<PAGE> PAGE 1
000 A000000 09/30/1999
000 C000000 0000869311
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 CMA TREASURY FUND
001 B000000 811-6196
001 C000000 6092822800
002 A000000 P.O. BOX 9011
002 B000000 PRINCETON
002 C000000 NJ
002 D010000 08543
002 D020000 9011
003 000000 N
004 000000 N
005 000000 N
006 000000 N
007 A000000 N
007 B000000 0
007 C010100 1
007 C010200 2
007 C010300 3
007 C010400 4
007 C010500 5
007 C010600 6
007 C010700 7
007 C010800 8
007 C010900 9
007 C011000 10
008 A000001 FUND ASSET MANAGEMENT, L.P.
008 B000001 A
008 C000001 801-12485
008 D010001 PRINCETON
008 D020001 NJ
008 D030001 08543
008 D040001 9011
011 A000001 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
011 B000001 8-7221
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10281
011 C040001 1201
012 A000001 FINANCIAL DATA SERVICES, INC.
012 B000001 84-01339
012 C010001 JACKSONVILLE
012 C020001 FL
012 C030001 32246
<PAGE> PAGE 2
012 C040001 6484
013 A000001 DELOITTE & TOUCHE LLP
013 B010001 PRINCETON
013 B020001 NJ
013 B030001 08540
014 A000001 MLPF&S AND OTHER ML BROKER/DEALER AFFILIATES
014 B000001 8-7221
015 A000001 STATE STREET BANK AND TRUST COMPANY
015 B000001 C
015 C010001 BOSTON
015 C020001 MA
015 C030001 02101
015 E010001 X
015 A000002 THE BANK OF NEW YORK
015 B000002 S
015 C010002 NEW YORK
015 C020002 NY
015 C030002 10286
015 E010002 X
015 A000003 BANKERS TRUST COMPANY
015 B000003 S
015 C010003 NEW YORK
015 C020003 NY
015 C030003 10006
015 E010003 X
015 A000004 THE CHASE MANHATTAN BANK
015 B000004 S
015 C010004 NEW YORK
015 C020004 NY
015 C030004 10017
015 E010004 X
015 A000005 CUSTODIAL TRUST CO.
015 B000005 S
015 C010005 NEW YORK
015 C020005 NY
015 C030005 10167
015 E010005 X
015 A000006 MORGAN GUARANTY TRUST CO. OF NEW YORK
015 B000006 S
015 C010006 NEW YORK
015 C020006 NY
015 C030006 10260
015 E010006 X
018 000000 Y
019 A000000 Y
019 B000000 228
019 C000000 MERRILLLYN
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
<PAGE> PAGE 3
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 DONALDSON, LUFKIN & JENRETTE SECURITIES CORP.
022 B000001 13-2741729
022 C000001 1388789
022 D000001 509360
022 A000002 DEUTSCHE BANK SECURITIES INC.
022 B000002 13-2730828
022 C000002 1209665
022 D000002 184203
022 A000003 CLARKE (G.X.) & CO.
022 B000003 13-2969143
022 C000003 685276
022 D000003 535759
022 A000004 HSBC SECURITIES (U.S.A.) INC.
022 B000004 13-2650272
022 C000004 883362
022 D000004 248445
022 A000005 LANSTON (AUBREY G.) & CO. INC.
022 B000005 13-5552129
022 C000005 416608
022 D000005 284684
022 A000006 CREDIT SUISSE FIRST BOSTON CORPORATION
022 B000006 13-5659485
022 C000006 322362
022 D000006 202610
022 A000007 PAINEWEBBER INCORPORATED
022 B000007 13-2638166
022 C000007 105930
022 D000007 21209
022 A000008 BARCLAY INVESTMENTS, INC.
022 B000008 05-0346412
022 C000008 126779
022 D000008 0
022 A000009 MORGAN (J.P.) SECURITIES INC.
022 B000009 13-3224016
022 C000009 19436
022 D000009 97948
022 A000010 NATIONSBANC INVESTMENTS, INC.
022 C000010 100355
022 D000010 0
023 C000000 5329055
023 D000000 2272709
024 000000 N
026 A000000 N
026 B000000 Y
<PAGE> PAGE 4
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
028 A010000 1088226
028 A020000 8322
028 A030000 0
028 A040000 1131014
028 B010000 544486
028 B020000 7116
028 B030000 0
028 B040000 685359
028 C010000 606689
028 C020000 8313
028 C030000 0
028 C040000 653916
028 D010000 745155
028 D020000 7906
028 D030000 0
028 D040000 678165
028 E010000 674561
028 E020000 8648
028 E030000 0
028 E040000 663744
028 F010000 582253
028 F020000 8398
028 F030000 0
028 F040000 706929
028 G010000 4241370
028 G020000 48703
028 G030000 0
028 G040000 4519127
028 H000000 0
029 000000 N
030 A000000 0
030 B000000 0.00
030 C000000 0.00
034 000000 N
035 000000 0
036 B000000 0
037 000000 N
038 000000 0
039 000000 N
040 000000 Y
041 000000 Y
042 A000000 0
042 B000000 0
<PAGE> PAGE 5
042 C000000 100
042 D000000 0
042 E000000 0
042 F000000 0
042 G000000 0
042 H000000 0
043 000000 1476
044 000000 0
045 000000 Y
046 000000 N
047 000000 Y
048 000000 0.000
048 A010000 500000
048 A020000 0.500
048 B010000 500000
048 B020000 0.425
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 1000000
048 K020000 0.375
049 000000 N
050 000000 N
051 000000 N
052 000000 N
053 A000000 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
<PAGE> PAGE 6
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 Y
060 B000000 Y
061 000000 1
062 A000000 Y
062 B000000 99.1
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 0.0
062 L000000 0.0
062 M000000 0.0
062 N000000 0.0
062 O000000 0.0
062 P000000 0.0
062 Q000000 0.0
062 R000000 0.0
063 A000000 77
063 B000000 0.0
064 A000000 N
066 A000000 N
067 000000 N
068 A000000 N
068 B000000 N
069 000000 N
070 A010000 N
070 A020000 N
070 B010000 N
070 B020000 N
070 C010000 N
070 C020000 N
070 D010000 N
070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
<PAGE> PAGE 7
070 H010000 N
070 H020000 N
070 I010000 N
070 I020000 N
070 J010000 N
070 J020000 N
070 K010000 N
070 K020000 N
070 L010000 N
070 L020000 N
070 M010000 N
070 M020000 N
070 N010000 N
070 N020000 N
070 O010000 Y
070 O020000 N
070 P010000 Y
070 P020000 N
070 Q010000 N
070 Q020000 N
070 R010000 N
070 R020000 N
071 A000000 0
071 B000000 0
071 C000000 0
071 D000000 0
072 A000000 6
072 B000000 55452
072 C000000 0
072 D000000 0
072 E000000 0
072 F000000 4925
072 G000000 88
072 H000000 0
072 I000000 211
072 J000000 54
072 K000000 0
072 L000000 17
072 M000000 16
072 N000000 30
072 O000000 0
072 P000000 0
072 Q000000 0
072 R000000 19
072 S000000 17
072 T000000 1476
072 U000000 0
072 V000000 0
072 W000000 23
072 X000000 6876
072 Y000000 0
<PAGE> PAGE 8
072 Z000000 48576
072AA000000 210
072BB000000 47
072CC010000 867
072CC020000 0
072DD010000 48576
072DD020000 0
072EE000000 163
073 A010000 0.0204
073 A020000 0.0000
073 B000000 0.0001
073 C000000 0.0000
074 A000000 0
074 B000000 0
074 C000000 2207917
074 D000000 0
074 E000000 0
074 F000000 0
074 G000000 0
074 H000000 0
074 I000000 0
074 J000000 0
074 K000000 0
074 L000000 19966
074 M000000 129
074 N000000 2228012
074 O000000 0
074 P000000 760
074 Q000000 0
074 R010000 0
074 R020000 0
074 R030000 0
074 R040000 313
074 S000000 0
074 T000000 2226939
074 U010000 2226359
074 U020000 0
074 V010000 1.00
074 V020000 0.00
074 W000000 1.0003
074 X000000 27581
074 Y000000 0
075 A000000 2386100
075 B000000 0
076 000000 0.00
077 A000000 N
078 000000 N
SIGNATURE DONALD C. BURKE
TITLE TREASURER
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000869311
<NAME> CMA TREASURY FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2000
<PERIOD-START> APR-01-1999
<PERIOD-END> SEP-30-1999
<INVESTMENTS-AT-COST> 2207336829
<INVESTMENTS-AT-VALUE> 2207916716
<RECEIVABLES> 19966251
<ASSETS-OTHER> 129272
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2228012239
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1073457
<TOTAL-LIABILITIES> 1073457
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2226358895
<SHARES-COMMON-STOCK> 2226358895
<SHARES-COMMON-PRIOR> 2455413076
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 579887
<NET-ASSETS> 2226938782
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 55451487
<OTHER-INCOME> 0
<EXPENSES-NET> (6875673)
<NET-INVESTMENT-INCOME> 48575814
<REALIZED-GAINS-CURRENT> 163468
<APPREC-INCREASE-CURRENT> 866709
<NET-CHANGE-FROM-OPS> 49605991
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (48575814)
<DISTRIBUTIONS-OF-GAINS> (163468)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 4241370110
<NUMBER-OF-SHARES-REDEEMED> (4519127024)
<SHARES-REINVESTED> 48702733
<NET-CHANGE-IN-ASSETS> (228187472)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 4924893
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 6875673
<AVERAGE-NET-ASSETS> 2386099661
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> .02
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (.02)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> .57
</TABLE>
