  

1 Other financial instruments are financial futures contracts and swaps, which are
shown at the unrealized appreciation/depreciation on the instrument.

The following table is a reconciliation of Level 3 investments for which significant
unobservable inputs were used to determine fair value:

Investments in Securities

  Capital  
  Trusts  
Balance, as of October 31, 2009   $ 576,450  
Accrued discounts/premiums    
Net realized gain (loss)   (156,053)  
Net change in unrealized appreciation/depreciation 2   332,190  
Net purchases (sales)   (752,587)  
Net transfers in/out    
Balance, as of April 30, 2010   $ —  

2 Included in the related net change in unrealized appreciation/depreciation on
the Statements of Operations. The change in unrealized appreciation/deprecia-
tion on securities still held at April 30, 2010 was $0.

See Notes to Financial Statements.

14 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments April 30, 2010 (Unaudited)

BlackRock Credit Allocation Income Trust II, Inc. (PSY)

(Percentages shown are based on Net Assets)

  Par    
Corporate Bonds   (000)   Value  
Aerospace & Defense — 2.7%      
BE Aerospace, Inc., 8.50%, 7/01/18   $ 2,500   $ 2,675,000  
Bombardier, Inc., 7.75%, 3/15/20 (a)   3,205   3,405,312  
United Technologies Corp., 5.70%, 4/15/40   6,250   6,525,819  
    12,606,131  
Airlines — 0.4%      
Continental Airlines Pass-Through Certificates,      
Series 2009-2, Class B, 9.25%, 5/10/17   1,625   1,738,750  
Auto Components — 0.6%      
Icahn Enterprises LP (a):      
      7.75%, 1/15/16   880   855,800  
      8.00%, 1/15/18   2,000   1,945,000  
    2,800,800  
Beverages — 0.4%      
Constellation Brands, Inc., 7.25%, 5/15/17   1,970   2,009,400  
Capital Markets — 1.7%      
Ameriprise Financial, Inc., 5.30%, 3/15/20   3,250   3,382,714  
Morgan Stanley, 7.30%, 5/13/19   4,000   4,392,312  
    7,775,026  
Chemicals — 0.3%      
CF Industries, Inc., 7.13%, 5/01/20   1,125   1,184,063  
Commercial Services & Supplies — 2.6%      
Browning-Ferris Industries, Inc., 7.40%, 9/15/35   3,742   4,270,363  
Corrections Corp.of America, 7.75%, 6/01/17   3,375   3,577,500  
Waste Management, Inc., 6.13%, 11/30/39   4,000   4,165,152  
    12,013,015  
Communications Equipment — 0.7%      
Brocade Communications Systems, Inc.,      
6.88%, 1/15/20 (a)   2,965   3,061,363  
Consumer Finance — 5.2%      
American Express Co., 8.13%, 5/20/19   4,000   4,899,164  
Capital One Bank USA NA, 8.80%, 7/15/19   3,325   4,077,271  
Inmarsat Finance Plc, 7.38%, 12/01/17 (a)   2,135   2,225,738  
SLM Corp., 4.00%, 7/25/14 (b)   13,900   12,940,761  
    24,142,934  
Containers & Packaging — 0.8%      
Ball Corp.:      
      7.13%, 9/01/16   1,750   1,859,375  
      6.75%, 9/15/20   1,835   1,876,288  
    3,735,663  
Diversified Financial Services — 2.2%      
Bank of America Corp., 7.63%, 6/01/19   6,750   7,705,246  
GMAC, Inc., 8.30%, 2/12/15 (a)   2,500   2,609,375  
    10,314,621  
Diversified Telecommunication Services — 3.9%      
AT&T, Inc., 6.30%, 1/15/38   4,000   4,155,676  
New Communications Holdings, Inc.,      
8.50%, 4/15/20 (a)   3,100   3,193,000  
Qwest Corp., 8.38%, 5/01/16   2,795   3,186,300  
Verizon Communications, Inc., 7.35%, 4/01/39   4,025   4,779,498  
Windstream Corp.:      
      8.63%, 8/01/16   1,000   1,023,750  
      7.88%, 11/01/17   1,900   1,885,750  
    18,223,974  
Electric Utilities — 1.6%      
Progress Energy Inc., 7.00%, 10/30/31   4,000   4,569,696  
Southern California Edison Co., 5.50%, 3/15/40   2,850   2,900,764  
    7,470,460  

  Par    
Corporate Bonds   (000)   Value  
Food & Staples Retailing — 3.4%      
CVS Caremark Corp., 6.30%, 6/01/62 (b)   $ 6,600   $ 6,369,000  
Wal-Mart Stores, Inc.:      
      5.25%, 9/01/35   2,500   2,461,938  
      6.20%, 4/15/38   6,250   6,880,087  
    15,711,025  
Food Products — 0.8%      
Kraft Foods, Inc.:      
      6.50%, 8/11/17   1,665   1,886,490  
      6.13%, 8/23/18   1,660   1,831,685  
    3,718,175  
Gas Utilities — 0.9%      
Nisource Finance Corp., 6.13%, 3/01/22   4,000   4,247,028  
Health Care Equipment & Supplies — 1.1%      
Medtronic, Inc.:      
      6.50%, 3/15/39   650   750,740  
      5.55%, 3/15/40   4,412   4,555,942  
    5,306,682  
Health Care Providers & Services — 3.0%      
Aetna, Inc., 6.75%, 12/15/37   3,400   3,747,116  
HCA, Inc., 7.25%, 9/15/20 (a)   2,550   2,667,938  
HCA, Inc./DE, 8.50%, 4/15/19 (a)   1,800   1,977,750  
Tenet Healthcare Corp., 10.00%, 5/01/18 (a)   1,530   1,742,288  
UnitedHealth Group, Inc., 6.88%, 2/15/38   3,400   3,735,549  
    13,870,641  
Insurance — 4.8%      
Lincoln National Corp.:      
      8.75%, 7/01/19   1,750   2,183,006  
      6.25%, 2/15/20   3,400   3,634,155  
Northwestern Mutual Life Insurance,      
  6.06%, 3/30/40 (a)   3,800   3,924,921  
Principal Financial Group, Inc., 8.88%, 5/15/19   980   1,208,884  
Prudential Financial, Inc., 6.63%, 12/01/37   3,400   3,748,391  
QBE Insurance Group Ltd., 9.75%, 3/14/14 (a)   5,967   7,267,603  
Structured Asset Repackaged Trust,      
  Series 2004-1, 0.78%, 4/21/11 (a)(b)   214   207,440  
    22,174,400  
Life Sciences Tools & Services — 1.8%      
Bio-Rad Laboratories, Inc., 8.00%, 9/15/16   3,825   4,083,187  
Life Technologies Corp., 6.00%, 3/01/20   4,200   4,419,072  
    8,502,259  
Machinery — 1.5%      
Ingersoll-Rand Global Holding Co., Ltd.,      
  9.50%, 4/15/14   3,400   4,168,730  
Navistar International Corp., 8.25%, 11/01/21   2,550   2,690,250  
    6,858,980  
Media — 7.2%      
CSC Holdings, Inc., 8.63%, 2/15/19 (a)   1,200   1,311,000  
CSC Holdings LLC, 8.50%, 6/15/15 (a)   1,500   1,597,500  
Comcast Corp., 6.30%, 11/15/17   3,400   3,768,540  
Cox Communications, Inc., 8.38%, 3/01/39 (a)   3,400   4,414,944  
DISH DBS Corp.:      
      7.00%, 10/01/13   1,750   1,811,250  
      7.88%, 9/01/19   1,100   1,155,000  
Intelsat Corp., 9.25%, 6/15/16   1,800   1,899,000  
News America, Inc., 6.15%, 3/01/37   4,200   4,300,061  
Time Warner Cable, Inc., 6.75%, 6/15/39   4,050   4,377,592  
Time Warner, Inc., 7.70%, 5/01/32   4,150   4,870,062  
UPC Germany GmbH, 8.13%, 12/01/17 (a)   1,030   1,050,600  
Virgin Media Secured Finance Plc,      
  6.50%, 1/15/18 (a)   2,675   2,688,375  
    33,243,924  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

15


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust II, Inc. (PSY)

(Percentages shown are based on Net Assets)

    Par    
Corporate Bonds     (000)   Value  
Metals & Mining — 1.2%        
Phelps Dodge Corp., 7.13%, 11/01/27   $ 2,900   $ 3,001,851  
Teck Resources Ltd., 10.75%, 5/15/19     1,750   2,178,750  
United States Steel Corp., 7.38%, 4/01/20     375   385,312  
      5,565,913  
Multi-Utilities — 1.5%        
CenterPoint Energy, Inc.:        
      5.95%, 2/01/17     3,150   3,317,114  
      6.50%, 5/01/18     3,350   3,652,056  
      6,969,170  
Multiline Retail — 0.8%        
Dollar General Corp., 10.63%, 7/15/15     3,275   3,639,344  
Oil, Gas & Consumable Fuels — 3.6%        
Enbridge Energy Partners LP, 9.88%, 3/01/19     2,100   2,780,114  
Enterprise Products Operating LLC, 6.65%, 4/15/18   4,200   4,785,682  
Kinder Morgan Energy Partners LP, 6.85%, 2/15/20   4,200   4,836,888  
ONEOK Partners LP, 8.63%, 3/01/19     3,400   4,267,129  
      16,669,813  
Paper & Forest Products — 2.5%        
Georgia-Pacific LLC, 8.25%, 5/01/16 (a)     3,400   3,723,000  
International Paper Co.:        
      7.50%, 8/15/21     3,325   3,905,575  
      7.30%, 11/15/39     3,400   3,769,549  
      11,398,124  
Pharmaceuticals — 8.5%        
Abbott Laboratories:        
      6.15%, 11/30/37     588   656,301  
      6.00%, 4/01/39     5,891   6,487,858  
Bristol-Myers Squibb Co.:        
      5.88%, 11/15/36     5,000   5,281,645  
      6.13%, 5/01/38     1,471   1,605,997  
Eli Lilly & Co., 5.95%, 11/15/37     1,471   1,600,638  
GlaxoSmithKline Capital, Inc., 6.38%, 5/15/38     7,250   8,207,711  
Merck & Co., Inc., 6.50%, 12/01/33     2,070   2,393,088  
Pfizer, Inc., 7.20%, 3/15/39     6,250   7,756,431  
Schering-Plough Corp., 6.55%, 9/15/37     4,572   5,333,988  
      39,323,657  
Real Estate Investment Trusts (REITs) — 3.1%        
AvalonBay Communities, Inc.:        
      5.70%, 3/15/17     3,350   3,588,939  
      6.10%, 3/15/20     3,400   3,684,668  
ERP Operating LP:        
      5.38%, 8/01/16     3,350   3,533,215  
      5.75%, 6/15/17     3,405   3,651,372  
      14,458,194  
Semiconductors & Semiconductor Equipment — 1.0%      
KLA-Tencor Corp., 6.90%, 5/01/18     1,928   2,132,073  
National Semiconductor Corp., 6.60%, 6/15/17     2,334   2,570,472  
      4,702,545  
Specialty Retail — 1.0%        
AutoNation, Inc., 6.75%, 4/15/18     1,965   1,972,369  
AutoZone, Inc., 7.13%, 8/01/18     1,350   1,560,389  
Ltd. Brands, Inc., 7.00%, 5/01/20 (c)     980   999,600  
      4,532,358  
Tobacco — 1.8%        
Altria Group, Inc.:        
      9.70%, 11/10/18     3,400   4,275,809  
      9.25%, 8/06/19     3,350   4,138,195  
      8,414,004  

    Par    
Corporate Bonds     (000)   Value  
Wireless Telecommunication Services — 4.0%        
Cricket Communications, Inc., 7.75%, 5/15/16   $ 670   $ 695,125  
Nextel Communications, Inc., Series E,        
  6.88%, 10/31/13     2,340   2,299,050  
SBA Tower Trust, 5.10%, 4/15/42 (a)     15,225   15,681,834  
      18,676,009  
Total Corporate Bonds — 76.6%       355,058,445  
Preferred Securities        
Capital Trusts        
Building Products — 0.3%        
C8 Capital SPV Ltd., 6.64% (a)(b)(d)     1,960   1,429,702  
Capital Markets — 4.2%        
Ameriprise Financial, Inc., 7.52%, 6/01/66 (b)     2,500   2,525,000  
Lehman Brothers Holdings Capital Trust V,        
  2.09% (d)(e)(f)     6,400   640  
State Street Capital Trust III, 8.25% (b)(d)     2,920   2,998,227  
State Street Capital Trust IV, 1.26%, 6/01/67 (b)   18,235   14,055,811  
      19,579,678  
Commercial Banks — 7.7%        
Bank of Ireland Capital Funding II, LP,        
  5.57% (a)(b)(d)(e)(f)     1,715   1,217,650  
Bank of Ireland Capital Funding III, LP,        
  6.11% (a)(b)(d)(e)(f)     2,951   2,095,210  
Bank One Capital III, 8.75%, 9/01/30     2,000   2,393,608  
Barclays Bank Plc, 5.93% (a)(b)(d)     2,500   2,262,500  
First Empire Capital Trust II, 8.28%, 6/01/27     3,630   3,370,488  
HSBC Capital Funding LP/Jersey Channel Islands,      
  10.18% (a)(b)(d)(g)     4,835   6,183,965  
Lloyds Banking Group Plc, 6.66% (a)(b)(d)     5,000   3,300,000  
National City Preferred Capital Trust I, 12.00% (b)(d)   1,100   1,273,162  
NationsBank Capital Trust III, 0.83%, 1/15/27 (b)   13,470   9,798,172  
SunTrust Preferred Capital I, 5.85% (b)(d)     307   240,227  
USB Capital XIII Trust, 6.63%, 12/15/39     3,500   3,680,635  
      35,815,617  
Diversified Financial Services — 1.7%        
Farm Credit Bank of Texas, Series 1, 7.56% (b)(d)   2,500   2,133,175  
JPMorgan Chase Capital XXIII, 1.25%, 5/15/77 (b)   7,500   5,824,718  
      7,957,893  
Electric Utilities — 0.6%        
PPL Capital Funding, 6.70%, 3/30/67 (b)     3,000   2,745,000  
Insurance — 13.5%        
AXA SA, 6.38% (a)(b)(d)     3,000   2,670,000  
Ace Capital Trust II, 9.70%, 4/01/30     5,000   6,069,070  
The Allstate Corp., 6.50%, 5/15/67 (b)     5,000   4,800,000  
Aon Corp., 8.21%, 1/01/27     2,500   2,723,765  
Chubb Corp., 6.38%, 3/29/67 (b)     2,000   2,002,500  
Farmers Exchange Capital, 7.05%, 7/15/28 (a)     2,500   2,358,193  
GE Global Insurance Holding Corp., 7.75%, 6/15/30   2,000   2,198,502  
Genworth Financial, Inc., 6.15%, 11/15/66 (b)     3,000   2,400,000  
Liberty Mutual Group, Inc., 10.75%, 6/15/88 (a)(b)   2,925   3,407,625  
Lincoln National Corp., 7.00%, 5/17/66 (b)     3,350   3,098,750  
MetLife, Inc., 6.40%, 12/15/66     6,825   6,449,625  
Nationwide Life Global Funding I, 6.75%, 5/15/67   7,000   5,985,000  
Principal Life Insurance Co., 8.00%, 3/01/44 (a)   2,500   2,611,485  
Progressive Corp., 6.70%, 6/15/67 (b)(g)     2,000   1,981,922  
Reinsurance Group of America, 6.75%, 12/15/65 (b)   3,000   2,840,376  
The Travelers Cos., Inc., 6.25%, 3/15/67 (b)     3,000   2,950,431  

See Notes to Financial Statements.

16 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust II, Inc. (PSY)

(Percentages shown are based on Net Assets)

  Par    
Capital Trusts   (000)   Value  
Insurance (concluded)      
ZFS Finance (USA) (a)(b):      
      Trust IV, 5.88%, 5/09/32   $ 379   $ 362,089  
      Trust V, 6.50%, 5/09/67   4,312   4,128,740  
Zenith National Insurance Capital Trust I,      
  8.55%, 8/01/28 (a)   3,750   3,243,750  
    62,281,823  
Multi-Utilities — 1.4%      
Dominion Resources Capital Trust I,      
  7.83%, 12/01/27   2,500   2,582,335  
Dominion Resources, Inc., 7.50%, 6/30/66 (b)   3,900   3,958,500  
    6,540,835  
Oil, Gas & Consumable Fuels — 1.3%      
Enterprise Products Operating LLC,      
  8.38%, 8/01/66 (b)   2,000   2,080,000  
TransCanada PipeLines Ltd., 6.35%, 5/15/67 (b)   4,000   3,846,568  
    5,926,568  
Road & Rail — 0.8%      
BNSF Funding Trust I, 6.61%, 12/15/55 (b)   3,750   3,703,125  
Total Capital Trusts — 31.5%     145,980,241  
Preferred Stocks   Shares    
Capital Markets — 0.0%      
Deutsche Bank Contingent Capital Trust II, 6.55%   530   11,750  
Commercial Banks — 7.1%      
Barclays Bank Plc, 8.13% (h)   225,000   5,661,000  
First Tennessee Bank NA, 3.75% (a)(b)   4,650   2,976,000  
Provident Financial Group, Inc., 7.75%   166,800   4,149,150  
Royal Bank of Scotland Group Plc,      
  Series M, 6.40%   15,000   200,100  
SG Preferred Capital II, 6.30%   23,000   19,887,813  
    32,874,063  
Diversified Financial Services — 1.0%      
Falcons Funding Trust I, 8.88% (a)(b)   4,750   4,736,641  
Electric Utilities — 3.0%      
Alabama Power Co.:      
      5.83%   14,000   348,320  
      6.50%   145,000   3,768,550  
Entergy Arkansas, Inc., 6.45%   114,400   2,713,431  
Entergy Louisiana LLC, 6.95%   49,850   4,877,260  
Interstate Power & Light Co., Series B, 8.38%   80,000   2,338,400  
    14,045,961  
Insurance — 6.8%      
Aspen Insurance Holdings Ltd., 7.40% (b)   194,000   4,500,800  
Axis Capital Holdings Ltd.:      
      Series A, 7.25%   129,300   3,153,627  
      Series B, 7.50% (b)   36,000   3,402,000  
Endurance Specialty Holdings Ltd.,      
  Series A, 7.75%   139,200   3,378,384  
MetLife, Inc., Series B, 6.50%   237,606   5,757,193  
Prudential Plc, 6.50%   92,400   2,137,212  
Zurich RegCaPS Funding Trust II, 6.58% (a)(b)   9,800   9,077,250  
    31,406,466  
Real Estate Investment Trusts (REITs) — 2.4%      
BRE Properties, Inc., Series D, 6.75%   35,000   798,700  
Kimco Realty Corp., Series F, 6.65%   50,000   1,164,000  

Preferred Stocks     Shares   Value  
Real Estate Investment Trusts (REITs) (concluded)        
Public Storage:        
Series F, 6.45%     40,000   $ 941,600  
Series I, 7.25%     160,000   4,065,600  
Series M, 6.63%     71,900   1,767,302  
Regency Centers Corp., Series D, 7.25%     100,000   2,360,000  
      11,097,202  
Wireless Telecommunication Services — 0.6%        
Centaur Funding Corp., 9.08%     2,423   2,666,057  
Total Preferred Stocks — 20.9%       96,838,140  
Trust Preferreds        
Communications Equipment — 0.4%        
Corporate-Backed Trust Certificates, Motorola        
  Debenture Backed, Series 2002-14, 8.38%, 11/15/28   80,000   1,949,802  
Consumer Finance — 1.3%        
Capital One Capital II, 7.50%, 6/15/66     253,466   6,090,874  
Electric Utilities — 0.8%        
Georgia Power Co., Series O, 1.48%, 4/15/33     50,000   1,252,353  
HECO Capital Trust III, 6.50%, 3/18/34     50,000   1,264,993  
National Rural Utilities Cooperative Finance Corp.,        
  6.75%, 2/15/43     50,000   1,237,251  
      3,754,597  
Insurance — 4.2%        
ABN AMRO North America Capital Funding        
  Trust II, 0.31% (a)(b)(d)     440,000   8,726,578  
Lincoln National Capital VI, Series F,        
  6.75%, 9/11/52     131,034   3,102,494  
W.R. Berkley Capital Trust II, 6.75%, 7/26/45     295,000   7,264,742  
      19,093,814  
Total Trust Preferreds — 6.7%       30,889,087  
Total Preferred Securities — 59.1%       273,707,468  
    Par    
Taxable Municipal Bonds     (000)    
Metropolitan Transportation Authority, RB,        
  Build America Bonds, 6.55%, 11/15/31   $ 3,450   3,637,335  
State of California, GO, Build America Bonds,        
  7.35%, 11/01/39     1,725   1,863,655  
State of Illinois, GO, Pension, 5.10%, 6/01/33     3,475   2,997,292  
Total Taxable Municipal Bonds — 1.8%       8,498,282  
Total Long-Term Investments        
(Cost — $650,680,840) — 137.5%       637,264,195  
Short-Term Securities     Shares    
BlackRock Liquidity Funds, TempFund,        
  Institutional Class, 0.13% (i)(j)   1,817,048   1,817,048  
Total Short-Term Securities        
(Cost — $1,817,048) — 0.4%       1,817,048  
Total Investments (Cost — $652,497,888*) — 137.9%       639,081,243  
Liabilities in Excess of Other Assets — (1.4)%       (6,662,171)  
Preferred Shares, at Redemption Value — (36.5)%       (169,091,457)  
Net Assets Applicable to Common Shares — 100.0%       $ 463,327,615  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

17


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust II, Inc. (PSY)

* The cost and unrealized appreciation (depreciation) of investments as of April 30,
2010, as computed for federal income tax purposes, were as follows:

Aggregate cost   $ 654,272,212  
Gross unrealized appreciation   $ 15,173,099  
Gross unrealized depreciation   (30,364,068)  
Net unrealized depreciation   $ (15,190,969)  

(a) Security exempt from registration under Rule 144A of the Securities Act of 1933.
These securities may be resold in transactions exempt from registration to qualified
institutional investors.
(b) Variable rate security. Rate shown is as of report date.
(c) When-issued security. Unsettled when-issued transactions were as follows:

    Unrealized  
Counterparty   Value   Appreciation  
Bank of America, NA   $ 999,600   $ 19,600  

(d) Security is perpetual in nature and has no stated maturity date.
(e) Issuer filed for bankruptcy and/or is in default of interest payments.
(f) Non-income producing security.
(g) All or a portion of security has been pledged as collateral in connection with open
reverse repurchase agreements.
(h) All or a portion of security has been pledged as collateral in connection with open
financial futures contracts.
(i) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

        Shares     Shares    
        Held at     Held at    
      October 31,   Net      April 30,    
  Affiliate       2009   Activity   2010   Income  
  BlackRock Liquidity            
      Funds, TempFund,            
      Institutional Class   41,019,397      (39,202,349)      1,817,048   $87,691  
(j) Represents the current yield as of report date.      
  For Fund compliance purposes, the Fund's industry classifications refer to any one  
  or more of the industry sub-classifications used by one or more widely recognized  
  market indexes or rating group indexes, and/or as defined by Fund management.  
  This definition may not apply for purposes of this report, which may combine such  
  industry sub-classifications for reporting ease.      
  Reverse repurchase agreements outstanding as of April 30, 2010 were as follows:  
            Interest   Trade   Maturity   Net Closing   Face  
  Counterparty     Rate   Date   Date   Amount   Amount  
  Credit Suisse              
      Securities           0.38%   4/22/10   5/24/10   $ 7,709,771   $ 7,707,202  
  Financial futures contracts purchased as of April 30, 2010 were as follows:  
        Expiration   Notional   Unrealized  
  Contracts         Issue   Date   Amount   Appreciation  
  22   30-Year U.S.          
    Treasury Bond   June 2010   $2,548,095   $ 71,280  

Credit default swaps on single-name issues — buy protection outstanding as of
April 30, 2010 were as follows:

  Pay       Notional    
  Fixed   Counter-     Amount   Unrealized  
Issuer   Rate   party   Expiration   (000)   Depreciation  
Nordstrom, Inc.   5.20%   Deutsche   June      
    Bank AG   2014   $ 2,000   $ (351,837)  

Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund's own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an
indication of the risk associated with investing in those securities. For information
about the Fund's policy regarding valuation of investments and other significant
accounting policies, please refer to Note 1 of the Notes to Financial Statements.
The following tables summarize the inputs used as of April 30, 2010 in determining
the fair valuation of the Fund's investments:

Investments in Securities

Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets:            
Long-Term            
Investments:            
    Capital            
    Trusts       $145,980,241     $145,980,241  
    Corporate            
    Bonds       354,851,005 $   207,440   355,058,445  
    Preferred            
    Stocks   $42,352,538   54,485,602     96,838,140  
    Taxable            
    Municipal            
    Bonds       8,498,282     8,498,282  
    Trust            
    Preferreds   22,162,509   8,726,578     30,889,087  
Short-Term            
Securities     1,817,048       1,817,048  
Total   $66,332,095   $572,541,708 $   207,440   $639,081,243  
Other Financial Instruments 1

Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets   $ 71,280       $ 71,280  
Liabilities       $ (351,837)     (351,837)  
Total   $ 71,280   $ (351,837)     $ (280,557)  

1 Other financial instruments are financial futures contracts and swaps, which are
shown at the unrealized appreciation/depreciation on the instrument.

See Notes to Financial Statements.

18 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (concluded)

BlackRock Credit Allocation Income Trust II, Inc. (PSY)

The following table is a reconciliation of Level 3 investments for which significant unobservable inputs were used to determine fair value:

    Investments in Securities    
      Capital   Corporate   Preferred    
  Trusts   Bonds   Stocks   Total  
Balance, as of October 31, 2009   $ 2,271,150   $ 266,121   $ 13,800,000   $ 16,337,271  
Accrued discounts/premiums          
Net realized gain (loss)   (614,833)   27     (614,806)  
Net change in unrealized appreciation/depreciation 1   1,308,795   26,449   6,087,813   7,423,057  
Net purchases (sales)   (2,965,112)   (85,157)     (3,050,269)  
Net transfers in/out       (19,887,813)   (19,887,813)  
Balance, as of April 30, 2010   $ —   $ 207,440     $ 207,440  

1 Included in the related net change in unrealized appreciation/depreciation on the Statements of Operations. The change in unrealized appreciation/depreciation on securities
still held at April 30, 2010 was $26,449.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

19


Schedule of Investments April 30, 2010 (Unaudited)

BlackRock Credit Allocation Income Trust III (BPP)
(Percentages shown are based on Net Assets)

Common Stocks   Shares   Value  
Specialty Retail — 0.0%      
Lazydays RV Center, Inc. (a)   8,575   $ 33,444  
Total Common Stocks — 0.0%     33,444  
  Par    
Corporate Bonds   (000)    
Aerospace & Defense — 2.5%      
BE Aerospace, Inc., 8.50%, 7/01/18   $ 1,215   1,300,050  
Bombardier, Inc., 7.75%, 3/15/20 (b)   1,405   1,492,813  
United Technologies Corp., 5.70%, 4/15/40   2,500   2,610,327  
    5,403,190  
Airlines — 0.4%      
Continental Airlines Pass-Through Certificates,      
Series 2009-2, Class B, 9.25%, 5/10/17   775   829,250  
Auto Components — 0.6%      
Icahn Enterprises LP (b):      
      7.75%, 1/15/16   420   408,450  
      8.00%, 1/15/18   1,000   972,500  
    1,380,950  
Beverages — 0.4%      
Constellation Brands, Inc., 7.25%, 5/15/17   955   974,100  
Capital Markets — 1.7%      
Ameriprise Financial, Inc., 5.30%, 3/15/20   1,500   1,561,253  
Morgan Stanley, 7.30%, 5/13/19   1,950   2,141,252  
    3,702,505  
Chemicals — 0.3%      
CF Industries, Inc., 7.13%, 5/01/20   525   552,562  
Commercial Banks — 0.7%      
RESPARCS Funding LP I, 8.00% (a)(c)(d)   4,000   1,620,000  
Commercial Services & Supplies — 2.6%      
Browning-Ferris Industries, Inc., 7.40%, 9/15/35   1,824   2,081,545  
Corrections Corp.of America, 7.75%, 6/01/17   1,600   1,696,000  
Waste Management, Inc., 6.13%, 11/30/39   1,950   2,030,512  
    5,808,057  
Communications Equipment — 0.7%      
Brocade Communications Systems, Inc.,      
6.88%, 1/15/20 (b)   1,450   1,497,125  
Consumer Finance — 5.3%      
American Express Co., 8.13%, 5/20/19   1,950   2,388,343  
Capital One Bank USA NA, 8.80%, 7/15/19   1,625   1,992,651  
Inmarsat Finance Plc, 7.38%, 12/01/17 (b)   1,020   1,063,350  
SLM Corp., 4.00%, 7/25/14 (e)   6,600   6,144,534  
    11,588,878  
Containers & Packaging — 0.9%      
Ball Corp.:      
      7.13%, 9/01/16   850   903,125  
      6.75%, 9/15/20   870   889,575  
Impress Holdings BV, 3.43%, 9/15/13 (b)(e)   240   230,400  
    2,023,100  
Diversified Financial Services — 2.2%      
Bank of America Corp., 7.63%, 6/01/19   3,325   3,795,547  
GMAC, Inc., 8.30%, 2/12/15 (b)   1,000   1,043,750  
    4,839,297  
Diversified Telecommunication Services — 4.0%      
AT&T, Inc., 6.30%, 1/15/38   2,000   2,077,838  
New Communications Holdings, Inc.,      
8.50%, 4/15/20 (b)   1,500   1,545,000  
Qwest Corp., 8.38%, 5/01/16   1,360   1,550,400  
Verizon Communications, Inc., 7.35%, 4/01/39   1,950   2,315,533  

    Par    
Corporate Bonds     (000)   Value  
Diversified Telecommunication Services (concluded)        
Windstream Corp.:        
      8.63%, 8/01/16   $ 320   $ 327,600  
      7.88%, 11/01/17     900   893,250  
      8,709,621  
Electric Utilities — 1.7%        
Progress Energy Inc., 7.00%, 10/30/31     2,000   2,284,848  
Southern California Edison Co., 5.50%, 3/15/40     1,400   1,424,937  
      3,709,785  
Food & Staples Retailing — 3.4%        
CVS Caremark Corp., 6.30%, 6/01/62 (e)     3,100   2,991,500  
Wal-Mart Stores, Inc.:        
      5.25%, 9/01/35     1,850   1,821,834  
      6.20%, 4/15/38     2,500   2,752,035  
      7,565,369  
Food Products — 0.8%        
Kraft Foods, Inc.:        
      6.50%, 8/11/17     800   906,422  
      6.13%, 8/23/18     800   882,740  
      1,789,162  
Gas Utilities — 0.9%        
Nisource Finance Corp., 6.13%, 3/01/22     1,950   2,070,426  
Health Care Equipment & Supplies — 1.0%        
Medtronic, Inc.:        
      6.50%, 3/15/39     300   346,496  
      5.55%, 3/15/40     1,765   1,822,583  
      2,169,079  
Health Care Providers & Services — 3.1%        
Aetna, Inc., 6.75%, 12/15/37     1,725   1,901,110  
HCA, Inc., 7.25%, 9/15/20 (b)     1,250   1,307,813  
HCA, Inc./DE, 8.50%, 4/15/19 (b)     800   879,000  
Tenet Healthcare Corp., 10.00%, 5/01/18 (b)     745   848,369  
UnitedHealth Group, Inc., 6.88%, 2/15/38     1,725   1,895,242  
      6,831,534  
Hotels, Restaurants & Leisure — 0.0%        
Greektown Holdings, LLC, 10.75%, 12/01/13 (a)(b)(d)   362   23,982  
Insurance — 4.9%        
Lincoln National Corp.:        
      8.75%, 7/01/19     850   1,060,317  
      6.25%, 2/15/20     1,725   1,843,799  
Northwestern Mutual Life Insurance,        
6.06%, 3/30/40 (b)     1,800   1,859,173  
Principal Financial Group, Inc., 8.88%, 5/15/19     475   585,939  
Prudential Financial, Inc., 6.63%, 12/01/37     1,725   1,901,757  
QBE Insurance Group Ltd., 9.75%, 3/14/14 (b)     2,975   3,623,449  
      10,874,434  
Life Sciences Tools & Services — 1.8%        
Bio-Rad Laboratories, Inc., 8.00%, 9/15/16     1,830   1,953,525  
Life Technologies Corp., 6.00%, 3/01/20     2,000   2,104,320  
      4,057,845  
Machinery — 1.7%        
AGY Holding Corp., 11.00%, 11/15/14     390   343,200  
Ingersoll-Rand Global Holding Co., Ltd., 9.50%, 4/15/14   1,725   2,115,017  
Navistar International Corp., 8.25%, 11/01/21     1,245   1,313,475  
      3,771,692  
Media — 7.4%        
CMP Susquehanna Corp., 3.20%, 5/15/14 (a)(b)(d)     9   180  
CSC Holdings, Inc., 8.63%, 2/15/19 (b)     580   633,650  
CSC Holdings LLC, 8.50%, 6/15/15 (b)     800   852,000  
Comcast Corp., 6.30%, 11/15/17     1,725   1,911,980  
Cox Communications, Inc., 8.38%, 3/01/39 (b)     1,725   2,239,935  

See Notes to Financial Statements.

20 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust III (BPP)
(Percentages shown are based on Net Assets)

    Par    
Corporate Bonds     (000)   Value  
Media (concluded)        
DISH DBS Corp.:        
      7.00%, 10/01/13   $ 850   $ 879,750  
      7.88%, 9/01/19     550   577,500  
Intelsat Corp., 9.25%, 6/15/16     850   896,750  
News America, Inc., 6.15%, 3/01/37     2,000   2,047,648  
Time Warner Cable, Inc., 6.75%, 6/15/39     1,950   2,107,729  
Time Warner, Inc., 7.70%, 5/01/32     2,000   2,347,018  
UPC Germany GmbH, 8.13%, 12/01/17 (b)     505   515,100  
Virgin Media Secured Finance Plc, 6.50%, 1/15/18 (b)   1,300   1,306,500  
      16,315,740  
Metals & Mining — 1.2%        
Phelps Dodge Corp., 7.13%, 11/01/27     1,400   1,449,169  
Teck Resources Ltd., 10.75%, 5/15/19     850   1,058,250  
United States Steel Corp., 7.38%, 4/01/20     175   179,813  
      2,687,232  
Multi-Utilities — 1.5%        
CenterPoint Energy, Inc.:        
      5.95%, 2/01/17     1,500   1,579,578  
      6.50%, 5/01/18     1,600   1,744,266  
      3,323,844  
Multiline Retail — 0.8%        
Dollar General Corp., 10.63%, 7/15/15     1,550   1,722,437  
Oil, Gas & Consumable Fuels — 3.7%        
EXCO Resources, Inc., 7.25%, 1/15/11     40   39,950  
Enbridge Energy Partners LP, 9.88%, 3/01/19     1,000   1,323,864  
Enterprise Products Operating LLC, 6.65%, 4/15/18     2,000   2,278,896  
Kinder Morgan Energy Partners LP, 6.85%, 2/15/20     2,000   2,303,280  
ONEOK Partners LP, 8.63%, 3/01/19     1,725   2,164,941  
      8,110,931  
Paper & Forest Products — 3.1%        
Georgia-Pacific LLC, 8.25%, 5/01/16 (b)     1,635   1,790,325  
International Paper Co.:        
      7.50%, 8/15/21     1,625   1,908,740  
      8.70%, 6/15/38     900   1,152,653  
      7.30%, 11/15/39     1,725   1,912,492  
      6,764,210  
Pharmaceuticals — 7.8%        
Abbott Laboratories:        
      6.15%, 11/30/37     235   262,297  
      6.00%, 4/01/39     2,777   3,058,357  
Bristol-Myers Squibb Co.:        
      5.88%, 11/15/36     1,994   2,106,320  
      6.13%, 5/01/38     588   641,962  
Eli Lilly & Co., 5.95%, 11/15/37     588   639,820  
GlaxoSmithKline Capital, Inc., 6.38%, 5/15/38     3,460   3,917,059  
Merck & Co., Inc., 6.50%, 12/01/33     990   1,144,520  
Pfizer, Inc., 7.20%, 3/15/39     2,500   3,102,573  
Schering-Plough Corp., 6.55%, 9/15/37     1,979   2,308,828  
      17,181,736  
Professional Services — 0.0%        
FTI Consulting, Inc., 7.75%, 10/01/16     100   102,875  
Real Estate Investment Trusts (REITs) — 3.3%        
AvalonBay Communities, Inc.:        
      5.70%, 3/15/17     1,625   1,740,903  
      6.10%, 3/15/20     1,725   1,869,427  
ERP Operating LP:        
      5.38%, 8/01/16     1,625   1,713,873  
      5.75%, 6/15/17     1,715   1,839,091  
      7,163,294  

Corporate Bonds     (000)   Value  
Semiconductors & Semiconductor Equipment — 1.0%        
KLA-Tencor Corp., 6.90%, 5/01/18   $ 918   $ 1,015,167  
National Semiconductor Corp., 6.60%, 6/15/17     1,123   1,236,778  
      2,251,945  
Specialty Retail — 1.0%        
AutoNation, Inc., 6.75%, 4/15/18     940   943,525  
AutoZone, Inc., 7.13%, 8/01/18     650   751,299  
Ltd. Brands, Inc., 7.00%, 5/01/20 (g)     470   479,400  
      2,174,224  
Tobacco — 1.9%        
Altria Group, Inc.:        
9.70%, 11/10/18     1,725   2,169,345  
9.25%, 8/06/19     1,600   1,976,451  
      4,145,796  
Wireless Telecommunication Services — 0.6%        
Cricket Communications, Inc., 7.75%, 5/15/16     325   337,188  
Nextel Communications, Inc., Series E,        
6.88%, 10/31/13     1,105   1,085,662  
      1,422,850  
Total Corporate Bonds — 74.9%       165,159,057  
Investment Companies     Shares    
ProShares UltraShort Real Estate     12,000   310,080  
Total Investment Companies — 0.1%       310,080  
Preferred Securities        
    Par    
Capital Trusts     (000)    
Building Products — 0.3%        
C8 Capital SPV Ltd., 6.64% (b)(c)(e)   $ 970   707,557  
Capital Markets — 4.0%        
State Street Capital Trust III, 8.25% (c)(e)     1,385   1,422,104  
State Street Capital Trust IV, 1.26%, 6/01/67 (e)     9,675   7,457,635  
      8,879,739  
Commercial Banks — 7.8%        
Bank of Ireland Capital Funding II, LP, 5.57% (a)(b)(c)(d)(e)   854   606,340  
Bank of Ireland Capital Funding III, LP, 6.11% (a)(b)(c)(d)(e)   1,471   1,044,410  
Barclays Bank Plc, 5.93% (b)(c)(e)     890   805,450  
CBA Capital Trust I, 5.81% (b)(c)     5,000   4,943,700  
FCB/NC Capital Trust I, 8.05%, 3/01/28     1,100   1,039,309  
NBP Capital Trust III, 7.38% (c)     2,000   1,590,000  
National City Preferred Capital Trust I, 12.00% (c)(e)     600   694,452  
SunTrust Preferred Capital I, 5.85% (c)(e)     303   237,097  
USB Capital XIII Trust, 6.63%, 12/15/39     1,725   1,814,027  
Wells Fargo Capital XIII, Series GMTN, 7.70% (c)(e)     1,700   1,768,000  
Westpac Capital Trust IV, 5.26% (b)(c)(e)     3,000   2,753,040  
      17,295,825  
Diversified Financial Services — 4.7%        
JPMorgan Chase Capital XXI, Series U,        
1.29%, 1/15/87 (e)     7,125   5,542,708  
JPMorgan Chase Capital XXIII, 1.25%, 5/15/77 (e)     6,190   4,807,334  
      10,350,042  
Electric Utilities — 0.4%        
PPL Capital Funding, 6.70%, 3/30/67 (e)     900   823,500  
Insurance — 7.5%        
AXA SA, 6.38% (b)(c)(e)     900   801,000  
The Allstate Corp., 6.50%, 5/15/67 (e)     900   864,000  
Chubb Corp., 6.38%, 3/29/67 (e)     900   901,125  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

21


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust III (BPP)
(Percentages shown are based on Net Assets)

  Par    
Capital Trusts   (000)   Value  
Insurance (concluded)      
Genworth Financial, Inc., 6.15%, 11/15/66 (e)   $ 1,475   $ 1,180,000  
Liberty Mutual Group, Inc., 10.75%, 6/15/88 (b)(e)   900   1,048,500  
Lincoln National Corp., 7.00%, 5/17/66 (e)   900   832,500  
MetLife, Inc., 6.40%, 12/15/66   900   850,500  
Nationwide Life Global Funding I, 6.75%, 5/15/67   900   769,500  
Progressive Corp., 6.70%, 6/15/67 (e)   900   891,865  
Reinsurance Group of America, 6.75%, 12/15/65 (e)   1,300   1,230,830  
The Travelers Cos., Inc,, 6.25%, 3/15/67 (e)   900   885,129  
White Mountains Re Group Ltd., 7.51% (b)(c)(e)   2,600   2,388,776  
ZFS Finance (USA) (b)(e):      
      Trust IV, 5.88%, 5/09/32   190   181,522  
      Trust V, 6.50%, 5/09/67   2,209   2,115,117  
Zenith National Insurance Capital Trust I,      
8.55%, 8/01/28 (b)   1,800   1,557,000  
    16,497,364  
Multi-Utilities — 0.4%      
Puget Sound Energy, Inc., Series A, 6.97%, 6/01/67 (e)   925   879,185  
Oil, Gas & Consumable Fuels — 0.4%      
TransCanada PipeLines Ltd., 6.35%, 5/15/67 (e)   900   865,478  
Total Capital Trusts — 25.5%     56,298,690  
Preferred Stocks   Shares    
Capital Markets — 0.0%      
Lehman Brothers Holdings Inc., Series D, 5.67% (c)(d)   31,100   2,519  
Commercial Banks — 2.5%      
Banesto Holdings, Ltd., Series A, 10.50% (b)   30,000   754,689  
First Republic Preferred Capital Corp., 7.25%   42,512   885,100  
Royal Bank of Scotland Group Plc, Series M, 6.40%   10,000   133,400  
Union Planter Preferred Funding Corp., 7.75%   60   3,780,000  
    5,553,189  
Diversified Financial Services — 1.7%      
JPMorgan Chase & Co., Series E, 6.15%   75,000   3,728,250  
Electric Utilities — 0.6%      
Alabama Power Co., 6.50%   50,000   1,299,500  
Insurance — 10.2%      
Arch Capital Group Ltd., Series A, 8.00%   67,414   1,701,529  
Aspen Insurance Holdings Ltd., 7.40% (e)   115,000   2,668,000  
Endurance Specialty Holdings Ltd., Series A, 7.75%   122,400   2,970,648  
MetLife, Inc., Series B, 6.50%   61,294   1,485,154  
PartnerRe Ltd., Series C, 6.75%   209,400   5,182,650  
Prudential Plc:      
      6.50%   62,000   1,434,060  
      6.50% (c)   6,000,000   5,235,000  
Zurich RegCaPS Funding Trust II, 6.58% (b)(e)   2,000   1,852,500  
    22,529,541  
Media — 1.5%      
CMP Susquehanna Radio Holdings Corp. (a)(b)(e)   2,052    
Comcast Holdings Corp., 2.00%, 11/15/29 (f)   110   3,340,068  
    3,340,068  
Real Estate Investment Trusts (REITs) — 2.2%      
BRE Properties, Inc., Series D, 6.75%   20,000   456,400  
Public Storage:      
      Series F, 6.45%   20,000   470,800  
      Series M, 6.63%   35,000   860,300  
SunTrust Real Estate Investment Trust, 9.00%   30   3,027,187  
    4,814,687  
Specialty Retail — 0.1%      
Lazydays RV Center, Inc., 8.00%   182   181,809  
Total Preferred Stocks — 18.8%     41,449,563  

Trust Preferreds   Shares   Value  
Capital Markets — 1.1%      
Structured Asset Trust Unit Repackagings (SATURNS):      
      Credit Suisse First Boston (USA), Inc. Debenture      
      Backed, 6.25%, 7/15/32   11,100   $ 249,903  
      Goldman Sachs Group, Inc. Debenture Backed,      
      6.00%, 2/15/33   102,900   2,097,199  
    2,347,102  
Diversified Financial Services — 0.1%      
PPLUS Trust Certificates, Series VAL-1, Class A,      
  7.25%, 4/15/32 (f)   11,100   276,510  
Food Products — 1.1%      
Corporate-Backed Trust Certificates, Kraft      
  Foods, Inc. Debenture Backed, Series 2003-11,      
  5.88%, 11/01/31   100,000   2,401,202  
Insurance — 1.1%      
Assured Guaranty Municipal Holdings, Inc.,      
  5.60%, 7/15/03 (f)   15,200   279,692  
Everest Re Capital Trust, 6.20%, 3/29/34   30,000   642,884  
The Phoenix Cos., Inc., 7.45%, 1/15/32   79,385   1,552,604  
    2,475,180  
Media — 1.4%      
Comcast Corp.:      
      7.00%, 9/15/55   50,000   1,251,825  
      6.63%, 5/15/56   73,000   1,772,135  
Corporate-Backed Trust Certificates, News      
  America Debenture Backed, Series 2002-9,      
  8.13%, 12/01/45 (f)   7,200   180,197  
    3,204,157  
Oil, Gas & Consumable Fuels — 1.7%      
Nexen, Inc., 7.35%, 11/01/43   155,000   3,834,702  
Wireless Telecommunication Services — 0.9%      
Structured Repackaged Asset-Backed Trust      
  Securities, Sprint Capital Corp. Debenture Backed,      
  Series 2004-2, 6.50%, 11/15/28   103,439   1,892,041  
Total Trust Preferreds — 7.4%     16,430,894  
Total Preferred Securities — 51.7%     114,179,147  
  Par    
Taxable Municipal Bonds   (000)    
Metropolitan Transportation Authority, RB, Build      
  America Bonds, 6.55%, 11/15/31   $ 1,675   1,765,952  
State of California, GO, Build America Bonds,      
  7.35%, 11/01/39   825   891,314  
State of Illinois, GO, Pension, 5.10%, 6/01/33   1,675   1,444,738  
Total Taxable Municipal Bonds — 1.9%     4,102,004  
Warrants (h)   Shares    
Media — 0.0%      
CMP Susquehanna Radio Holdings Corp.      
  (Expires 3/26/19) (b)   2,345    
Total Warrants — 0.0%      
Total Long Term Investments      
(Cost — $295,822,018) — 128.6%     283,783,732  

See Notes to Financial Statements.

22 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust III (BPP)
(Percentages shown are based on Net Assets)

Short-Term Securities   Shares   Value  
BlackRock Liquidity Funds, TempFund,      
Institutional Class, 0.13% (i)(j)   6,947,057   $ 6,947,057  
Total Short-Term Securities      
(Cost — $6,947,057) — 3.2%     6,947,057  
Total Investments (Cost — $302,769,075*) — 131.8%     290,730,789  
Other Assets Less Liabilities — 0.1%     300,013  
Preferred Shares, at Redemption Value — (31.9)%     (70,427,782)  
Net Assets Applicable to Common Shares — 100.0%     $ 220,603,020  

* The cost and unrealized appreciation (depreciation) of investments as of April 30,
2010, as computed for federal income tax purposes, were as follows:

Aggregate cost   $ 304,317,602  
Gross unrealized appreciation   $ 8,338,212  
Gross unrealized depreciation   (21,925,025)  
Net unrealized depreciation   $ (13,586,813)  

(a) Non-income producing security.
(b) Security exempt from registration under Rule 144A of the Securities Act of 1933.
These securities may be resold in transactions exempt from registration to qualified
institutional investors.
(c) Security is perpetual in nature and has no stated maturity date.
(d) Issuer filed for bankruptcy and/or is in default of interest payments.
(e) Variable rate security. Rate shown is as of report date.
(f) Convertible security.
(g) When-issued security. Unsettled when-issued transactions were as follows:

    Unrealized  
Counterparty   Value   Appreciation  
Bank of America, NA   $ 479,400   $ 9,400  

(h) Warrants entitle the Fund to purchase a predetermined number of shares of com-
mon stock and are non-income producing. The purchase price and number of
shares are subject to adjustment under certain conditions until the expiration date.
(i) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

      Shares Held at           Shares Held at  
      October 31,   Net       April 30,    
  Affiliate       2009     Activity   2010   Income  
  BlackRock Liquidity              
    Funds, TempFund,              
    Institutional Class                                        51,450,797            (44,503,740) 6,947,057   $40,567  
(j) Represents the current yield as of report date.      
  For Fund compliance purposes, the Fund’s industry classifications refer to any one  
  or more of the industry sub-classifications used by one or more widely recognized  
  market indexes or rating group indexes, and/or as defined by Fund management.  
  This definition may not apply for purposes of this report, which may combine  
  industry sub-classifications for reporting ease.      
  Financial futures contracts purchased as of April 30, 2010 were as follows:  
        Expiration   Notional   Unrealized  
  Contracts   Issue   Date   Value   Appreciation  
     13   30-Year U.S.            
                                           Treasury Bond   June 2010   $ 1,505,693   $ 42,120  
  Credit default swaps on single-name issues — buy protection outstanding as of  
  April 30, 2010 were as follows:          
                Received         Notional    
      Fixed   Counter-     Amount   Unrealized  
  Issuer     Rate          party            Expiration   (000)   Depreciation  
  Nordstrom, Inc     5.20%   Deutsche   June      
        Bank AG   2014   $1,000   $ (175,919)  

Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices
for similar assets or liabilities in markets that are active, quoted prices for
identical or similar assets or liabilities in markets that are not active, inputs
other than quoted prices that are observable for the assets or liabilities (such
as interest rates, yield curves, volatilities, prepayment speeds, loss severities,
credit risks and default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an
indication of the risk associated with investing in those securities. For information
about the Fund’s policy regarding valuation of investments and other significant
accounting policies, please refer to Note 1 of the Notes to Financial Statements.
The following tables summarize the inputs used as of April 30, 2010 in determin-
ing the fair valuation of the Fund’s investments:

Investments in Securities

Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets:            
Long-Term            
Investments:            
    Capital            
    Trusts       $ 56,298,690     $ 56,298,690  
    Common            
    Stocks         $ 33,444   33,444  
    Corporate            
    Bonds       165,158,877   180   165,159,057  
    Investment            
    Companies .$   310,080       310,080  
    Preferred            
    Stocks   23,278,310   14,962,257   3,208,996   41,449,563  
    Taxable            
    Municipal            
    Bonds       4,102,004     4,102,004  
    Trust            
    Preferreds   16,151,202   279,692     16,430,894  
Short-Term            
Securities     6,947,057       6,947,057  
Total   $46,686,649   $240,801,520   $ 3,242,620   $290,730,789  
Other Financial Instruments 1

Valuation Inputs   Level 1   Level 2 1   Level 3   Total  
Assets   $ 42,120       $ 42,120  
Liabilities       $ (175,919)     (175,919)  
Total   $ 42,120   $ (175,919)     $ (133,799)  

1 Other financial instruments are financial futures contracts and swaps, which are
shown at the unrealized appreciation/depreciation on the instrument.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

23


Schedule of Investments (concluded)

BlackRock Credit Allocation Income Trust III (BPP)

The following table is a reconciliation of Level 3 investments for which significant unobservable inputs were used to determine fair value:

    Investments in Securities    
  Common   Corporate   Preferred    
  Stocks     Bonds   Stocks   Total  
Balance, as of October 31, 2009     $ 12,000   $ 3,027,189   $ 3,039,189  
Accrued discounts/premiums          
Net realized gain (loss)          
Net change in unrealized appreciation/depreciation 1       (2)   (2)  
Net purchases (sales)   $ 33,444   (11,820)   181,809   203,433  
Net transfers in/out          
Balance, as of April 30, 2010   $ 33,444   $ 180   $ 3,208,996   $ 3,242,620  

1 Included in the related net change in unrealized appreciation/depreciation on the Statements of Operations. The change in unrealized appreciation/depreciation on securities
still held at April 30, 2010 was $(2).

See Notes to Financial Statements.

24 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments April 30, 2010 (Unaudited)

BlackRock Credit Allocation Income Trust IV (BTZ)
(Percentages shown are based on Net Assets)

Common Stocks   Shares   Value  
Commercial Banks — 1.1%      
Citizens Banking Corp. (a)   6,406,596   $ 8,008,245  
Total Common Stocks — 1.1%     8,008,245  
  Par    
Corporate Bonds   (000)    
Aerospace & Defense — 2.6%      
BE Aerospace, Inc., 8.50%, 7/01/18   $ 3,575   3,825,250  
Bombardier, Inc., 7.75%, 3/15/20 (b)   4,500   4,781,250  
United Technologies Corp., 5.70%, 4/15/40   10,000   10,441,310  
    19,047,810  
Airlines — 0.3%      
Continental Airlines Pass-Through Certificates,      
Series 2009-2, Class B, 9.25%, 5/10/17   2,225   2,380,750  
Auto Components — 0.6%      
Icahn Enterprises LP (b):      
      7.75%, 1/15/16   1,700   1,653,250  
      8.00%, 1/15/18   2,500   2,431,250  
    4,084,500  
Beverages — 0.5%      
Constellation Brands, Inc., 7.25%, 5/15/17   3,230   3,294,600  
Capital Markets — 1.4%      
Ameriprise Financial, Inc., 5.30%, 3/15/20   4,500   4,683,757  
Lehman Brothers Holdings, Inc. (a)(c):      
      3.95%, 11/10/09   105   23,100  
      4.38%, 11/30/10   325   71,500  
Morgan Stanley, 7.30%, 5/13/19   4,750   5,215,870  
    9,994,227  
Chemicals — 0.3%      
CF Industries, Inc., 7.13%, 5/01/20   1,850   1,947,125  
Commercial Banks — 0.1%      
Kazkommerts Finance 2 BV, 9.20%, (d)(e)   500   430,000  
Commercial Services & Supplies — 2.1%      
Browning-Ferris Industries, Inc., 7.40%, 9/15/35   4,420   5,044,095  
Corrections Corp.of America, 7.75%, 6/01/17   4,835   5,125,100  
Waste Management, Inc., 6.13%, 11/30/39   4,750   4,946,118  
    15,115,313  
Communications Equipment — 0.5%      
Brocade Communications Systems, Inc.,      
6.88%, 1/15/20 (b)   3,580   3,696,350  
Consumer Finance — 4.0%      
American Express Co., 8.13%, 5/20/19   4,725   5,787,137  
Capital One Bank USA NA, 8.80%, 7/15/19   3,950   4,843,676  
Inmarsat Finance Plc, 7.38%, 12/01/17 (b)   2,975   3,101,438  
SLM Corp., 4.00%, 7/25/14 (e)   16,300   15,175,137  
    28,907,388  
Containers & Packaging — 0.7%      
Ball Corp.:      
      7.13%, 9/01/16   2,000   2,125,000  
      6.75%, 9/15/20   2,750   2,811,875  
    4,936,875  
Diversified Financial Services — 3.0%      
Bank of America Corp., 7.63%, 6/01/19   8,025   9,160,682  
GMAC, Inc., 8.30%, 2/12/15 (b)   3,700   3,861,875  
ING Groep NV, 5.78% (d)(e)(f)   10,000   8,629,300  
Stan IV Ltd., 2.14%, 7/20/11 (e)   283   240,550  
    21,892,407  

  Par    
Corporate Bonds   (000)   Value  
Diversified Telecommunication Services — 3.2%      
AT&T, Inc., 6.30%, 1/15/38   $ 5,000   $ 5,194,595  
New Communications Holdings, Inc.,      
8.50%, 4/15/20 (b)   4,500   4,635,000  
Qwest Corp., 8.38%, 5/01/16   3,285   3,744,900  
Verizon Communications, Inc., 7.35%, 4/01/39   4,700   5,581,029  
Windstream Corp.:      
      8.63%, 8/01/16   1,250   1,279,688  
      7.88%, 11/01/17   2,700   2,679,750  
    23,114,962  
Electric Utilities — 1.3%      
Progress Energy Inc., 7.00%, 10/30/31   5,000   5,712,120  
Southern California Edison Co., 5.50%, 3/15/40   3,850   3,918,576  
    9,630,696  
Food & Staples Retailing — 2.9%      
CVS Caremark Corp., 6.30%, 6/01/62 (e)   7,800   7,527,000  
Wal-Mart Stores, Inc.:      
      5.25%, 9/01/35   2,650   2,609,654  
      6.20%, 4/15/38   10,000   11,008,140  
    21,144,794  
Food Products — 0.6%      
Kraft Foods, Inc.:      
      6.50%, 8/11/17   1,985   2,249,058  
      6.13%, 8/23/18   1,990   2,195,816  
    4,444,874  
Gas Utilities — 0.7%      
Nisource Finance Corp., 6.13%, 3/01/22   4,750   5,043,346  
Health Care Equipment & Supplies — 1.2%      
Medtronic, Inc.:      
      6.50%, 3/15/39   1,050   1,212,734  
      5.55%, 3/15/40   7,058   7,288,268  
    8,501,002  
Health Care Providers & Services — 2.4%      
Aetna, Inc., 6.75%, 12/15/37   4,075   4,491,029  
HCA, Inc., 7.25%, 9/15/20 (b)   3,600   3,766,500  
HCA, Inc./DE, 8.50%, 4/15/19 (b)   2,000   2,197,500  
Tenet Healthcare Corp., 10.00%, 5/01/18 (b)   2,175   2,476,781  
UnitedHealth Group, Inc., 6.88%, 2/15/38   4,075   4,477,166  
    17,408,976  
IT Services — 0.6%      
International Business Machines Corp.,      
5.60%, 11/30/39   4,400   4,575,644  
Insurance — 3.4%      
Lincoln National Corp.:      
      8.75%, 7/01/19   2,000   2,494,864  
      6.25%, 2/15/20   4,075   4,355,641  
Northwestern Mutual Life Insurance,      
6.06%, 3/30/40 (b)   5,500   5,680,807  
Principal Financial Group, Inc., 8.88%, 5/15/19   1,145   1,412,421  
Prudential Financial, Inc., 6.63%, 12/01/37   4,075   4,492,557  
QBE Insurance Group Ltd., 9.75%, 3/14/14 (b)   4,973   6,056,945  
    24,493,235  
Life Sciences Tools & Services — 1.5%      
Bio-Rad Laboratories, Inc., 8.00%, 9/15/16   5,480   5,849,900  
Life Technologies Corp., 6.00%, 3/01/20   4,800   5,050,368  
    10,900,268  
Machinery — 1.3%      
Ingersoll-Rand Global Holding Co LTD, 9.50%, 4/15/14   4,075   4,996,345  
Navistar International Corp., 8.25%, 11/01/21   3,975   4,193,625  
    9,189,970  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

25


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust IV (BTZ)
(Percentages shown are based on Net Assets)

  Par    
Corporate Bonds   (000)   Value  
Media — 5.6%      
CSC Holdings LLC, 8.50%, 6/15/15 (b)   $ 2,300   $ 2,449,500  
CSC Holdings, Inc., 8.63%, 2/15/19 (b)   1,950   2,130,375  
Comcast Corp., 6.30%, 11/15/17   4,075   4,516,706  
Cox Communications, Inc., 8.38%, 3/01/39 (b)   4,075   5,291,440  
DISH DBS Corp:      
      7.00%, 10/01/13   1,950   2,018,250  
      7.88%, 9/01/19   1,850   1,942,500  
Intelsat Corp., 9.25%, 6/15/16   2,000   2,110,000  
News America, Inc., 6.15%, 3/01/37   4,850   4,965,546  
Time Warner Cable, Inc., 6.75%, 6/15/39   4,675   5,053,147  
Time Warner, Inc., 7.70%, 5/01/32   4,900   5,750,194  
UPC Germany GmbH, 8.13%, 12/01/17 (b)   1,225   1,249,500  
Virgin Media Secured Finance Plc, 6.50%, 1/15/18 (b)   3,175   3,190,875  
    40,668,033  
Metals & Mining — 0.9%      
Aleris International, Inc., 10.00%, 12/15/16 (a)(c)   5,000   25,000  
Phelps Dodge Corp., 7.13%, 11/01/27   3,500   3,622,924  
Teck Resources Ltd., 10.75%, 5/15/19   2,000   2,490,000  
United States Steel Corp., 7.38%, 4/01/20   550   565,125  
    6,703,049  
Multi-Utilities — 2.5%      
CenterPoint Energy, Inc.:      
      5.95%, 2/01/17   3,600   3,790,987  
      6.50%, 5/01/18   3,950   4,306,156  
Dominion Resources, Inc., 8.88%, 1/15/19   8,000   10,286,944  
    18,384,087  
Multiline Retail — 0.7%      
Dollar General Corp., 10.63%, 7/15/15   4,225   4,695,031  
Oil, Gas & Consumable Fuels — 2.7%      
Enbridge Energy Partners LP, 9.88%, 3/01/19   2,425   3,210,370  
Enterprise Products Operating LLC, 6.65%, 4/15/18   4,800   5,469,350  
Kinder Morgan Energy Partners LP, 6.85%, 2/15/20   4,800   5,527,872  
ONEOK Partners LP, 8.63%, 3/01/19   4,075   5,114,280  
    19,321,872  
Paper & Forest Products — 2.4%      
Georgia-Pacific LLC, 8.25%, 5/01/16 (b)   3,955   4,330,725  
International Paper Co.:      
      7.50%, 8/15/21   3,950   4,639,705  
      8.70%, 6/15/38   3,100   3,970,251  
      7.30%, 11/15/39   4,075   4,517,916  
    17,458,597  
Pharmaceuticals — 8.3%      
Abbott Laboratories:      
      6.15%, 11/30/37   942   1,051,422  
      6.00%, 4/01/39   9,405   10,357,886  
Bristol-Myers Squibb Co.:      
      5.88%, 11/15/36   8,015   8,466,477  
      6.13%, 5/01/38   2,353   2,568,939  
Eli Lilly & Co., 5.95%, 11/15/37   2,353   2,560,368  
GlaxoSmithKline Capital, Inc., 6.38%, 5/15/38   10,100   11,434,190  
Merck & Co., Inc., 6.50%, 12/01/33   2,885   3,335,294  
Pfizer, Inc., 7.20%, 3/15/39   10,000   12,410,290  
Schering-Plough Corp., 6.55%, 9/15/37   6,945   8,102,481  
    60,287,347  
Real Estate Investment Trusts (REITs) — 2.4%      
AvalonBay Communities, Inc.:      
      5.70%, 3/15/17   3,925   4,204,951  
      6.10%, 3/15/20   4,075   4,416,183  
ERP Operating LP:      
      5.38%, 8/01/16   3,925   4,139,662  
      5.75%, 6/15/17   4,080   4,375,213  
    17,136,009  

    Par    
Corporate Bonds     (000)   Value  
Semiconductors & Semiconductor Equipment — 3.1%        
KLA-Tencor Corp., 6.90%, 5/01/18   $ 2,208   $ 2,441,710  
National Semiconductor Corp.:        
      3.95%, 4/15/15     16,750   16,756,851  
      6.60%, 6/15/17     2,770   3,050,645  
      22,249,206  
Specialty Retail — 0.8%        
AutoNation, Inc., 6.75%, 4/15/18     2,775   2,785,406  
AutoZone, Inc., 7.13%, 8/01/18     1,550   1,791,558  
Ltd. Brands, Inc., 7.00%, 5/01/20 (g)     1,370   1,397,400  
      5,974,364  
Tobacco — 1.4%        
Altria Group, Inc.:        
      9.70%, 11/10/18     4,075   5,124,683  
      9.25%, 8/06/19     3,950   4,879,364  
      10,004,047  
Wireless Telecommunication Services — 3.5%        
Cricket Communications, Inc., 7.75%, 5/15/16     780   809,250  
Nextel Communications, Inc., Series E,        
6.88%, 10/31/13     2,890   2,839,425  
SBA Tower Trust, 5.10%, 4/15/42 (b)     21,250   21,887,617  
      25,536,292  
Total Corporate Bonds — 69.5%       502,593,046  
Investment Companies     Shares    
ProShares UltraShort Real Estate     30,000   775,200  
Total Investment Companies — 0.1%       775,200  
Preferred Securities        
    Par    
Capital Trusts     (000)    
Building Products — 0.6%        
C10 Capital SPV Ltd., 6.72% (b)(d)(e)   $ 5,000   3,655,700  
C8 Capital SPV Ltd., 6.64% (b)(d)(e)     1,580   1,152,515  
      4,808,215  
Capital Markets — 3.1%        
Credit Suisse Guernsey Ltd., 5.86% (d)(e)     1,050   990,937  
State Street Capital Trust III, 8.25% (d)(e)     1,740   1,786,615  
State Street Capital Trust IV, 1.26%, 6/01/67 (e)     25,245   19,459,225  
      22,236,777  
Commercial Banks — 14.2%        
BB&T Capital Trust IV, 6.82%, 6/12/77 (e)(f)     15,300   14,688,000  
Bank of Ireland Capital Funding II, LP, 5.57% (a)(b)(c)(d)(e)   1,422   1,009,620  
Bank of Ireland Capital Funding III, LP, 6.11% (a)(b)(c)(d)(e)   9,153   6,498,630  
Barclays Bank Plc (b)(d)(e):        
      5.93%     4,000   3,620,000  
      6.86%     11,500   10,522,500  
Commonwealth Bank of Australia, 6.02% (b)(d)(e)     20,000   19,073,160  
HSBC Capital Funding LP/Jersey Channel Islands,        
10.18% (b)(d)(e)     7,000   8,953,000  
Lloyds Banking Group Plc, 6.66% (b)(d)(e)     10,000   6,600,000  
National City Preferred Capital Trust I, 12.00% (d)(e)     3,713   4,297,500  
Shinsei Finance II (Cayman) Ltd., 7.16% (b)(d)(e)     1,005   775,421  
Standard Chartered Bank, 7.01% (b)(d)(e)     5,000   4,692,115  
USB Capital XIII Trust, 6.63%, 12/15/39     4,100   4,311,601  
Wells Fargo & Co., Series K, 7.98% (d)(e)     12,985   13,699,175  
Wells Fargo Capital XIII, Series GMTN, 7.70% (d)(e)     3,900   4,056,000  
      102,796,722  

See Notes to Financial Statements.

26 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust IV (BTZ)
(Percentages shown are based on Net Assets)

  Par    
Capital Trusts   (000)   Value  
Diversified Financial Services — 3.6%      
JPMorgan Chase Capital XXI, Series U,      
1.29%, 1/15/87 (e)(f)   $ 12,875   $ 10,015,772  
JPMorgan Chase Capital XXIII, 1.25%, 5/15/77 (e)(f)   20,695   16,072,337  
    26,088,109  
Electric Utilities — 0.5%      
PPL Capital Funding, 6.70%, 3/30/67 (e)   3,900   3,568,500  
Insurance — 10.6%      
AXA SA, 6.46% (b)(d)(e)   12,000   10,680,000  
Ace Capital Trust II, 9.70%, 4/01/30 (f)   4,000   4,855,256  
The Allstate Corp. 6.50%, 5/15/67 (e)   4,000   3,840,000  
Aon Corp., 8.21%, 1/01/27   4,000   4,358,024  
Chubb Corp., 6.38%, 3/29/67 (e)(f)   4,000   4,005,000  
Liberty Mutual Group, Inc., 10.75%, 6/15/88 (b)(e)   4,000   4,660,000  
Lincoln National Corp., 7.00%, 5/17/66 (e)   4,255   3,935,875  
MetLife, Inc., 6.40%, 12/15/66   4,550   4,299,750  
Nationwide Life Global Funding I, 6.75%, 5/15/67   4,000   3,420,000  
Progressive Corp., 6.70%, 6/15/67 (e)(f)   4,000   3,963,844  
Reinsurance Group of America, 6.75%, 12/15/65 (e)(f)   15,000   14,201,880  
Swiss Re Capital I LP, 6.85% (b)(d)(e)   3,000   2,784,270  
The Travelers Cos., Inc., 6.25%, 3/15/67 (e)(f)   4,000   3,933,908  
White Mountains Re Group Ltd., 7.51% (b)(d)(e)   4,400   4,042,544  
ZFS Finance (USA) (b)(e):      
      Trust IV, 5.88%, 5/09/32   599   572,273  
      Trust V, 6.50%, 5/09/67   3,331   3,189,432  
    76,742,056  
Multi-Utilities — 0.2%      
Puget Sound Energy, Inc., Series A, 6.97%, 6/01/67 (e)   1,575   1,496,990  
Oil, Gas & Consumable Fuels — 1.2%      
Enterprise Products Operating LLC, 8.38%, 8/01/66 (e)   4,500   4,680,000  
TransCanada PipeLines Ltd., 6.35%, 5/15/67 (e)(f)   4,000   3,846,568  
    8,526,568  
Real Estate Investment Trusts (REITs) — 1.5%      
Sovereign Real Estate Investment Corp., 12.00% (d)   10   10,900,000  
Total Capital Trusts — 35.5%     257,163,937  
Preferred Stocks   Shares    
Commercial Banks — 0.0%      
Royal Bank of Scotland Group Plc, Series M, 6.40%   15,000   200,100  
Diversified Financial Services — 0.9%      
Falcons Funding Trust I, 8.88% (b)(e)   5,650   5,634,110  
ING Groep NV:      
      7.05%   5,800   115,420  
      7.38%   40,000   818,353  
    6,567,883  
Diversified Telecommunication Services — 0.1%      
AT&T, Inc., 6.38%   750,000   790,563  
Electric Utilities — 4.1%      
Alabama Power Co., 6.50%   100,000   2,599,000  
Entergy Louisiana LLC, 6.95%   40,000   3,913,549  
Interstate Power & Light Co., Series B, 8.38%   785,000   22,945,550  
    29,458,099  
Insurance — 7.0%      
Arch Capital Group Ltd., Series A, 8.00%   100,000   2,524,000  
Aspen Insurance Holdings Ltd., 7.40% (e)   655,000   15,196,000  
Axis Capital Holdings Ltd., Series B, 7.50% (e)   180,000   17,010,000  
Endurance Specialty Holdings Ltd., Series A, 7.75%   369,000   8,955,630  
PartnerRe Ltd., Series C, 6.75%   265,600   6,573,600  
    50,259,230  

Preferred Stocks     Shares   Value  
Real Estate Investment Trusts (REITs) — 0.5%        
BRE Properties, Inc., Series D, 6.75%     30,000   $ 684,600  
iStar Financial, Inc., Series I, 7.50%     55,000   880,000  
Public Storage:        
Series F, 6.45%     30,000   706,200  
Series M, 6.63%     55,000   1,351,900  
      3,622,700  
Wireless Telecommunication Services — 1.5%        
Centaur Funding Corp., 9.08%     10,000   11,003,125  
Total Preferred Stocks — 14.1%       101,901,700  
Trust Preferreds        
Capital Markets — 0.0%        
Credit Suisse Guernsey Ltd., 7.90%, (d)     10,000   255,424  
Insurance — 0.6%        
W.R. Berkley Capital Trust II, 6.75%, 7/26/45     170,731   4,204,463  
Media — 1.5%        
Comcast Corp., 6.63%, 5/15/56     447,000   10,818,022  
Oil, Gas & Consumable Fuels — 0.4%        
Nexen, Inc., 7.35%, 11/01/43     120,000   2,968,802  
Total Trust Preferreds — 2.5%       18,246,711  
Total Preferred Securities — 52.1%       377,312,348  
    Par    
Taxable Municipal Bonds     (000)    
City of Chicago Illinois, RB, Build America Bonds,        
  6.85%, 1/01/38   $ 5,000   5,187,200  
Metropolitan Transportation Authority, RB,        
  Build America Bonds, 6.55%, 11/15/31     4,075   4,296,272  
State of California, GO, Build America Bonds,        
  7.35%, 11/01/39     2,050   2,214,779  
State of Illinois, GO, Pension, 5.10%, 6/01/33     4,075   3,514,810  
Total Taxable Municipal Bonds — 2.1%       15,213,061  
U.S. Treasury Obligations        
U.S. Treasury Notes, 4.63%, 2/15/40 (h)     75,000   76,183,575  
Total U.S. Treasury Obligations — 10.5%       76,183,575  
Total Long-Term Investments        
(Cost — $1,003,236,130) — 135.4%       980,085,475  
Short-Term Securities     Shares    
BlackRock Liquidity Funds, TempFund        
  Institutional Class, 0.13% (i)(j)   41,474,360   41,474,360  
Total Short-Term Securities        
(Cost — $41,474,360) — 5.7%       41,474,360  
Total Investments (Cost — $1,044,710,490*) — 141.1%     1,021,559,835  
Liabilities in Excess of Other Assets — (9.2)%       (66,648,040)  
Preferred Shares at Redemption Value — (31.9)%       (231,045,162)  
Net Assets Applicable to Common Shares — 100.0%       $ 723,866,633  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

27


Schedule of Investments (continued)

BlackRock Credit Allocation Income Trust IV (BTZ)

* The cost and unrealized appreciation (depreciation) of investments as of April 30,
2010, as computed for federal income tax purposes, were as follows:

Aggregate cost   $1,057,868,824  
Gross unrealized appreciation   $ 29,341,029  
Gross unrealized depreciation   (65,650,018)  
Net unrealized depreciation   $ (36,308,989)  

(a) Non-income producing security.
(b) Security exempt from registration under Rule 144A of the Securities Act of 1933.
These securities may be resold in transactions exempt from registration to qualified
institutional investors.
(c) Issuer filed for bankruptcy and/or is in default of interest payments.
(d) Security is perpetual in nature and has no stated maturity date.
(e) Variable rate security. Rate shown is as of report date.
(f) All or a portion of security has been pledged as collateral in connection with open
reverse repurchase agreements.
(g) When-issued security. Unsettled when-issued transactions were as follows:

    Unrealized  
Counterparty   Value   Appreciation  
Bank of America, NA   $1,397,400   $ 27,400  

(h) All or portion of security has been pledged as collateral in connection with open
financial futures contracts.
(i) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

        Shares Held at       Shares Held at  
        October 31,   Net             April 30,    
  Affiliate         2009   Activity     2010   Income  
  BlackRock Liquidity                
    Funds, TempFund                
    Institutional Class   267,832,781     (226,358,421)         41,474,360             $ 160,242      
(j) Represents the current yield as of report date.          
  For Fund compliance purposes, the Fund’s industry classifications refer to any one  
  or more of the industry sub-classifications used by one or more widely recognized  
  market indexes or rating group indexes, and/or as defined by Fund management.  
  This definition may not apply for purposes of this report, which may combine indus-  
  try sub-classifications for reporting ease.            
  Reverse repurchase agreements outstanding as of April 30, 2010 were as follows:  
      Interest   Trade   Maturity       Net Closing   Face  
  Counterparty     Rate   Date   Date       Amount      Amount  
  Credit Suisse                    
  International   0.38%   4/22/10   5/24/10     $68,676,775   $68,653,890  
  Financial futures contracts purchased as of April 30, 2010 were as follows:  
          Expiration     Notional   Unrealized  
  Contracts     Issue   Date       Value      Appreciation  
  380     10-Year US              
    Treasury Bond   June 2010   $44,273,953   $ 530,422  
  32     30-Year US              
    Treasury Bond   June 2010   $ 3,706,320   103,680  
  Total                   $ 634,102  
  Credit default swaps on single-name issues — buy protection outstanding as of  
  April 30, 2010 were as follows:            
        Pay           Notional    
        Fixed     Counter-         Amount   Unrealized  
  Issuer       Rate   party   Expiration    (000)   Depreciation  
  Nordstrom, Inc.     5.20%     Deutsche   June          
              Bank AG   2014       $4,000   $ (703,674)  

Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an
indication of the risk associated with investing in those securities. For information
about the Fund’s policy regarding valuation of investments and other significant
accounting policies, please refer to Note 1 of the Notes to Financial Statements.
The following tables summarize the inputs used as of April 30, 2010 in determining
the fair valuation of the Fund’s investments:

Investments in Securities

Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets:            
Long-Term            
Investments:            
    Capital            
    Trusts       $257,163,937     $ 257,163,937  
    Common            
    Stocks   $ 8,008,245       8,008,245  
    Corporate            
    Bonds       502,352,496 $   240,550   502,593,046  
    Investment            
    Companies .     775,200       775,200  
    Preferred            
    Stocks     64,340,916   37,560,784     101,901,700  
    Taxable            
    Municipal            
    Bonds       15,213,061     15,213,061  
    Trust            
    Preferreds     18,246,711       18,246,711  
    U.S. Treasury            
    Obligations .       76,183,575     76,183,575  
Short-Term            
Securities     41,474,360       41,474,360  
Total   $132,845,432   $888,473,853 $   240,550   $1,021,559,835  
Other Financial Instruments 1

Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets   $ 634,102       $ 634,102  
Liabilities       $ (703,674)     (703,674)  
Total   $ 634,102   $ (703,674)     $ (69,572)  

1 Other financial instruments are financial futures contracts and swaps, which are
shown at the unrealized appreciation/depreciation on the instrument.

See Notes to Financial Statements.

28 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (concluded)

BlackRock Credit Allocation Income Trust IV (BTZ)

The following table is a reconciliation of Level 3 investments for which significant
unobservable inputs were used to determine fair value:

Investments in Securities    
  Corporate  
  Bonds  
Balance, as of October 31, 2009   $ 240,550  
Accrued discounts/premiums    
Net realized gain (loss)    
Net change in unrealized appreciation/depreciation 1    
Net purchases (sales)    
Net transfers in/out    
Balance, as of April 30, 2010   $ 240,550  

1 Included in the related net change in unrealized appreciation/depreciation on
the Statements of Operations. The change in unrealized appreciation/deprecia-
tion on securities still held at April 30, 2010 was $0.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

29


Schedule of Investments April 30, 2010 (Unaudited)

BlackRock Floating Rate Income Trust (BGT)
(Percentages shown are based on Net Assets)

Common Stocks     Shares             Value  
Chemicals — 0.0%        
British Vita Holding Co. (a)(b)     166   $ 5,526  
Commercial Services & Supplies — 0.0%        
SIRVA (b)     554   5,540  
Construction & Engineering — 0.0%        
USI United Subcontractors Common (b)     7,644   99,379  
Metals & Mining — 0.1%        
Euramax International (b)     1,135   181,632  
Paper & Forest Products — 0.2%        
Ainsworth Lumber Co. Ltd. (a)(b)     62,685   277,695  
Ainsworth Lumber Co. Ltd. (b)     55,855   247,438  
      525,133  
Software — 0.3%        
HMH Holdings/EduMedia   154,601   1,082,207  
Specialty Retail — 0.0%        
Lazydays RV Center, Inc. (b)     2,721   10,610  
Total Common Stocks — 0.6%       1,910,027  
    Par    
Corporate Bonds     (000)    
Auto Components — 1.0%        
Delphi International Holdings Unsecured,        
12.00%, 10/06/14   USD   39   38,768  
Icahn Enterprises LP (a):        
      7.75%, 1/15/16     1,125   1,094,062  
      8.00%, 1/15/18     2,250   2,188,125  
      3,320,955  
Beverages — 0.5%        
Central European Distribution Corp., 2.62%, 5/15/14   EUR   1,500   1,677,629  
Capital Markets — 0.8%        
E*Trade Financial Corp., 3.34%, 8/31/19 (a)(c)(d)   USD   439   717,765  
MU Finance Plc, 8.75%, 2/01/17 (a)   GBP   544   811,626  
Marsico Parent Co., LLC, 10.63%, 1/15/16 (a)   USD   1,346   890,042  
Marsico Parent Holdco, LLC, 3.13%, 7/15/16 (a)(e)     588   159,617  
Marsico Parent Superholdco, LLC,        
3.63%, 1/15/18 (a)(e)     388   83,826  
      2,662,876  
Chemicals — 0.7%        
Ames True Temper, Inc., 4.30%, 1/15/12 (f)     1,100   1,050,500  
LBI Escrow Corp., 8.00%, 11/01/17 (a)     1,300   1,347,125  
      2,397,625  
Commercial Banks — 1.2%        
VTB Capital SA, 6.88%, 5/29/18     3,940   4,151,775  
Containers & Packaging — 0.6%        
Impress Holdings BV, 3.43%, 9/15/13 (a)(f)     150   144,000  
Smurfit Kappa Acquisitions (a):        
      7.25%, 11/15/17   EUR   655   902,624  
      7.75%, 11/15/19     620   858,520  
      1,905,144  
Diversified Financial Services — 0.7%        
FCE Bank Plc, 7.13%, 1/16/12     1,300   1,756,850  
GMAC, Inc., 2.45%, 12/01/14 (f)   USD   550   487,600  
      2,244,450  
Diversified Telecommunication Services — 2.0%        
ITC Deltacom, Inc., 10.50%, 4/01/16 (a)     1,000   995,000  
New Communications Holdings, Inc.,        
7.88%, 4/15/15 (a)     650   671,125  

    Par    
Corporate Bonds     (000)   Value  
Diversified Telecommunication Services (concluded)        
Qwest Corp., 8.38%, 5/01/16   USD   1,840   $ 2,097,600  
Telefonica Emisiones SAU, 5.43%, 2/03/14   EUR   2,000   2,892,525  
      6,656,250  
Energy Equipment & Services — 0.6%        
Compagnie Generale de Geophysique-Veritas:        
      7.50%, 5/15/15   USD   70   70,875  
      7.75%, 5/15/17     50   50,500  
Expro Finance Luxembourg SCA, 8.50%, 12/15/16 (a)     1,750   1,793,750  
      1,915,125  
Food Products — 0.8%        
B&G Foods, Inc., 7.63%, 1/15/18     700   719,250  
Bumble Bee Foods LLC, 7.75%, 12/15/15 (a)     560   572,600  
Smithfield Foods, Inc., 10.00%, 7/15/14 (a)     1,300   1,459,250  
      2,751,100  
Health Care Equipment & Supplies — 0.2%        
DJO Finance LLC, 10.88%, 11/15/14     635   695,325  
Health Care Providers & Services — 0.6%        
American Renal Holdings, 8.38%, 5/15/18 (a)(g)     360   362,700  
HCA, Inc., 7.25%, 9/15/20 (a)     1,550   1,621,688  
Tenet Healthcare Corp. (a):        
      9.00%, 5/01/15     95   103,431  
      10.00%, 5/01/18     35   39,856  
      2,127,675  
Hotels, Restaurants & Leisure — 0.0%        
Greektown Holdings, LLC, 10.75%, 12/01/13 (a)(b)(h)     97   6,426  
Household Durables — 0.5%        
Beazer Homes USA, Inc., 12.00%, 10/15/17     1,500   1,715,625  
Berkline/BenchCraft, LLC, 4.50%, 11/03/12 (b)(h)     400    
      1,715,625  
IT Services — 0.2%        
SunGard Data Systems, Inc., 4.88%, 1/15/14     763   725,804  
Independent Power Producers & Energy Traders — 1.1%      
AES Ironwood LLC, 8.86%, 11/30/25     81   79,377  
Calpine Construction Finance Co. LP,        
8.00%, 6/01/16 (a)     1,000   1,035,000  
Energy Future Holdings Corp., 10.00%, 1/15/20 (a)     1,000   1,050,000  
NRG Energy, Inc., 7.25%, 2/01/14     1,450   1,469,937  
      3,634,314  
Machinery — 0.0%        
Synventive Molding Solutions, Sub-Series A,        
14.00%, 1/14/11 (e)     1,041   52,050  
Media — 2.2%        
Affinion Group, Inc., 10.13%, 10/15/13     50   51,875  
CCH II LLC, 13.50%, 11/30/16     223   270,506  
Charter Communications Operating, LLC,        
10.00%, 4/30/12 (a)     210   222,600  
Clear Channel Worldwide Holdings, Inc. (a):        
      Series A, 9.25%, 12/15/17     501   534,818  
      Series B, 9.25%, 12/15/17     1,704   1,825,410  
DISH DBS Corp., 7.00%, 10/01/13     58   60,030  
Nielsen Finance LLC, 10.00%, 8/01/14     400   420,000  
Seat Pagine Gialle SpA, 10.50%, 1/31/17 (a)   EUR   1,118   1,458,792  
UPC Germany GmbH, 8.13%, 12/01/17 (a)   USD   2,500   2,550,000  
      7,394,031  
Metals & Mining — 0.2%        
Foundation PA Coal Co., 7.25%, 8/01/14     505   516,362  
New World Resources NV, 7.38%, 5/15/15   EUR   285   368,080  
      884,442  

See Notes to Financial Statements.

30 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock Floating Rate Income Trust (BGT)
(Percentages shown are based on Net Assets)

    Par    
Corporate Bonds     (000)   Value  
Oil, Gas & Consumable Fuels — 3.5%        
Coffeyville Resources LLC, 9.00%, 4/01/15 (a)   USD   380   $ 387,600  
Morgan Stanley Bank AG for OAO Gazprom,        
  9.63%, 3/01/13     5,730   6,503,550  
Petroleos de Venezuela SA, 5.25%, 4/12/17     4,000   2,595,000  
Repsol International Finance B.V., 6.50%, 3/27/14   EUR   1,500   2,230,947  
      11,717,097  
Paper & Forest Products — 1.8%        
Ainsworth Lumber Co. Ltd., 11.00%, 7/29/15 (a)(e)   USD   494   474,195  
NewPage Corp., 11.38%, 12/31/14     4,970   5,106,675  
Verso Paper Holdings LLC, Series B, 4.09%, 8/01/14 (f)     520   473,200  
      6,054,070  
Pharmaceuticals — 0.3%        
Angiotech Pharmaceuticals, Inc., 4.00%, 12/01/13 (f)     900   734,625  
Novasep Holding SAS, 9.63%, 12/15/16 (a)   EUR   159   216,993  
      951,618  
Tobacco — 0.6%        
Imperial Tobacco Finance Plc, 4.38%, 11/22/13     1,500   2,096,155  
Wireless Telecommunication Services — 1.3%        
Cricket Communications, Inc., 7.75%, 5/15/16   USD   1,950   2,023,125  
iPCS, Inc., 2.47%, 5/01/13 (f)     1,155   1,091,475  
Nextel Communications, Inc., Series E,        
  6.88%, 10/31/13     975   957,938  
Sprint Capital Corp., 8.38%, 3/15/12     475   501,125  
      4,573,663  
Total Corporate Bonds — 21.4%       72,311,224  
Floating Rate Loan Interests (f)        
Aerospace & Defense — 1.1%        
Hawker Beechcraft Acquisition Co., LLC:        
      Letter of Credit Facility Deposit, 2.29%, 3/26/14     79   67,284  
      Term Loan, 2.27% – 2.29%, 3/26/14     1,323   1,131,260  
TASC, Inc.:        
      Tranche A Term Loan, 5.50%, 12/18/14     829   828,750  
      Tranche B Term Loan, 5.75%, 12/18/15     1,646   1,650,676  
      3,677,970  
Airlines — 0.8%        
Delta Air Lines, Inc., Revolving Credit, 2.27%, 4/30/12     2,700   2,551,500  
Auto Components — 2.9%        
Affinion Group Holdings, Inc.:        
      Loan, 7.89%, 3/01/12     1,063   1,004,986  
      Term Loan B, 5.00%, 4/08/16     2,000   1,985,000  
Allison Transmission, Inc., Term Loan,        
  3.00% – 3.05%, 8/07/14     4,297   4,102,263  
Cooper-Standard Automotive, Inc.:        
      Revolving Credit, 5.03%, 12/23/10     45   44,812  
      Revolving Credit, 5.03%, 12/23/10     41   41,289  
      Revolving Credit, 5.03%, 12/23/10     83   82,745  
      Term Loan A, 3.03%, 12/23/11     35   35,288  
      Term Loan B, 5.03%, 12/03/11     107   107,599  
      Term Loan C, 5.03%, 12/23/11     268   268,778  
      Term Loan D, 3.03%, 12/23/11     298   298,775  
      Term Loan E, 4.03%, 12/23/11     148   148,277  
Dana Holding Corp., Term Advance,        
  4.50% – 4.58%, 1/30/15     854   845,215  
Dayco Products:        
      Term Loan B, 10.50%, 5/13/14     205   203,569  
      Term Loan C, 12.50%, 11/13/14     30   27,550  
Exide Technologies, Term Loan, 3.69%, 5/15/12   EUR   399   500,006  

    Par    
Floating Rate Loan Interests (f)     (000)   Value  
Auto Components (concluded)        
GPX International Tire Corp., Tranche B        
  Term Loan (b)(h):        
      12.25%, 3/30/12   USD   286   $ —  
      14.00%, 4/11/12     5    
      9,696,152  
Automobiles — 0.6%        
Ford Motor Co., Tranche B-1 Term Loan,        
  3.26% – 3.31%, 12/15/13     2,217   2,137,597  
Beverages — 1.2%        
Culligan International Co., Loan (Second Lien),        
  5.15%, 4/24/13   EUR   1,000   661,288  
Le-Nature’s, Inc., Tranche B Term Loan,        
  9.50%, 3/01/11 (b)(h)   USD   1,000   393,333  
SW Acquisitions Co., Inc., Term Loan, 5.75%, 6/01/16     2,993   3,007,463  
      4,062,084  
Building Products — 1.2%        
Building Materials Corp. of America, Term Loan        
  Advance, 3.06%, 2/22/14     517   508,220  
Goodman Global, Inc., Term Loan, 6.25%, 2/13/14     2,840   2,845,851  
Momentive Performance Materials (Blitz 06-103        
  GmbH), Tranche B-1 Term Loan, 2.56%, 12/04/13     590   557,815  
United Subcontractors, First Lien Term Loan,        
  1.79%, 6/30/15     179   152,293  
      4,064,179  
Capital Markets — 0.4%        
Marsico Parent Co., LLC, Term Loan, 5.31%, 12/15/14     380   274,586  
Nuveen Investments, Inc., Term Loan,        
  3.32% – 3.33%, 11/13/14     999   910,951  
      1,185,537  
Chemicals — 8.5%        
Brenntag Holding Gmbh & Co. KG:        
      Acquisition Facility 1, 4.07% – 4.14%, 1/20/14     232   231,120  
      Facility 3B (Second Lien), 6.47%, 7/17/15     1,000   995,500  
      Facility B2, 4.01% – 4.07%, 1/20/14     1,332   1,328,223  
      Facility B6A and B6B, 4.70%, 11/24/37   EUR   414   547,763  
      Second Lien Term Loan, 4.73%, 1/20/14     267   348,707  
CF Industries Holdings, Inc., Bridge Loan,        
  5.25%, 3/17/15   USD   5,120   5,146,675  
Chemtura Corp., Debtor in Possession Return of        
  Capital Term Loan, 6.00%, 1/26/11     2,000   2,010,000  
Cognis GmbH, Facility B (French):        
      2.65%, 11/16/13   EUR   197   255,777  
      2.65%, 11/17/13     803   1,043,383  
ElectricInvest Holding Co. Ltd. (Viridian Group PLC),        
  Junior Term Facility, 5.05%, 12/21/12   GBP   1,800   2,285,907  
Huish Detergents, Inc., Loan (Second Lien),        
  4.51%, 10/26/14   USD   750   728,437  
Ineos US Finance LLC, Term A4 Facility,        
  7.00%, 12/14/12     1,087   1,090,300  
Lyondell Chemical Co.:        
      Debtor in Possession Term Loan,        
      13.00%, 6/03/10     1,165   1,199,950  
      Exit Term Loan, 5.50%, 3/24/16     1,200   1,203,205  
Matrix Acquisition Corp. (MacDermid, Inc.),        
  Tranche C Term Loan, 2.62%, 12/15/13   EUR   1,547   1,874,136  
Nalco Co., Term Loan, 6.50%, 5/13/16   USD   1,886   1,899,501  
PQ Corp., Term Loan (First Lien),        
  3.53% – 3.59%, 7/30/14     2,702   2,487,654  
Rockwood Specialties Group, Inc., Term Loan H,        
  6.00%, 5/15/14     1,223   1,229,697  
Solutia, Inc., Term Loan, 4.75%, 3/01/17     2,775   2,791,187  
      28,697,122  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

31


Schedule of Investments (continued)

BlackRock Floating Rate Income Trust (BGT)
(Percentages shown are based on Net Assets)

    Par    
Floating Rate Loan Interests (f)     (000)   Value  
Commercial Services & Supplies — 3.6%        
ARAMARK Corp.:        
      Facility Letter of Credit, 2.16%, 1/26/14   USD   38   $ 36,932  
      Line of Credit, 3.53%, 7/26/16     68   67,299  
      Term Loan B, 3.54%, 7/26/16     1,031   1,023,318  
      US Term Loan, 2.17%, 1/26/14     572   561,574  
Advanced Disposal Services, Inc., Term B Loan,        
  6.00%, 1/14/15     1,247   1,254,668  
Casella Waste Systems, Inc., Term B Loan,        
  7.00%, 4/09/14     1,092   1,098,573  
International Lease Finance Corp.:        
      Term Loan 1, 6.75%, 2/23/15     1,625   1,653,437  
      Term Loan 2, 7.00%, 3/05/16     1,200   1,212,900  
John Maneely Co., Term Loan, 3.55%, 12/09/13     1,125   1,079,439  
Johnson Diversey, Inc., Tranche B Dollar,        
  5.50%, 11/24/15     1,097   1,104,108  
Quad Graphics, Term Loan B, 4.00%, 4/20/16     725   721,828  
SIRVA Worldwide, Inc., Loan (Second Lien),        
  12.00%, 5/12/15     142   35,390  
Synagro Technologies, Inc., Term Loan (First Lien),        
  2.26%-2.28%, 4/02/14     1,961   1,772,195  
West Corp., Incremental Term B-3 Loan,        
  7.25%, 10/24/13     632   636,408  
      12,258,069  
Communications Equipment — 0.1%        
Safenet, Inc., Loan (Second Lien), 6.26%, 4/12/15     500   475,000  
Construction & Engineering — 1.2%        
Brand Energy & Infrastructure Services, Inc.        
  (FR Brand Acquisition Corp.), Synthetic Letter of        
  Credit, Term Loan (First Lien), 2.69%, 2/07/14     500   460,000  
Safway Services, LLC, First Out Term Loan,        
  9.00%, 12/14/17     2,100   2,100,000  
Welding Services, Term Loan B, 5.50%, 3/23/16     1,450   1,457,250  
      4,017,250  
Consumer Finance — 2.5%        
American General Finance Corp., Term Loan,        
  7.25%, 4/16/16     3,500   3,506,125  
Chrysler Financial Corp., Second Lien Term Loan,        
  6.76%, 8/02/13     2,450   2,429,584  
Chrysler Financial Services Americas LLC,        
  Term Loan (First Lien), 4.26%, 8/03/12     2,581   2,578,298  
      8,514,007  
Containers & Packaging — 1.8%        
Anchor Glass Container Corp., Term Loan B,        
  6.00%, 2/18/16     1,700   1,692,562  
Graham Packaging Co., LP, C Term Loan,        
  6.75%, 4/05/14     722   726,422  
OI European Group BV, Tranche D Term Loan,        
  1.90%, 6/14/13   EUR   1,895   2,434,792  
Smurfit Kappa Acquisitions (JSG):        
      C1 Term Loan Facility, 4.02% – 4.27%, 7/16/15     453   598,808  
      Term B1, 3.78% – 4.37%, 7/16/14     458   605,748  
Smurfit-Stone Container:        
      Revolving Credit, 0.02% – 5.00%, 11/12/09   USD   20   20,041  
      Revolving Credit US, 0.01% – 4.50%, 11/01/09     60   60,279  
Smurfit-Stone Container Canada, Inc.:        
      Tranche C, 2.50%, 11/01/11     26   25,836  
      Tranche C-1 Term Loan, 2.50%, 11/01/11     8   7,811  
Smurfit-Stone Container Enterprises, Inc.:        
      Deposit Funded Facility, 4.50%, 11/01/10     12   12,007  
      Tranche B, 2.50%, 11/01/11     14   13,664  
      6,197,970  

    Par    
Floating Rate Loan Interests (f)     (000)   Value  
Diversified Consumer Services — 2.1%        
Coinmach Laundry Corp., Delayed Draw Term Loan,        
  3.25% – 3.26%, 11/14/14   USD   495   $ 444,251  
Coinmach Service Corp., Term Loan, 3.26%, 11/14/14     2,526   2,265,274  
Laureate Education, Series A New Term Loan,        
  7.00%, 8/15/14     4,229   4,215,535  
      6,925,060  
Diversified Financial Services — 3.0%        
CIT Group, Inc., Tranche 2A Term Loan, 9.50%, 1/20/12     1,806   1,846,129  
MSCI, Inc., Term Loan B, 4.75%, 6/30/16     4,500   4,483,125  
Professional Service Industries, Inc., Term Loan        
  (First Lien), 3.02%, 10/31/12     526   421,151  
Reynolds Group Holdings, Inc., Return of        
  Capital Euro, 6.25%, 10/28/15   EUR   2,484   3,316,095  
      10,066,500  
Diversified Telecommunication Services — 3.4%        
Hawaiian Telcom Communications, Inc., Tranche C        
  Term Loan, 4.75%, 5/30/14   USD   1,235   926,102  
Integra Telecom Holdings, Inc., Term Loan,        
  9.25%, 4/12/15     2,025   2,033,100  
Level 3 Communications, Incremental Term Loan,        
  2.55%, 3/13/14     1,975   1,847,859  
Nordic Telephone Co. Holdings APS:        
      Facility B2 Swiss, 1.89%, 4/06/14   EUR   885   1,138,783  
      Facility C2 Swiss, 2.52%, 4/06/15     1,058   1,360,623  
US Telepacific Corp., Term Loan (Second Lien),        
  9.25%, 7/25/15   USD   625   630,469  
Wind Telecomunicazioni SpA:        
      A1 Term Loan Facility, 2.86% – 2.90%, 9/22/12   EUR   604   789,891  
      B1 Term Loan Facility, 3.65%, 9/22/13     1,000   1,313,912  
      C1 Term Loan Facility, 4.65%, 9/22/14     1,000   1,313,912  
      11,354,651  
Electric Utilities — 0.3%        
Astoria Generating Co. Acquisitions, LLC, Term B        
  Facility, 2.01% – 2.03%, 2/23/13   USD   351   344,631  
TPF Generation Holdings, LLC:        
      Synthetic Letter of Credit Deposit (First Lien),        
      2.29%, 12/15/13     151   145,623  
      Synthetic Revolving Deposit, 2.29%, 12/15/11     47   45,650  
      Term Loan (First Lien), 2.29%, 12/15/13     380   367,773  
      903,677  
Electrical Equipment — 0.0%        
Electrical Components International Holdings Co. (ECI),        
  Term Loan (Second Lien), 11.50%, 5/01/14 (b)(h)     500   60,000  
Electronic Equipment, Instruments & Components — 1.2%      
CDW Computer Centers, Inc., Term Loan B,        
  3.30%, 10/10/14     550   512,875  
Flextronics International Ltd.:        
      A Closing Date Loan, 2.54% – 2.55%, 10/01/14     1,156   1,113,435  
      Term Loan B, 2.54%, 10/01/12     2,244   2,194,686  
Matinvest 2 SAS/Butterfly Wendel US, Inc. (Deutsche        
  Connector), Second Lien, 5.09%, 12/22/15     500   330,000  
      4,150,996  
Energy Equipment & Services — 0.8%        
Dresser, Inc., Term Loan (Second Lien), 6.00%, 5/04/15   825   798,188  
MEG Energy Corp., Term Loan D, 6.00%, 4/03/16     1,973   1,949,780  
      2,747,968  
Food & Staples Retailing — 3.5%        
AB Acquisitions UK Topco 2 Ltd. (FKA Alliance Boots),        
    Facility B1, 3.55%, 7/09/15   GBP   3,000   4,286,897  
DSW Holdings, Inc., Term Loan, 4.26%, 3/02/12   USD   775   759,016  
Pierre Foods, Term Loan B, 7.00%, 2/17/16     1,350   1,359,000  
Pilot Travel Centers, Term Loan B, 5.25%, 11/18/15     3,500   3,521,248  

See Notes to Financial Statements.

32 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock Floating Rate Income Trust (BGT)
(Percentages shown are based on Net Assets)

    Par    
Floating Rate Loan Interests (f)     (000)   Value  
Food & Staples Retailing (concluded)        
Rite Aid Corp., Tranche 4 Term Loan, 9.50%, 6/10/15   USD   1,400   $ 1,456,291  
Roundy’s, Inc., Term Loan B, 3.75% – 3.78%, 11/03/13     499   501,487  
      11,883,939  
Food Products — 2.8%        
Birds Eye Iglo Group Ltd. (Liberator Midco Ltd.), Sterling        
  Tranche Loan (Mezzanine), 8.55%, 11/02/15   GBP   419   624,927  
CII Investment, LLC (FKA Cloverhill), Term Loan B:        
      8.50%, 10/14/14   USD   1,307   1,307,279  
      8.50%, 10/14/14     1,075   1,074,864  
Dole Food Co., Inc.:        
      Credit-Linked Deposit, 7.99%, 4/12/13     192   193,784  
      Term Loan B, 5.00% – 5.50%, 2/10/17     343   345,771  
      Term Loan C, 5.00%, 2/10/17     851   858,809  
FSB Holdings, Inc. (Fresh Start Bakeries), Term Loan        
  (Second Lien), 6.06%, 3/29/14     500   465,000  
Pilgrim’s Pride Corp., Term Loan A, 5.29%, 12/01/12     1,535   1,517,731  
Pinnacle Foods Finance LLC, Tranche C Term Loan,        
  7.50%, 4/02/14     3,100   3,116,470  
      9,504,635  
Health Care Equipment & Supplies — 1.9%        
Biomet, Inc., Euro Term Loan,        
  3.37% – 3.58%, 3/25/15   EUR   2,508   3,251,730  
DJO Finance LLC (ReAble Therapeutics Finance LLC),        
  Term Loan, 3.27%, 5/20/14   USD   1,331   1,292,012  
Fresenius AG:        
      Term Loan C1, 4.50%, 9/01/14     1,082   1,090,749  
      Term Loan C2, 4.50%, 9/01/14     618   623,064  
      6,257,555  
Health Care Providers & Services — 3.5%        
Ardent Health Services, Inc., Term Loan,        
  6.50%, 8/10/15     1,500   1,480,125  
CHS/Community Health Systems, Inc.:        
      Delayed Draw Term Loan, 2.50%, 7/25/14     170   165,131  
      Funded Term Loan, 2.50%, 7/25/14     3,319   3,224,677  
HCA, Inc., Tranche A-1 Term Loan, 1.79%, 11/16/12     2,615   2,535,268  
Harden Healthcare, Term Loan A, 8.50%, 2/22/15     1,000   980,000  
HealthSouth Corp., Term Loan,        
  2.51% – 2.55%, 3/10/13     794   778,778  
Vanguard Health Holding Co. II, LLC (Vanguard Health        
  Systems, Inc.), Initial Term Loan, 5.00%, 1/29/16     2,600   2,604,875  
      11,768,854  
Health Care Technology — 0.9%        
IMS Healthcare, Term Loan B, 5.25%, 2/16/16     3,070   3,085,860  
Hotels, Restaurants & Leisure — 3.4%        
BLB Worldwide Holdings, Inc. (Wembley, Inc.):        
      First Priority Term Loan, 4.75%, 7/18/11     2,418   1,704,838  
      Second Priority Term Loan, 7.06%, 7/18/12 (b)(h)     1,500   75,000  
Golden Nugget, Inc. (First Lien):        
      Additional Term Advance, 3.26% – 3.28%, 6/30/14     270   208,820  
      Term Advance, 3.28%, 6/30/14     474   366,751  
Green Valley Ranch Gaming, LLC, Loan (Second Lien),        
  8.00%, 8/16/14 (b)(h)     1,500   92,500  
Harrah’s Operating Co., Inc.:        
      Term B-3 Loan, 3.29% – 3.32%, 1/28/15     2,047   1,792,214  
      Term B-4 Loan, 9.50%, 10/31/16     1,496   1,551,527  
OSI Restaurant Partners, LLC, Pre-Funded RC Loan,        
  2.63%, – 4.58% 6/14/13     32   29,090  
Penn National Gaming, Inc., Term Loan B,        
  2.00% – 2.07%, 10/03/12     997   985,182  
Six Flags Theme Parks, Inc., Exit Term Loan,        
  6.00%, 4/19/16     2,750   2,749,142  

    Par    
Floating Rate Loan Interests (f)     (000)   Value  
Hotels, Restaurants & Leisure (concluded)        
VML US Finance LLC (aka Venetian Macau):        
      New Project Term Loan, 4.80%, 5/27/13   USD   158   $ 155,768  
      Term B Delayed Draw Project Loan, 4.80%, 5/25/12     721   710,169  
      Term B Funded Project Loan, 4.80%, 5/27/13     1,090   1,073,447  
      11,494,448  
Household Durables — 0.0%        
Berkline/Benchcraft, LLC, Term Loan,        
  14.00%, 11/03/11 (b)(h)     120   5,982  
Household Products — 0.2%        
VI-JON, Inc. (VJCS Acquisition, Inc.), Tranche B        
  Term Loan, 2.27%, 4/24/14     634   608,936  
IT Services — 4.3%        
Amadeus IT Group SA/Amadeus Verwaltungs GmbH:        
      Term B3 Facility, 2.40%, 6/30/13   EUR   615   801,345  
      Term B4 Facility, 2.40%, 6/30/13     489   637,920  
      Term C3 Facility, 2.90%, 6/30/14     615   801,607  
      Term C3 Facility, 2.90%, 6/30/14     489   638,129  
Audio Visual Services Group, Inc., Loan (Second Lien),        
  5.80%, 8/28/14   USD   1,077   344,653  
Ceridian Corp., US Term Loan, 3.26%, 11/09/14     1,737   1,635,640  
First Data Corp.:        
      Initial Tranche B-1 Term Loan,        
      3.01% – 3.04%, 9/24/14     2,441   2,195,014  
      Initial Tranche B-2 Term Loan,        
      3.03% – 3.04%, 9/24/14     1,582   1,419,796  
      Initial Tranche B-3 Term Loan,        
      3.03% – 3.04%, 9/24/14     2,355   2,115,425  
SunGard Data Systems, Inc. (Solar Capital Corp.),        
  Incremental Term Loan, 6.75%, 2/28/14     1,686   1,686,711  
Travelex Plc:        
      Term Loan B, 2.79%, 10/31/13     1,250   1,176,389  
      Term Loan C, 3.29%, 10/31/14     1,250   1,176,389  
      14,629,018  
Independent Power Producers & Energy Traders — 1.3%      
Dynegy Holdings, Inc.:        
      Term Letter of Credit Facility, 4.03%, 4/02/13     1,110   1,088,698  
      Tranche B Term Loan, 4.03%, 4/02/13     89   87,416  
Texas Competitive Electric Holdings Co., LLC (TXU):        
      Initial Tranche B-1 Term Loan,        
      3.75% – 3.79%, 10/10/14     2,465   2,019,151  
      Initial Tranche B-2 Term Loan,        
      3.75% – 3.79%, 10/10/14     1,080   884,694  
      Initial Tranche B-3 Term Loan,        
      3.75% – 3.79%, 10/10/14     379   308,491  
      4,388,450  
Industrial Conglomerates — 1.4%        
Sequa Corp., Term Loan, 3.48% – 3.55%, 12/03/14     5,124   4,755,931  
Insurance — 0.3%        
Alliant Holdings I, Inc., Term Loan, 3.29%, 8/21/14     975   927,469  
Internet & Catalog Retail — 0.2%        
FTD Group, Inc., Tranche B Term Loan, 6.75%, 8/26/14     573   573,173  
Machinery — 2.3%        
Accuride Corp., Term Loan, 9.75%, 1/31/12   GBP   1,150   1,148,850  
Blount International, Term Loan,        
  5.50% – 5.75%, 2/09/12   USD   532   530,547  
Bucyrus International, Term Loan C, 4.50%, 1/26/16     2,750   2,763,239  
Generac Acquisition Corp., Term Loan (First Lien),        
  2.79%, 11/10/13     1,176   1,103,738  
LN Acquisition Corp. (Lincoln Industrial)(First Lien):        
      Delayed Draw Term Loan, 3.51%, 7/11/14     245   230,021  
      Initial US Term Loan, 3.50% – 3.51%, 7/11/14     637   596,912  
Oshkosh Truck Corp., Term B Loan,        
  6.25% – 6.26%, 12/06/13     1,238   1,241,452  
      7,614,759  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

33


Schedule of Investments (continued)

BlackRock Floating Rate Income Trust (BGT)
(Percentages shown are based on Net Assets)

    Par    
Floating Rate Loan Interests (f)     (000)   Value  
Marine — 0.3%        
Horizon Lines, Inc.:        
      Return of Capital, 3.51% — 5.50%, 8/08/12   USD   845   $ 722,535  
      Term Loan A, 3.55%, 8/08/12     405   365,955  
      1,088,490  
Media — 19.1%        
Amsterdamse Beheer — En Consultingmaatschappij BV        
  (Casema):        
      B1 Term Loan Facility, 2.91%, 11/02/14   EUR   625   812,542  
      C Term Loan Facility, 3.41%, 11/02/15     625   812,542  
Atlantic Broadband Finance, LLC:        
      Term Loan B, 6.75%, 6/01/13   USD   1,854   1,850,916  
      Tranche B-2 Term Loan, 2.55%, 9/01/11     69   67,926  
Catalina Marketing Corp., Initial Term Loan,        
  3.01%, 10/01/14     389   380,687  
Cengage Learning Acquisitions, Inc. (Thomson Learning),        
  Tranche 1 Incremental Term Loan, 7.50%, 7/03/14     5,384   5,410,821  
Cequel Communications, LLC (Second Lien):        
      Tranche A Term Loan, 4.75% – 4.79%, 5/05/14     500   500,000  
      Tranche B Facility, 6.29%, 5/05/14(e)     2,975   2,997,313  
Charter Communications Operating, LLC:        
      New Term Loan, 2.30%, 3/06/14     548   519,212  
      Term Loan C, 3.55%, 9/06/16     4,440   4,243,261  
FoxCo Acquisition Sub, LLC, Term Loan, 7.50%, 7/14/15   1,019   1,009,415  
HIT Entertainment, Inc., Term Loan (Second Lien),        
  5.75%, 2/26/13     300   188,000  
HMH Publishing Co., Ltd., Tranche A Term Loan,        
  5.50%, 6/12/14     2,426   2,307,398  
Hanley-Wood, LLC (FSC Acquisition), Term Loan,        
  2.50% – 2.56%, 3/10/14     2,201   1,127,809  
Hargray Acquisition Co./DPC Acquisition LLC/        
  HCP Acquisition LLC, Loan (Second Lien),        
  5.75%, 1/29/15     500   457,500  
Harland Clarke Holdings Corp. (FKA Clarke American        
  Corp.), Tranche B Term Loan, 2.79%, 6/30/14     1,451   1,336,982  
Kabel Deutschland Holding GMBH, A Facility,        
  2.66%, 6/01/12   EUR   4,000   5,203,755  
Lamar Media Corp., Term Loan B, 4.25%, 12/30/16   USD   3,500   3,505,835  
Lavena Holding 3 GmbH (Prosiebensat.1 Media AG):        
      Facility B1, 3.34%, 6/28/15   EUR   337   357,142  
      Facility C1, 3.59%, 6/30/16     674   714,285  
Liberty Cablevision of Puerto Rico, Ltd., Initial Term        
  Facility, 2.26%, 6/17/14   USD   1,459   1,352,991  
Local TV Finance, LLC, Term Loan, 2.30%, 5/07/13     474   433,116  
MCNA Cable Holdings LLC (OneLink Communications),        
  Loan, 6.89%, 3/01/13(e)     1,004   828,039  
Mediacom Illinois, LLC (FKA Mediacom        
  Communications, LLC), Tranche D Term Loan,        
  5.50%, 3/31/17     1,244   1,247,170  
Mediannuaire Holding (Pages Jaunes), Term Loan D,        
  4.90%, 1/11/17   EUR   500   473,775  
Newsday, LLC:        
      Fixed Rate Term Loan, 10.50%, 8/01/13   USD   1,500   1,631,250  
      Floating Rate Term Loan, 6.55%, 8/01/13     1,250   1,270,834  
Nielsen Finance LLC, Class B, Dollar Term Loan,        
  4.00%, 5/01/16     2,281   2,252,046  
Nielsen Finance LLC, Dollar Term Loan, 2.25%, 8/09/13     1,145   1,114,559  
Penton Media, Inc., Term Loan (First Lien),        
  5.00%, 8/01/14     1,092   816,561  
Springer Science and Business Media SA, Facility A1,        
  6.75%, 7/01/16   EUR   3,200   4,246,444  
Sunshine Acquisition Ltd. (aka HIT Entertainment),        
  Term Facility, 5.50%, 3/20/12   USD   1,473   1,400,319  
UPC Financing Partnership, Facility U,        
  4.99%, 12/31/17   EUR   3,017   3,855,884  
Virgin NTL Cable Plc, Term Loan B, 4.40%, 12/31/15   GBP   2,000   3,022,415  

    Par    
Floating Rate Loan Interests (f)     (000)             Value  
Media (concluded)        
Weather Channel, Term Loan B, 5.00%, 9/14/15   USD   2,830   $ 2,852,492  
Worldcolor Press Inc. and Worldcolor (USA)        
  Corp. (FKA Quebecor World, Inc.), Advance,        
  9.00%, 7/23/12     2,015   2,032,268  
Yell Group Plc, Term Loan B, 4.02%, 7/31/14     2,113   1,721,987  
      64,355,491  
Metals & Mining — 0.2%        
Drummond Co., Inc., Term Advance, 1.51%, 2/14/11     700   679,000  
Multi-Utilities — 0.2%        
FirstLight Power Resources, Inc. (FKA NE Energy, Inc.):        
      Synthetic Letter of Credit, 2.81%, 11/01/13     65   62,288  
      Term B Advance (First Lien), 2.81%, 11/01/13     624   602,107  
Mach Gen, LLC, Synthetic Letter of Credit Loan        
  (First Lien), 2.29%, 2/22/13     69   63,811  
      728,206  
Multiline Retail — 1.9%        
Dollar General Corp.:        
      Tranche B-1 Term Loan, 3.01% – 3.09%, 7/07/14     377   370,991  
      Tranche B-2 Term Loan, 3.01% – 3.02%, 7/07/14     427   417,923  
Hema Holding BV:        
      Facility D, 5.40%, 1/01/17   EUR   3,800   4,477,672  
      (Term Loan B) Euro, 2.42%, 7/06/15     175   223,975  
      (Term Loan C) Euro, 3.17%, 7/05/16     175   223,975  
The Neiman Marcus Group, Inc., Term Loan,        
      2.25%, 4/06/13   USD   845   808,031  
      6,522,567  
Oil, Gas & Consumable Fuels — 1.3%        
Big West Oil, LLC:        
      Delayed Draw Loan, 4.50%, 5/15/14     920   909,406  
      Initial Advance Loan, 4.50%, 5/15/14     731   723,291  
      Initial Advance Loan, 12.00%, 1/26/15     775   781,458  
Tronox Worldwide LLC, Tranche B-1 Term Loan:        
      9.00%, 6/24/10     1,576   1,600,118  
      9.00%, 6/24/10     424   429,882  
      4,444,155  
Paper & Forest Products — 0.3%        
Georgia-Pacific LLC, Term Loan B,        
  2.25% – 2.34%, 12/23/12     853   846,789  
Verso Paper Finance Holdings LLC,        
  6.50% – 7.25%, 2/01/13(e)     372   204,802  
      1,051,591  
Personal Products — 0.3%        
American Safety Razor Co., LLC:        
      Loan (Second Lien), 10.50%, 1/30/14     1,150   667,000  
      Term Loan (First Lien), 6.75%, 7/31/13     530   488,458  
      1,155,458  
Pharmaceuticals — 1.1%        
Warner Chilcott Co., LLC, Term A Loan,        
  5.50%, 10/30/14     1,355   1,355,644  
Warner Chilcott Corp.:        
      Additional Term Loan, 5.75%, 4/30/15     624   624,203  
      Term B-1 Loan, 5.75%, 4/30/15     1,038   1,039,412  
      Term B-2 Loan, 5.75%, 4/30/15     723   723,637  
      3,742,896  
Professional Services — 0.7%        
Booz Allen Hamilton, Inc.:        
      Term Loan C, 6.00%, 7/31/15     1,247   1,247,810  
      Tranche B Term Loan, 7.50%, 7/31/15     987   991,172  
      2,238,982  

See Notes to Financial Statements.

34 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (continued)

BlackRock Floating Rate Income Trust (BGT)
(Percentages shown are based on Net Assets)

    Par    
Floating Rate Loan Interests (f)     (000)   Value  
Real Estate Management & Development — 1.5%        
Enclave, First Lien Term Loan, 6.14%, 3/01/12 (b)(h)   USD   2,000   $ 1  
Georgian Towers, Term Loan, 6.14%, 3/01/12     2,000    
Pivotal Promontory, LLC, Second Lien Term Loan,        
  12.00%, 8/31/11 (b)(h)     750   37,500  
Realogy Corp.:        
      Delayed Draw Term B Loan, 3.29%, 10/10/13     1,072   968,731  
      Initial Term B Loan, 3.29%, 10/10/13     2,261   2,043,400  
      Synthetic Letter of Credit, 3.28%, 10/10/13     609   550,146  
      Term Loan (Second Lien), 13.50%, 10/15/17     1,250   1,403,125  
      5,002,903  
Software — 0.9%        
Bankruptcy Management Solutions, Inc.:        
      Term Loan (First Lien), 4.28%, 7/31/12     935   635,969  
      Term Loan (Second Lien), 6.52%, 7/31/13     482   96,500  
Reynolds & Reynolds, Term Loan, 5.25%, 4/16/17     1,340   1,337,907  
Telecommunications Management, LLC:        
      Multi-Draw Term Loan, 3.52%, 6/30/13     231   195,979  
      Term Loan, 3.52%, 6/30/13     914   777,218  
      3,043,573  
Specialty Retail — 2.1%        
Bass Pro Group LLC Term Loan B, Term Loan B,        
  5.75%, 4/06/15     1,400   1,401,166  
Burlington Coat Factory Warehouse Corp.,        
  Term Loan, 2.51% – 4.50%, 5/28/13     740   706,873  
Matalan, Term Loan, 5.56%, 3/24/16   GBP   1,300   1,984,103  
Michaels Stores, Inc., B-1 Term Loan:        
      2.50% – 2.63%, 10/31/13   USD   1,585   1,518,317  
      4.75% – 4.88%, 7/31/16     65   64,098  
Orchard Supply Hardware, Term Loan B,        
  2.71%, 12/21/13     1,500   1,357,050  
      7,031,607  
Trading Companies & Distributors — 0.1%        
Beacon Sales Acquisition, Inc., Term B Loan,        
  2.25% – 2.29%, 9/30/13     469   459,942  
Transportation Infrastructure — 0.3%        
Airport Development and Investment Ltd. (BAA),        
  Facility (Second Lien), 4.85%, 4/07/11   GBP   566   836,219  
Wireless Telecommunication Services — 2.4%        
BCM Ireland Holdings Ltd. (Eircom):        
      Facility B, 2.28%, 8/14/14   EUR   499   588,547  
      Facility C, 2.53%, 8/14/13     499   588,565  
Cavtel Holdings, LLC, Term Loan,        
  10.50%, 12/31/12   USD   1,158   1,095,905  
Digicel International Finance Ltd., Tranche A,        
  2.81%, 3/30/12     4,070   3,983,662  
MetroPCS Wireless, Inc., Tranche B Term Loan,        
  2.50% – 2.56%, 11/03/13     1,846   1,801,517  
      8,058,196  
Total Floating Rate Loan Interests — 95.4%       321,681,574  
Foreign Government Obligations        
Argentina Bonos:        
  0.39%, 8/03/12 (f)     3,750   3,371,395  
  7.00%, 10/03/15     2,000   1,610,555  
Brazilian Government International Bond,        
  8.00%, 1/15/18     7,111   8,248,889  
Colombia Government International Bond,        
  3.81%, 3/17/13 (f)     1,200   1,203,000  
Republic of Venezuela, 1.31%, 4/20/11 (f)     4,000   3,660,000  

    Par    
Foreign Government Obligations     (000)   Value  
South Africa Government International Bond,        
  7.38%, 4/25/12   USD   2,400   $ 2,616,000  
Turkey Government International Bond,        
  7.00%, 9/26/16     2,735   3,039,269  
Uruguay Government International Bond,        
  6.88%, 1/19/16   EUR   950   1,343,934  
Total Foreign Government Obligations — 7.4%       25,093,042  
  Beneficial    
    Interest    
Other Interests (i)     (000)    
Auto Components — 1.2%        
Dayco Products LLC Mark IV Industrials, Inc.   USD   9   387,912  
Delphi Debtor-in-Possession Hold Co. LLP,        
  Class B Membership Interests     —(j)   3,672,230  
Lear Corp. Escrow     500   11,500  
      4,071,642  
Diversified Financial Services — 0.3%        
J.G. Wentworth LLC Preferred Equity Interests (k)     1   1,130,844  
Health Care Providers & Services — 0.0%        
Critical Care Systems International, Inc.     1   191  
Household Durables — 0.0%        
Berkline Benchcraft Equity LLC     6    
Total Other Interests — 1.5%       5,202,677  
Preferred Securities        
Preferred Stocks     Shares    
Specialty Retail — 0.0%        
Lazydays RV Center, Inc. (b)     58   57,680  
Total Preferred Securities — 0.0%       57,680  
Warrants (l)        
Chemicals — 0.0%        
British Vita Holding Co. (Non-Expiring) (a)     166    
Machinery — 0.0%        
Synventive Molding Solutions (Expires 1/15/13)     2    
Media — 0.0%        
Cumulus Media (Expires 12/31/19)     2,315   8,589  
New Vision Holdings LLC:        
(Expires 9/30/14)     3,424   34  
(Expires 9/30/14)     19,023   190  
      8,813  
Software — 0.0%        
HMH Holdings/EduMedia (Expires 3/09/17)     21,894    
Total Warrants — 0.0%       8,813  
Total Long-Term Investments        
(Cost — $442,415,652) — 126.3%       426,265,037  
Short-Term Securities        
BlackRock Liquidity Funds, TempFund,        
  Institutional Class, 0.13% (m)(n)   8,662,749   8,662,749  
Total Short-Term Securities        
(Cost — $8,662,749) — 2.6%       8,662,749  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

35


Schedule of Investments (continued)

BlackRock Floating Rate Income Trust (BGT)
(Percentages shown are based on Net Assets)

Options Purchased   Contracts   Value  
Over-the-Counter Call Options — 0.0%      
Marsico Parent Superholdco LLC, expires 12/21/19      
at USD 942.86, Broker Goldman Sachs Group, Inc.   26   $ 5,460  
Total Options Purchased (Cost — $25,422) — 0.0%     5,460  
Total Investments (Cost — $451,103,823*) — 128.9%     434,933,246  
Liabilities in Excess of Other Assets — (11.5)%     (38,783,153)  
Preferred Shares, at Redemption Value — (17.4)%     (58,812,346)  
Net Assets Applicable to Common Shares — 100.0%     $ 337,337,747  

* The cost and unrealized appreciation (depreciation) of investments as of April 30,
2010, as computed for federal income tax purposes, were as follows:

Aggregate cost   $ 451,145,378  
Gross unrealized appreciation   $ 14,229,926  
Gross unrealized depreciation   (30,442,058)  
Net unrealized depreciation   $ (16,212,132)  

(a) Security exempt from registration under Rule 144A of the Securities Act of 1933.
These securities may be resold in transactions exempt from registration to qualified
institutional investors.
(b) Non-income producing security.
(c) Convertible security.
(d) Represents a zero-coupon bond. Rate shown reflects the current yield as of
report date.
(e) Represents a payment-in-kind security which may pay interest/dividends in
additional face/shares.
(f) Variable rate security. Rate shown is as of report date.
(g) When-issued security. Unsettled when-issued transactions were as follows:

    Unrealized  
Counterparty   Value   Appreciation  
Bank of America, NA   $ 362,700   $ 5,292  

(h) Issuer filed for bankruptcy and/or is in default of interest payments.
(i) Other interests represent beneficial interest in liquidation trusts and other reorgani-
zation entities and are non-income producing.
(j) Amount is less than $1,000.
(k) The investment is held by a wholly owned taxable subsidiary of the Fund.
(l) Warrants entitle the Fund to purchase a predetermined number of shares of com-
mon stock and are non-income producing. The purchase price and number of
shares are subject to adjustment under certain conditions until the expiration date.
(m) Investments in companies considered to be an affiliate of the Fund, for purposes of
Section 2(a)(3) of the Investment Company Act of 1940, were as follows:

  Shares Held at     Shares Held at    
  October 31,   Net   April 30,    
Affiliate   2009   Activity   2010   Income  
BlackRock Liquidity          
    Funds, TempFund,          
    Institutional Class   9,320,934   (658,185)     8,662,749 $         2,288  

(n) Represents the current yield as of report date.
For Fund compliance purposes, the Fund’s industry classifications refer to any one
or more of the industry sub-classifications used by one or more widely recognized
market indexes or rating group indexes, and/or as defined by Fund management.
This definition may not apply for purposes of this report, which may combine such
industry sub-classifications for reporting ease.

Foreign currency exchange contracts as of April 30, 2010 were as follows:

  Currency     Currency       Settlement   Unrealized  
  Purchased          Sold   Counterparty   Date   Appreciation  
  USD66,548,101   EUR         49,177,000   Citibank NA   5/26/10   $ 1,065,395  
  USD 3,066,901   GBP     1,980,000   Citibank NA   7/28/10   38,532  
  USD18,787,022   GBP        12,142,500       RBS      
          Securities Inc.   7/28/10   215,321  
  Total               $ 1,319,248  
  Credit default swaps on single-name issues — sold protection outstanding as of  
  April 30, 2010 were as follows:          
    Receive         Notional    
    Fixed   Counter-     Credit        Amount   Unrealized  
  Issuer   Rate          party                  Expiration              Rating 1   (000) 2   Depreciation  
  BAA Ferrovial                
  Junior Term   2.00%   Deutsche   March        
  Loan       Bank AG   2012   NR          GBP 1,800                     $ (173,967)              

1 Using Standard & Poor’s rating of the issuer.
2 The maximum potential amount the Fund may pay should a negative credit
event take place as defined under the terms of the agreement.

Fair Value Measurements — Various inputs are used in determining the fair value of
investments, which are as follows:
Level 1 — price quotations in active markets/exchanges for identical assets
and liabilities
Level 2 — other observable inputs (including, but not limited to: quoted prices for
similar assets or liabilities in markets that are active, quoted prices for identical
or similar assets or liabilities in markets that are not active, inputs other than
quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and
default rates) or other market-corroborated inputs)
Level 3 — unobservable inputs based on the best information available in the
circumstances, to the extent observable inputs are not available (including the
Fund’s own assumptions used in determining the fair value of investments)
The inputs or methodologies used for valuing securities are not necessarily an
indication of the risk associated with investing in those securities. For information
about the Fund’s policy regarding valuation of investments and other significant
accounting policies, please refer to Note 1 of the Notes to Financial Statements.
The following table summarizes the inputs used as of April 30, 2010 in determining
the fair valuation of the Fund’s investments:

Investments in Securities

Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets:            
Long-Term            
Investments:            
    Common            
    Stocks   $ 247,438   $ 283,235   $ 1,379,354 $   1,910,027  
    Corporate            
    Bonds       72,220,406   90,818   72,311,224  
    Floating            
    Rate Loan            
    Interests       245,603,580   76,077,994   321,681,574  
    Foreign            
    Government            
    Obligations .       25,093,042     25,093,042  
    Other            
    Interests       11,500   5,191,177   5,202,677  
    Preferred            
    Stocks         57,680   57,680  
    Warrants       8,589   224   8,813  
Short-Term            
Securities     8,662,749       8,662,749  
Total   $ 8,910,187   $343,220,352   $82,797,247 $   434,927,786  

See Notes to Financial Statements.

36 SEMI-ANNUAL REPORT

APRIL 30, 2010


Schedule of Investments (concluded)

BlackRock Floating Rate Income Trust (BGT)

The following table summarizes the inputs used as of April 30, 2010 in determining
the fair valuation of the Fund’s other financial instruments:

Other Financial Instruments 1

Valuation Inputs   Level 1   Level 2   Level 3   Total  
Assets     $ 1,324,708   $ 9,486 $   1,334,194  
Liabilities       (196,065)   (196,065)  
Total     $ 1,324,708   $ (186,579) $   1,138,129  

1 Other financial instruments are swaps, foreign currency exchange contracts,
unfunded loan commitments and options. Swaps, foreign currency exchange
contracts and unfunded loan commitments are shown at the unrealized
appreciation/depreciation on the instrument and options are shown at
market value.

The following table is a reconciliation of Level 3 investments for which significant unobservable inputs were used to determine fair value:

        Investments in Securities      
  Common   Corporate   Floating Rate   Other   Preferred      
  Stocks   Bonds   Loan Interests       Interests   Stocks   Warrants   Total  
Balance, as of October 31, 2009   $ 112,485   $ 288,246   $84,427,073   $ 2,726,281     $ 224   $87,554,309  
Accrued discounts/premiums     113,227   690,268         803,495  
Realized gain (loss)       (6,804,623)   (2,000,875)       (8,805,498)  
Change in unrealized                
appreciation/                
depreciation 2   174,051   74,918   11,686,521   4,482,269       16,417,759  
Net purchases (sales)   10,611   (385,573)   (25,768,459)   (404,410)   $ 57,680     (26,490,151)  
Net transfers in/out   1,082,207     11,847,214   387,912       13,317,333  
Balance, as of April 30, 2010   $ 1,379,354   $ 90,818   $76,077,994   $ 5,191,177   $ 57,680   $ 224   $82,797,247  

2 Included in the related net change in unrealized appreciation/depreciation on the Statements of Operations. The change in unrealized appreciation/depreciation on securities
still held at April 30, 2010 was $5,661,500.

The following table is a reconciliation of Level 3 other financial instruments for which
significant unobservable inputs were used to determine fair value:

Investments in Other
Financial Instruments 3

  Assets   Liabilities  
Balance, as of October 31, 2009   $ 1,531   $ (461,174)  
Accrued discounts/premiums      
Realized gain (loss)      
Change in unrealized      
appreciation/depreciation 4   7,955   265,109  
Net purchases (sales)      
Net transfers in/out      
Balance, as of April 30, 2010   $ 9,486   $ (196,065)  

3 Other financial instruments are swaps and unfunded loan commitments.
4 Included in the related net change in unrealized appreciation/depreciation
on the Statements of Operations. The change in unrealized appreciation/
depreciation on securities still held at April 30, 2010 was $273,064.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

37


Statements of Assets and Liabilities            
  BlackRock   BlackRock   BlackRock   BlackRock   BlackRock  
  Credit   Credit   Credit   Credit   Floating  
  Allocation   Allocation   Allocation   Allocation   Rate  
  Income   Income   Income   Income   Income  
  Trust I, Inc.   Trust II, Inc.   Trust III   Trust IV   Trust  
April 30, 2010 (Unaudited)   (PSW)   (PSY)   (BPP)   (BTZ)   (BGT)  
      Assets            
Investments at value — unaffiliated 1   $ 149,785,695   $ 637,264,195   $ 283,783,732   $ 980,085,475   $ 426,270,497  
Investments at value — affiliated 2   124,379   1,817,048   6,947,057   41,474,360   8,662,749  
Unrealized appreciation on foreign currency exchange contracts           1,319,248  
Unrealized appreciation on unfunded loan commitments           9,486  
Cash         10,585    
Cash pledged as collateral for financial futures contracts   50,000     40,000   850,000    
Cash pledged as collateral for swaps         600,000   600,000  
Foreign currency at value 3   383     478   44   11,220,886  
Investments sold receivable       68,575     19,574,067  
Interest receivable   2,219,885   9,365,164   4,248,900   14,334,034   3,114,886  
Dividends receivable   20,344   80,916   33,707   95,076   355  
Margin variation receivable   12,375   18,563   10,969   205,125    
Income receivable — affiliated     204   208   520    
Swaps receivable           6,426  
Commitment fees receivable           539  
Principal paydown receivable           13,916  
Other assets     72,794   52,203   112,664   100,452  
Prepaid expenses   54,878   86,085   41,606   119,075   127,541  
Total assets   152,267,939   648,704,969   295,227,435   1,037,886,958   471,021,048  
      Liabilities            
Bank overdraft           11,921  
Loan payable           37,000,000  
Unrealized depreciation on swaps   175,918   351,837   175,919   703,674   173,967  
Unrealized depreciation on unfunded loan commitments           22,098  
Reverse repurchase agreements   2,662,946   7,707,202     68,653,890    
Investments purchased payable   1,749,493   7,509,850   3,631,029   12,229,581   37,202,721  
Investment advisory fees payable   76,917   329,225   162,849   563,764   218,360  
Income dividends payable — Common Shares   34,119   189,927   62,316   520,120    
Swaps payable   6,067   12,133   6,067   24,267    
Officer's and Directors' fees payable   978   76,661   53,469   113,451   93,179  
Deferred income           9,486  
Other affiliates payable   888   3,728   1,764   5,932   2,513  
Interest payable   305   883     7,867   25,452  
Other accrued expenses payable   48,486   104,451   103,220   152,617   111,258  
Total liabilities   4,756,117   16,285,897   4,196,633   82,975,163   74,870,955  
      Preferred Shares at Redemption Value            
$25,000 per share liquidation preferrence, plus unpaid dividends 4,5,6   40,259,152   169,091,457   70,427,782   231,045,162   58,812,346  
Net Assets Applicable to Common Shareholders   $ 107,252,670   $ 463,327,615   $ 220,603,020   $ 723,866,633   $ 337,337,747  
      Net Assets Applicable to Common Shareholders Consist of            
Paid-in capital 4,7,8   $ 237,664,112   $ 942,700,922   $ 423,649,824   $1,138,011,175   $ 427,834,152  
Undistributed (distributions in excess of) net investment income   (540,094)   (3,493,073)   (804,992)   (12,201,408)   794,510  
Accumulated net realized loss   (129,558,170)   (462,183,032)   (190,069,747)   (378,722,908)   (76,159,238)  
Net unrealized appreciation/depreciation   (313,178)   (13,697,202)   (12,172,065)   (23,220,226)   (15,131,677)  
Net Assets Applicable to Common Shareholders   $ 107,252,670   $ 463,327,615   $ 220,603,020   $ 723,866,633   $ 337,337,747  
Net asset value per Common Share   $ 10.40   $ 11.35   $ 11.95   $ 13.97   $ 14.32  
      1 Investments at cost — unaffiliated   $ 149,969,746   $ 650,680,840   $ 295,822,018   $1,003,236,130   $ 442,441,074  
      2 Investments at cost — affiliated   $ 124,379   $ 1,817,048   $ 6,947,057   $ 41,474,360   $ 8,662,749  
      3 Foreign currency at cost   $ 368     $ 459   $ 43   $ 11,312,614  
      4 Preferred and Common Shares par value per share   $ 0.10   $ 0.10   $ 0.001   $ 0.001   $ 0.001  
      5 Preferred Shares outstanding   1,610   6,761   2,817   9,240   2,352  
      6 Preferred Shares authorized   5,460   22,000   unlimited   unlimited   unlimited  
      7 Common Shares outstanding   10,311,941   40,807,418   18,467,785   51,828,157   23,564,801  
      8 Common Shares authorized   199,994,540   199,978,000   unlimited   unlimited   unlimited  

See Notes to Financial Statements.

38 SEMI-ANNUAL REPORT

APRIL 30, 2010


Statements of Operations            
  BlackRock   BlackRock   BlackRock   BlackRock   BlackRock  
          Credit            Credit         Credit         Credit         Floating  
  Allocation   Allocation   Allocation       Allocation           Rate  
  Income         Income         Income         Income         Income  
  Trust I, Inc.   Trust II, Inc.         Trust III         Trust IV           Trust  
Six Months Ended April 30, 2010 (Unaudited)           (PSW)            (PSY)         (BPP)           (BTZ)           (BGT)  
      Investment Income            
Interest   $ 2,457,577   $ 11,090,605   $ 5,397,384   $ 16,318,520   $ 12,769,115  
Dividends   910,188   5,066,074   2,052,105   6,497,752   4,162  
Income — affiliated   25,184   90,414   43,062   164,333   2,288  
Facility and other fees           364,415  
Total income   3,392,949   16,247,093   7,492,551   22,980,605   13,139,980  
      Expenses            
Investment advisory   427,527   1,813,388   907,950   3,104,956   1,515,471  
Commissions for Preferred Shares   30,648   131,079   53,486   172,274   42,764  
Professional   26,915   32,741   29,759   51,418   103,581  
Transfer agent   24,517   65,299   18,638   19,627   15,137  
Accounting services   14,412   74,921   43,378   81,982   31,068  
Printing   6,999   28,589   40,823   129,371   35,363  
Officers and Directors   5,512   27,930   15,304   40,987   21,979  
Registration   5,020   7,913   5,143   9,065   4,569  
Custodian   4,166   12,754   9,406   18,315   74,280  
Borrowing cost 1           208,351  
Miscellaneous   21,338   45,290   33,502   67,428   58,436  
Total expenses excluding interest expense   567,054   2,239,904   1,157,389   3,695,423   2,110,999  
Interest expense   5,683   13,855     113,838   165,117  
Total expenses   572,737   2,253,759   1,157,389   3,809,261   2,276,116  
Less fees waived by advisor   (14,257)   (48,676)   (22,496)   (91,034)   (304,457)  
Less fees paid indirectly       (3,804)   (70)    
Total expenses after fees waived and paid indirectly   558,480   2,205,083   1,131,089   3,718,157   1,971,659  
Net investment income   2,834,469   14,042,010   6,361,462   19,262,448   11,168,321  
      Realized and Unrealized Gain (Loss)            
Net realized gain (loss) from:            
    Investments   (1,280,649)   (10,839,240)   (2,368,330)   20,300,392   (9,531,475)  
    Financial futures contracts   151,309   (14,840)   (8,662)   6,287,543    
    Swaps   (26,289)   (52,578)   (26,289)   (105,156)   (40,786)  
    Foreign currency transactions           6,510,307  
    Options written         (2,202,351)    
  (1,155,629)   (10,906,658)   (2,403,281)   24,280,428   (3,061,954)  
Net change in unrealized appreciation/depreciation on:            
    Investments   13,591,954   70,500,903   20,614,474   59,030,355   23,567,083  
    Financial futures contracts   (48,196)   36,435   22,607   (203,337)    
    Swaps   (6,966)   (13,933)   (6,967)   (27,865)   275,079  
    Foreign currency transactions   (41)     (49)   (6)   2,161,128  
    Options written         (661,829)    
    Unfunded loan commitments           58,337  
  13,536,751   70,523,405   20,630,065   58,137,318   26,061,627  
Total realized and unrealized gain   12,381,122   59,616,747   18,226,784   82,417,746   22,999,673  
      Dividends to Preferred Shareholders From            
Net investment income   (298,930)   (1,260,733)   (84,996)   (1,715,794)   (436,859)  
Net Increase in Net Assets Applicable to Common            
    Shareholders Resulting from Operations   $ 14,916,661   $ 72,398,024   $ 24,503,250   $ 99,964,400   $ 33,731,135  
    1 See Note 8 of the Notes to the Financial Statements for details of short-term borrowings.          

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

39


Statements of Changes in Net Assets          
  BlackRock Credit Allocation   BlackRock Credit Allocation  
  Income Trust I, Inc. (PSW)   Income Trust II, Inc. (PSY)  
  Six Months   Year         Six Months   Year  
  Ended   Ended   Ended   Ended  
  April 30, 2010   October 31,   April 30, 2010       October 31,  
Increase (Decrease) in Net Assets Applicable to Common Shareholders:   (Unaudited)   2009   (Unaudited)   2009  
      Operations          
Net investment income   $ 2,834,469   $ 8,880,738   $ 14,042,010   $ 45,246,551  
Net realized loss   (1,155,629)   (56,926,270)   (10,906,658)   (196,959,541)  
Net change in unrealized appreciation/depreciation   13,536,751   78,150,799   70,523,405   285,726,033  
Dividends to Preferred Shareholders from net investment income   (298,930)   (774,824)   (1,260,733)   (3,570,342)  
Net increase in net assets applicable to Common Shareholders resulting from operations   14,916,661   29,330,443   72,398,024   130,442,701  
      Dividends and Distributions to Common Shareholders From          
Net investment income   (3,712,299)   (8,498,069)   (18,363,338)   (45,358,157)  
Tax return of capital     (1,345,345)     (116,310)  
Decrease in net assets resulting from dividends and distributions          
    to Common Shareholders   (3,712,299)   (9,843,414)   (18,363,338)   (45,474,467)  
      Capital Share Transactions          
Reinvestment of common dividends     131,419     1,192,453  
      Net Assets Applicable to Common Shareholders          
Total increase in net assets applicable to Common Shareholders   11,204,362   19,618,448   54,034,686   86,160,687  
Beginning of period   96,048,308   76,429,860   409,292,929   323,132,242  
End of period   $ 107,252,670   $ 96,048,308   $ 463,327,615   $ 409,292,929  
Undistributed (distributions in excess of) net investment income   $ (540,094)   $ 636,666   $ (3,493,073)   $ 2,088,988  
  BlackRock Credit Allocation   BlackRock Credit Allocation  
  Income Trust III (BPP)   Income Trust IV (BTZ)  
  Six Months   Year         Six Months   Year  
  Ended   Ended   Ended   Ended  
  April 30, 2010   October 31,   April 30, 2010       October 31,  
Increase (Decrease) in Net Assets Applicable to Common Shareholders:   (Unaudited)   2009   (Unaudited)   2009  
      Operations          
Net investment income   $ 6,361,462   $ 20,010,967   $ 19,262,448   $ 51,505,911  
Net realized gain (loss)   (2,403,281)   (116,393,404)   24,280,428   (247,029,147)  
Net change in unrealized appreciation/depreciation   20,630,065   160,906,851   58,137,318   378,816,964  
Dividends and distributions to Preferred Shareholders from net investment income   (84,996)   (577,861)   (1,715,794)   (3,828,948)  
Net increase in net assets applicable to Common Shareholders          
    resulting from operations   24,503,250   63,946,553   99,964,400   179,464,780  
      Dividends and Distributions to Common Shareholders From          
Net investment income   (8,033,486)   (17,461,459)   (31,096,894)   (48,398,817)  
Tax return of capital     (4,250,036)     (24,678,883)  
Decrease in net assets resulting from dividends and distributions          
    to Common Shareholders   (8,033,486)   (21,711,495)   (31,096,894)   (73,077,700)  
      Capital Share Transactions          
Reinvestment of common dividends     587,363      
      Net Assets Applicable to Common Shareholders          
Total increase in net assets applicable to Common Shareholders   16,469,764   42,822,421   68,867,506   106,387,080  
Beginning of period   204,133,256   161,310,835   654,999,127   548,612,047  
End of period   $ 220,603,020   $ 204,133,256   $ 723,866,633   $ 654,999,127  
Undistributed (distributions in excess of) net investment income   $ (804,992)   $ 952,028   $ (12,201,408)   $ 1,348,832  
See Notes to Financial Statements.          

40 SEMI-ANNUAL REPORT

APRIL 30, 2010


Statements of Changes in Net Assets (concluded)      
  BlackRock               
  Floating Rate Income Trust (BGT)  
  Six Months   Year  
  Ended      Ended  
  April 30, 2010   October 31,  
Increase (Decrease) in Net Assets Applicable to Common Shareholders:   (Unaudited)   2009  
      Operations      
Net investment income   $ 11,168,321   $ 23,060,864  
Net realized loss   (3,061,954)   (48,386,859)  
Net change in unrealized appreciation/depreciation   26,061,627   112,537,512  
Dividends to Preferred Shareholders from net investment income   (436,859)   (971,243)  
Net increase in net assets applicable to Common Shareholders resulting from operations   33,731,135   86,240,274  
      Dividends and Distributions to Common Shareholders From      
Net investment income   (9,539,342)   (27,963,106)  
Tax return of capital     (9,994,857)  
Decrease in net assets resulting from dividends and distributions to Common Shareholders   (9,539,342)   (37,957,963)  
      Capital Share Transactions      
Reinvestment of common dividends   273,755    
      Net Assets Applicable to Common Shareholders      
Total increase in net assets applicable to Common Shareholders   24,465,548   48,282,311  
Beginning of period   312,872,199   264,589,888  
End of period   $ 337,337,747   $ 312,872,199  
Undistributed (distributions in excess of) net investment income   $ 794,510   $ (397,610)  

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

41


Statement of Cash Flows    
  Six Months  
  Ended  
  April 30, 2010  
BlackRock Floating Rate Income Trust (BGT)   (Unaudited)  
      Cash Used for Operating Activities    
Net increase in net assets resulting from operations, excluding dividends to Preferred Shareholders   $ 34,167,994  
Adjustments to reconcile net increase in net assets resulting from operations to net cash used for operating activities:    
    Decrease in interest receivable   16,946  
    Decrease in swap receivable   467  
    Increase in commitment fees receivable   (539)  
    Decrease in other assets   24,202  
    Increase in dividends receivable   (355)  
    Decrease in income receivable — affiliated   341  
    Increase in investment advisory fees payable   12,141  
    Decrease in interest expense payable   (15,374)  
    Increase in other affiliates payable   289  
    Decrease in accrued expenses payable   (73,794)  
    Decrease in swaps payable   (4,317)  
    Decrease in other liabilities   (845,950)  
    Increase in Officer and Directors payable   14,303  
    Net periodic and termination payments of swaps   35,386  
    Realized and unrealized gain — net   (16,317,203)  
    Amortization of premium and discount on investments   (1,948,886)  
    Paid-in-kind income   (256,753)  
    Proceeds from sales and paydowns of long-term investments   205,141,042  
    Purchases and payups of long-term investments   (232,120,335)  
    Net proceeds from sales of short-term securities   658,185  
Cash used for operating activities   (11,512,210)  
      Cash Provided by Financing Activities    
Cash receipts from borrowings   166,000,000  
Cash payments from borrowings   (143,000,000)  
Cash dividends paid to Common Shareholders   (9,316,700)  
Cash dividends paid to Preferred Shareholders   (436,548)  
Increase in bank overdraft   11,921  
Cash provided by financing activities   13,258,673  
      Cash Impact from Foreign Exchange Fluctuations    
Cash impact from foreign exchange fluctuations   (42,879)  
      Cash    
Net increase in cash   1,703,584  
Cash at beginning of period   9,517,302  
Cash at end of period   $ 11,220,886  
      Cash Flow Information    
Cash paid for interest   $ 180,491  
      Noncash Financing Activities    
Capital shares issued in reinvestment of dividends paid to shareholders   $ 273,755  

A Statement of Cash Flows is presented when a Fund had a significant amount of borrowing during the period, based on the average borrowing outstanding in relation to
total assets.

See Notes to Financial Statements.

42 SEMI-ANNUAL REPORT

APRIL 30, 2010


Financial Highlights       BlackRock Credit Allocation Income Trust I, Inc. (PSW)  
  Six Months              
  Ended                  
  April 30, 2010     Year Ended October 31,      
  (Unaudited)   2009   2008   2007     2006   2005  
      Per Share Operating Performance                
Net asset value, beginning of period   $ 9.31   $ 7.43   $ 19.54   $ 22.25   $ 22.36   $ 23.69  
Net investment income   0.27 1   0.86 1   1.70 1   2.01 1     2.14 1   2.16  
Net realized and unrealized gain (loss)   1.21   2.06   (12.06)   (2.41)     0.07   (1.09)  
Dividends to Preferred Shareholders from net investment income   (0.03)   (0.08)   (0.48)   (0.71)     (0.63)   (0.40)  
Net increase (decrease) from investment operations   1.45   2.84   (10.84)   (1.11)     1.58   0.67  
Dividends and distributions to Common Shareholders from:                
    Net investment income   (0.36) 2   (0.83)   (1.22)   (1.18)     (1.69)   (2.00)  
    Tax return of capital     (0.13)   (0.05)   (0.42)        
Total dividends and distributions   (0.36)   (0.96)   (1.27)   (1.60)     (1.69)   (2.00)  
Net asset value, end of period   $ 10.40   $ 9.31   $ 7.43   $ 19.54   $ 22.25   $ 22.36  
Market price, end of period   $ 9.32   $ 8.24   $ 7.00   $ 17.29   $ 21.26   $ 21.03  
      Total Investment Return 3                
Based on net asset value   16.40% 4   46.46%   (58.09)%   (5.03)%     7.97%   3.25%  
Based on market price   17.86% 4   37.59%   (55.38)%   (12.05)%     9.69%   0.73%  
      Ratios to Average Net Assets Applicable to Common Shareholders                
Total expenses 5   1.15% 6   1.61%   2.00%   1.32%     1.29%   1.26%  
Total expenses after fees waived and paid indirectly 5   1.12% 6   1.59%   2.00%   1.32%     1.29%   1.26%  
Total expenses after fees waived and paid indirectly and excluding                
    interest expense 5   1.11% 6   1.44%   1.48%   1.29%     1.29%   1.26%  
Net investment income 5   5.67% 6   12.45%   10.79%   9.38%     9.70%   9.23%  
Dividends to Preferred Shareholders   0.60% 6   1.09%   3.03%   3.29%     2.84%   1.71%  
Net investment income to Common Shareholders   5.07% 6   11.36%   7.76%   6.09%     6.86%   7.52%  
      Supplemental Data                
Net assets applicable to Common Shareholders, end of period (000)   $ 107,253   $ 96,048   $ 76,430   $ 201,155   $ 228,734   $ 229,850  
Preferred Shares outstanding at $25,000 liquidation preference,                
    end of period (000)   $ 40,250   $ 40,250   $ 68,250   $ 136,500   $ 136,500   $ 136,500  
Borrowings outstanding, end of period (000)   $ 2,663   $ 4,972   $ 4,024   $ 590        
Average borrowings outstanding, during the period (000)   $ 2,442   $ 5,321   $ 25,692   $ 2,690        
Portfolio turnover   28%   36%   119%   88%     19%   25%  
Asset coverage per Preferred Share at $25,000 liquidation preference,                
    end of period   $ 91,622   $ 84,663   $ 53,009   $ 61,846   $ 66,907   $ 67,115  

1 Based on average shares outstanding.
2 A portion of the dividends from net investment income may be deemed a tax return of capital or net realized gain at fiscal year end.
3 Total investment returns based on market price, which can be significantly greater or lesser than the net asset value, may result in substantially different returns.
Where applicable, total investment returns exclude the effects of any sales charges and include the reinvestment of dividends and distributions.
4 Aggregate total investment return.
5 Do not reflect the effect of dividends to Preferred Shareholders.
6 Annualized.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

43


Financial Highlights       BlackRock Credit Allocation Income Trust II, Inc. (PSY)  
  Six Months              
  Ended                 
  April 30, 2010     Year Ended October 31,      
  (Unaudited)   2009   2008   2007     2006   2005  
      Per Share Operating Performance                
Net asset value, beginning of period   $ 10.03   $ 7.96   $ 19.93   $ 22.36   $ 22.26   $ 23.48  
Net investment income 1   0.34   1.11   1.73   2.02     2.03   2.09  
Net realized and unrealized gain (loss)   1.46   2.17   (11.84)   (2.35)     0.32   (0.91)  
Dividends to Preferred Shareholders                
    from net investment income   (0.03)   (0.09)   (0.49)   (0.73)     (0.65)   (0.40)  
Net increase (decrease) from investment operations   1.77   3.19   (10.60)   (1.06)     1.70   0.78  
Dividends and distributions to Common Shareholders from:                
    Net investment income   (0.45) 2   (1.12)   (1.15)   (1.16)     (1.51)   (2.00)  
    Tax return of capital                 (0.00) 3   (0.22)   (0.21)     (0.09)    
Total dividends and distributions   (0.45)   (1.12)   (1.37)   (1.37)     (1.60)   (2.00)  
Net asset value, end of period   $ 11.35   $ 10.03   $ 7.96   $ 19.93   $ 22.36   $ 22.26  
Market price, end of period   $ 10.35   $ 8.90   $ 8.10   $ 16.94   $ 20.12   $ 21.20  
      Total Investment Return 4                
Based on net asset value   18.47% 5   48.36%   (55.71)%   (4.35)%     8.77%   3.73%  
Based on market price   21.75% 5   29.37%   (46.97)%   (9.65)%     2.77%   1.43%  
      Ratios to Average Net Assets Applicable to Common Shareholders                
Total expenses 6   1.05% 7   1.41%   1.90%   1.27%     1.23%   1.20%  
Total expenses after fees waived and paid indirectly 6   1.03% 7   1.41%   1.90%   1.27%     1.23%   1.20%  
Total expenses after fees waived and paid indirectly and excluding                
    interest expense 6   1.02% 7   1.33%   1.40%   1.23%     1.23%   1.20%  
Net investment income 6   6.53% 7   15.05%   10.71%   9.29%     9.26%   8.96%  
Dividends to Preferred Shareholders   0.59% 7   1.19%   3.04%   3.34%     2.96%   1.73%  
Net investment income to Common Shareholders   5.94% 7   13.86%   7.67%   5.95%     6.30%   7.23%  
      Supplemental Data                
Net assets applicable to Common Shareholders, end of period (000)   $ 463,328   $ 409,293   $ 323,132   $ 809,411   $ 907,897   $ 903,601  
Preferred Shares outstanding at $25,000 liquidation preference,                
    end of period (000)   $ 169,025   $ 169,025   $ 275,000   $ 550,000   $ 550,000   $ 550,000  
Borrowings outstanding, end of period (000)   $ 7,707   $ 9,511   $ 54,369          
Average borrowings outstanding, during the period (000)   $ 5,817   $ 15,842   $ 94,908   $ 14,375        
Portfolio turnover   37%   16%   120%   81%     18%   28%  
Asset coverage per Preferred Share at $25,000 liquidation preference,                
    end of period   $ 93,539   $ 85,547   $ 54,408   $ 61,817   $ 66,294   $ 66,077  

1 Based on average shares outstanding.
2 A portion of the dividends from net investment income may be deemed a tax return of capital or net realized gain at fiscal year end.
3 Amount is less than $(0.01) per share.
4 Total investment returns based on market price, which can be significantly greater or lesser than the net asset value, may result in substantially different returns.
Where applicable, total investment returns exclude the effects of any sales charges and include the reinvestment of dividends and distributions.
5 Aggregate total investment return.
6 Do not reflect the effect of dividends to Preferred Shareholders.
7 Annualized.

See Notes to Financial Statements.

44 SEMI-ANNUAL REPORT

APRIL 30, 2010


Financial Highlights         BlackRock Credit Allocation Income Trust III (BPP)  
      Period          
  Six Months   Year   January 1,          
  Ended      Ended   2008 to          
  April 30, 2010   October 31,   October 31,     Year Ended December 31,    
  (Unaudited)   2009   2008   2007   2006   2005   2004  
      Per Share Operating Performance                
Net asset value, beginning of period   $ 11.05   $ 8.77   $ 19.47   $ 24.52   $ 24.43   $ 25.88   $ 25.58  
Net investment income   0.34 1   1.09 1   1.48 1   2.05   2.05   2.11   2.22  
Net realized and unrealized gain (loss)   1.00   2.40   (10.74)   (4.72)   0.62   (0.82)   0.33  
Dividends and distributions to Preferred Shareholders from:                
    Net investment income   (0.00) 2   (0.03)   (0.31)   (0.62)   (0.46)   (0.26)   (0.16)  
    Net realized gain           (0.12)   (0.13)   (0.02)  
Net increase (decrease) from investment operations   1.34   3.46   (9.57)   (3.29)   2.09   0.90   2.37  
Dividends and distributions to Common Shareholders from:                
    Net investment income   (0.44) 3   (0.95)   (0.83)   (1.59)   (1.58)   (1.74)   (2.00)  
    Net realized gain         (0.02)   (0.42)   (0.61)   (0.07)  
    Tax return of capital     (0.23)   (0.30)   (0.15)        
Total dividends and distributions   (0.44)   (1.18)   (1.13)   (1.76)   (2.00)   (2.35)   (2.07)  
Net asset value, end of period   $ 11.95   $ 11.05   $ 8.77   $ 19.47   $ 24.52   $ 24.43   $ 25.88  
Market price, end of period   $ 10.78   $ 9.94   $ 8.51   $ 17.31   $ 26.31   $ 24.20   $ 25.39  
      Total Investment Return 4                
Based on net asset value   12.74% 5   47.16%   (51.22)% 5   (13.86)%   8.89%   3.81%   10.15%  
Based on market price   13.05% 5   36.42%   (46.76)% 5   (28.62)%   17.98%   4.83%   11.01%  
      Ratios to Average Net Assets Applicable to Common Shareholders              
Total expenses 6   1.11% 7   1.66%   1.96% 7   1.46%   1.62%   1.51%   1.44%  
Total expenses after fees waived and before fees                
    paid indirectly 6   1.09% 7   1.64%   1.96% 7   1.45%   1.62%   1.51%   1.44%  
Total expenses after fees waived and paid indirectly 6   1.08% 7   1.64%   1.96% 7   1.45%   1.62%   1.51%   1.44%  
Total expenses after fees waived and paid indirectly                
    and excluding interest expense 6   1.08% 7   1.39%   1.39% 7   1.24%   1.25%   1.22%   1.19%  
Net investment income 6   6.09% 7   13.08%   10.53% 7   8.90%   8.46%   8.37%   8.66%  
Dividends to Preferred Shareholders   0.08% 7   0.38%   2.19% 7   2.70%   1.89%   1.27%   0.62%  
Net investment income to Common Shareholders   6.01% 7   12.70%   8.34% 7   6.20%   6.58%   7.10%   8.04%  
      Supplemental Data                
Net assets applicable to Common Shareholders,                
    end of period (000)   $ 220,603   $ 204,133   $ 161,311   $ 358,017   $ 449,995   $ 447,190   $ 473,809  
Preferred Shares outstanding at $25,000                
    liquidation preference, end of period (000)   $ 70,425   $ 70,425   $ 110,400   $ 220,800   $ 220,800   $ 220,800   $ 220,800  
Borrowings outstanding, end of period (000)     $ 13,235   $ 44,281          
Average borrowings outstanding, during the period (000)   $ 145   $ 16,330   $ 51,995   $ 903   $ 1,303   $ 2,904   $ 782  
Portfolio turnover   31%   16%   121%   97%   91%   77%   88%  
Asset coverage per Preferred Share at $25,000                
    liquidation preference, end of period   $ 103,312   $ 97,465   $ 61,540   $ 65,554   $ 75,965   $ 75,642   $ 78,650  

1 Based on average shares outstanding.
2 Amount is less than $(0.01) per share.
3 A portion of the dividends from net investment income may be deemed a tax return of capital or net realized gain at fiscal year end.
4 Total investment returns based on market price, which can be significantly greater or lesser than the net asset value, may result in substantially different returns.
Where applicable, total investment returns exclude the effects of any sales charges and include the reinvestment of dividends and distributions.
5 Aggregate total investment return.
6 Do not reflect the effect of dividends to Preferred Shareholders.
7 Annualized.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

45


Financial Highlights   BlackRock Credit Allocation Income Trust IV (BTZ)  
                Period  
  Six Months         December 27,  
  Ended            2006 1 to     
      Year Ended October 31,    
  April 30, 2010       October 31,  
  (Unaudited)       2009   2008             2007       
      Per Share Operating Performance            
Net asset value, beginning of period   $ 12.64   $ 10.59   $ 21.39   $ 23.88 2  
Net investment income   0.37 3     0.99 3   1.33 3   1.25  
Net realized and unrealized gain (loss)   1.59     2.54   (10.06)   (1.86)  
Dividends to Preferred Shareholders from net investment income   (0.03)     (0.07)   (0.33)   (0.31)  
Net increase (decrease) from investment operations   1.93     3.46   (9.06)   (0.92)  
Dividends and distributions to Common Shareholders from:            
    Net investment income   (0.60) 4     (0.93)   (0.90)   (0.93)  
    Tax return of capital                   (0.48)   (0.84)   (0.47)  
Total dividends and distributions   (0.60)     (1.41)   (1.74)   (1.40)  
Capital charge with respect to issuance of:            
    Common Shares           (0.04)  
    Preferred Shares           (0.13)  
Total capital charges           (0.17)  
Net asset value, end of period   $ 13.97   $ 12.64   $ 10.59   $ 21.39  
Market price, end of period   $ 12.59   $ 10.96   $ 9.36   $ 18.65  
      Total Investment Return 5            
Based on net asset value   16.29% 6     41.06%   (44.27)%   (4.42)% 6  
Based on market price   20.86% 6     38.38%   (43.51)%   (20.34)% 6  
      Ratios to Average Net Assets Applicable to Common Shareholders            
Total expenses 7   1.12% 8     1.60%   1.65%   1.90% 8  
Total expenses after fees waived and paid indirectly 7   1.10% 8     1.58%   1.65%   1.88% 8  
Total expenses after fees waived and paid indirectly and excluding interest expense 7   1.06% 8     1.24%   1.21%   1.04% 8  
Net investment income 7   5.69% 8     9.93%   7.63%   6.50% 8  
Dividends to Preferred Shareholders   0.51% 8     0.74%   1.89%   1.64% 8  
Net investment income to Common Shareholders   5.18% 8     9.19%   5.74%   4.86% 8  
      Supplemental Data            
Net assets applicable to Common Shareholders, end of period (000)   $ 723,867   $ 654,999   $ 548,612   $ 1,108,534  
Preferred Shares outstanding at $25,000 liquidation preference, end of period (000)   $ 231,000   $ 231,000   $ 231,000   $ 462,000  
Borrowings outstanding, end of period (000)   $ 68,654   $ 61,576   $ 223,512   $ 88,291  
Average borrowings outstanding, during the period (000)   $ 47,478   $ 76,521   $ 107,377   $ 96,468  
Portfolio turnover   30%     30%   126%   35%  
Asset coverage per Preferred Share at $25,000 liquidation preference, end of period   $ 103,345   $ 95,892   $ 84,384   $ 89,737  

1 Commencement of operations.
2 Net asset value, beginning of period, reflects a deduction of $1.12 per share sales charge from initial offering price of $25.00 per share.
3 Based on average shares outstanding.
4 A portion of the dividends from net investment income may be deemed a tax return of capital or net realized gain at fiscal year end.
5 Total investment returns based on market price, which can be significantly greater or lesser than the net asset value, may result in substantially different returns.
Where applicable, total investment returns exclude the effects of any sales charges and include the reinvestment of dividends and distributions.
6 Aggregate total investment return.
7 Do not reflect the effect of dividends to Preferred Shareholders.
8 Annualized.

See Notes to Financial Statements.

46 SEMI-ANNUAL REPORT

APRIL 30, 2010


Financial Highlights         BlackRock Floating Rate Income Trust (BGT)  
  Six Months     Period           Period  
  Ended      Year   January 1,           August 30,  
  April 30,     Ended   2008 to           2004 1 to  
        Year Ended December 31,      
  2010       October 31,   October 31,           December 31,  
  (Unaudited)    2009   2008   2007   2006     2005   2004  
      Per Share Operating Performance                  
Net asset value, beginning of period   $ 13.29   $ 11.24   $ 17.71   $ 19.11   $ 19.13   $ 19.21   $ 19.10 2  
Net investment income   0.47 3   0.98 3   1.42 3   2.03   1.99     1.64   0.33  
Net realized and unrealized gain (loss)   0.99   2.72   (6.62)   (1.39)   (0.06)     (0.17)   0.35  
Dividends and distributions to Preferred Shareholders from:                  
    Net investment income   (0.02)   (0.04)   (0.24)   (0.54)   (0.48)     (0.33)   (0.04)  
    Net realized gain           (0.01)           (0.00) 4    
Net increase (decrease) from investment operations   1.44   3.66   (5.44)   0.10   1.44     1.14   0.64  
Dividends and distributions to Common Shareholders from:                  
    Net investment income   (0.41)   (1.19)   (1.03)   (1.14)   (1.44)     (1.22)   (0.37)  
    Net realized gain           (0.02)           (0.00) 4    
    Tax return of capital     (0.42)     (0.36)          
Total dividends and distributions   (0.41)   (1.61)   (1.03)   (1.50)   (1.46)     (1.22)   (0.37)  
Capital charges with respect to issuance of:                  
    Common Shares                 (0.04)  
    Preferred Shares                 (0.12)  
Total capital charges                 (0.16)  
Net asset value, end of period   $ 14.32   $ 13.29   $ 11.24   $ 17.71   $ 19.11   $ 19.13   $ 19.21  
Market price, end of period   $ 15.00   $ 12.58   $ 9.63   $ 15.78   $ 19.27   $ 17.16   $ 18.63  
      Total Investment Return 5                  
Based on net asset value   10.90% 6   39.51%   (31.62)% 6   0.98%   7.93%     6.63%   2.57% 6  
Based on market price   22.72% 6   54.14%   (34.24)% 6   (10.92)%   21.31%     (1.34)%   (5.00)% 6  
      Ratios to Average Net Assets Applicable to Common Shareholders                
Total expenses 7   1.41% 8   1.96%   2.22% 8   1.67%   1.75%     1.56%   1.26% 8  
Total expenses after fees waived and paid indirectly 7   1.22% 8   1.68%   1.89% 8   1.33%   1.43%     1.23%   0.97% 8  
Total expenses after fees waived and paid indirectly                  
    and excluding interest expense 7   1.12% 8   1.24%   1.21% 8   1.16%   1.19%     1.15%   0.97% 8  
Net investment income 7   6.91% 8   8.92%   10.56% 8   10.83%   10.38%     8.52%   5.04% 8  
Dividends to Preferred Shareholders   0.27% 8   0.38%   1.75% 8   2.88%   2.51%     1.71%   0.62% 8  
Net investment income to Common Shareholders   6.64% 8   8.54%   8.81% 8   7.95%   7.87%     6.81%   4.42% 8  
      Supplemental Data                  
Net assets applicable to Common Shareholders,                  
    end of period (000)   $ 337,338   $ 312,872   $ 264,590   $ 417,086   $ 449,065   $ 449,219   $ 451,126  
Preferred Shares outstanding at $25,000                  
    liquidation preference, end of period (000)   $ 58,800   $ 58,800   $ 58,800   $ 243,450   $ 243,450   $ 243,450   $ 243,450  
Borrowings outstanding, end of period (000)   $ 37,000   $ 14,000   $ 123,150     $ 26,108        
Average borrowings outstanding during the period (000)   $ 22,264   $ 53,156   $ 71,780   $ 10,524   $ 19,562   $ 10,722   $ 114  
Portfolio turnover   52%   42%   25%   41%   50%     46%   11%  
Asset coverage per Preferred Share at $25,000                  
    liquidation preference, end of period   $ 168,431   $ 158,029   $ 137,505   $ 67,849   $ 73,810   $ 71,139   $ 71,330  

1 Commencement of operations. This information includes the initial investment by BlackRock Funding, Inc.
2 Net asset value, beginning of period, reflects a deduction of $0.90 per share sales charge from initial offering price of $20.00 per share.
3 Based on average shares outstanding.
4 Amount is less than $(0.01) per share.
5 Total investment returns based on market price, which can be significantly greater or lesser than the net asset value, may result in substantially different returns.
Where applicable, total investment returns exclude the effects of any sales charges and include the reinvestment of dividends and distributions.
6 Aggregate total investment return.
7 Do not reflect the effect of dividends to Preferred Shareholders.
8 Annualized.

See Notes to Financial Statements.

SEMI-ANNUAL REPORT

APRIL 30, 2010

47


Notes to Financial Statements (Unaudited)

1. Organization and Significant Accounting Policies:

BlackRock Credit Allocation Income Trust I, Inc. (formerly BlackRock
Preferred and Corporate Income Strategies Fund, Inc.) (“PSW”) and
BlackRock Credit Allocation Income Trust II, Inc. (formerly BlackRock
Preferred Income Strategies Fund, Inc.) (“PSY”) are registered as diversi-
fied, closed-end management investment companies under the Investment
Company Act of 1940, as amended (the “1940 Act”). BlackRock Credit
Allocation Income Trust III (formerly BlackRock Preferred Opportunity Trust)
(“BPP”), BlackRock Credit Allocation Income Trust IV (formerly BlackRock
Preferred and Equity Advantage Trust) (“BTZ”) and BlackRock Floating Rate
Income Trust (formerly BlackRock Global Floating Rate Income Trust)
(“BGT”) are registered as non-diversified, closed-end management invest-
ment companies under the 1940 Act. PSW and PSY are organized as
Maryland corporations. BPP, BTZ and BGT are organized as Delaware
statutory trusts. PSW, PSY, BPP, BTZ and BGT are collectively referred to as
the “Funds” or individually as the “Fund.” The Funds’ financial statements
are prepared in conformity with accounting principles generally accepted
in the United States of America (“US GAAP”), which may require the use
of management accruals and estimates. Actual results may differ from
these estimates. The Board of Directors and Board of Trustees of the
Funds, as applicable, are referred to throughout this report as the “Board
of Directors” or the “Board.” The Funds determine and make available for
publication the net asset values of their Common Shares on a daily basis.

The following is a summary of significant accounting policies followed by
the Funds:

Valuation: The Funds’ policy is to value their financial investments at mar-
ket value using independent dealers or pricing services selected under the
supervision of the Board. The Funds value their bond investments on the
basis of last available bid prices or current market quotations provided by
dealers or pricing services. Floating rate loan interests are valued at the
mean of the bid prices from one or more brokers or dealers as obtained
from a pricing service. In determining the value of a particular investment,
pricing services may use certain information with respect to transactions in
such investments, quotations from dealers, pricing matrixes, market trans-
actions in comparable investments, various relationships observed in the
market between investments and calculated yield measures based on valu-
ation technology commonly employed in the market for such investments.
Financial futures contracts traded on exchanges are valued at their last
sale price. Swap agreements are valued utilizing quotes received daily by
the Funds’ pricing service or through brokers, which are derived using daily
swap curves and models that incorporate a number of market data factors,
such as discounted cash flows and trades and values of the underlying
reference instruments. Investments in open-end investment companies are
valued at net asset value each business day. Short-term securities with
remaining maturities of 60 days or less may be value at amortized cost,
which approximates fair value.

Securities and other assets and liabilities denominated in foreign curren-
cies are translated into US dollars using exchange rates determined as of
the close of business on the New York Stock Exchange (“NYSE”). Foreign
currency exchange contracts are valued at the mean between the bid and
ask prices and are determined as of the close of business on the NYSE.

Interpolated values are derived when the settlement date of the contract is
an interim date for which quotations are not available.

Equity investments traded on a recognized securities exchange or the
NASDAQ Global Market System are valued at the last reported sale price
that day or the NASDAQ official closing price, if applicable. For equity
investments traded on more than one exchange, the last reported sale
price on the exchange where the stock is primarily traded is used. Equity
investments traded on a recognized exchange for which there were no sales
on that day are valued at the last available bid (long positions) or ask
(short positions) price. If no bid or ask price is available, the prior day’s
price will be used, unless it is determined that such prior day’s price no
longer reflects the fair value of the security.

Exchange-traded options are valued at the mean between the last bid
and ask prices at the close of the options market in which the options
trade. An exchange-traded option for which there is no mean price is val-
ued at the last bid (long positions) or ask (short positions) price. If no bid
or ask price is available, the prior day’s price will be used, unless it is
determined that the prior day’s price no longer reflects the fair value of the
option. Over-the-counter (“OTC”) options and swaptions are valued by an
independent pricing service using a mathematical model which incorpo-
rates a number of market data factors, such as the trades and prices of
the underlying instruments.

In the event that application of these methods of valuation results in a
price for an investment which is deemed not to be representative of the
market value of such investment or is not available, the investment will be
valued by a method approved by the Funds’ Board as reflecting fair value
(“Fair Value Assets”). When determining the price for Fair Value Assets, the
investment advisor and/or the sub-advisor seeks to determine the price
that the Funds might reasonably expect to receive from the current sale
of that asset in an arm’s-length transaction. Fair value determinations
shall be based upon all available factors that the investment advisor
and/or sub-advisor deems relevant. The pricing of all Fair Value Assets
is subsequently reported to the Board or a committee thereof.

Generally, trading in foreign instruments is substantially completed
each day at various times prior to the close of business on the NYSE.
Occasionally, events affecting the values of such instruments may occur
between the foreign market close and the close of business on the NYSE
that may not be reflected in the computation of the Fund’s net assets. If
events (for example, a company announcement, market volatility or a nat-
ural disaster) occur during such periods that are expected to materially
affect the value of such instruments, those instruments may be Fair Value
Assets and be valued at their fair value, as determined in good faith by
the Board or by the investment advisor using a pricing service and/or
procedures approved by the Board.

Foreign Currency Transactions: The Funds’ books and records are main-
tained in US dollars. Foreign currency amounts are translated into US
dollars as follows: (i) market value of investment securities, assets and
liabilities at the current rate of exchange; and (ii) purchases and sales of
investment securities, income and expenses at the rates of exchange pre-
vailing on the respective dates of such transactions. Generally, when the

48 SEMI-ANNUAL REPORT

APRIL 30, 2010


Notes to Financial Statements (continued)

US dollar rises in value against foreign currency, the Funds’ investments
denominated in that currency will lose value because its currency is worth
fewer US dollars; the opposite effect occurs if the US dollar falls in
relative value.

The Funds report foreign currency related transactions as components of
realized gain (loss) for financial reporting purposes, whereas such compo-
nents are treated as ordinary income for federal income tax purposes.

Capital Trusts and Trust Preferreds: These securities are typically issued by
corporations, generally in the form of interest-bearing notes with preferred
securities characteristics, or by an affiliated business trust of a corporation,
generally in the form of beneficial interests in subordinated debentures or
similarly structured securities. The securities can be structured as either
fixed or adjustable coupon securities that can have either a perpetual or
stated maturity date. Dividends can be deferred without creating an event
of default or acceleration, although maturity cannot take place unless all
cumulative payment obligations have been met. The deferral of payments
does not affect the purchase or sale of these securities in the open market.
Payments on these securities are treated as interest rather than dividends
for federal income tax purposes. These securities can have a rating that is
slightly below that of the issuing company’s senior debt securities.

Preferred Stock: Certain Funds may invest in preferred stocks. Preferred
stock has a preference over common stock in liquidation (and generally
in receiving dividends as well) but is subordinated to the liabilities of the
issuer in all respects. As a general rule, the market value of preferred stock
with a fixed dividend rate and no conversion element varies inversely with
interest rates and perceived credit risk, while the market price of convert-
ible preferred stock generally also reflects some element of conversion
value. Because preferred stock is junior to debt securities and other obli-
gations of the issuer, deterioration in the credit quality of the issuer will
cause greater changes in the value of a preferred stock than in a more
senior debt security with similar stated yield characteristics. Unlike interest
payments on debt securities, preferred stock dividends are payable only if
declared by the issuer’s board of directors. Preferred stock also may be
subject to optional or mandatory redemption provisions.

Floating Rate Loans: The Funds may invest in floating rate loan interests
that are issued to companies (the “borrower”) by banks, other financial
institutions, and privately and publicly offered corporations (the “lender”).
Floating rate loan interests are generally non-investment grade, often
involve borrowers whose financial condition is troubled or uncertain and
companies that are highly leveraged. The Funds may invest in obligations of
borrowers who are in bankruptcy proceedings. Floating rate loan interests
may include fully funded term loans or revolving lines of credit. Floating
rate loan interests are typically senior in the corporate capital structure of
the issuer. Floating rate loan interests generally pay interest at rates that
are periodically determined by reference to a base lending rate plus a pre-
mium. The base lending rates are generally the lending rate offered by one
or more European banks, such as LIBOR (London Interbank Offered Rate),
the prime rate offered by one or more US banks or the certificate of
deposit rate. Floating rate loan interests may involve foreign borrowers, and
investments may be denominated in foreign currencies. The Funds consider
these investments to be investments in debt securities for purposes of their
investment policies.

When the Funds buy a floating rate loan interest it may receive a facility
fee and when it sells a floating rate loan interest it may pay a facility fee.
On an ongoing basis, the Funds may receive a commitment fee based on
the undrawn portion of the underlying line of credit amount of a floating
rate loan interest. The Funds earn and/or pay facility and other fees on
floating rate loan interests, which are shown as facility and other fees in
the Statements of Operations. Facility and commitment fees are typically
amortized to income over the term of the loan or term of the commitment,
respectively. Consent and amendment fees are recorded to income as
earned. Prepayment penalty fees, which may be received by the Funds
upon the prepayment of a floating rate loan interest by a borrower, are
recorded as realized gains. The Funds may invest in multiple series or
tranches of a loan. A different series or tranche may have varying terms
and carry different associated risks.

Floating rate loan interests are usually freely callable at the issuer’s option.
The Funds may invest in such loans in the form of participations in loans
(“Participations”) and assignments of all or a portion of loans from third
parties. Participations typically will result in the Funds having a contractual
relationship only with the lender, not with the borrower. The Funds will have
the right to receive payments of principal, interest and any fees to which
it is entitled only from the lender selling the Participation and only upon
receipt by the lender of the payments from the borrower. In connection with
purchasing Participations, the Funds generally will have no right to enforce
compliance by the borrower with the terms of the loan agreement, nor any
rights of offset against the borrower, and the Funds may not benefit directly
from any collateral supporting the loan in which it has purchased the
Participation. As a result, the Funds will assume the credit risk of both the
borrower and the lender that is selling the Participation. The Funds’ invest-
ment in loan participation interests involves the risk of insolvency of the
financial intermediaries who are parties to the transactions. In the event
of the insolvency of the lender selling the Participation, the Funds may
be treated as a general creditor of the lender and may not benefit from
any offset between the lender and the borrower.

Reverse Repurchase Agreements: The Funds may enter into reverse
repurchase agreements with qualified third party broker-dealers. In a
reverse repurchase agreement, the Funds sell securities to a bank or bro-
ker-dealer and agrees to repurchase the same securities at a mutually
agreed upon date and price. Certain agreements have no stated maturity
and can be terminated by either party at any time. Interest on the value of
the reverse repurchase agreements issued and outstanding is based upon
competitive market rates determined at the time of issuance. The Funds
may utilize reverse repurchase agreements when it is anticipated that the
interest income to be earned from the investment of the proceeds of the
transaction is greater than the interest expense of the transaction. Reverse
repurchase agreements involve leverage risk and also the risk that the
market value of the securities that the Funds are obligated to repurchase
under the agreement may decline below the repurchase price. In the event
the buyer of securities under a reverse repurchase agreement files for
bankruptcy or becomes insolvent, the Funds’ use of the proceeds of the
agreement may be restricted while the other party, or its trustee or receiver,
determines whether or not to enforce the Funds’ obligation to repurchase
the securities.

SEMI-ANNUAL REPORT

APRIL 30, 2010

49


Notes to Financial Statements (continued)

Defensive Positions: Each of PSW, PSY, BPP and BTZ may vary their invest-
ment policies for temporary defensive purposes during periods in which the
investment advisor believes that conditions in the securities markets or
other economic, financial or political conditions warrant. Under such
conditions, the Funds for temporary defensive purposes may invest up to
100% of its total assets in, as applicable and described in each Fund’s
prospectus, U.S. government securities, certificates of deposit, repurchase
agreements that involve purchases of debt securities, bankers’ acceptances
and other bank obligations, commercial paper, money market funds and/or
other debt securities deemed by the investment advisor to be consistent
with a defensive posture, or may hold its assets in cash.

Zero-Coupon Bonds: The Fund may invest in zero-coupon bonds, which are
normally issued at a significant discount from face value and do not pro-
vide for periodic interest payments. Zero-coupon bonds may experience
greater volatility in market value than similar maturity debt obligations
which provide for regular interest payments.

Segregation and Collateralization: In cases in which the 1940 Act and the
interpretive positions of the Securities and Exchange Commission (“SEC”)
require that the Funds either deliver collateral or segregate assets in con-
nection with certain investments (e.g, financial futures contracts, foreign
currency exchange contracts and swaps), or certain borrowings (e.g.,
reverse repurchase agreements and loan payable) the Funds will, consis-
tent with SEC rules and/or certain interpretive letters issued by the SEC,
segregate collateral or designate on its books and records cash or other
liquid securities having a market value at least equal to the amount that
would otherwise be required to be physically segregated. Furthermore,
based on requirements and agreements with certain exchanges and third
party broker-dealers, each party has requirements to deliver/deposit
securities as collateral for certain investments.

Investment Transactions and Investment Income: For financial reporting
purposes, investment transactions are recorded on the dates the trans-
actions are entered into (the trade dates). Realized gains and losses
on investment transactions are determined on the identified cost basis.
Dividend income is recorded on the ex-dividend dates. Dividends from
foreign securities where the ex-dividend date may have passed are sub-
sequently recorded when the Funds have determined the ex-dividend date.
Under the applicable foreign tax laws, a withholding tax at various rates
may be imposed on capital gains, dividends and interest. Upon notification
from issuers, some of the dividend income received from a real estate
investment trust may be redesignated as a reduction of cost of the related
investment and/or realized gain. Interest income, including amortization
of premium and accretion of discount on debt securities, is recognized
on the accrual basis.

Dividends and Distributions: Dividends from net investment income are
declared and paid monthly. Distributions of capital gains are recorded on
the ex-dividend dates. If the total dividends and distributions made in any
tax year exceeds net investment income and accumulated realized capital
gains, a portion of the total distribution may be treated as a tax return of
capital. The amount and timing of dividends and distributions are deter-
mined in accordance with federal income tax regulations, which may differ
from US GAAP.

Income Taxes: It is each Fund’s policy to comply with the requirements of
the Internal Revenue Code of 1986, as amended, applicable to regulated
investment companies (“RIC”) and to distribute substantially all of its tax-
able income to its shareholders. Therefore, no federal income tax provision
is required.

BGT has a wholly owned taxable subsidiary organized as a limited liability
company (the “Taxable Subsidiary”), which holds one of the investments
listed in the Schedule of Investments. The Taxable Subsidiary allows the
Fund to indirectly hold an investment that is organized as an operating
partnership while still satisfying RIC tax requirements. Income earned on
the investment held by the Taxable Subsidiary is taxable to such subsidiary.
The income tax expense, if any, of the Taxable Subsidiary is reflected in the
market value of the investment held by the Taxable Subsidiary.

Each Fund files US federal and various state and local tax returns. No
income tax returns are currently under examination. The statute of lim-
itations on PSW’s and PSY’s US federal tax returns remains open for the
four years ended October 31, 2009. The statute of limitations on BPP’s
and BGT’s US federal tax returns remains open for the two years ended
December 31, 2007, the period ended October 31, 2008 and year ended
October 31, 2009. The statute of limitations on BTZ’s US Federal tax
returns remains open for the two years ended October 31, 2009 and the
period ended October 31, 2007. The statutes of limitations on the Funds’
state and local tax returns may remain open for an additional year depend-
ing upon the jurisdiction. There are no uncertain tax positions that require
recognition of a tax liability.

Recent Accounting Standard: In January 2010, the Financial Accounting
Standards Board issued amended guidance to improve disclosure about
fair value measurements, which will require additional disclosures about
transfers into and out of Levels 1 and 2 and separate disclosures about
purchases, sales, issuances and settlements in the reconciliation for fair
value measurements using significant unobservable inputs (Level 3). It
also clarifies existing disclosure requirements relating to the levels of
disaggregation for fair value measurement and inputs and valuation tech-
niques used to measure fair value. The amended guidance is effective for
financial statements for fiscal years beginning after December 15, 2009,
and interim periods within those fiscal years, except for disclosures about
purchases, sales, issuances and settlements in the rollforward of activity
in Level 3 fair value measurements, which are effective for fiscal years
beginning after December 15, 2010 and for interim periods within those
fiscal years. The impact of this guidance on the Fund's financial statements
and disclosures is currently being assessed.

Deferred Compensation and BlackRock Closed-End Share Equivalent
Investment Plan: Under the deferred compensation plan approved by each
Fund’s Board, non-interested Directors (“Independent Directors”) may defer
a portion of their annual complex-wide compensation. Deferred amounts
earn an approximate return as though equivalent dollar amounts had been
invested in common shares of other certain BlackRock Closed-End Funds
selected by the Independent Directors. This has approximately the same
economic effect for the Independent Directors as if the Independent
Directors had invested the deferred amounts directly in other certain
BlackRock Closed-End Funds.

50 SEMI-ANNUAL REPORT

APRIL 30, 2010


Notes to Financial Statements (continued)

The deferred compensation plan is not funded and obligations thereunder
represent general unsecured claims against the general assets of each
Fund. Each Fund may, however, elect to invest in common shares of other
certain BlackRock Closed-End Funds selected by the Independent Directors
in order to match its deferred compensation obligations. Investments to
cover each Fund’s deferred compensation liability, if any, are included in
other assets in the Statements of Assets and Liabilities. Dividends and dis-
tributions from the BlackRock Closed-End Fund investments under the plan
are included in income — affiliated in the Statements of Operations.

Other: Expenses directly related to a Fund are charged to the Fund. Other
operating expenses shared by several funds are pro rated among those
funds on the basis of relative net assets or other appropriate methods. The
Funds have an arrangement with the custodian whereby fees may be
reduced by credits earned on uninvested cash balances, which if applica-
ble are shown as fees paid indirectly in the Statements of Operations. The
custodian imposes fees on overdrawn cash balances, which can be offset
by accumulated credits earned or may result in additional custody charges.

2. Derivative Financial Instruments:

The Funds may engage in various portfolio investment strategies both to
increase the returns of the Funds and to economically hedge, or protect,
their exposure to certain risks such as credit risk, equity risk, interest rate
risk and foreign currency exchange rate risk. Losses may arise if the value
of the contract decreases due to an unfavorable change in the price of
the underlying instrument or if the counterparty does not perform under
the contract. The Funds may mitigate counterparty risk through master
netting agreements included within an International Swap and Derivatives
Association, Inc. (“ISDA”) Master Agreement between a Fund and sepa-
rately each of its counterparties. The ISDA Master Agreement allows each
Fund to offset with its counterparty certain derivative financial instrument’s
payables and/or receivables with collateral held with each separate coun-
terparty. The amount of collateral moved to/from applicable counterparties
is based upon minimum transfer amounts of up to $500,000. To the extent
amounts due to the Funds from their counterparties are not fully collateral-
ized, contractually or otherwise, the Funds bear the risk of loss from coun-
terparty non-performance. See Note 1 “Segregation and Collateralization”
for information with respect to collateral practices. In addition, the Fund
manages counterparty risk by entering into agreements only with counter-
parties that it believes have the financial resources to honor their obliga-
tions and by monitoring the financial stability of those counterparties.

The Fund’s maximum risk of loss from counterparty credit risk on OTC
derivatives is generally the aggregate unrealized gain in excess of any
collateral pledged by the counterparty to the Fund. For OTC options pur-
chased, the Fund bears the risk of loss in the amount of the premiums
paid and change in market value of the options should the counterparty
not perform under the contracts. Options written by the Fund do not give
rise to counterparty credit risk, as options written obligate the Fund to
perform and not the counterparty. Certain ISDA Master Agreements allow
counterparties to OTC derivatives to terminate derivative contracts prior to
maturity in the event the Fund’s net assets decline by a stated percentage
or the Fund fails to meet the terms of its ISDA Master Agreements, which
would cause the Fund to accelerate payment of any net liability owed to

the counterparty. Counterparty risk related to exchange-traded financial
futures contracts and options is minimal because of the protection
against defaults provided by the exchange on which they trade.

Financial Futures Contracts: The Funds may purchase or sell financial
futures contracts and options on financial futures contracts to gain
exposure to, or economically hedge against, changes in interest rates
(interest rate risk) or foreign currencies (foreign currency exchange rate
risk). Financial futures contracts are contracts for delayed delivery of secu-
rities or currencies at a specific future date and at a specific price or yield.
Pursuant to the contract, the Funds agree to receive from or pay to the
broker an amount of cash equal to the daily fluctuation in value of the
contract. Such receipts or payments are known as margin variation and
are recognized by the Funds as unrealized gains or losses. When the
contract is closed, the Funds record a realized gain or loss equal to the
difference between the value of the contract at the time it was opened
and the value at the time it was closed. The use of financial futures trans-
actions involves the risk of an imperfect correlation in the movements in
the price of financial futures contracts, interest or foreign currency
exchange rates and the underlying assets.

Foreign Currency Exchange Contracts: The Funds may enter into foreign
currency exchange contracts as an economic hedge against either specific
transactions or portfolio instruments or to gain exposure to foreign curren-
cies (foreign currency exchange rate risk). A foreign currency exchange con-
tract is an agreement between two parties to buy and sell a currency at a
set exchange rate on a future date. Foreign currency exchange contracts,
when used by the Funds, help to manage the overall exposure to the cur-
rency backing some of the investments held by the Funds. The contract is
marked-to-market daily and the change in market value is recorded by the
Funds as an unrealized gain or loss. When the contract is closed, the Funds
record a realized gain or loss equal to the difference between the value at
the time it was opened and the value at the time it was closed. The use of
foreign currency exchange contracts involves the risk that counterparties
may not meet the terms of the agreement or unfavorable movements in
the value of a foreign currency relative to the US dollar.

Options: The Funds may purchase and write call and put options to
increase or decrease its exposure to underlying instruments (equity risk)
and/or, in the case of options written, to generate gains from options pre-
miums. A call option gives the purchaser of the option the right (but not
the obligation) to buy, and obligates the seller to sell (when the option is
exercised), the underlying instrument at the exercise price at any time or at
a specified time during the option period. A put option gives the holder the
right to sell and obligates the writer to buy the underlying instrument at the
exercise price at any time or at a specified time during the option period.
When the Funds purchase (writes) an option, an amount equal to the pre-
mium paid (received) by the Funds is reflected as an asset (liability). The
amount of the asset (liability) is subsequently marked-to-market to reflect
the current market value of the option purchased (written).When an instru-
ment is purchased or sold through an exercise of an option, the related
premium paid (or received) is added to (or deducted from) the basis of the
instrument acquired or deducted from (or added to) the proceeds of the
instrument sold. When an option expires (or the Funds enter into a closing

SEMI-ANNUAL REPORT

APRIL 30, 2010

51


Notes to Financial Statements (continued)

transaction), the Funds realize a gain or loss on the option to the extent of
the premiums received or paid (or gain or loss to the extent the cost of the
closing transaction exceeds the premium received or paid). When the
Funds write a call option, such option is “covered,” meaning that the Funds
hold the underlying instrument subject to being called by the option coun-
terparty, or cash in an amount sufficient to cover the obligation. When the
Funds write a put option, such option is covered by cash in an amount suf-
ficient to cover the obligation.

In purchasing and writing options, the Fund bears the risk of an unfavor-
able change in the value of the underlying instrument or the risk that the
Fund may not be able to enter into a closing transaction due to an illiquid
market. Exercise of an option written could result in the Fund purchasing or
selling a security at a price different from the current market value. The
Fund may execute transactions in both listed and OTC options.

Swaps: The Funds may enter into swap agreements, in which the Funds
and a counterparty agree to make periodic net payments on a specified
notional amount. These periodic payments received or made by the Funds
are recorded in the Statements of Operations as realized gains or losses,
respectively. Any upfront fees paid are recorded as assets and any upfront
fees received are recorded as liabilities and amortized over the term of
the swap. Swaps are marked-to-market daily and changes in value are
recorded as unrealized appreciation (depreciation). When the swap is ter-
minated, the Funds will record a realized gain or loss equal to the differ-
ence between the proceeds from (or cost of) the closing transaction and
the Funds’ basis in the contract, if any. Generally, the basis of the contracts
is the premium received or paid. Swap transactions involve, to varying
degrees, elements of interest rate, credit and market risk in excess of the
amounts recognized in the Statements of Assets and Liabilities. Such risks
involve the possibility that there will be no liquid market for these agree-
ments, that the counterparty to the agreements may default on its obliga-
tion to perform or disagree as to the meaning of the contractual terms in
the agreements, and that there may be unfavorable changes in interest
rates and/or market values associated with these transactions.

Credit default swaps — The Funds may enter into credit default swaps to
manage their exposure to the market or certain sectors of the market,
to reduce its risk exposure to defaults of corporate and/or sovereign
issuers or to create exposure to corporate and/or sovereign issuers to
which it is not otherwise exposed (credit risk). The Funds enter into
credit default agreements to provide a measure of protection against
the default of an issuer (as buyer protection) and/or gain credit expo-
sure to an issuer to which it is not otherwise exposed (as seller of pro-
tection). The Funds may either buy or sell (write) credit default swaps
on single-name issuers (corporate or sovereign), a combination or bas-
ket of single name issuers or traded indexes. Credit default swaps on
single-name issuers are agreements in which the buyer pays fixed peri-
odic payments to the seller in consideration for a guarantee from the
seller to make a specific payment should a negative credit event take
place (e.g., bankruptcy, failure to pay, obligation accelerators, repudia-
tion, moratorium or restructuring). Credit default swaps on traded
indexes are agreements in which the buyer pays fixed periodic pay-
ments to the seller in consideration for a guarantee from the seller to
make a specific payment should a write-down, principal or interest
shortfall or default of all or individual underlying securities included in
the index occurs. As a buyer, if an underlying credit event occurs, the
Funds will either receive from the seller an amount equal to the
notional amount of the swap and deliver the referenced security or
underlying securities comprising of an index or receive a net settlement
of cash equal to the notional amount of the swap less the recovery
value of the security or underlying securities comprising of an index. As
a seller (writer), if an underlying credit event occurs, the Funds will
either pay the buyer an amount equal to the notional amount of the
swap and take delivery of the referenced security or underlying securi-
ties comprising of an index or pay a net settlement of cash equal to the
notional amount of the swap less the recovery value of the security or
underlying securities comprising of an index.

Derivatives Categorized by Risk Exposure:                
Fair Values of Derivative Instruments as of April 30, 2010

Asset Derivatives

  Statements of Assets              
  and Liabilities Location   PSW     PSY   BPP   BTZ   BGT  
Foreign currency exchange contracts   Unrealized appreciation on foreign              
  currency exchange contracts             $1,319,248  
Interest rate contracts*   Net unrealized appreciation/depreciation   $ 46,776   $ 71,280   $ 42,120   $ 634,102    
Equity contracts   Investments at value - unaffiliated             5,460  
Total     $ 46,776   $ 71,280   $ 42,120   $ 634,102   $1,324,708  
Liability Derivatives

  Statements of Assets              
  and Liabilities Location   PSW     PSY   BPP   BTZ   BGT  
Credit contracts   Unrealized depreciation on swaps   $ 175,918   $ 351,837   $ 175,919   $ 703,674   $ 173,967  

* Includes cumulative unrealized appreciation/depreciation of financial futures contracts as reported in the Schedules of Investments. Only the current day's margin variation is
reported within the Statements of Assets and Liabilities.

52 SEMI-ANNUAL REPORT

APRIL 30, 2010


Notes to Financial Statements (continued)                
The Effect of Derivative Instruments on the Statements of Operations                
The Effect of Derivative Instruments on the Statements of Operations
Six Months Ended April 30, 2010

Net Realized Gain (Loss) From

    PSW     PSY   BPP   BTZ     BGT  
Interest rate contracts:                  
    Financial futures contracts   $ 151,309   $ (14,840)   $ (8,662)   $ 1,179,920      
    Options*           (17,338)   (42,018)      
Foreign currency exchange contracts:                  
    Foreign currency transactions               $ 6,409,739  
Credit contracts:                  
    Swaps     (26,289)     (52,578)   (26,289)   (105,156)     (40,786)  
Equity contracts:                  
    Financial futures contracts             5,107,623      
    Options             (2,202,351)      
Total   $ 125,020   $ (67,418)   $ (52,289)   $ 3,938,018   $ 6,368,953  
Net Change in Unrealized Appreciation/Depreciation on

    PSW     PSY   BPP   BTZ     BGT  
Interest rate contracts:                  
    Financial futures contracts   $ (48,196)   $ 36,435   $ 22,607   $ (348,772)      
Foreign currency exchange contracts:                  
      Foreign currency transactions               $ 1,970,211  
Credit contracts:                  
    Swaps     (6,966)     (13,933)   (6,967)   (27,865)     275,079  
Equity contracts:                  
    Financial futures contracts             145,435      
    Options*             (661,829)     (650)  
Total   $ (55,162)   $ 22,502   $ 15,640   $ (893,031)   $ 2,244,640  
      * Includes options purchased which are shown in the net realized gain (loss) from investments and net change in unrealized appreciation/depreciation on investments.    
For the six months ended April 30, 2010, the average quarterly balance of outstanding derivative financial instruments was as follows:      
    PSW     PSY   BPP   BTZ     BGT  
Financial futures contracts:                  
    Average number of contracts purchased     48     23   13   824      
    Average notional value of contracts purchased   $ 9,719,872   $ 2,656,567   $ 1,534,270   $ 71,911,180      
Foreign currency exchange contracts:                  
    Average number of contracts — US dollars purchased                 6  
    Average number of contracts — US dollars sold                 1  
    Average US dollar amounts purchased               $91,788,735  
    Average US dollar amounts sold               $ 257,597  
Options:                  
    Average number of contracts purchased           43   103     26  
    Average number of contracts written             310      
    Average notional value of contracts purchased           $ 42,500   $ 103,000   $ 24,514  
    Average notional value of contracts written             $ 35,337,750      
Credit default swaps:                  
    Average number of contracts — buy protection     1     1   1   1      
    Average number of contracts — sell protection                 1  
    Average notional value — buy protection   $ 1,000,000   $ 2,000,000   $ 1,000,000   $ 4,000,000      
    Average notional value — sell protection               $ 2,815,694  

3. Investment Advisory Agreement and Other Transactions
with Affiliates:

The PNC Financial Services Group, Inc. ("PNC"), Bank of America
Corporation ("BAC") and Barclays Bank PLC ("Barclays") are the largest
stockholders of BlackRock, Inc. ("BlackRock"). Due to the ownership struc-
ture, PNC is an affiliate of the Funds for 1940 Act purposes, but BAC and
Barclays are not.

Each Fund entered into an Investment Advisory Agreement with BlackRock
Advisors, LLC (the “Manager”), the Funds’ investment advisor, an indirect,
wholly owned subsidiary of BlackRock, to provide investment advisory and
administration services.

The Manager is responsible for the management of each Fund’s portfolio
and provides the necessary personnel, facilities, equipment and certain

other services necessary to the operations of each Fund. For such services,
each Fund pays the Manager a monthly fee at the following annual rates
of each Fund’s average daily (weekly for BPP, BTZ and BGT) net assets
(including any assets attributable to the proceeds from the issuance
of Preferred Shares) minus the sum of accrued liabilities (other than
borrowings representing financial leverage) as follows:

PSW   0.60%  
PSY   0.60%  
BPP   0.65%  
BTZ   0.65%  
BGT   0.75%  

The Manager has voluntarily agreed to waive a portion of the investment
advisory fees or other expenses on BGT as a percentage of its average
weekly net assets as follows: 0.15% for the period September 1, 2009 to

SEMI-ANNUAL REPORT

APRIL 30, 2010

53


Notes to Financial Statements (continued)

August 31, 2010, 0.10% for the period September 1, 2010 to August 31,
2011 and 0.05% for the period September 1, 2011 to August 31,
2012. For the six months ended April 30, 2010, the Manager waived
$303,094, which is included in fees waived by advisor in the Statements
of Operations.

The Manager has voluntarily agreed to waive its advisory fees by the
amount of investment advisory fees each Fund pays to the Manager indi-
rectly through its investment in affiliated money market funds, which are
shown as fees waived by advisor in the Statements of Operations. For the
six months ended April 30, 2010, the amounts waived were as follows:

PSW   $14,257  
PSY   $48,676  
BPP   $22,496  
BTZ   $91,034  
BGT   $ 1,363  

The Manager has entered into a separate sub-advisory agreement with
BlackRock Financial Management, Inc. (“BFM”), an affiliate of the Manager.
The Manager pays BFM for services it provides, a monthly fee that is a per-
centage of the investment advisory fees paid by each Fund to the Manager.

For the six months ended April 30, 2010, the Funds reimbursed the
Manager for certain accounting services, which are included in accounting
services in the Statements of Operations. The reimbursements were
as follows:

  Accounting  
  Services  
PSW   $1,413  
PSY   $5,980  
BPP   $2,763  
BTZ   $8,925  
BGT   $3,834  

Certain officers and/or directors of the Funds are officers and/or directors
of BlackRock or its affiliates. The Funds reimburse the Manager for com-
pensation paid to the Funds’ Chief Compliance Officer.

4. Investments:

Purchases and sales of investments including paydowns, excluding short-
term securities and US government securities for the six months ended
April 30, 2010, were as follows:

  Purchases   Sales  
PSW   $ 87,203,044   $ 29,967,351  
PSY   $ 354,987,135   $ 175,962,970  
BPP   $ 161,179,639   $ 67,898,742  
BTZ   $ 486,228,429   $ 214,649,244  
BGT   $ 234,074,818   $ 218,100,549  

Purchases and sales of US government securities for the six months ended
April 30, 2010, were as follows:

  Purchases   Sales  
BTZ   $ 74,355,769    

Transactions in call options written for the six months ended April 30,
2010, were as follows:

                        BTZ    
      Premiums  
Call Options Written   Contracts     Received  
Outstanding options written, beginning of period   400   $ 828,039  
Options written   3,040     5,516,038  
Options closed   (2,654)     (4,834,709)  
Options expired   (786)     (1,509,368)  
Outstanding options written, end of period   - —   $ —  

5. Commitments:

BGT invests in floating rate loans. In connection with these investments, the
Fund may also enter into unfunded corporate loans (“commitments”).
Commitments may obligate the Fund to furnish temporary financing to a
borrower until permanent financing can be arranged. In connection with
these commitments, the Fund earns a commitment fee, typically set as a
percentage of the commitment amount. Such fee income, which is classi-
fied in the Statements of Operations as facility and other fees, is recog-
nized ratably over the commitment period. As of April 30, 2010, the Fund
had the following unfunded loan commitments:

    Value of  
  Unfunded   Underlying  
Borrower   Commitment   Loans  
Cloverhill   $517,857   $527,343  
Delphi   $368,293   $346,195  

6. Concentration, Market and Credit Risk:

PSW, PSY, BPP and BTZ invest a significant portion of its assets in securi-
ties in the financials sector and BGT invests a significant portion of its
assets in the consumer discretionary sector. Changes in economic condi-
tions affecting the financials and media sectors would have a greater
impact on the Funds and could affect the value, income and/or liquidity of
positions in such securities.

In the normal course of business, the Funds invest in securities and enter
into transactions where risks exist due to fluctuations in the market (market
risk) or failure of the issuer of a security to meet all its obligations (credit
risk). The value of securities held by the Funds may decline in response to
certain events, including those directly involving the issuers whose securi-
ties are owned by the Funds; conditions affecting the general economy;
overall market changes; local, regional or global political, social or eco-
nomic instability; and currency and interest rate and price fluctuations.
Similar to credit risk, the Funds may be exposed to counterparty risk, or
the risk that an entity with which the Funds have unsettled or open trans-
actions may default. The Funds manage counterparty risk by entering into
transactions only with counterparties that they believe have the financial
resources to honor their obligations and by monitoring the financial stability
of those counterparties. Financial assets, which potentially expose the
Funds to credit and counterparty risks, consist principally of investments
and cash due from counterparties. The extent of the Funds’ exposure to
credit and counterparty risks with respect to these financial assets is

54 SEMI-ANNUAL REPORT

APRIL 30, 2010


Notes to Financial Statements (continued)

generally approximated by their value recorded in the Funds’ Statements
of Assets and Liabilities, less any collateral held by the Funds.

7. Capital Share Transactions:

PSW and PSY are authorized to issue 200 million of $0.10 par value
shares, all of which were initially classified as Common Shares. Each Board
is authorized, however, to reclassify any unissued shares without approval
of Common Shareholders.There are an unlimited number of $0.001 par
value shares authorized for BPP, BTZ and BGT.

Common Shares

As of April 30, 2010, the shares owned by an affiliate of the Manager of
the Funds were as follows:

  Shares  
PSW   7,978  
PSY   8,299  
BTZ   4,817  
BGT   8,239  

Shares issued and outstanding during the six months ended April 30,
2010 and the year ended October 31, 2009 increased by the following
amounts as a result of dividend reinvestment:

  Six Months    
  Ended         Year Ended  
  April 30,      October 31,  
  2010        2009  
PSW   -   20,060  
PSY   -   200,878  
BPP   -   76,154  
BGT   19,562    

Shares issued and outstanding for the six months ended April 30, 2010
and the year ended October 31, 2009 remained constant for BTZ.

Preferred Shares

The Preferred Shares are redeemable at the option of each Fund, in whole
or in part, on any dividend payment date at their liquidation preference
per share plus any accumulated and unpaid dividends whether or not
declared. The Preferred Shares are also subject to mandatory redemption
at their liquidation preference plus any accumulated and unpaid dividends,
whether or not declared, if certain requirements relating to the composition
of the assets and liabilities of a Fund, as set forth in each Fund’s Articles
Supplementary (the “Governing Instrument”) are not satisfied.

From time to time in the future, each Fund may effect repurchases of its
Preferred Shares at prices below their liquidation preference as agreed
upon by the Fund and seller. Each Fund also may redeem its Preferred
Shares from time to time as provided in the applicable Governing Instru-
ment. Each Fund intends to effect such redemptions and/or repurchases
to the extent necessary to maintain applicable asset coverage require-
ments or for such other reasons as the Board may determine.

The holders of Preferred Shares have voting rights equal to the holders of
Common Shares (one vote per share) and will vote together with holders of
Common Shares (one vote per share) as a single class. However, the hold-
ers of Preferred Shares, voting as a separate class, are also entitled to
elect two Directors for each Fund. In addition, the 1940 Act requires that
along with approval by shareholders that might otherwise be required, the
approval of the holders of a majority of any outstanding Preferred Shares,
voting separately as a class would be required to (a) adopt any plan of
reorganization that would adversely affect the Preferred Shares, (b) change
a Fund’s sub-classification as a closed-end investment company or change
its fundamental investment restrictions or (c) change its business so as to
cease to be an investment company.

The Funds had the following series of Preferred Shares outstanding,
effective yields and reset frequency as of April 30, 2010:

        Reset  
    Preferred   Effective   Frequency  
  Series   Shares     Yield   Days  
PSW   M7   805     1.51%   7  
  T7   805     1.51%   7  
PSY   M7   861     1.51%   7  
  T7   861     1.51%   7  
  W7   861     1.51%   7  
  TH7   861     1.51%   7  
  F7   861     1.51%   7  
  W28   1,228     1.51%   28  
  TH28   1,228     1.51%   28  
BPP   T7   939     0.36%   7  
  W7   939     0.36%   7  
  R7   939     0.36%   7  
BTZ   T7   2,310     1.51%   7  
  W7   2,310     1.51%   7  
  R7   2,310     1.52%   7  
  F7   2,310     1.52%   7  
BGT   T7   784     1.51%   7  
  W7   784     1.51%   7  
  R7   784     1.52%   7  

Dividends on seven-day and 28-day Preferred Shares are cumulative at
a rate which is reset every seven or 28 days, respectively, based on the
results of an auction. If the Preferred Shares fail to clear the auction on an
auction date, each Fund is required to pay the maximum applicable rate
on the Preferred Shares to holders of such shares for successive dividend
periods until such time as the shares are successfully auctioned. The maxi-
mum applicable rate on the Preferred Shares is as follows: for PSW, PSY
and BGT, the higher of 125% times or 1.25% plus the Telerate/BBA LIBOR
rate; or BPP 150% of the interest equivalent of the 30-day commercial
paper ate and for BTZ, the higher of 150% times or 1.25% plus the

SEMI-ANNUAL REPORT

APRIL 30, 2010

55


Notes to Financial Statements (continued)

Telerate/BBA IBOR rate. The low, high and average dividend rates for the six
months ended April 30, 2010, were as follows:

  Series   Low   High   Average  
PSW   M7   1.46%   1.51%   1.47%  
  T7   1.46%   1.51%   1.47%  
PSY   M7   1.46%   1.51%   1.47%  
  T7   1.46%   1.51%   1.47%  
  W7   1.46%   1.51%   1.47%  
  TH7   1.46%   1.52%   1.52%  
  F7   1.47%   1.52%   1.47%  
  W28   1.48%   1.50%   1.49%  
  TH28   1.48%   1.51%   1.49%  
BPP   T7   0.15%   0.35%   0.25%  
  W7   0.15%   0.38%   0.24%  
  R7   0.15%   0.35%   0.24%  
BTZ   T7   1.46%   1.51%   1.47%  
  W7   1.46%   1.51%   1.47%  
  R7   1.46%   1.52%   1.47%  
  F7   1.46%   1.52%   1.47%  
BGT   T7   1.46%   1.51%   1.47%  
  W7   1.46%   1.51%   1.47%  
  R7   1.46%   1.51%   1.47%  

Since February 13, 2008, the Preferred Shares of the Funds failed to clear
any of their auctions. As a result, the Preferred Shares dividend rates were
reset to the maximum applicable rate, which ranged from 1.46% to 1.52%
for the six months ended April 30, 2010. A failed auction is not an event
of default for the Funds but it has a negative impact on the liquidity of
Preferred Shares. A failed auction occurs when there are more sellers of a
fund’s auction rate preferred shares than buyers. It is impossible to predict
how long this imbalance will last. A successful auction for the Funds’
Preferred Shares may not occur for some time, if ever, and even if liquidity
does resume, holders of the Preferred Shares may not have the ability
to sell the Preferred Shares at their liquidation preference.

The Funds may not declare dividends or make other distributions on
Common Shares or purchase any such shares if, at the time of the declara-
tion, distribution or purchase, asset coverage with respect to the outstand-
ing Preferred Shares is less than 200%.

During the year ended October 31, 2009 the Funds announced the follow-
ing redemptions, as of the date indicated, of Preferred Shares at a price of
$25,000 per share plus any accrued and unpaid dividends through the
redemption dates:

March 26, 2009          
    Redemption   Shares   Aggregate  
  Series   Date   Redeemed   Principle  
PSY   M7   4/14/09   107   $2,675,000  
  T7   4/15/09   107   $2,675,000  
  W7   4/16/09   107   $2,675,000  
  TH7   4/13/09   107   $2,675,000  
  F7   4/13/09   107   $2,675,000  
  W28   5/07/09   153   $3,825,000  
  TH28   4/24/09   153   $3,825,000  
BPP   T7   4/15/09   267   $6,675,000  
  W7   4/16/09   267   $6,675,000  
  R7   4/17/09   267   $6,675,000  
February 24, 2009          
    Redemption   Shares   Aggregate  
  Series   Date   Redeemed   Principle  
PSY   M7   3/17/09   160   $4,000,000  
  T7   3/18/09   160   $4,000,000  
PSY   M7   3/17/09   203   $5,075,000  
  T7   3/18/09   203   $5,075,000  
  W7   3/19/09   203   $5,075,000  
  TH7   3/13/09   203   $5,075,000  
  F7   3/16/09   203   $5,075,000  
  W28   4/09/09   292   $7,300,000  
  TH28   3/27/09   292   $7,300,000  
November 25, 2008          
    Redemption   Shares   Aggregate  
  Series   Date   Redeemed   Principle  
PSY   M7   12/16/08   400   $10,000,000  
  T7   12/17/08   400   $10,000,000  
PSY   M7   12/16/08   229   $5,725,000  
  T7   12/17/08   229   $5,725,000  
  W7   12/18/08   229   $5,725,000  
  TH7   12/12/08   229   $5,725,000  
  F7   12/15/08   229   $5,725,000  
  W28   12/18/08   327   $8,175,000  
  TH28   1/02/09   327   $8,175,000  
BPP   T7   12/17/09   266   $6,650,000  
  W7   12/18/09   266   $6,650,000  
  R7   12/19/09   266   $6,650,000  

All of the Funds, except BGT, financed the Preferred Share redemptions
with cash received from reverse repurchase agreements. BGT financed the
Preferred Share redemption with cash received from a loan.

56 SEMI-ANNUAL REPORT

APRIL 30, 2010


Notes to Financial Statements (concluded)

8. Borrowings:

BGT entered into a senior committed secured, 364-day revolving line of
credit and a separate security agreement (the “SSB Agreement”) with State
Street Bank and Trust Company (“SSB”). The Fund has granted a security
interest in substantially all of its assets to SSB.

Advances are made by SSB to the Fund, at the Fund’s option of (a) the
higher of (i) 1.0% above the Fed Effective Rate and (ii) 1.0% above the
Overnight LIBOR or (b) 1.0% above 7-day, 30-day, 60-day or 90-day LIBOR.
In addition, the Fund pays a facility fee and a commitment fee based upon
SSB’s total commitment to the Fund. The fees associated with each of the
agreements are included in the Statements of Operations as borrowing
costs. Advances to the Fund as of April 30, 2010 are shown in the
Statements of Assets and Liabilities as loan payable. The SSB Agreement
was renewed for 364 days under substantially the same terms effective
March 4, 2010. The commitment amount was increased from $134 million
to $145 million. For the six months ended April 30, 2010, the daily
weighted average interest rate was 1.49%.

BGT may not declare dividends or make other distributions on shares or
purchase any such shares if, at the time of the declaration, distribution or
purchase, asset coverage with respect to the outstanding short-term
borrowings is less than 300%.

For the six months ended April 30, 2010, the daily weighted average inter-
est rates for Funds with reverse repurchase agreements were as follows:

PSW   0.47%  
PSY   0.48%  
BTZ   0.48%  

9. Capital Loss CarryForwards:

As of October 31, 2009, the Funds had capital loss carryforwards available
to offset future realized capital gains through the indicated expiration dates:

Expires October 31,   PSW   PSY   BPP  
2011   $ 1,276,621      
2012   10,243,141   $ 62,733,648    
2013   5,058,900   17,911,331    
2014   8,481,628   12,145,117    
2015   6,724,694   19,582,978   $ 18,184,893  
2016   40,232,230   140,413,242   58,197,929  
2017   55,825,534   194,970,854   108,996,120  
Total   $127,842,748   $447,757,170   $185,378,942  
Expires October 31,     BTZ   BGT  
2015     $ 49,741,712   $ 3,268,804  
2016     113,355,213   24,616,531  
2017     223,939,227   45,385,443  
Total     $387,036,152   $ 73,270,778  

10. Subsequent Events:

Management’s evaluation of the impact of all subsequent events on the
Funds’ financial statements was completed through the date the financial
statements were issued and the following items were noted:

Each Fund paid a net investment income dividend on May 28, 2010 to
Common Shareholders of record on May 14, 2010 as follows:

  Common  
  Dividend  
  Per Share  
PSW   $0.0600  
PSY   $0.0750  
BPP   $0.0725  
BTZ   $0.1000  
BGT   $0.0675  

The dividends declared on Preferred Shares for the period May 1, 2010
to May 31, 2010 were as follows:

    Dividends  
  Series   Declared  
PSW   M7   $25,212  
  T7   $25,190  
PSY   M7   $26,966  
  T7   $26,942  
  W7   $26,940  
  TH7   $26,915  
  F7   $26,986  
  W28   $37,983  
  TH28   $38,122  
BPP   T7   $ 6,695  
  W7   $ 7,299  
  R7   $ 6,936  
BTZ   T7   $72,284  
  W7   $72,278  
  R7   $72,450  
  F7   $72,403  
BGT   T7   $24,585  
  W7   $24,582  
  R7   $24,561  

The Funds’ distribution rates declared on June 1, 2010 were as follows:

  Per Common  
  Share  
  Amount  
PSW   $0.0570  
PSY   $0.0635  
BPP   $0.0665  
BTZ   $0.0790  
BGT   $0.0700  

SEMI-ANNUAL REPORT

APRIL 30, 2010

57


Officers and Directors

Richard E. Cavanagh, Chairman of the Board and Director
Karen P. Robards, Vice Chair of the Board, Chair of the Audit Committee
and Director
Richard S. Davis, Director
Frank J. Fabozzi, Director and Member of the Audit Committee
Kathleen F. Feldstein, Director
James T. Flynn, Director and Member of the Audit Committee
Henry Gabbay, Director
Jerrold B. Harris, Director
R. Glenn Hubbard, Director
W. Carl Kester, Director and Member of the Audit Committee
Anne Ackerley, President and Chief Executive Officer
Brendan Kyne, Vice President
Neal Andrews, Chief Financial Officer
Jay Fife, Treasurer
Brian Kindelan, Chief Compliance Officer of the Funds
Howard Surloff, Secretary

Investment Advisor
BlackRock Advisors, LLC
Wilmington, DE 19809

Sub-Advisor
BlackRock Financial Management, Inc.
New York, NY 10022

Custodians
State Street Bank and Trust Company
Boston, MA 02111

Transfer Agent

Common Shares
Computershare Trust Company, N.A.
Canton, MA 02021

Auction Agent
Preferred Shares
BNY Mellon Shareowner Services
Jersey City, NJ 07310

Accounting Agent
State Street Bank and Trust Company
Princeton, NJ 08540

Independent Registered Public Accounting Firm
Deloitte & Touche LLP
Princeton, NJ 08540

Legal Counsel
Skadden, Arps, Slate, Meagher & Flom LLP
New York, NY 10036

Address of the Funds
100 Bellevue Parkway
Wilmington, DE 19809

Effective January 1, 2010, Kent Dixon, a Director of the Funds, retired.

Effective March 31, 2010, G. Nicholas Beckwith, III, a Director of the Funds, resigned.

The Funds’ Board of Directors extends its best wishes to both Mr. Dixon and Mr. Beckwith.

58 SEMI-ANNUAL REPORT

APRIL 30, 2010


Additional Information

Dividend Policy

Each Fund’s dividend policy is to distribute all or a portion of its net invest-
ment income to its shareholders on a monthly basis. In order to provide
shareholders with a more stable level of dividend distributions, the Funds
may at times pay out less than the entire amount of net investment income
earned in any particular month and may at times in any particular month
pay out such accumulated but undistributed income in addition to net

investment income earned in that month. As a result, the dividends paid by
the Funds for any particular month may be more or less than the amount
of net investment income earned by the Funds during such month. The
Funds’ current accumulated but undistributed net investment income, if
any, is disclosed in the Statements of Assets and Liabilities, which com-
prises part of the financial information included in this report.

General Information

The Funds do not make available copies of their Statements of Additional
Information because the Funds’ shares are not continuously offered, which
means that the Statement of Additional Information of each Fund has not
been updated after completion of the respective Fund’s offerings and the
information contained in each Fund’s Statement of Additional Information
may have become outdated.

Risks

As a result of each Fund’s portfolio restructuring and revisions to certain of
its non-fundamental investment policies, your investment in a Fund will be
subject to the following additional risks following the transition:

Credit Risk — Credit risk is the risk that one or more debt securities in a
Fund’s portfolio will decline in price or fail to pay interest or principal when
due because the issuer of the security experiences a decline in its financial
status. If the recent adverse conditions in the credit markets adversely
affect the broader economy, the credit quality of issuers of credit securities
in which a Fund may invest would be more likely to decline, all other things
being equal. While a senior position in the capital structure of a borrower
may provide some protection with respect to a Fund’s investments in senior
secured floating rate and fixed rate loans or debt, losses may still occur. To
the extent a Fund invests in below investment grade securities, it will be
exposed to a greater amount of credit risk than a Fund which invests in
investment grade securities. The prices of lower grade securities are more
sensitive to negative developments, such as a decline in the issuer’s rev-
enues or a general economic downturn, than are the prices of higher grade
securities. Securities of below investment grade quality are predominantly
speculative with respect to the issuer’s capacity to pay interest and repay
principal when due and therefore involve a greater risk of default. In addi-
tion, each Fund’s use of credit derivatives will expose it to additional risk in
the event that the bonds underlying the derivatives default.

Interest Rate Risk — The value of certain debt securities in each Fund’s
portfolio could be affected by interest rate fluctuations. When interest rates
decline, the value of fixed rate securities can be expected to rise. Con-
versely, when interest rates rise, the value of fixed rate securities can be
expected to decline. Recent adverse conditions in the credit markets may
cause interest rates to rise. Although changes in prevailing interest rates
can be expected to cause some fluctuations in the value of floating rate
securities (due to the fact that rates only reset periodically), the values of

these securities are substantially less sensitive to changes in market inter-
est rates than fixed rate instruments. Fluctuations in the value of a Fund’s
securities will not affect interest income on existing securities, but will be
reflected in the Fund’s net asset value. Each Fund may utilize certain
strategies, including taking positions in futures or interest rate swaps, for
the purpose of reducing the interest rate sensitivity of the portfolio and
decreasing the Fund’s exposure to interest rate risk, although there is no
assurance that it will do so or that such strategies will be successful.

Prepayment Risk — During periods of declining interest rates, borrowers
may exercise their option to prepay principal earlier than scheduled. For
fixed rate securities, such payments often occur during periods of declin-
ing interest rates, forcing a Fund to reinvest in lower yielding securities,
resulting in a possible decline in the Fund’s income and distributions to
shareholders. This is known as prepayment or “call” risk. Below investment
grade securities frequently have call features that allow the issuer to redeem
the security at dates prior to its stated maturity at a specified price (typi-
cally greater than par) only if certain prescribed conditions are met (“call
protection”). An issuer may redeem a below investment grade security if,
for example, the issuer can refinance the debt at a lower cost due to declin-
ing interest rates or an improvement in the credit standing of the issuer.
Certain of each Fund’s investments will not have call protection. For pre-
mium bonds (bonds acquired at prices that exceed their par or principal
value) purchased by a Fund, prepayment risk may be enhanced.

Below Investment Grade Risk — Each Fund may invest a substantial portion
of its assets in fixed income securities that are rated below investment
grade, which are commonly referred to as “junk bonds” and are regarded
as predominately speculative with respect to the issuer’s capacity to pay
interest and repay principal.

Lower grade securities may be particularly susceptible to economic down-
turns. It is likely that a prolonging of the current economic recession or a
future economic recession could disrupt severely the market for such secu-
rities and may have an adverse impact on the value of such securities. In
addition, it is likely that any such continuing or future economic downturn
could adversely affect the ability of the issuers of such securities to repay
principal and pay interest thereon and increase the incidence of default for
such securities.

SEMI-ANNUAL REPORT

APRIL 30, 2010

59


Additional Information (continued)

General Information (continued)

Lower grade securities, though high yielding, are characterized by high risk.
They may be subject to certain risks with respect to the issuing entity and
to greater market fluctuations than certain lower yielding, higher rated
securities. The retail secondary market for lower grade securities may be
less liquid than that for higher rated securities. Adverse conditions could
make it difficult at times for a Fund to sell certain securities or could result
in lower prices than those used in calculating the Fund’s net asset value.
Because of the substantial risks associated with investments in lower grade
securities, you could lose money on your investment in common shares of
a Fund, both in the short-term and the long-term.

Bank Loan Risk — As in the case of junk bonds, bank loans may be rated
in lower grade rating categories, or may be unrated but of lower grade qual-
ity. As in the case of junk bonds, bank loans can provide higher yields than
higher grade income securities, but are subject to greater credit and other
risks. Although bank loan obligations often are secured by pledges of
assets by the borrower and have other structural aspects intended to pro-
vide greater protection to the holders of bank loans than the holders of
unsecured and subordinated securities, there are also additional risks in
holding bank loans. In particular, the secondary trading market for bank
loans is not well developed, and therefore, bank loans present increased
market risk relating to liquidity and pricing concerns. In addition, there is
no assurance that the liquidation of the collateral would satisfy the claims
of the borrower’s obligations in the event of the nonpayment of scheduled
interest or principal, or that the collateral could be readily liquidated. As
a result, a Fund might not receive payments to which it is entitled and
thereby may experience a decline in the value of its investment and its
net asset value.

Convertible Bonds Risk — Although to a lesser extent than with fixed-income
securities, the market value of convertible bonds tends to decline as inter-
est rates increase and, conversely, tends to increase as interest rates
decline. In addition, because of the conversion feature, the market value
of convertible bonds tends to vary with fluctuations in the market value of
the underlying common stock. A unique feature of convertible bonds is that
as the market price of the underlying common stock declines, convertible
bonds tend to trade increasingly on a yield basis, and so may not experi-
ence market value declines to the same extent as the underlying common
stock. When the market price of the underlying common stock increases,
the prices of the convertible bonds tend to rise as a reflection of the value
of the underlying common stock. While no securities investments are with-
out risk, investments in convertible bonds generally entail less risk than
investments in common stock of the same issuer.

Quarterly performance, semi-annual and annual reports and other informa-
tion regarding the Funds may be found on BlackRock’s website, which can
be accessed at http://www.blackrock.com. This reference to BlackRock’s
website is intended to allow investors public access to information regard-
ing the Funds and does not, and is not intended to, incorporate BlackRock’s
website into this report.

Electronic Delivery

Electronic copies of most financial reports are available on the Funds’ web-
sites or shareholders can sign up for e-mail notifications of quarterly state-
ments, annual and semi-annual reports by enrolling in the Funds’ electronic
delivery program.

Shareholders Who Hold Accounts with Investment Advisors, Banks
or Brokerages:

Please contact your financial advisor to enroll. Please note that not all
investment advisors, banks or brokerages may offer this service.

Householding

The Funds will mail only one copy of shareholder documents, including
annual and semi-annual reports and proxy statements, to shareholders
with multiple accounts at the same address. This practice is commonly
called “householding” and it is intended to reduce expenses and eliminate
duplicate mailings of shareholder documents. Mailings of your shareholder
documents may be householded indefinitely unless you instruct us other-
wise. If you do not want the mailing of these documents to be combined
with those for other members of your household, please contact the Funds
at (800) 441-7762.

Availability of Quarterly Portfolio Schedule of Investments

Each Fund files its complete schedule of portfolio holdings with the
Securities and Exchange Commission (“SEC”) for the first and third quar-
ters of each fiscal year on Form N-Q. Each Fund’s Forms N-Q are available
on the SEC’s website at http://www.sec.gov and may also be reviewed and
copied at the SEC’s Public Reference Room in Washington, DC. Information
on the operation of the Public Reference Room may be obtained by calling
(800) SEC-0330. Each Fund’s Forms N-Q may also be obtained upon
request and without charge by calling (800) 441-7762.

Availability of Proxy Voting Policies and Procedures

A description of the policies and procedures that the Funds use to deter-
mine how to vote proxies relating to portfolio securities is available (1) with-
out charge, upon request, by calling toll-free (800) 441-7762; (2) at
www.blackrock.com; and (3) on the SEC’s website at http://www.sec.gov.

Availability of Proxy Voting Record

Information about how each Fund voted proxies relating to securities
held in each Fund’s portfolio during the most recent 12-month period
ended June 30 is available upon request and without charge (1) at
www.blackrock.com or by calling (800) 441-7762 and (2) on the
SEC’s website at http://www.sec.gov.

60 SEMI-ANNUAL REPORT

APRIL 30, 2010


Additional Information (continued)

Section 19(a) Notices

These reported amounts and sources of distributions are estimates and are not being provided for tax reporting purposes. The actual amounts and sources
for tax reporting purposes will depend upon each Fund’s investment experience during the year and may be subject to changes based on the tax regula-
tions. Each Fund will provide a Form 1099-DIV each calendar year that will explain the character of these dividends and distributions for federal income
tax purposes.

October 31, 2009                  
    Total Cumulative Distributions     % Breakdown of the Total Cumulative  
              for the Fiscal Year       Distributions for the Fiscal Year    
  Net   Net Realized     Total Per   Net   Net Realized     Total Per  
  Investment   Capital   Return of   Common   Investment   Capital   Return of   Common  
  Income   Gains   Capital   Share   Income   Gains   Capital   Share  
PSW   $0.248092     $0.111908   $0.360000   69%   0%   31%   100%  
PSY   $0.313490     $0.136510   $0.450000   70%   0%   30%   100%  
BPP   $0.332369     $0.102631   $0.435000   76%   0%   24%   100%  
BTZ.   $0.327812     $0.272188   $0.600000   55%   0%   45%   100%  
BGT   $0.405000       $0.405000   100%   0%   0%   100%  

Each Fund estimates that it has distributed more than the amount of earned income and net realized gains; therefore, a portion of the distribution may be
a return of capital. A return of capital may occur, for example, when some or all of the shareholder’s investment in a Fund is returned to the shareholder.
A return of capital does not necessarily reflect a Fund’s investment performance and should not be confused with ‘yield’ or ‘income.

SEMI-ANNUAL REPORT

APRIL 30, 2010

61


Additional Information (concluded)

BlackRock Privacy Principles

BlackRock is committed to maintaining the privacy of its current and former
fund investors and individual clients (collectively, “Clients”) and to safe-
guarding their non-public personal information. The following information is
provided to help you understand what personal information BlackRock col-
lects, how we protect that information and why in certain cases we share
such information with select parties.

If you are located in a jurisdiction where specific laws, rules or regulations
require BlackRock to provide you with additional or different privacy-related
rights beyond what is set forth below, then BlackRock will comply with those
specific laws, rules or regulations.

BlackRock obtains or verifies personal non-public information from and
about you from different sources, including the following: (i) information we
receive from you or, if applicable, your financial intermediary, on applica-
tions, forms or other documents; (ii) information about your transactions
with us, our affiliates, or others; (iii) information we receive from a consumer
reporting agency; and (iv) from visits to our websites.

BlackRock does not sell or disclose to non-affiliated third parties any non-
public personal information about its Clients, except as permitted by law
or as is necessary to respond to regulatory requests or to service Client
accounts. These non-affiliated third parties are required to protect the
confidentiality and security of this information and to use it only for its
intended purpose.

We may share information with our affiliates to service your account or to
provide you with information about other BlackRock products or services
that may be of interest to you. In addition, BlackRock restricts access
to non-public personal information about its Clients to those BlackRock
employees with a legitimate business need for the information. BlackRock
maintains physical, electronic and procedural safeguards that are designed
to protect the non-public personal information of its Clients, including pro-
cedures relating to the proper storage and disposal of such information.

62 SEMI-ANNUAL REPORT

APRIL 30, 2010



This report is transmitted to shareholders only. It is not a prospectus. Past performance results shown in this report should not be considered a representation
of future performance. The Funds leverage their Common Shares, which creates risk for Common Shareholders, including the likelihood of greater volatility of
net asset value and market price of Common Shares, and the risk that fluctuations in short-term interest rates may reduce the Common Shares’ yield.
Statements and other information herein are as dated and are subject to change.



Item 2 – Code of Ethics – Not Applicable to this semi-annual report

Item 3 – Audit Committee Financial Expert – Not Applicable to this semi-annual report

Item 4 – Principal Accountant Fees and Services – Not Applicable to this semi-annual report

Item 5 – Audit Committee of Listed Registrants – Not Applicable to this semi-annual report

Item 6 – Investments
(a) The registrant’s Schedule of Investments is included as part of the Report to
Stockholders filed under Item 1 of this form.
(b) Not Applicable due to no such divestments during the semi-annual period covered since
the previous Form N-CSR filing.

Item 7 – Disclosure of Proxy Voting Policies and Procedures for Closed-End Management
Investment Companies – Not Applicable to this semi-annual report

Item 8 – Portfolio Managers of Closed-End Management Investment Companies – Not Applicable to
this semi-annual report

Item 9 – Purchases of Equity Securities by Closed-End Management Investment Company and
Affiliated Purchasers – Not Applicable

Item 10 – Submission of Matters to a Vote of Security Holders – The registrant’s Nominating and
Governance Committee will consider nominees to the board of directors recommended by
shareholders when a vacancy becomes available. Shareholders who wish to recommend a
nominee should send nominations that include biographical information and set forth the
qualifications of the proposed nominee to the registrant’s Secretary. There have been no
material changes to these procedures.

Item 11 – Controls and Procedures

11(a) – The registrant’s principal executive and principal financial officers or persons performing
similar functions have concluded that the registrant’s disclosure controls and procedures (as
defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the
“1940 Act”)) are effective as of a date within 90 days of the filing of this report based on the
evaluation of these controls and procedures required by Rule 30a-3(b) under the 1940 Act
and Rule 13(a)-15(b) under the Securities Exchange Act of 1934, as amended.

11(b) – There were no changes in the registrant’s internal control over financial reporting (as
defined in Rule 30a-3(d) under the 1940 Act) that occurred during the second fiscal quarter
of the period covered by this report that have materially affected, or are reasonably likely to
materially affect, the registrant’s internal control over financial reporting.

Item 12 – Exhibits attached hereto

12(a)(1) – Code of Ethics – Not Applicable to this semi-annual report

12(a)(2) – Certifications – Attached hereto

12(a)(3) – Not Applicable

12(b) – Certifications – Attached hereto


12(c) – Notices to the registrant’s common shareholders in accordance with 1940 Act Section 19(a)
and Rule 19a-1 1

1 The Fund has received exemptive relief from the Securities and Exchange Commission permitting it
to make periodic distributions of long-term capital gains with respect to its outstanding common
stock as frequently as twelve times each year, and as frequently as distributions are specified by or in
accordance with the terms of its outstanding preferred stock. This relief is conditioned, in part, on an
undertaking by the Fund to make the disclosures to the holders of the Fund’s common shares, in
addition to the information required by Section 19(a) of the 1940 Act and Rule 19a-1 thereunder. The
Fund is likewise obligated to file with the SEC the information contained in any such notice to
shareholders and, in that regard, has attached hereto copies of each such notice made during the
period.


Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment
Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by
the undersigned, thereunto duly authorized.

BlackRock Credit Allocation Income Trust IV

By: /s/ Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer of
BlackRock Credit Allocation Income Trust IV

Date: June 28, 2010

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment
Company Act of 1940, this report has been signed below by the following persons on behalf
of the registrant and in the capacities and on the dates indicated.

By: /s/ Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer (principal executive officer) of
BlackRock Credit Allocation Income Trust IV

Date: June 28, 2010

By: /s/ Neal J. Andrews
Neal J. Andrews
Chief Financial Officer (principal financial officer) of
BlackRock Credit Allocation Income Trust IV

Date: June 28, 2010


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