BTZ BlackRock Credit Allocation Income Trust

UNITEDSTATES
SECURITIESANDEXCHANGECOMMISSION
Washington,D.C.20549

FORM N-CSR

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: 10/31/2010

Item 1 – Report to Stockholders

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Annual Report

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)

October 31, 2010

Not FDIC Insured • No Bank Guarantee • May Lose Value

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2 ANNUAL REPORT

OCTOBER 31, 2010

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Dear Shareholder

The global economic recovery that began in 2009 has continued on its choppy course this year, delivering mixed but slowly improving economic data and

gradual if uneven improvement of investor sentiment. The risks of a double-dip recession continue to recede, but the economy remains mired in a slow-

growth environment. In the United States, the National Bureau of Economic Research declared that the “Great Recession” ended in June 2009. Spanning

December 2007 to June 2009, this marked the longest reported recession since the Great Depression. Structural problems of ongoing deleveraging and

weak spending among businesses and households weigh heavily on the pace of economic growth. The unemployment rate remains stubbornly high in the

face of sluggish job gains in the private sector. The US dollar, along with other developed market currencies, has experienced devaluation resulting from

aggressively easy monetary and fiscal policies. Given these long-standing conditions, the Federal Reserve Board has announced that additional policy

action will be taken to combat deflation and unemployment and promote economic growth.

The high levels of volatility experienced in global equity markets throughout 2009 continued into 2010 as mixed economic data and lingering credit issues

caused stocks to trade in both directions, but by the end of the first quarter, most markets had managed to post gains. The second quarter, in contrast,

brought higher levels of volatility and a “flight to quality” as investor sentiment was dominated by fears of a double-dip recession. Global equity markets saw

negative quarterly returns — and for many markets, the first significant downturn since the bull market began in March 2009. In the third quarter, economic

data turned less negative and strong corporate earnings reports became increasingly consistent. These factors, along with attractive valuations and expec-

tations for additional quantitative easing, drove equity markets higher, with most markets recapturing their second quarter losses. Stocks continued their

rally into the beginning of the fourth quarter, closing out the 12-month period in positive territory. International equities posted gains on both a six- and

12-month basis. In the United States, both large and small cap equities posted robust gains for the 12-month period, while on a six-month basis, large

cap stocks remained relatively flat and small caps turned slightly negative.

In fixed income markets, yields fluctuated but declined significantly over the past 12 months amid heightened uncertainty. Weak economic data, lingering

credit problems and, near the end of the period, the expectation of additional quantitative easing drove interest rates lower and bond prices higher.

Treasuries rallied over the period, modestly outperforming the credit spread sectors of the market. Corporate credit spreads benefited from the low interest

rate environment and high yield fixed income became increasingly attractive due to declining default rates and better-than-expected results on European

bank stress tests. Tax-exempt municipal bonds performed well over the 12-month period, driven primarily by technical factors including favorable supply-

and-demand dynamics.

Cash investments, as represented by the 3-month Treasury bill, returned only a fraction over 0% for the 12-month period as short-term interest rates

remained low. Yields on money market securities remain near all-time lows.

 

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

As global economic conditions continue to improve, investors across the world continue to face uncertainty about the future of economic growth. 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

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Fund Summary as of October 31, 2010

BlackRock Credit Allocation Income Trust I, Inc.

Fund Overview

BlackRock Credit Allocation Income Trust I, Inc.’s (PSW) (the “Fund”) investment objective is to provide Common Shareholders with high current income. The
Fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its assets in credit-related securities, including,
but not limited to, investment grade corporate bonds, high yield bonds (commonly referred to as “junk” bonds), bank loans, preferred securities or convertible
bonds or derivatives with economic characteristics similar to these credit-related securities. The Fund may invest directly in such securities or synthetically
through the use of derivatives.

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 12 months ended October 31, 2010, the Fund returned 26.81% based on market price and 24.77% based on NAV. For the same period, the Lipper
closed-end Corporate Debt Funds (BBB-Rated) category posted an average return of 21.98% based on market price and 16.32% based on NAV. 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. The following discussion relates to performance based on NAV. The Fund benefited from its asset allocation within
preferred securities, which experienced a rebound during the period. In particular, allocations to institutional corporate securities and hybrid securities had a
positive impact as those sectors significantly outperformed $25-par preferred securities, in which the Fund was underweight. The Fund’s participation in pre-
ferred equity exchange tender offers from several of its holdings added to performance, and an overweight in the insurance sector proved beneficial. The
Fund reduced its market risk prior to May when the European sovereign debt crisis triggered a dip in risk asset prices. This defensive move contributed posi-
tively to relative performance. Conversely, the Fund’s bias toward investment-grade securities detracted from performance near the end of the period when
lower quality sectors rebounded on heightened expectations for a second round of quantitative easing from the Federal Reserve Board. The Fund frequently
held cash committed for pending transactions; the cash balance did not have a material impact on performance.

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.

 

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 A change in the distribution rate was declared on December 6, 2010. The Monthly Distribution per Common Share was decreased to $0.0495. The Yield on Closing Market Price,
Current Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The new distribution rate is not
constant and is subject to further change in the future.
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:

 

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

 

 

⁴ Using the higher of Standard & Poor’s (“S&P’s”) or Moody’s Investors Service
(“Moody’s”) ratings.
⁵ Includes US Treasury obligations that are deemed AAA by the Investment Advisor.

4 ANNUAL REPORT

OCTOBER 31, 2010

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Fund Summary as of October 31, 2010

BlackRock Credit Allocation Income Trust II, Inc.

Fund Overview

BlackRock Credit Allocation Income Trust II, Inc.’s (PSY) (the “Fund”) primary investment objective is to provide Common Shareholders with current income.
The Fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its assets in credit-related securities, includ-
ing, but not limited to, investment grade corporate bonds, high yield bonds (commonly referred to as “junk” bonds), bank loans, preferred securities or convert-
ible bonds or derivatives with economic characteristics similar to these credit-related securities. The Fund may invest directly in such securities or synthetically
through the use of derivatives.

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 12 months ended October 31, 2010, the Fund returned 26.99% based on market price and 25.70% based on NAV. For the same period, the Lipper
closed-end Corporate Debt Funds (BBB-Rated) category posted an average return of 21.98% based on market price and 16.32% based on NAV. 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. The following discussion relates to performance based on NAV. The Fund benefited from its asset allocation within
preferred securities, which experienced a rebound during the period. In particular, allocations to institutional corporate securities and hybrid securities had a
positive impact as those sectors significantly outperformed $25-par preferred securities, in which the Fund was underweight. The Fund’s participation in pre-
ferred equity exchange tender offers from several of its holdings added to performance, and an overweight in the insurance sector proved beneficial. The
Fund reduced its market risk prior to May when the European sovereign debt crisis triggered a dip in risk asset prices. This defensive move contributed posi-
tively to relative performance. Conversely, the Fund’s bias toward investment-grade securities detracted from performance near the end of the period when
lower quality sectors rebounded on heightened expectations for a second round of quantitative easing from the Federal Reserve Board. The Fund frequently
held cash committed for pending transactions; the cash balance did not have a material impact on performance.

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.

 

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 A change in the distribution rate was declared on December 6, 2010. The Monthly Distribution per Common Share was decreased to $0.0535. The Yield on Closing Market Price,
Current Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The new distribution rate is not
constant and is subject to further change in the future.
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:

 

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

 

 

⁴ Using the higher of S&P’s or Moody’s ratings.
⁵ Includes US Treasury obligations that are deemed AAA by the Investment Advisor.

ANNUAL REPORT

OCTOBER 31, 2010

5

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Fund Summary as of October 31, 2010

BlackRock Credit Allocation Income Trust III

Fund Overview

BlackRock Credit Allocation Income Trust III’s (BPP) (the “Fund”) investment objective is to provide high current income consistent with capital preserva-
tion. The Fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its assets in credit-related securities,
including, but not limited to, investment grade corporate bonds, high yield bonds (commonly referred to as “junk” bonds), bank loans, preferred securities or
convertible bonds or derivatives with economic characteristics similar to these credit-related securities. The Fund may invest directly in such securities or
synthetically through the use of derivatives.

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 12 months ended October 31, 2010, the Fund returned 22.25% based on market price and 21.52% based on NAV. For the same period, the Lipper
closed-end Corporate Debt Funds (BBB-Rated) category posted an average return of 21.98% based on market price and 16.32% based on NAV. 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. The following discussion relates to performance based on NAV. The Fund benefited from its asset allocation within
preferred securities, which experienced a rebound during the period. In particular, allocations to institutional corporate securities and hybrid securities had a
positive impact as those sectors significantly outperformed $25-par preferred securities, in which the Fund was underweight. The Fund’s participation in pre-
ferred equity exchange tender offers from several of its holdings added to performance, and an overweight in the insurance sector proved beneficial. The
Fund reduced its market risk prior to May when the European sovereign debt crisis triggered a dip in risk asset prices. This defensive move contributed posi-
tively to relative performance. Conversely, the Fund’s bias toward investment-grade securities detracted from performance near the end of the period when
lower quality sectors rebounded on heightened expectations for a second round of quantitative easing from the Federal Reserve Board. The Fund frequently
held cash committed for pending transactions; the cash balance did not have a material impact on performance.
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.

 

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 A change in the distribution rate was declared on December 6, 2010. The Monthly Distribution per Common Share was decreased to $0.054. The Yield on Closing Market Price,
Current Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The new distribution rate is not
constant and is subject to further change in the future.
³ Represents 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:

 

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

 

 

⁴ Using the higher of S&P’s or Moody’s ratings.
⁵ Includes US Treasury obligations that are deemed AAA by the Investment Advisor.

6 ANNUAL REPORT

OCTOBER 31, 2010

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Fund Summary as of October 31, 2010

BlackRock Credit Allocation Income Trust IV

Fund Overview

BlackRock Credit Allocation Income Trust IV’s (BTZ) (the “Fund”) investment objective is to provide current income, current gains and capital apprecia-
tion. The Fund seeks to achieve its investment objective by investing, under normal market conditions, at least 80% of its assets in credit-related securi-
ties, including, but not limited to, investment grade corporate bonds, high yield bonds (commonly referred to as “junk” bonds), bank loans, preferred
securities or convertible bonds or derivatives with economic characteristics similar to these credit-related securities. The Fund may invest directly in such
securities or synthetically through the use of derivatives.

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 12 months ended October 31, 2010, the Fund returned 29.98% based on market price and 25.16% based on NAV. For the same period, the Lipper
closed-end Corporate Debt Funds (BBB-Rated) category posted an average return of 21.98% based on market price and 16.32% based on NAV. 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. The following discussion relates to performance based on NAV. The Fund benefited from its asset allocation within
preferred securities, which experienced a rebound during the period. In particular, allocations to institutional corporate securities and hybrid securities had a
positive impact as those sectors significantly outperformed $25-par preferred securities, in which the Fund was underweight. The Fund’s participation in pre-
ferred equity exchange tender offers from several of its holdings added to performance, and an overweight in the insurance sector proved beneficial. The
Fund reduced its market risk prior to May when the European sovereign debt crisis triggered a dip in risk asset prices. This defensive move contributed posi-
tively to relative performance. Conversely, the Fund’s bias toward investment-grade securities detracted from performance near the end of the period when
lower quality sectors rebounded on heightened expectations for a second round of quantitative easing from the Federal Reserve Board. The Fund frequently
held cash committed for pending transactions; the cash balance did not have a material impact on performance.

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.

 

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 A change in the distribution rate was declared on December 6, 2010. The Monthly Distribution per Common Share was decreased to $0.069. The Yield on Closing Market Price,
Current Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The new distribution rate is not
constant and is subject to further change in the future.
³ Represents 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:

 

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:

 

 

ANNUAL REPORT

OCTOBER 31, 2010

7

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Fund Summary as of October 31, 2010

BlackRock Floating Rate Income Trust

Fund Overview

BlackRock Floating Rate Income Trust’s (BGT) (the “Fund”) primary investment objective is to provide a high level of current income. The Fund’s secondary
investment objective is to seek the preservation of capital. The Fund seeks to achieve its investment objectives by investing primarily, under normal condi-
tions, at least 80% of its assets in floating and variable rate instruments of US and non-US issuers, including a substantial portion of its assets in global
floating and variable rate securities including senior secured floating rate loans made to corporate and other business entities. Under normal market condi-
tions, the Fund expects that the average effective duration of its portfolio will be no more than 1.5 years. The Fund may invest directly in such securities or
synthetically through the use of derivatives.

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

Performance

For the 12 months ended October 31, 2010, the Fund returned 22.41% based on market price and 15.55% based on net asset value (“NAV”). For the same
period, the closed-end Lipper Loan Participation Funds category posted an average return of 28.36% based on market price and 13.42% based on NAV. All
returns reflect reinvestment of dividends. The Fund moved from a discount to NAV to a premium by period end, which accounts for the difference between per-
formance based on price and performance based on NAV. The following discussion relates to performance based on NAV. The Fund’s exposure to high yield
and emerging markets contributed positively to performance as these sectors performed well during the period. Given the advisor’s outlook for a continued slow
economic environment, the Fund focused on higher quality loan structures, borrowers and sectors, and favored companies with relatively stable cash flows and
the ability to generate steady income. Outside of this focus, the Fund invested in a few special situations and recovery stories, which boosted relative perform-
ance. Detracting modestly from performance was the Fund’s bias toward higher quality sectors and credits, which generally underperformed lower quality sec-
tors and credits over the period. In addition, the Fund maintained its leverage below the Lipper category average, which detracted from relative performance, as
would be expected when markets are advancing.
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.

 

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 A change in the distribution rate was declared on December 6, 2010. The Monthly Distribution per Common Share was increased to $0.075. The Yield on Closing Market Price,
Current Monthly Distribution per Common Share and Current Annualized Distribution per Common Share do not reflect the new distribution rate. The new distribution rate is not
constant and is subject to further change in the future.
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 borrow-
ings 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:

 

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:

 

 

⁴ Using the higher of S&P’s or Moody’s ratings.
⁵ The investment advisor has deemed certain of these non-rated securities to be of
investment grade quality. As of October 31, 2010, the market value of these securi-
ties was $606,918 representing 1% of the Fund's long-term investments.

8 ANNUAL REPORT

OCTOBER 31, 2010

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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 by borrowing through a credit facility,
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 each Fund’s 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
Common Shareholders and may reduce income to 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 October 31, 2010, the Funds had economic leverage
from Preferred Shares, reverse repurchase agreements and/or credit facility
borrowings as a percentage of their total managed assets as follows:

 

ANNUAL REPORT

OCTOBER 31, 2010

9

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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
portfolio investments at inopportune times or at distressed values, may
limit the amount of appreciation the Funds can realize on an investment,
may result in lower dividends paid to shareholders or may cause the
Funds to hold an investment that they might otherwise sell. The Funds’
investments in these instruments are discussed in detail in the Notes to
Financial Statements.

10 ANNUAL REPORT

OCTOBER 31, 2010

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Schedule of Investments October 31, 2010

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

(Percentages shown are based on Net Assets)

 

 

 

ANNUAL REPORT

OCTOBER 31, 2010

11

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Schedule of Investments (continued)

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

(Percentages shown are based on Net Assets)

 

 

See Notes to Financial Statements.

12 ANNUAL REPORT

OCTOBER 31, 2010

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Schedule of Investments (continued)

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

(Percentages shown are based on Net Assets)

 

* The cost and unrealized appreciation (depreciation) of investments as of October 31,
2010, as computed for federal income tax purposes, were as follows:

 

(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) Security is perpetual in nature and has no stated maturity date.
(d) All or a portion of security has been pledged as collateral in connection with open
reverse repurchase agreements.
(e) Investments in companies considered to be an affiliate of the Fund during the
year, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as
amended, were as follows:

 

(f) 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.

ANNUAL REPORT

OCTOBER 31, 2010

13

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Schedule of Investments (concluded)

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

• Fair Value Measurements — Various inputs are used in determining the fair value of
investments and derivatives, 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
and derivatives)
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 October 31, 2010 in deter-
mining the fair valuation of the Fund’s investments and derivatives:

 

 

¹ Derivative financial instruments are financial futures contracts, 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:

 

² Included in the related net change in unrealized appreciation/depreciation
on the Statements of Operations. The net change in unrealized appreciation/
depreciation on securities still held at October 31, 2010 was $0.
³ The Fund’s policy is to recognize transfers in and transfers out as of the end of
the period of the event or the change in circumstances that caused the transfer.

See Notes to Financial Statements.

14 ANNUAL REPORT

OCTOBER 31, 2010

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Schedule of Investments October 31, 2010

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

(Percentages shown are based on Net Assets)

 

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

15

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Schedule of Investments (continued)

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

(Percentages shown are based on Net Assets)

 

 

See Notes to Financial Statements.

16 ANNUAL REPORT

OCTOBER 31, 2010

---

Schedule of Investments (continued)

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

(Percentages shown are based on Net Assets)

 

 

* The cost and unrealized appreciation (depreciation) of investments as of October 31,
2010, as computed for federal income tax purposes, were as follows:

 

(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) Security is perpetual in nature and has no stated maturity date.
(d) All or a portion of security has been pledged as collateral in connection with open
reverse repurchase agreements.
(e) Investments in companies considered to be an affiliate of the Fund during the
year, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as
amended, were as follows:

 

(f) 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.

ANNUAL REPORT

OCTOBER 31, 2010

17

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Schedule of Investments (concluded)

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

• Fair Value Measurements — Various inputs are used in determining the fair value of
investments and derivatives, 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 and
derivatives)
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 October 31, 2010 in deter-
mining the fair valuation of the Fund’s investments and derivatives:

 

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

 

² Included in the related net change in unrealized appreciation/depreciation on the Statements of Operations. The net change in unrealized appreciation/depreciation on
securities still held at October 31, 2010 was $27,409.
³ The Fund’s policy is to recognize transfers in and transfers out as of the end of the period of the event or the change in circumstances that caused the transfer.

See Notes to Financial Statements.

18 ANNUAL REPORT

OCTOBER 31, 2010

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Schedule of Investments October 31, 2010

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

 

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

19

---

Schedule of Investments (continued)

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

 

 

See Notes to Financial Statements.

20 ANNUAL REPORT

OCTOBER 31, 2010

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Schedule of Investments (continued)

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

 

 

(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) 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,
if any.
(g) Investments in companies considered to be an affiliate of the Fund during the
year, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as
amended, were as follows:

 

(h) 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.
• Financial futures contracts purchased as of October 31, 2010 were as follows:

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

21

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Schedule of Investments (concluded)

BlackRock Credit Allocation Income Trust III (BPP)

• Fair Value Measurements — Various inputs are used in determining the fair value of
investments and derivatives, 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
and derivatives)
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 October 31, 2010 in deter-
mining the fair valuation of the Fund’s investments and derivatives:

 

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

 

² Included in the related net change in unrealized appreciation/depreciation on the Statements of Operations. The net change in unrealized appreciation/depreciation on
securities still held at October 31, 2010 was $(684).
³ The Fund’s policy is to recognize transfers in and transfers out as of the end of the period of the event or the change in circumstances that caused the transfer.

See Notes to Financial Statements.

22 ANNUAL REPORT

OCTOBER 31, 2010

---

Schedule of Investments October 31, 2010

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

 

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

23

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Schedule of Investments (continued)

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

 

 

See Notes to Financial Statements.

24 ANNUAL REPORT

OCTOBER 31, 2010

---

Schedule of Investments (continued)

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

 

 

(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) 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) Non-income producing security.
(f) Investments in companies considered to be an affiliate of the Fund during the
year, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as
amended, were as follows:

 

(g) 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.
• Financial futures contracts purchased as of October 31, 2010 were as follows:

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

25

---

Schedule of Investments (concluded)

BlackRock Credit Allocation Income Trust IV (BTZ)

• Fair Value Measurements — Various inputs are used in determining the fair value of
investments and derivatives, 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
and derivatives)
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 October 31, 2010 in deter-
mining the fair valuation of the Fund’s investments and derivatives:

 

¹ Derivative financial instruments are financial futures contracts 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:

 

² Included in the related net change in unrealized appreciation/depreciation
on the Statements of Operations. The net change in unrealized appreciation/
depreciation on securities still held at October 31, 2010 was $40,384.
³ The Fund’s policy is to recognize transfers in and transfers out as of the end of
the period of the event or the change in circumstances that caused the transfer.

See Notes to Financial Statements.

26 ANNUAL REPORT

OCTOBER 31, 2010

---

Schedule of Investments October 31, 2010

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

 

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

27

---

Schedule of Investments (continued)

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

 

 

See Notes to Financial Statements.

28 ANNUAL REPORT

OCTOBER 31, 2010

---

Schedule of Investments (continued)

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

 

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

29

---

Schedule of Investments (continued)

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

 

 

See Notes to Financial Statements.

30 ANNUAL REPORT

OCTOBER 31, 2010

---

Schedule of Investments (continued)

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

 

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

31

---

Schedule of Investments (continued)

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

 

 

See Notes to Financial Statements.

32 ANNUAL REPORT

OCTOBER 31, 2010

---

Schedule of Investments (continued)

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

 

* The cost and unrealized appreciation (depreciation) of investments as of October 31,
2010, as computed for federal income tax purposes, were as follows:

 

(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) Non-income producing security.
(d) Convertible security.
(e) Represents a zero-coupon bond. Rate shown reflects the current yield as of
report date.
(f) Issuer filed for bankruptcy and/or is in default of interest payments.
(g) Represents a payment-in-kind security which may pay interest/dividends in
additional face/shares.
(h) Other interests represent beneficial interest in liquidation trusts and other reorgani-
zation entities and are non-income producing.
(i) Amount is less than $1,000.
(j) The investment is held by a wholly-owned taxable subsidiary of the Fund.
(k) 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,
if any.
(l) Investments in companies considered to be an affiliate of the Fund during the
year, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, as
amended, were as follows:

 

 

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 and
derivatives)
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 October 31, 2010 in deter-
mining the fair valuation of the Fund’s investments and derivatives:

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

33

---

Schedule of Investments (concluded)

BlackRock Floating Rate Income Trust (BGT)

 

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

 

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

 

² Included in the related net change in unrealized appreciation/depreciation on the Statements of Operations. The net change in unrealized appreciation/depreciation on securi-
ties still held at October 31, 2010 was $4,463,089.
³ The Fund's policy is to recognize transfers in and transfers out as of the end of the period of the event or the change in circumstances that caused the transfer.

 

⁴ Included in the related net change in unrealized appreciation/depreciation on
the Statements of Operations. The net change in unrealized appreciation/depre-
ciation on securities still held at October 31, 2010 was $407,866.
⁵ The Fund's policy is to recognize transfers in and transfers out as of the end of
the period of the event or the change in circumstances that caused the transfer.

See Notes to Financial Statements.

34 ANNUAL REPORT

OCTOBER 31, 2010

---

 

ANNUAL REPORT

OCTOBER 31, 2010

35

---

 

See Notes to Financial Statements.

36 ANNUAL REPORT

OCTOBER 31, 2010

---

 

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

37

---

 

See Notes to Financial Statements.

38 ANNUAL REPORT

OCTOBER 31, 2010

---

 

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

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

39

---

 

¹ Based on average shares outstanding.
² 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.
³ Includes proceeds from a settlement of litigation which impacted the Fund. Not including these proceeds the Fund’s total return would have been 24.54%.
⁴ Do not reflect the effect of dividends to Preferred Shareholders.

See Notes to Financial Statements.

40 ANNUAL REPORT

OCTOBER 31, 2010

---

 

¹ Based on average shares outstanding.
² Amount is less than $(0.01) per share.
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 Includes proceeds from a settlement of litigation which impacted the Fund. Not including these proceeds the Fund’s total return would have been 25.37%.
⁵ Do not reflect the effect of dividends to Preferred Shareholders.

See Notes to Financial Statements.

ANNUAL REPORT

OCTOBER 31, 2010

41

---

 

¹ Based on average shares outstanding.
² 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.
³ Aggregate total investment return.
⁴ Do not reflect the effect of dividends to Preferred Shareholders.
⁵ Annualized.

See Notes to Financial Statements.

42 ANNUAL REPORT

OCTOBER 31, 2010

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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 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.

ANNUAL REPORT

OCTOBER 31, 2010

43

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¹ Based on average shares outstanding.
² Amount is less than $(0.01) per share.
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.

44 ANNUAL REPORT

OCTOBER 31, 2010

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Notes to Financial Statements

1. Organization and Significant Accounting Policies:

BlackRock Credit Allocation Income Trust I, Inc. (“PSW”) and BlackRock
Credit Allocation Income Trust II, Inc. (“PSY”) are registered as diversified,
closed-end management investment companies under the Investment
Company Act of 1940, as amended (the “1940 Act”). BlackRock Credit
Allocation Income Trust III (“BPP”), BlackRock Credit Allocation Income Trust
IV (“BTZ”) and BlackRock Floating Rate Income Trust (“BGT”) are registered
as non-diversified, closed-end management investment 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 management to make estimates and
assumptions that affect the reported amounts and disclosures in the finan-
cial statements. Actual results could 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 fair value their financial instruments at market value
using independent dealers or pricing services under policies approved by
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 invest-
ments, quotations from dealers, pricing matrixes, market transactions in
comparable investments, various relationships observed in the market
between investments and calculated yield measures based on valuation
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 valued at amortized cost,
which approximates fair value.

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.

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.

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 valued 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 incorporates 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 in accordance with a policy approved by the 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 each Fund might reasonably expect to receive from the cur-
rent sale of that asset in an arm’s-length transaction. Fair value determina-
tions 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 Funds’ net assets.
If events (for example, a company announcement, market volatility or a
natural 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 investment advisor using a pricing service and/or policies approved
by the Board.

Foreign Currency Transactions: The Funds’ books and records are main-
tained in US dollars. Purchases and sales of investment securities are
recorded at the rates of exchange prevailing on the date the transactions
are entered into. Generally, when the US dollar rises in value against a for-
eign 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.

ANNUAL REPORT

OCTOBER 31, 2010

45

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Notes to Financial Statements (continued)

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.

Zero-Coupon Bonds: The Funds may invest in zero-coupon bonds, which
are normally issued at a significant discount from face value and do not
provide 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.

Capital Trusts: 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: The Funds may invest in preferred stocks. Preferred stock
has a preference over common stock in liquidation (and generally in receiv-
ing 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 convertible pre-
ferred stock generally also reflects some element of conversion value.
Because preferred stock is junior to debt securities and other obligations
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 pay-
ments 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 Loan Interests: The Funds may invest in floating rate loan
interests. The floating rate loan interests the Funds hold are typically 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 borrower.
Floating rate loan interests generally pay interest at rates that are periodi-
cally determined by reference to a base lending rate plus a premium. The
base lending rates are generally the lending rate offered by one or more
European banks, such as LIBOR (London Inter Bank 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 invest-
ments may be denominated in foreign currencies. The Funds consider
these investments to be investments in debt securities for purposes of
their investment policies.

When a Fund buys 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 borrower’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 con-
tractual 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 they are 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
they have 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. Each Fund’s investment 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 repur-
chase agreements with qualified third party broker-dealers. In a reverse
repurchase agreement, the Funds sell securities to a bank or broker-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 transac-
tion is greater than the interest expense of the transaction. Reverse repur-
chase 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

46 ANNUAL REPORT

OCTOBER 31, 2010

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Notes to Financial Statements (continued)

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.

Defensive Positions: PSW, PSY, BPP and BTZ may vary their investment poli-
cies for temporary defensive purposes during periods in which the invest-
ment 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.

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 secu-
rities 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
and accretion of premiums and discounts 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 exceed 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. Dividends and distributions to Preferred Shareholders are
accrued and determined as described in Note 7.

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 and to distribute substantially all of its taxable
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 hold an investment that is organized as an operating partnership
while still satisfying Regulated Investment Company tax requirements.
Income earned on the investment held by the Taxable Subsidiary is
taxable to such subsidiary. 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 limita-
tions on PSW’s and PSY’s US federal tax returns remains open for the four
years ended October 31, 2010. The statute of limitations on BPP’s and
BGT’s US federal tax returns remains open for the year ended December
31, 2007, the period ended October 31, 2008 and the two years ended
October 31, 2010. The statute of limitations on BTZ’s US Federal tax
returns remains open for the three years ended October 31, 2010 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
depending upon the jurisdiction. There are no uncertain tax positions that
require recognition of a tax liability.

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 certain other 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 certain other
BlackRock Closed-End Funds.

The deferred compensation plan is not funded and obligations there-under
represent general unsecured claims against the general assets of each
Fund. Each Fund may, however, elect to invest in common shares of certain
other 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 Funds are charged to that 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.

ANNUAL REPORT

OCTOBER 31, 2010

47

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Notes to Financial Statements (continued)

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 engage in various portfolio investment strategies using derivative
contracts 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, foreign currency exchange rate risk or other risk
(inflation risk). These contracts may be transacted on an exchange or OTC.

Losses may arise if the value of the contract decreases due to an unfavor-
able change in the market rates or values of the underlying instrument or
if the counterparty does not perform under the contract. The Funds' maxi-
mum risk of loss from counterparty credit risk on OTC derivatives is gener-
ally the aggregate unrealized gain netted against any collateral pledged
by/posted to the counterparty. For OTC options purchased, the Funds bear
the risk of loss in the amount of the premiums paid plus the positive
change in market values net of any collateral received on the options
should the counterparty fail to perform under the contracts. Options written
by the Funds do not give rise to counterparty credit risk, as options written
obligate the Funds to perform and not the counterparty. Counterparty risk
related to exchange-traded financial futures contracts and options is
deemed to be minimal due to the protection against defaults provided
by the exchange on which these contracts trade.

The Funds may mitigate counterparty risk by procuring collateral and
through netting provisions included within an International Swaps and
Derivatives Association, Inc. (“ISDA”) Master Agreement implemented
between a Fund and each of its respective counterparties. The ISDA Master
Agreement allows each Fund to offset with each separate counterparty
certain derivative financial instrument’s payables and/or receivables with
collateral held. The amount of collateral moved to/from applicable count-
erparties is generally based upon minimum transfer amounts of up to
$500,000. To the extent amounts due to the Funds from their counter-
parties are not fully collateralized contractually or otherwise, the Funds
bear the risk of loss from counterparty non-performance. See Note 1
“Segregation and Collateralization” for information with respect to collateral
practices. In addition, the Funds manage counterparty risk by entering
into agreements only with counterparties that it believes have the financial
resources to honor their obligations and by monitoring the financial stability
of those counterparties.

Certain ISDA Master Agreements allow counterparties to OTC derivatives to
terminate derivative contracts prior to maturity in the event the Funds' net
assets decline by a stated percentage or the Funds fails to meet the terms
of its ISDA Master Agreements, which would cause the Funds to accelerate
payment of any net liability owed to the counterparty.

Financial Futures Contracts: The Funds 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 securities or currencies at
a specific future date and at a specific price or yield. Pursuant to the con-
tract, 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 transactions 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 enter into foreign cur-
rency exchange contracts as an economic hedge against either specific
transactions or portfolio instruments or to obtain exposure to foreign cur-
rencies (foreign currency exchange rate risk). A foreign currency exchange
contract 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 a Fund, help to manage the overall exposure to the currency
backing some of the investments held by the Fund. 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 the value of a for-
eign currency exchange contract changes unfavorably due to movements in
the value of the referenced foreign currencies and the risk that a counter-
party to the contract does not perform its obligations under the agreement.

Options: The Funds purchase and write call and put options to increase or
decrease their exposure to underlying instruments (including equity risk
and/or interest rate risk) and/or, in the case of options written, to generate
gains from options premiums. 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 exer-
cise 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 (write) an option,
an amount equal to the premium 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 pur-
chased (written). When an instrument 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 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
premiums 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 counterparty. When the Funds write a

48 ANNUAL REPORT

OCTOBER 31, 2010

---

Notes to Financial Statements (continued)

put option, such option is covered by cash in an amount sufficient to cover
the obligation.

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

Swaps: The Funds 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, which is recognized as realized gain or loss in the Statements of
Operations. 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 enter into credit default swaps to
manage their exposure to the market or certain sectors of the market,
to reduce their risk exposure to defaults of corporate and/or sovereign
issuers or to create exposure to corporate and/or sovereign issuers to
which they are 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 they are not otherwise exposed (as seller
of protection). The Funds may either buy or sell (write) credit default
swaps on single-name issuers (corporate or sovereign), a combination
or basket of single-name issuers or traded indexes. Credit default
swaps on single-name issuers are agreements in which the buyer pays
fixed periodic 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,
repudiation, moratorium or restructuring). Credit default swaps on
traded indexes are agreements in which the buyer pays fixed periodic
payments 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.

 

* Includes cumulative 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.

ANNUAL REPORT

OCTOBER 31, 2010

49

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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

50 ANNUAL REPORT

OCTOBER 31, 2010

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Notes to Financial Statements (continued)

and BGT) net assets (including any assets attributable to borrowings or
to the proceeds from the issuance of Preferred Shares) as follows:

 

Average daily net assets is the average daily value of each Fund’s total
assets minus the sum of its liabilities (other than borrowings representing
financial leverage). Average weekly net assets is the average weekly value
of each Fund’s total assets minus the sum of its liabilities (other than bor-
rowings representing financial leverage).

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 (including any assets attributable to borrowings or to the
proceeds from the issuance of Preferred Shares) minus the sum of liabili-
ties (other than borrowings representing financial leverage) as follows:
0.15% for the period September 1, 2009 to 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 year ended
October 31, 2010, the Manager waived $579,445, which is included in
fees waived by advisor in the Statements of Operations.

The Manager voluntarily agreed to waive its advisory fees by the amount
of investment advisory fees each Fund pays to the Manager indirectly
through its investment in affiliated money market funds, however the
Manager does not waive its investment advisory fees by the amount of
investment advisory fees paid through each Fund’s investment in other
affiliated investment companies, if any. These amounts are included in
fees waived by advisor in the Statements of Operations. For the year
ended October 31, 2010, the amounts waived were as follows:

 

The Manager entered into a 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 percent-
age of the investment advisory fees paid by each Fund to the Manager.

For the year ended October 31, 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:

 

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 and payups,
excluding short-term securities and US government securities for the year
ended October 31, 2010, were as follows:

 

Purchases and sales of US government securities for the year ended
October 31, 2010, were as follows:

 

Transactions in options written for the year ended October 31, 2010, were
as follows:

 

5. Commitments:

The Funds may invest in floating rate loan interests. In connection with
these investments, the Funds may also enter into unfunded loan comm-
itments (“commitments”). Commitments may obligate the Funds to furnish
temporary financing to a borrower until permanent financing can be
arranged. In connection with these commitments, the Funds earn a
commitment fee, typically set as a percentage of the commitment
amount. Such fee income, which is classified in the Statements of
Operations as facility and other fees, is recognized ratably over the
commitment period. As of October 31, 2010, BGT had the following
unfunded loan commitments:

 

ANNUAL REPORT

OCTOBER 31, 2010

51

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Notes to Financial Statements (continued)

6. Concentration, Market and Credit Risk:

PSW, PSY, BPP and BTZ invest a significant portion of each of their assets
in securities in the financials sector and BGT invests a significant portion of
its assets in the media sector. Please see the Schedules of Investments for
these securities. Changes in economic conditions 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 (issuer
credit risk). The value of securities held by the Funds may decline in
response to certain events, including those directly involving the issuers
whose securities are owned by the Funds; conditions affecting the general
economy; overall market changes; local, regional or global political, social
or economic instability; and currency and interest rate and price fluctua-
tions. Similar to issuer credit risk, the Funds may be exposed to counter-
party credit risk, or the risk that an entity with which the Funds have
unsettled or open transactions may fail to or be unable to perform on its
commitments. The Funds manage counterparty credit 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 market, issuer and counterparty credit risks, consist principally of
financial instruments and receivables due from counterparties. The extent
of the Funds' exposure to market, issuer and counterparty credit risks with
respect to these financial assets is generally approximated by their value
recorded in the Funds' Statements of Assets and Liabilities, less any collat-
eral 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 October 31, 2010, the shares owned by an affiliate of the Manager
of the Funds were as follows:

 

For the years ended October 31, 2010 and October 31, 2009, shares
issued and outstanding increased by the following amounts as a result
of dividend reinvestment:

 

Shares issued and outstanding for the years ended October 31, 2010 and
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 prefer-
ence 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
Instrument. Each Fund intends to effect such redemptions and/or repur-
chases to the extent necessary to maintain applicable asset coverage
requirements 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
holders 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 Funds' 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 October 31, 2010:

 

52 ANNUAL REPORT

OCTOBER 31, 2010

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Notes to Financial Statements (continued)

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; for BPP 150% of the interest equivalent of the 30-day commercial
paper rate and for BTZ, the higher of 150% times or 1.25% plus the
Telerate/BBA LIBOR rate. The low, high and average dividend rates for the
year ended October 31, 2010 were as follows:

 

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 0.15% to 1.60%
for the year ended October 31, 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 pre-
dict 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%.

The Funds pay commissions of 0.25% on the aggregate principal amount
of all shares that successfully clear their auctions and 0.15% on the
aggregate principal amount of all shares that fail to clear their auctions.
Certain broker dealers have individually agreed to reduce commissions
for failed auctions.

Preferred Shares issued and outstanding remained constant during the
year ended October 31, 2010 for PSW, PSY, BPP, BTZ and BGT. During the
year ended October 31, 2009, the Funds announced the following redemp-
tions of Preferred Shares at a price of $25,000 per share plus any accrued
and unpaid dividends through the redemption dates:

 

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.

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 SSB Agreement provided the
Fund with a maximum commitment of $134 million. 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

ANNUAL REPORT

OCTOBER 31, 2010

53

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Notes to Financial Statements (continued)

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 October 31, 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 year ended October 31, 2010, the daily weighted
average interest rate was 1.37%.

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 bor-
rowings is less than 300%.

For the year ended October 31, 2010, the daily weighted average interest
rates for Funds with reverse repurchase agreements were as follows:

 

9. Income Tax Information:

Reclassifications: US GAAP require that certain components of net assets be adjusted to reflect permanent differences between financial and tax reporting.
These reclassifications have no effect on net assets or net asset values per share. The following permanent differences as of October 31, 2010 attributable
to the accounting for swap agreements, amortization methods on fixed income securities, the classification of investments, and foreign currency transactions
were reclassified to the following accounts:

 

* The differences between book-basis and tax-basis net unrealized gains (losses) were attributable primarily to the tax deferral of losses on wash sales and straddles, the accrual
of income on securities in default, the realization for tax purposes of unrealized gains/losses on certain futures and foreign currency exchange contracts, the timing and recognition
of partnership income, the accounting for swap agreements, the deferral of compensation to directors, the classification of investments, and investments in wholly
owned subsidiaries.

As of October 31, 2010, the Funds had capital loss carryforwards available to offset future realized capital gains through the indicated expiration dates:

 

54 ANNUAL REPORT

OCTOBER 31, 2010

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Notes to Financial Statements (concluded)

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 November 30, 2010
to Common Shareholders of record on November 15, 2010 as follows:

 

Each Fund paid a net investment income dividend on December 20, 2010
to Common Shareholders of record on December 15, 2010 as follows:

 

The dividends declared on Preferred Shares for the period November 1,
2010 to November 30, 2010 were as follows:

 

On November 12, 2010, the Funds’ Boards approved the following redemp-
tions of Preferred Shares at a price of $25,000 per share plus any accrued
and unpaid dividends through the redemption date:

 

The Funds will finance the Preferred Share redemptions with cash received
from either reverse repurchase agreement financing or credit facility financ-
ing on a fund-by-fund basis. The redemption dates for PSY and BTZ are
conditioned upon the absence of any legal impediment to completing the
redemptions as scheduled.

ANNUAL REPORT

OCTOBER 31, 2010

55

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Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Directors of
BlackRock Credit Allocation Income Trust I, Inc. and
BlackRock Credit Allocation Income Trust II, Inc.
and to the Shareholders and Board of Trustees of
BlackRock Credit Allocation Income Trust III,
BlackRock Credit Allocation Income Trust IV and
BlackRock Floating Rate Income Trust
(Collectively the “Trusts”):

We have audited the accompanying statements of assets and liabilities
of BlackRock Credit Allocation Income Trust I, Inc. and BlackRock Credit
Allocation Income Trust II, Inc., including the schedules of investments, as
of October 31, 2010, and the related statements of operations for the year
then ended, the statements of changes in net assets for each of the two
years in the period then ended, and the financial highlights for each of the
five years in the period then ended. We have also audited the accompany-
ing statement of assets and liabilities of BlackRock Credit Allocation
Income Trust III, including the schedule of investments, as of October 31,
2010, and the related statement of operations for the year then ended,
the statements of changes in net assets for each of the two years in
the period then ended, and the financial highlights for each of the two
years in the period ended October 31, 2010, the period January 1, 2008
to October 31, 2008, and each of the three years in the period ended
December 31, 2007. We have also audited the accompanying statement
of assets and liabilities of BlackRock Credit Allocation Income Trust IV,
including the schedule of investments, as of October 31, 2010, and the
related statement of operations for the year then ended, the statements of
changes in net assets for each of the two years in the period then ended,
and the financial highlights for each of the three years in the period ended
October 31, 2010 and the period December 27, 2006 (commencement
of operations) to October 31, 2007. We have also audited the accompany-
ing statement of assets and liabilities of BlackRock Floating Rate Income
Trust, including the schedule of investments, as of October 31, 2010, and
the related statements of operations and cash flows for the year then
ended, the statements of changes in net assets for each of the two years
in the period then ended, and the financial highlights for each of the two
years in the period ended October 31, 2010, the period January 1, 2008
to October 31, 2008, and each of the three years in the period ended
December 31, 2007. These financial statements and financial highlights
are the responsibility of the Trusts’ management. Our responsibility is to
express an opinion on these financial statements and financial highlights
based on our audits.

We conducted our audits in accordance with the standards of the Public
Company Accounting Oversight Board (United States). Those standards
require that we plan and perform the audit to obtain reasonable assurance
about whether the financial statements and financial highlights are free of
material misstatement. The Trusts are not required to have, nor were we
engaged to perform, an audit of their internal control over financial report-
ing. Our audits included consideration of internal control over financial
reporting as a basis for designing audit procedures that are appropriate in
the circumstances, but not for the purpose of expressing an opinion on the
effectiveness of the Trusts’ internal control over financial reporting.
Accordingly, we express no such opinion. An audit also includes examining,

on a test basis, evidence supporting the amounts and disclosures in the
financial statements, assessing the accounting principles used and signifi-
cant estimates made by management, as well as evaluating the overall
financial statement presentation. Our procedures included confirmation of
the securities owned as of October 31, 2010, by correspondence with the
custodian, brokers and agent banks; where replies were not received from
brokers or agent banks, we performed other auditing procedures. We
believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to
above present fairly, in all material respects, the financial positions of
BlackRock Credit Allocation Income Trust I, Inc. and BlackRock Credit
Allocation Income Trust II, Inc., the results of their operations for the year
then ended, the changes in their net assets for each of the two years in the
period then ended, and the financial highlights for each of the five years in
the period then ended, in conformity with accounting principles generally
accepted in the United States of America. Additionally, in our opinion, the
financial statements and financial highlights referred to above present
fairly, in all material respects, the financial position of BlackRock Credit
Allocation Income Trust III, the results of its operations for the year then
ended, the changes in its net assets for each of the two years in the period
then ended, and the financial highlights for each of the two years in the
period ended October 31, 2010, the period January 1, 2008 to October
31, 2008, and each of the three years in the period ended December 31,
2007, in conformity with accounting principles generally accepted in the
United States of America. Additionally, in our opinion, the financial state-
ments and financial highlights referred to above present fairly, in all mate-
rial respects, the financial position of BlackRock Credit Allocation Income
Trust IV, the results of its operations for the year then ended, the changes in
its net assets for each of the two years in the period then ended, and the
financial highlights for each of the three years in the period ended October
31, 2010 and the period December 27, 2006 (commencement of opera-
tions) to October 31, 2007, in conformity with accounting principles gener-
ally accepted in the United States of America. Additionally, in our opinion,
the financial statements and financial highlights referred to above present
fairly, in all material respects, the financial position of BlackRock Floating
Rate Income Trust, the results of its operations and its cash flows for the
year then ended, the changes in its net assets for each of the two years in
the period then ended, and the financial highlights for each of the two
years in the period ended October 31, 2010, the period January 1, 2008
to October 31, 2008, and each of the three years in the period ended
December 31, 2007, in conformity with accounting principles generally
accepted in the United States of America.

Deloitte & Touche LLP
Princeton, New Jersey
December 23, 2010

56 ANNUAL REPORT

OCTOBER 31, 2010

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Important Tax Information

The following information is provided with respect to the ordinary income distributions paid by the Funds for the taxable year ended October 31, 2010.

 

* The Funds hereby designate the percentage indicated above or the maximum amount allowable by law.
** Represents the portion of taxable ordinary income dividends eligible for exemption from US withholding tax for nonresident aliens and foreign corporations.
*** The law varies in each state as to whether and what percentage of dividend income attributable to federal obligations is exempt from state income tax. We recommend that you
consult your tax advisor to determine if any portion of the dividends you received is exempt from state income taxes.
† Includes dividend paid on January 11, 2010 to PSW, PSY, BPP, BTZ and BGT Common Shareholders.

ANNUAL REPORT

OCTOBER 31, 2010

57

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Disclosure of Investment Advisory Agreements and Sub-Advisory Agreements

The Board of Directors and the Board of Trustees, as the case may be
(each, a “Board,” and, collectively, the "Boards," and the members of which
are referred to as "Board Members") of each of 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”) and BlackRock Floating
Rate Income Trust (“BGT,” and together with PSW, PSY, BPP and BTZ, each
a “Fund” and, collectively, the “Funds”) met on April 8, 2010 and May
13 — 14, 2010 to consider the approval of each Fund’s investment advi-
sory agreement (collectively, the “Advisory Agreements”) with BlackRock
Advisors, LLC (the “Manager”), each Fund’s investment advisor. The Boards
also considered the approval of the sub-advisory agreement (collectively,
the “Sub-Advisory Agreements”) between the Manager and BlackRock
Financial Management, Inc. (the “Sub-Advisor”), with respect to each Fund.
The Manager and the Sub-Advisor are referred to herein as “BlackRock.”
The Advisory Agreements and the Sub-Advisory Agreements are referred to
herein as the “Agreements.”

Activities and Composition of the Board

The Board of each Fund consists of ten individuals, eight of whom are
not “interested persons” of the Funds as defined in the Investment
Company Act of 1940 (the “1940 Act”) (the “Independent Board
Members”). The Board Members are responsible for the oversight of the
operations of each Fund and perform the various duties imposed on the
directors of investment companies by the 1940 Act. The Independent
Board Members have retained independent legal counsel to assist them
in connection with their duties. The Chairman of each Board is an
Independent Board Member. Each Board has established five standing
committees: an Audit Committee, a Governance and Nominating
Committee, a Compliance Committee, a Performance Oversight Committee
and an Executive Committee, each of which is composed of Independent
Board Members (except for the Executive Committee, which also has one
interested Board Member) and is chaired by an Independent Board
Member. Each Board also has two ad hoc committees, the Joint Product
Pricing Committee, which consists of Independent Board Members and the
directors/trustees of the boards of certain other BlackRock-managed
funds, who are not “interested persons” of their respective funds, and the
Ad Hoc Committee on Auction Market Preferred Shares.

The Agreements

Pursuant to the 1940 Act, the Boards are required to consider the continu-
ation of the Agreements on an annual basis. In connection with this
process, the Boards assessed, among other things, the nature, scope
and quality of the services provided to the Funds by the personnel of
BlackRock and its affiliates, including investment management, administra-
tive and shareholder services, oversight of fund accounting and custody,
marketing services and assistance in meeting applicable legal and
regulatory requirements.

From time to time throughout the year, the Boards, acting directly and
through their committees, considered at each of their meetings factors
that are relevant to their annual consideration of the renewal of the
Agreements, including the services and support provided by BlackRock to

the Funds and their shareholders. Among the matters the Boards consid-
ered were: (a) investment performance for one-, three- and five-year peri-
ods, as applicable, against peer funds, and applicable benchmarks, if any,
as well as senior management's and portfolio managers’ analysis of the
reasons for any over performance or underperformance against a Fund’s
peers and/or benchmark, as applicable; (b) fees, including advisory and
other amounts paid to BlackRock and its affiliates by each Fund for serv-
ices such as call center and fund accounting; (c) each Fund’s operating
expenses; (d) the resources devoted to and compliance reports relating to
each Fund’s investment objective, policies and restrictions; (e) each Fund’s
compliance with its Code of Ethics and compliance policies and proce-
dures; (f) the nature, cost and character of non-investment management
services provided by BlackRock and its affiliates; (g) BlackRock’s and other
service providers’ internal controls; (h) BlackRock’s implementation of the
proxy voting policies approved by the Boards; (i) execution quality of port-
folio transactions; (j) BlackRock’s implementation of each Fund’s valuation
and liquidity procedures; (k) an analysis of contractual and actual man-
agement fees for products with similar investment objectives across the
open-end fund, closed-end fund and institutional account product chan-
nels, as applicable; and (l) periodic updates on BlackRock’s business.

Board Considerations in Approving the Agreements

The Approval Process: Prior to the April 8, 2010 meeting, the Boards
requested and each received materials specifically relating to the
Agreements. The Boards are engaged in a process with BlackRock to peri-
odically review the nature and scope of the information provided to better
assist their deliberations. The materials provided in connection with the
April meeting included (a) information independently compiled and pre-
pared by Lipper, Inc. (“Lipper”) on Fund fees and expenses, and the invest-
ment performance of each Fund as compared with a peer group of funds
as determined by Lipper, and in the case of PSW, PSY, BPP and BTZ, a
customized peer group selected by BlackRock (collectively, “Peers”); (b)
information on the profitability of the Agreements to BlackRock and a dis-
cussion of fall-out benefits to BlackRock and its affiliates and significant
shareholders; (c) a general analysis provided by BlackRock concerning
investment advisory fees charged to other clients, such as institutional
clients and open-end funds, under similar investment mandates; (d) the
impact of economies of scale; (e) a summary of aggregate amounts paid
by each Fund to BlackRock and (f) if applicable, a comparison of manage-
ment fees to similar BlackRock closed-end funds, as classified by Lipper.

At an in-person meeting held on April 8, 2010, the Boards reviewed materi-
als relating to their consideration of the Agreements. As a result of the dis-
cussions that occurred during the April 8, 2010 meeting, the Boards
presented BlackRock with questions and requests for additional informa-
tion and BlackRock responded to these requests with additional written
information in advance of the May 13 — 14, 2010 Board meeting.

At an in-person meeting held on May 13 — 14, 2010, each Board, includ-
ing its Independent Board Members, unanimously approved the continua-
tion of the Advisory Agreement between the Manager and its respective
Fund and the Sub-Advisory Agreement between the Manager and the

58 ANNUAL REPORT

OCTOBER 31, 2010

---

Disclosure of Investment Advisory Agreements and Sub-Advisory Agreements (continued)

Sub-Advisor with respect to its respective Fund, each for a one-year term
ending June 30, 2011. In approving the continuation of the Agreements,
the Boards considered: (a) the nature, extent and quality of the services
provided by BlackRock; (b) the investment performance of each Fund and
BlackRock; (c) the advisory fee and the cost of the services and profits to
be realized by BlackRock and its affiliates from their relationship with each
Fund; (d) economies of scale; and (e) other factors deemed relevant by
the Board Members.

The Boards also considered other matters they deemed important to the
approval process, such as services related to the valuation and pricing of
each Fund’s portfolio holdings, direct and indirect benefits to BlackRock
and its affiliates and significant shareholders from their relationship with
each Fund and advice from independent legal counsel with respect to the
review process and materials submitted for the Boards’ review. The Boards
noted the willingness of BlackRock personnel to engage in open, candid
discussions with the Boards. The Boards did not identify any particular
information as controlling, and each Board Member may have attributed
different weights to the various items considered.

A. Nature, Extent and Quality of the Services Provided by BlackRock:
The Boards, including the Independent Board Members, reviewed the
nature, extent and quality of services provided by BlackRock, including the
investment advisory services and the resulting performance of each Fund.
Throughout the year, the Boards compared each Fund’s performance to the
performance of a comparable group of closed-end funds, and the perform-
ance of a relevant benchmark, if any. The Boards met with BlackRock’s sen-
ior management personnel responsible for investment operations, including
the senior investment officers. The Boards also reviewed the materials pro-
vided by each Fund’s portfolio management team discussing each Fund’s
performance and each Fund’s investment objective, strategies and outlook.

The Boards considered, among other factors, the number, education and
experience of BlackRock’s investment personnel generally and each Fund’s
portfolio management team, investments by portfolio managers in the
funds they manage, BlackRock’s portfolio trading capabilities, BlackRock’s
use of technology, BlackRock’s commitment to compliance, BlackRock's
credit analysis capabilities, BlackRock's risk analysis capabilities and
BlackRock’s approach to training and retaining portfolio managers and
other research, advisory and management personnel. The Boards also
reviewed a general description of BlackRock’s compensation structure with
respect to each Fund’s portfolio management team and BlackRock’s ability
to attract and retain high-quality talent.

In addition to advisory services, the Boards considered the quality of the
administrative and non-investment advisory services provided to each
Fund. BlackRock and its affiliates and significant shareholders provide
each Fund with certain administrative and other services (in addition to
any such services provided to each Fund by third parties) and officers
and other personnel as are necessary for the operations of each Fund. In
addition to investment advisory services, BlackRock and its affiliates pro-
vide each Fund with other services, including (i) preparing disclosure docu-
ments, such as the prospectus and the statement of additional information
in connection with the initial public offering and periodic shareholder

reports; (ii) preparing communications with analysts to support secondary
market trading of each Fund; (iii) assisting with daily accounting and pric-
ing; (iv) preparing periodic filings with regulators and stock exchanges; (v)
overseeing and coordinating the activities of other service providers; (vi)
organizing Board meetings and preparing the materials for such Board
meetings; (vii) providing legal and compliance support; and (viii) perform-
ing other administrative functions necessary for the operation of each
Fund, such as tax reporting, fulfilling regulatory filing requirements, and call
center services. The Boards reviewed the structure and duties of
BlackRock’s fund administration, accounting, legal and compliance depart-
ments and considered BlackRock’s policies and procedures for assuring
compliance with applicable laws and regulations.

B. The Investment Performance of the Funds and BlackRock: The Boards,
including the Independent Board Members, also reviewed and considered
the performance history of each Fund. In preparation for the April 8, 2010
meeting, the Boards were provided with reports, independently prepared by
Lipper, which included a comprehensive analysis of each Fund’s perform-
ance. The Boards also reviewed a narrative and statistical analysis of the
Lipper data that was prepared by BlackRock, which analyzed various fac-
tors that affect Lipper’s rankings. In connection with their reviews, the
Boards received and reviewed information regarding the investment per-
formance of each Fund as compared to a representative group of similar
funds as determined by Lipper and to all funds in each Fund’s applicable
Lipper category, and in the case of PSW, PSY, BTZ and BPP, a customized
peer group selected by BlackRock. The Boards were provided with a
description of the methodology used by Lipper to select peer funds. The
Boards regularly review the performance of each Fund throughout the year.

The Board of BGT noted that, in general, BGT performed better than
its Peers in that BGT’s performance was at or above the median of its
Lipper Performance Universe in two of the one-, three- and five-year
periods reported.

The Board of BTZ noted that, in general, BTZ performed better than its
Peers in that BTZ’s performance was at or above the median of its
Customized Lipper Peer Group in the three-year period reported.
Additionally, working with the Board of BTZ, BlackRock has restructured
BTZ to focus on investment grade corporate bonds, high yield bonds and
other opportunistic asset classes, including bank loans, preferred stock
and convertible bonds.

The Boards of PSW and PSY noted that PSW and PSY performed below the
median of their respective Customized Lipper Peer Group in the three- and
five-year periods reported, but that each Fund performed better than or
equal to the median of its Customized Lipper Peer Group in the one-year
period reported. The Boards of PSW and PSY and BlackRock reviewed the
reasons for each Fund's underperformance during the three- and five-year
periods compared with its Peers. The Boards of PSW and PSY were
informed that, among other things, being underweight to retail preferreds
hurt each Fund relative to its Peers.

The Board of BPP noted that BPP performed below the median of its
Customized Lipper Peer Group in each of the one-, three- and five-year

ANNUAL REPORT

OCTOBER 31, 2010

59

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Disclosure of Investment Advisory Agreements and Sub-Advisory Agreements (continued)

periods reported. The Board of BPP and BlackRock reviewed the reasons
for BPP’s underperformance during these periods compared with its Peers.
The Board of BPP was informed that, among other things, being under-
weight to retail preferreds hurt BPP relative to Peers.

The Boards of PSW, PSY and BPP and BlackRock discussed BlackRock’s
strategy for improving each Fund's performance and BlackRock’s commit-
ment to providing the resources necessary to assist each Fund's portfolio
managers and to improve each Fund's performance. Additionally, working
with the Boards of PSW, PSY and BPP, BlackRock has restructured each
Fund to focus on investment grade corporate bonds, high yield bonds and
other opportunistic asset classes, including bank loans, preferred stock
and convertible bonds.

The Boards noted that BlackRock has made changes to the organization of
the overall fixed income group management structure designed to result in
a strengthened leadership team with clearer accountability.

C. Consideration of the Advisory Fees and the Cost of the Services and
Profits to be Realized by BlackRock and its Affiliates from their
Relationship with the Funds: The Boards, including the Independent
Board Members, reviewed each Fund’s contractual advisory fee rate com-
pared with the other funds in its Lipper category. The Boards also com-
pared each Fund’s total expenses, as well as actual management fees,
to those of other funds in its Lipper category. The Boards considered the
services provided and the fees charged by BlackRock to other types of
clients with similar investment mandates, including separately managed
institutional accounts.

The Boards received and reviewed statements relating to BlackRock’s
financial condition and profitability with respect to the services it provided
each Fund. The Boards were also provided with a profitability analysis
that detailed the revenues earned and the expenses incurred by BlackRock
for services provided to each Fund. The Boards reviewed BlackRock’s
profitability with respect to each Fund and other funds the Boards currently
oversee for the year ended December 31, 2009 compared to available
aggregate profitability data provided for the year ended December 31,
2008. The Boards reviewed BlackRock’s profitability with respect to
other fund complexes managed by the Manager and/or its affiliates. The
Boards reviewed BlackRock’s assumptions and methodology of allocating
expenses in the profitability analysis, noting the inherent limitations in allo-
cating costs among various advisory products. The Boards recognized that
profitability may be affected by numerous factors including, among other
things, fee waivers and expense reimbursements by the Manager, the types
of funds managed, expense allocations and business mix, and the difficulty
of comparing profitability as a result of those factors.

The Boards noted that, in general, individual fund or product line profitabil-
ity of other advisors is not publicly available. Nevertheless, to the extent
such information was available, the Boards considered BlackRock’s overall
operating margin, in general, compared to the operating margin for leading
investment management firms whose operations include advising closed-
end funds, among other product types. That data indicates that operating
margins for BlackRock with respect to its registered funds are generally
consistent with margins earned by similarly situated publicly traded

competitors. In addition, the Boards considered, among other things, cer-
tain third party data comparing BlackRock’s operating margin with that of
other publicly-traded asset management firms. That third party data indi-
cates that larger asset bases do not, in themselves, translate to higher
profit margins.

In addition, the Boards considered the cost of the services provided to
each Fund by BlackRock, and BlackRock’s and its affiliates’ profits relating
to the management and distribution of each Fund and the other funds
advised by BlackRock and its affiliates. As part of their analysis, the Boards
reviewed BlackRock’s methodology in allocating its costs to the manage-
ment of each Fund. The Boards also considered whether BlackRock has the
financial resources necessary to attract and retain high quality investment
management personnel to perform its obligations under the Agreements
and to continue to provide the high quality of services that is expected by
the Boards.

Each Board noted that its respective Fund's contractual management fee
rate was lower than or equal to the median contractual management fee
rate paid by the Fund's Peers, in each case, before taking into account any
expense reimbursements or fee waivers.

D. Economies of Scale: The Boards, including the Independent Board
Members, considered the extent to which economies of scale might be
realized as the assets of each Fund increase. The Boards also considered
the extent to which each Fund benefits from such economies and whether
there should be changes in the advisory fee rate or structure in order to
enable each Fund to participate in these economies of scale, for example
through the use of breakpoints in the advisory fee based upon the asset
level of each Fund.

The Boards noted that most closed-end fund complexes do not have fund
level breakpoints because closed-end funds generally do not experience
substantial growth after the initial public offering and each fund is man-
aged independently consistent with its own investment objectives. The
Boards noted that only one closed-end fund in the Fund Complex has
breakpoints in its fee structure. Information provided by Lipper also
revealed that only one closed-end fund complex with total closed-end
fund nets assets exceeding $10 billion, as of December 31, 2009, used
a complex level breakpoint structure.

E. Other Factors Deemed Relevant by the Board Members: The Boards,
including the Independent Board Members, also took into account other
ancillary or “fall-out” benefits that BlackRock or its affiliates and significant
shareholders may derive from their respective relationships with the Funds,
both tangible and intangible, such as BlackRock’s ability to leverage its
investment professionals who manage other portfolios, an increase in
BlackRock’s profile in the investment advisory community, and the engage-
ment of BlackRock’s affiliates and significant shareholders as service
providers to the Funds, including for administrative and distribution serv-
ices. The Boards also considered BlackRock’s overall operations and its
efforts to expand the scale of, and improve the quality of, its operations.
The Boards also noted that BlackRock may use and benefit from third
party research obtained by soft dollars generated by certain mutual fund

60 ANNUAL REPORT

OCTOBER 31, 2010

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Disclosure of Investment Advisory Agreements and Sub-Advisory Agreements (concluded)

transactions to assist in managing all or a number of its other client
accounts. The Boards further noted that BlackRock completed the acquisi-
tion of a complex of exchange-traded funds (“ETFs”) on December 1,
2009, and that BlackRock’s funds may invest in such ETFs without any off-
set against the management fees payable by the funds to BlackRock.

In connection with its consideration of the Agreements, the Boards also
received information regarding BlackRock’s brokerage and soft dollar prac-
tices. The Boards received reports from BlackRock which included informa-
tion on brokerage commissions and trade execution practices throughout
the year.

The Boards noted the competitive nature of the closed-end fund market-
place, and that shareholders are able to sell their respective Fund shares
in the secondary market if they believe that the Fund’s fees and expenses
are too high or if they are dissatisfied with the performance of the Fund.

Conclusion

Each Board, including its Independent Board Members, unanimously
approved the continuation of the Advisory Agreement between the Manager
and its respective Fund for a one-year term ending June 30, 2011 and
the Sub-Advisory Agreement between the Manager and the Sub-Advisor,
with respect to its respective Fund, for a one-year term ending June 30,
2011. As part of its approval, each Board considered the discussions of
BlackRock’s fee structure, as it applies to its respective Fund, being con-
ducted by the ad hoc Joint Product Pricing Committee. Based upon its
evaluation of all of the aforementioned factors in their totality, each Board,
including its Independent Board Members, was satisfied that the terms of
the Agreements were fair and reasonable and in the best interest of its
respective Fund and its shareholders. In arriving at a decision to approve
the Agreements, none of the Boards identified any single factor or group of
factors as all-important or controlling, but considered all factors together,
and different Board Members may have attributed different weights to the
various factors considered. The Independent Board Members were also
assisted by the advice of independent legal counsel in making this deter-
mination. The contractual fee arrangements for each Fund reflect the
results of several years of review by the Board Members and predecessor
Board Members, and discussions between such Board Members (and
predecessor Board Members) and BlackRock. Certain aspects of the
arrangements may be the subject of more attention in some years than in
others, and the Board Members’ conclusions may be based in part on their
consideration of these arrangements in prior years.

ANNUAL REPORT

OCTOBER 31, 2010

61

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Automatic Dividend Reinvestment Plans

Pursuant to each Fund’s Dividend Reinvestment Plan (the “Reinvestment
Plan”), Common Shareholders are automatically enrolled to have all distri-
butions of dividends and capital gains reinvested by Computershare Trust
Company, N.A. (the “Plan Agent”) in the respective Fund’s shares pursuant
to the Reinvestment Plan. Shareholders who do not participate in the
Reinvestment Plan will receive all distributions in cash paid by check and
mailed directly to the shareholders of record (or if the shares are held in
street or other nominee name, then to the nominee) by the Plan Agent,
which serves as agent for the shareholders in administering the
Reinvestment Plan.

After the Funds declare a dividend or determine to make a capital gain dis-
tribution, the Plan Agent will acquire shares for the participants’ accounts,
depending upon the following circumstances, either (i) through receipt of
unissued but authorized shares from the Fund (“newly issued shares”) or
(ii) by purchase of outstanding shares on the open market, on the Fund’s
primary exchange (“open-market purchases”). If, on the dividend payment
date, the net asset value per share (“NAV”) is equal to or less than the
market price per share plus estimated brokerage commissions (such condi-
tion often referred to as a “market premium”), the Plan Agent will invest the
dividend amount in newly issued shares on behalf of the participants. The
number of newly issued shares to be credited to each participant’s account
will be determined by dividing the dollar amount of the dividend by the
NAV on the date the shares are issued. However, if the NAV is less than
95% of the market price on the payment date, the dollar amount of the
dividend will be divided by 95% of the market price on the payment date.
If, on the dividend payment date, the NAV is greater than the market value
per share plus estimated brokerage commissions (such condition often
referred to as a “market discount”), the Plan Agent will invest the dividend
amount in shares acquired on behalf of the participants in open-market
purchases. If the Plan Agent is unable to invest the full dividend amount in
open market purchases, or if the market discount shifts to a market pre-
mium during the purchase period, the Plan Agent will invest any un-
invested portion in newly issued shares.

Participation in the Reinvestment Plan is completely voluntary and may be
terminated or resumed at any time without penalty by notice if received
and processed by the Plan Administrator prior to the dividend record date;
otherwise such termination or resumption will be effective with respect to
any subsequently declared dividend or other distribution.

The Plan Agent’s fees for the handling of the reinvestment of dividends and
distributions will be paid by each Fund. However, each participant will pay
a pro rata share of brokerage commissions incurred with respect to the
Plan Agent’s open market purchases in connection with the reinvestment of
dividends and distributions. The automatic reinvestment of dividends and
distributions will not relieve participants of any federal income tax that may
be payable on such dividends or distributions.

Each Fund reserves the right to amend or terminate the Reinvestment
Plan. There is no direct service charge to participants in the Reinvestment
Plan; however, each Fund reserves the right to amend the Reinvestment
Plan to include a service charge payable by the participants. Participants
that request a sale of shares through Computershare Trust Company, N.A.
are subject to a $2.50 sales fee and a $0.15 per share sold brokerage
commission. All correspondence concerning the Plan should be directed
to Computershare Trust Company, N.A., P.O. Box 43078, Providence,
RI 02940-3078, Telephone: (800) 699-1BFM or overnight correspon-
dence should be directed to the Plan Agent at 250 Royall Street, Canton,
MA 02021.

62 ANNUAL REPORT

OCTOBER 31, 2010

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ANNUAL REPORT

OCTOBER 31, 2010

63

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³ Mr. Davis is an “interested person,” as defined in the Investment Company Act of 1940, of the Funds based on his position with BlackRock, Inc. and its
affiliates. Mr. Gabbay is an “interested person” of the Funds based on his former positions with BlackRock, Inc. and its affiliates as well as his ownership
of BlackRock, Inc. and The PNC Financial Services Group, Inc. securities. Directors serve until their resignation, removal or death, or until December 31 of
the year in which they turn 72.

64 ANNUAL REPORT

OCTOBER 31, 2010

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Officers and Directors (concluded)

 

¹ Officers of the Funds serve at the pleasure of the Board.

² Ms. Ackerley has been President and Chief Executive officer since 2009 and was Vice President from 2007 to 2009.

 

ANNUAL REPORT

OCTOBER 31, 2010

65

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Additional Information

Proxy Results

The Annual Meeting of Shareholders was held on September 2, 2010 for shareholders of record on July 6, 2010, to elect trustee nominees for each Trust.
There were no broker non-votes with regard to any non-routine matter for any of the Funds. Due to a lack of quorum of preferred shares, action on the pro-
posal regarding the preferred shares nominees' election for BlackRock Credit Allocation Income Trust I, Inc. and BlackRock Credit Allocation Income Trust II,
Inc. was subsequently adjourned to October 5, 2010.

 

For the Funds listed above, Trustees whose term of office continued after the Annual Meeting of Shareholders because they were not up for election are Richard S. Davis, Frank J. Fabozzi,
James T. Flynn, R. Glenn Hubbard, W. Carl Kester and Karen P. Robards.

 

66 ANNUAL REPORT

OCTOBER 31, 2010

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Additional Information (continued)

Fund Certification

Each Fund is listed for trading on the New York Stock Exchange (“NYSE”)
and have filed with the NYSE their annual chief executive officer certification
regarding compliance with the NYSE’s listing standards.

The Funds filed with the SEC the certification of its chief executive
officer and chief financial officer required by section 302 of the
Sarbanes-Oxley Act.

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.

ANNUAL REPORT

OCTOBER 31, 2010

67

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Additional Information (continued)

General Information

On July 29, 2010, the Manager announced that a derivative complaint
had been filed by shareholders of PSY and BTZ on July 27, 2010 in the
Supreme Court of the State of New York, New York County. The complaint
names the Manager, BlackRock, Inc. and certain of the directors, officers
and portfolio managers of PSY and BTZ as defendants. The complaint
alleges, among other things, that the parties named in the complaint
breached fiduciary duties owed to PSY and BTZ and their Common
Shareholders by redeeming auction-market preferred shares, auction
rate preferred securities, auction preferred shares and auction rate securi-
ties (collectively, “AMPS”) at their liquidation preference. The complaint
seeks unspecified damages for losses purportedly suffered by PSY and
BTZ as a result of the prior redemptions and injunctive relief preventing
PSY and BTZ from redeeming AMPS at their liquidation preference in the
future. The Manager, BlackRock, Inc. and the other parties named in the
complaint believe that the claims asserted in the complaint are without
merit and intend to vigorously defend themselves in the litigation.

On November 15, 2010, the Manager announced the intention to redeem
all of the outstanding auction rate preferred shares (ARPS) issued by five
of its taxable closed-end funds: PSW, PSY, BPP, BTZ, and BGT. The
announced redemptions encompass all remaining taxable ARPS issued
by BlackRock closed-end funds and total approximately $569 million.
BlackRock announced that the ARPS would be redeemed with available
cash or proceeds from reverse repurchase agreement financing or a credit
facility on a fund-by-fund basis and, in each case, the refinancing is
expected to result in a lower cost of financing for each fund under current
market conditions.

In exchange for the shareholder plaintiff's agreement to withdraw a previ-
ously filed motion for preliminary injunction enjoining any further redemp-
tions of ARPS, each of these funds agreed to provide the plaintiffs in those
actions with 30 days prior notice of any additional redemptions. On
November 24, 2010, the Manager announced that counsel for the plaintiffs
filed a motion for a preliminary injunction enjoining PSY and BTZ from
redeeming outstanding AMPS pending final resolution of the underlying
shareholder derivative suit. The Manager announced that it intends to vigor-
ously oppose the motion announced that it intends to vigorously oppose
the motion and complete the previously announced redemption of AMPS
by PSY and BTZ as previously announced, although the redemption dates
for BTZ and PSY are conditioned upon the absence of any legal impedi-
ments to completing the redemptions as scheduled.

BlackRock will continue to keep market participants and shareholders
informed of its closed-end funds’ progress to redeem ARPS via press
releases and on BlackRock’s website at www.blackrock.com.

68 ANNUAL REPORT

OCTOBER 31, 2010

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Additional Information (concluded)

General Information (concluded)

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.

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) without charge, upon request, by calling toll-free (800) 441-7762;
(2) at http://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
http://www.blackrock.com or by calling (800) 441-7762 and (2) on
the SEC’s website at http://www.sec.gov.

Availability of Fund Updates

BlackRock will update performance data for the Funds on a
monthly basis on its website in the “Closed-end Funds” section of
http://www.blackrock.com. Investors and others are advised to periodically
check the website for updated performance information and the release of
other material information about the Funds.

ANNUAL REPORT

OCTOBER 31, 2010

69

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Additional Information (concluded)

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.

 

PSW, PSY, BPP and BTZ 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’.

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.

70 ANNUAL REPORT

OCTOBER 31, 2010

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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.

#CE-EQFI- 6 -10/10

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Item 2 – Code of Ethics – The registrant (or the “Fund”) has adopted a code of ethics, as of the end
of the period covered by this report, applicable to the registrant’s principal executive officer,
principal financial officer and principal accounting officer, or persons performing similar
functions. During the period covered by this report, there have been no amendments to or
waivers granted under the code of ethics. A copy of the code of ethics is available without
charge at www.blackrock.com.

Item 3 – Audit Committee Financial Expert – The registrant’s board of directors or trustees, as
applicable (the “board of directors”), has determined that (i) the registrant has the following
audit committee financial experts serving on its audit committee and (ii) each audit
committee financial expert is independent:
Kent Dixon (retired effective December 31, 2009)
Frank J. Fabozzi
James T. Flynn
W. Carl Kester
Karen P. Robards

The registrant’s board of directors has determined that W. Carl Kester and Karen P. Robards
qualify as financial experts pursuant to Item 3(c)(4) of Form N-CSR.

Prof. Kester has a thorough understanding of generally accepted accounting principles,
financial statements and internal control over financial reporting as well as audit committee
functions. Prof. Kester has been involved in providing valuation and other financial
consulting services to corporate clients since 1978. Prof. Kester’s financial consulting
services present a breadth and level of complexity of accounting issues that are generally
comparable to the breadth and complexity of issues that can reasonably be expected to be
raised by the registrant’s financial statements.

Ms. Robards has a thorough understanding of generally accepted accounting principles,
financial statements and internal control over financial reporting as well as audit committee
functions. Ms. Robards has been President of Robards & Company, a financial advisory
firm, since 1987. Ms. Robards was formerly an investment banker for more than 10 years
where she was responsible for evaluating and assessing the performance of companies based
on their financial results. Ms. Robards has over 30 years of experience analyzing financial
statements. She also is a member of the audit committee of one publicly held company and
a non-profit organization.

Under applicable securities laws, a person determined to be an audit committee financial
expert will not be deemed an “expert” for any purpose, including without limitation for the
purposes of Section 11 of the Securities Act of 1933, as a result of being designated or
identified as an audit committee financial expert. The designation or identification as an
audit committee financial expert does not impose on such person any duties, obligations, or
liabilities greater than the duties, obligations, and liabilities imposed on such person as a
member of the audit committee and board of directors in the absence of such designation or
identification. The designation or identification as an audit committee financial expert does
not affect the duties, obligations, or liability of any other member of the audit committee or
board of directors.

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1 The nature of the services include assurance and related services reasonably related to the performance of the audit of
financial statements not included in Audit Fees.
2 The nature of the services include tax compliance, tax advice and tax planning.
3 The nature of the services include a review of compliance procedures and attestation thereto.

(e)(1) Audit Committee Pre-Approval Policies and Procedures:
The registrant’s audit committee (the “Committee”) has adopted policies and
procedures with regard to the pre-approval of services. Audit, audit-related and tax
compliance services provided to the registrant on an annual basis require specific pre-
approval by the Committee. The Committee also must approve other non-audit services
provided to the registrant and those non-audit services provided to the registrant’s affiliated
service providers that relate directly to the operations and the financial reporting of the
registrant. Certain of these non-audit services that the Committee believes are a) consistent
with the SEC’s auditor independence rules and b) routine and recurring services that will
not impair the independence of the independent accountants may be approved by the
Committee without consideration on a specific case-by-case basis (“general pre-approval”).
The term of any general pre-approval is 12 months from the date of the pre-approval, unless
the Committee provides for a different period. Tax or other non-audit services provided to
the registrant which have a direct impact on the operation or financial reporting of the
registrant will only be deemed pre-approved provided that any individual project does not
exceed $10,000 attributable to the registrant or $50,000 per project. For this purpose,
multiple projects will be aggregated to determine if they exceed the previously mentioned
cost levels.

Any proposed services exceeding the pre-approved cost levels will require specific
pre-approval by the Committee, as will any other services not subject to general pre-
approval (e.g., unanticipated but permissible services). The Committee is informed of each
service approved subject to general pre-approval at the next regularly scheduled in-person
board meeting. At this meeting, an analysis of such services is presented to the Committee
for ratification. The Committee may delegate to the Committee Chairman the authority to
approve the provision of and fees for any specific engagement of permitted non-audit
services, including services exceeding pre-approved cost levels.

(e)(2) None of the services described in each of Items 4(b) through (d) were approved by
the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X.

(f) Not Applicable

(g) Affiliates’ Aggregate Non-Audit Fees:

 

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(h) The registrant’s audit committee has considered and determined that the provision of
non-audit services that were rendered to the registrant’s investment adviser (not including
any non-affiliated sub-adviser whose role is primarily portfolio management and is
subcontracted with or overseen by the registrant’s investment adviser), and any entity
controlling, controlled by, or under common control with the investment adviser that
provides ongoing services to the registrant that were not pre-approved pursuant to paragraph
(c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal
accountant’s independence.

Regulation S-X Rule 2-01(c)(7)(ii) – $10,777, 0%

Item 5 – Audit Committee of Listed Registrants

(a) The following individuals are members of the registrant’s separately-designated
standing audit committee established in accordance with Section 3(a)(58)(A) of the
Securities Exchange Act of 1934 (15 U.S.C. 78c(a)(58)(A)):

Kent Dixon (retired effective December 31, 2009)
Frank J. Fabozzi
James T. Flynn
W. Carl Kester
Karen P. Robards

(b) Not Applicable

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 – The board of directors has delegated the voting of proxies for the
Fund securities to the Fund’s investment adviser (“Investment Adviser”) pursuant to the
Investment Adviser’s proxy voting guidelines. Under these guidelines, the Investment
Adviser will vote proxies related to Fund securities in the best interests of the Fund and its
stockholders. From time to time, a vote may present a conflict between the interests of the
Fund’s stockholders, on the one hand, and those of the Investment Adviser, or any affiliated
person of the Fund or the Investment Adviser, on the other. In such event, provided that the
Investment Adviser’s Equity Investment Policy Oversight Committee, or a sub-committee
thereof (the “Oversight Committee”) is aware of the real or potential conflict or material
non-routine matter and if the Oversight Committee does not reasonably believe it is able to
follow its general voting guidelines (or if the particular proxy matter is not addressed in the
guidelines) and vote impartially, the Oversight Committee may retain an independent
fiduciary to advise the Oversight Committee on how to vote or to cast votes on behalf of the
Investment Adviser’s clients. If the Investment Adviser determines not to retain an
independent fiduciary, or does not desire to follow the advice of such independent fiduciary,
the Oversight Committee shall determine how to vote the proxy after consulting with the
Investment Adviser’s Portfolio Management Group and/or the Investment Adviser’s Legal
and Compliance Department and concluding that the vote cast is in its client’s best interest

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notwithstanding the conflict. A copy of the Fund’s Proxy Voting Policy and Procedures are
attached as Exhibit 99.PROXYPOL. Information on how the Fund voted proxies relating to
portfolio securities during the most recent 12-month period ended June 30 is available
without charge, (i) at www.blackrock.com and (ii) on the SEC’s website at
http://www.sec.gov .

Item 8 – Portfolio Managers of Closed-End Management Investment Companies – as of October 31,
2010.

(a)(1) The registrant (or “Fund”) is managed by a team of investment professionals led by
John Burger, Managing Director at BlackRock, Inc. Mr. Burger is a member of
BlackRock, Inc.’s fixed income portfolio management group and is primarily
responsible for the day-to-day management of the registrant’s portfolio and the
selection of its investments. Mr. Burger has been a member of the registrant’s
portfolio management team since 2006.

 

(iv) Potential Material Conflicts of Interest

BlackRock, Inc. (individually and together with its affiliates, “BlackRock”) has built a
professional working environment, firm-wide compliance culture and compliance
procedures and systems designed to protect against potential incentives that may favor one
account over another. BlackRock has adopted policies and procedures that address the
allocation of investment opportunities, execution of portfolio transactions, personal trading
by employees and other potential conflicts of interest that are designed to ensure that all
client accounts are treated equitably over time. Nevertheless, BlackRock furnishes
investment management and advisory services to numerous clients in addition to the Fund,
and BlackRock may, consistent with applicable law, make investment recommendations to
other clients or accounts (including accounts which are hedge funds or have performance or
higher fees paid to BlackRock, or in which portfolio managers have a personal interest in
the receipt of such fees), which may be the same as or different from those made to the
Fund. In addition, BlackRock, its affiliates and significant shareholders and any officer,
director, stockholder or employee may or may not have an interest in the securities whose
purchase and sale BlackRock recommends to the Fund. BlackRock, or any of its affiliates
or significant shareholders, or any officer, director, stockholder, employee or any member
of their families may take different actions than those recommended to the Fund by
BlackRock with respect to the same securities. Moreover, BlackRock may refrain from

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rendering any advice or services concerning securities of companies of which any of
BlackRock’s (or its affiliates’ or significant shareholders’) officers, directors or employees
are directors or officers, or companies as to which BlackRock or any of its affiliates or
significant shareholders or the officers, directors and employees of any of them has any
substantial economic interest or possesses material non-public information. Each portfolio
manager also may manage accounts whose investment strategies may at times be opposed to
the strategy utilized for a fund. In this connection, it should be noted that a portfolio
manager may currently manage certain accounts that are subject to performance fees. In
addition, a portfolio manager may assist in managing certain hedge funds and may be
entitled to receive a portion of any incentive fees earned on such funds and a portion of such
incentive fees may be voluntarily or involuntarily deferred. Additional portfolio managers
may in the future manage other such accounts or funds and may be entitled to receive
incentive fees.

As a fiduciary, BlackRock owes a duty of loyalty to its clients and must treat each client
fairly. When BlackRock purchases or sells securities for more than one account, the trades
must be allocated in a manner consistent with its fiduciary duties. BlackRock attempts to
allocate investments in a fair and equitable manner among client accounts, with no account
receiving preferential treatment. To this end, BlackRock has adopted a policy that is
intended to ensure that investment opportunities are allocated fairly and equitably among
client accounts over time. This policy also seeks to achieve reasonable efficiency in client
transactions and provide BlackRock with sufficient flexibility to allocate investments in a
manner that is consistent with the particular investment discipline and client base.

(a)(3) As of October 31, 2010:

Portfolio Manager Compensation Overview

BlackRock’s financial arrangements with its portfolio managers, its competitive
compensation and its career path emphasis at all levels reflect the value senior management
places on key resources. Compensation may include a variety of components and may vary
from year to year based on a number of factors. The principal components of compensation
include a base salary, a performance-based discretionary bonus, participation in various
benefits programs and one or more of the incentive compensation programs established by
BlackRock such as its Long-Term Retention and Incentive Plan.

Base compensation. Generally, portfolio managers receive base compensation based on
their seniority and/or their position with the firm. Senior portfolio managers who perform
additional management functions within the portfolio management group or within
BlackRock may receive additional compensation for serving in these other capacities.

Discretionary Incentive Compensation
Discretionary incentive compensation is a function of several components: the performance
of BlackRock, Inc., the performance of the portfolio manager’s group within BlackRock,
the investment performance, including risk-adjusted returns, of the firm’s assets under
management or supervision by that portfolio manager relative to predetermined
benchmarks, and the individual’s seniority, role within the portfolio management team,
teamwork and contribution to the overall performance of these portfolios and BlackRock.
In most cases, including for the portfolio managers of the Fund, these benchmarks are the
same as the benchmark or benchmarks against which the performance of the Fund or other
accounts managed by the portfolio managers are measured. BlackRock’s Chief Investment

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Officers determine the benchmarks against which the performance of funds and other
accounts managed by each portfolio manager is compared and the period of time over which
performance is evaluated. With respect to the portfolio manager, such benchmarks include
a combination of Lipper Income and Preferred Stock Closed-end Funds classification.

BlackRock’s Chief Investment Officers make a subjective determination with respect to the
portfolio manager’s compensation based on the performance of the funds and other accounts
managed by each portfolio manager relative to the various benchmarks noted above.
Performance is measured on both a pre-tax and after-tax basis over various time periods
including 1, 3, 5 and 10-year periods, as applicable.

Distribution of Discretionary Incentive Compensation
Discretionary incentive compensation is distributed to portfolio managers in a combination
of cash and BlackRock, Inc. restricted stock units which vest ratably over a number of
years. The BlackRock, Inc. restricted stock units, if properly vested, will be settled in
BlackRock, Inc. common stock. Typically, the cash bonus, when combined with base
salary, represents more than 60% of total compensation for the portfolio managers. Paying
a portion of annual bonuses in stock puts compensation earned by a portfolio manager for a
given year “at risk” based on BlackRock’s ability to sustain and improve its performance
over future periods.

Long-Term Retention and Incentive Plan (“LTIP”) — From time to time long-
term incentive equity awards are granted to certain key employees to aid in retention, align
their interests with long-term shareholder interests and motivate performance. Equity
awards are generally granted in the form of BlackRock, Inc. restricted stock units that, once
vested, settle in BlackRock, Inc. common stock. Mr. Burger has received awards under the
LTIP.

Deferred Compensation Program — A portion of the compensation paid to
eligible BlackRock employees may be voluntarily deferred into an account that tracks the
performance of certain of the firm’s investment products. Each participant in the deferred
compensation program is permitted to allocate his deferred amounts among the various
investment options. Mr. Burger has participated in the deferred compensation program.

Other compensation benefits. In addition to base compensation and discretionary
incentive compensation, portfolio managers may be eligible to receive or participate in one
or more of the following:

Incentive Savings Plans — BlackRock, Inc. has created a variety of incentive
savings plans in which BlackRock employees are eligible to participate, including a
401(k) plan, the BlackRock Retirement Savings Plan (RSP), and the BlackRock Employee
Stock Purchase Plan (ESPP). The employer contribution components of the RSP include a
company match equal to 50% of the first 6% of eligible pay contributed to the plan capped
at $4,000 per year, and a company retirement contribution equal to 3-5% of eligible
compensation. The RSP offers a range of investment options, including registered
investment companies managed by the firm. BlackRock contributions follow the investment
direction set by participants for their own contributions or, absent employee investment
direction, are invested into a balanced portfolio. The ESPP allows for investment in
BlackRock common stock at a 5% discount on the fair market value of the stock on the
purchase date. Annual participation in the ESPP is limited to the purchase of 1,000 shares
or a dollar value of $25,000. Each portfolio manager is eligible to participate in these plans.

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(a)(4) Beneficial Ownership of Securities – As of October 31, 2010.

 

(b) Not Applicable

Item 9 – Purchases of Equity Securities by Closed-End Management Investment Company and
Affiliated Purchasers – Not Applicable due to no such purchases during the period covered
by this report.

Item 10 – Submission of Matters to a Vote of Security Holders – On October 25, 2010, the Board of
Trustees of the Fund amended and restated in its entirety the bylaws of the Fund (the
"Amended and Restated Bylaws"). The Amended and Restated Bylaws were deemed
effective as of October 28, 2010 and set forth, among other things, the processes and
procedures that shareholders of the Fund must follow, and specifies additional information
that shareholders of the Fund must provide, when proposing trustee nominations at any
annual meeting or special meeting in lieu of an annual meeting or other business to be
considered at an annual meeting or special meeting.

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 13a-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 – See Item 2

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

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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.

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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 (principal executive officer) of
BlackRock Credit Allocation Income Trust IV

Date: January 5, 2011

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: January 5, 2011

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

Date: January 5, 2011

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