000 A000000 04/30/2012
000 C000000 0001379384
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 BLK CREDIT ALLOCATION INCOME TRUST IV
001 B000000 811-21972
001 C000000 8004417762
002 A000000 100 BELLEVUE PARKWAY
002 B000000 WILMINGTON
002 C000000 DE
002 D010000 19809
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
008 A000001 BLACKROCK ADVISORS, LLC
008 B000001 A
008 C000001 801-47710
008 D010001 WILMINGTON
008 D020001 DE
008 D030001 19809
008 A000002 BLACKROCK FINANCIAL MANAGEMENT, INC.
008 B000002 S
008 C000002 801-48433
008 D010002 NEW YORK
008 D020002 NY
008 D030002 10022
012 A000001 COMPUTERSHARE TRUST COMPANY, N.A. (COMMON)
012 B000001 85-11340
012 C010001 CANTON
012 C020001 MA
012 C030001 02021
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 BOSTON
013 B020001 MA
013 B030001 02116
014 A000001 BLACKROCK CAPITAL MARKETS, LLC
014 B000001 8-67827
014 A000002 BLACKROCK EXECUTION SERVICES
014 B000002 8-48719
014 A000003 BLACKROCK INVESTMENTS, LLC
014 B000003 8-48436
014 A000004 HARRIS WILLIAMS LLC

014 B000004 8-53380
014 A000005 PNC CAPITAL MARKETS, INC.
014 B000005 8-32493
014 A000006 PNC INVESTMENTS LLC
014 B000006 8-66195
015 A000001 STATE STREET BANK & TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02110
015 E010001 X
015 A000002 THE BANK OF NEW YORK MELLON
015 B000002 S
015 C010002 NEW YORK
015 C020002 NY
015 C030002 10286
015 E010002 X
015 A000003 J.P. MORGAN CHASE BANK
015 B000003 S
015 C010003 NEW YORK
015 C020003 NY
015 C030003 10017
015 E010003 X
015 A000004 CLEARSTREAM BANKING
015 B000004 S
015 C010004 LUXEMBOURG
015 D010004 LUXEMBOURG
015 E040004 X
018 000000 Y
019 A000000 Y
019 B000000 291
019 C000000 BLKRKADVSR
020 A000001 BANK OF AMERICA CORP
020 B000001 56-0906609
020 C000001 16
020 A000002 DEUTSCHE BANK AG
020 B000002 13-294498
020 C000002 4
020 A000003 GOLDMAN SACHS & CO
020 B000003 13-5108880
020 C000003 2
020 A000004 JANNEY MONTGOMERY SCOTT LLC
020 B000004 23-0731260
020 C000004 0
021 000000 22
022 A000001 UBS SECURITIES LLC
022 B000001 13-3873456
022 C000001 545745
022 D000001 528892
022 A000002 BARCLAYS CAPITAL INC.
022 B000002 13-3297824

022 C000002 221593
022 D000002 214393
022 A000003 CREDIT SUISSE SECURITIES (USA) L.L.C.
022 B000003 13-5659485
022 C000003 201197
022 D000003 196701
022 A000004 BLK LIQUIDITY FUNDS, TEMPFUND, INST. CLASS
022 B000004 52-0983343
022 C000004 130725
022 D000004 132239
022 A000005 BNP PARIBAS SECURITIES CORP.
022 B000005 13-3235334
022 C000005 102685
022 D000005 102827
022 A000006 DEUTSCHE BANK SECURITIES INC.
022 B000006 13-2730828
022 C000006 84545
022 D000006 72812
022 A000007 BANK OF AMERICA CORP
022 B000007 56-0906609
022 C000007 41603
022 D000007 49305
022 A000008 J.P. MORGAN SECURITIES INC.
022 B000008 13-3299429
022 C000008 45213
022 D000008 33824
022 A000009 MORGAN STANLEY & CO. INCORPORATED
022 B000009 13-2655998
022 C000009 28336
022 D000009 19158
022 A000010 GOLDMAN, SACHS + CO
022 B000010 13-5108880
022 C000010 16606
022 D000010 24215
023 C000000 1451891
023 D000000 1412958
024 000000 Y
025 A000001 MORGAN STANLEY & CO INC
025 B000001 13-2655998
025 C000001 D
025 D000001 5504
025 A000002 GOLDMAN SACHS & CO
025 B000002 13-5108880
025 C000002 D
025 D000002 16367
025 A000003 JPMORGAN CHASE & CO
025 B000003 13-3299429
025 C000003 D
025 D000003 24849
025 A000004 BANK OF AMERICA CORP
025 B000004 56-0906609

025 C000004 D
025 D000004 21670
025 A000005 BARCLAYS CAPITAL INC.
025 B000005 13-3297824
025 C000005 D
025 D000005 1100
025 A000006 UBS SECURITIES LLC
025 B000006 13-3873456
025 C000006 D
025 D000006 4357
025 A000007 STATE STREET BANK AND TRUST COMPANY
025 B000007 04-1867445
025 C000007 D
025 D000007 22729
025 A000008 BNP PARIBAS SECURITIES CORP.
025 B000008 13-3235334
025 C000008 D
025 D000008 2150
026 A000000 N
026 B000000 N
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 N
028 A010000 0
028 A020000 0
028 A030000 0
028 A040000 0
028 B010000 0
028 B020000 0
028 B030000 0
028 B040000 0
028 C010000 0
028 C020000 0
028 C030000 0
028 C040000 0
028 D010000 0
028 D020000 0
028 D030000 0
028 D040000 0
028 E010000 0
028 E020000 0
028 E030000 0
028 E040000 0
028 F010000 0
028 F020000 0
028 F030000 0

028 F040000 0
028 G010000 0
028 G020000 0
028 G030000 0
028 G040000 0
028 H000000 0
030 A000000 0
030 B000000 0.00
030 C000000 0.00
031 A000000 0
031 B000000 0
032 000000 0
033 000000 0
035 000000 0
036 B000000 0
038 000000 0
042 A000000 0
042 B000000 0
042 C000000 0
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 0
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.650
048 A010000 0
048 A020000 0.000
048 B010000 0
048 B020000 0.000
048 C010000 0
048 C020000 0.000
048 D010000 0
048 D020000 0.000
048 E010000 0
048 E020000 0.000
048 F010000 0
048 F020000 0.000
048 G010000 0
048 G020000 0.000
048 H010000 0
048 H020000 0.000
048 I010000 0
048 I020000 0.000
048 J010000 0
048 J020000 0.000
048 K010000 0

048 K020000 0.000
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 Y
053 B000000 Y
053 C000000 N
054 A000000 Y
054 B000000 Y
054 C000000 N
054 D000000 N
054 E000000 N
054 F000000 N
054 G000000 N
054 H000000 Y
054 I000000 N
054 J000000 Y
054 K000000 N
054 L000000 N
054 M000000 Y
054 N000000 N
055 A000000 N
055 B000000 N
056 000000 Y
057 000000 N
058 A000000 N
059 000000 Y
060 A000000 N
060 B000000 N
061 000000 0
062 A000000 Y
062 B000000 0.0
062 C000000 0.0
062 D000000 0.0
062 E000000 0.0
062 F000000 0.0
062 G000000 0.0
062 H000000 0.0
062 I000000 0.0
062 J000000 0.0
062 K000000 -0.3
062 L000000 0.0
062 M000000 2.3
062 N000000 0.3
062 O000000 0.0
062 P000000 105.0
062 Q000000 24.9
062 R000000 3.5
063 A000000 0
063 B000000 23.0

064 A000000 N
064 B000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 Y
070 A020000 N
070 B010000 Y
070 B020000 N
070 C010000 Y
070 C020000 N
070 D010000 Y
070 D020000 Y
070 E010000 Y
070 E020000 Y
070 F010000 Y
070 F020000 N
070 G010000 Y
070 G020000 N
070 H010000 Y
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 Y
070 J020000 N
070 K010000 Y
070 K020000 Y
070 L010000 Y
070 L020000 N
070 M010000 Y
070 M020000 N
070 N010000 Y
070 N020000 N
070 O010000 Y
070 O020000 Y
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 Y
070 R020000 N
071 A000000 199108
071 B000000 248916
071 C000000 1013992
071 D000000 20
072 A000000 6
072 B000000 27650
072 C000000 1092
072 D000000 0

072 E000000 9
072 F000000 3319
072 G000000 62
072 H000000 0
072 I000000 6
072 J000000 34
072 K000000 0
072 L000000 70
072 M000000 25
072 N000000 9
072 O000000 0
072 P000000 461
072 Q000000 0
072 R000000 28
072 S000000 63
072 T000000 0
072 U000000 0
072 V000000 0
072 W000000 38
072 X000000 4115
072 Y000000 2
072 Z000000 24638
072AA000000 6690
072BB000000 0
072CC010000 18957
072CC020000 0
072DD010000 24307
072DD020000 0
072EE000000 0
073 A010000 0.4690
073 A020000 0.0000
073 B000000 0.0000
073 C000000 0.0000
074 A000000 6987
074 B000000 0
074 C000000 0
074 D000000 991782
074 E000000 23671
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 4305
074 J000000 705
074 K000000 0
074 L000000 14987
074 M000000 229
074 N000000 1042666
074 O000000 2156
074 P000000 549
074 Q000000 0
074 R010000 282005

074 R020000 0
074 R030000 3767
074 R040000 5873
074 S000000 0
074 T000000 748316
074 U010000 51828
074 U020000 0
074 V010000 14.44
074 V020000 0.00
074 W000000 0.0000
074 X000000 41875
074 Y000000 208685
075 A000000 0
075 B000000 726099
076 000000 13.26
077 A000000 Y
077 E000000 Y
078 000000 N
080 C000000 0
081 B000000 0
082 B000000 0
083 B000000 0
084 B000000 0
086 A010000 0
086 A020000 0
086 B010000 0
086 B020000 0
086 C010000 0
086 C020000 0
086 D010000 0
086 D020000 0
086 E010000 0
086 E020000 0
086 F010000 0
086 F020000 0
087 A010000 COMMON STOCK
087 A020000 092508100
087 A030000 BTZ
088 A000000 N
088 B000000 N
088 C000000 N
088 D000000 N
SIGNATURE NEAL J. ANDREWS
TITLE CFO

BlackRock Credit Allocat... (NYSE:BTZ)
Historical Stock Chart
From Jun 2024 to Jul 2024 Click Here for more BlackRock Credit Allocat... Charts.
BlackRock Credit Allocat... (NYSE:BTZ)
Historical Stock Chart
From Jul 2023 to Jul 2024 Click Here for more BlackRock Credit Allocat... Charts.