<PAGE> PAGE 1
000 A000000 12/31/1999
000 C000000 0000351895
000 D000000 N
000 E000000 NF
000 F000000 Y
000 G000000 N
000 H000000 N
000 I000000 6.1
000 J000000 A
001 A000000 ACTIVE ASSETS MONEY TRUST
001 B000000 811-3159
001 C000000 2123922550
002 A000000 TWO WORLD TRADE CENTER
002 B000000 NEW YORK
002 C000000 NY
002 D010000 10048
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 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B000001 A
008 C000001 801-42061
008 D010001 NEW YORK
008 D020001 NY
008 D030001 10048
011 A000001 MORGAN STANLEY DEAN WITTER DISTRIBUTORS INC.
011 B000001 8-45262
011 C010001 NEW YORK
011 C020001 NY
011 C030001 10048
012 A000001 MORGAN STANLEY DEAN WITTER TRUST FSB
012 B000001 84-1785
012 C010001 JERSEY CITY
012 C020001 NJ
012 C030001 07311
013 A000001 PRICEWATERHOUSECOOPERS LLP
013 B010001 NEW YORK
013 B020001 NY
<PAGE> PAGE 2
013 B030001 10036
014 A000001 DEAN WITTER REYNOLDS INC.
014 B000001 8-14172
014 A000002 MORGAN STANLEY & CO. INCORPORATED
014 B000002 8-15869
015 A000001 THE BANK OF NEW YORK
015 B000001 C
015 C010001 NEW YORK
015 C020001 NY
015 C030001 10025
015 E010001 X
018 000000 Y
019 A000000 Y
019 B000000 130
019 C000000 MSDW-FUNDS
020 C000001 0
020 C000002 0
020 C000003 0
020 C000004 0
020 C000005 0
020 C000006 0
020 C000007 0
020 C000008 0
020 C000009 0
020 C000010 0
021 000000 0
022 A000001 GOLDMAN SACHS & CO.
022 B000001 13-5108880
022 C000001 3858363
022 D000001 0
022 A000002 MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
022 B000002 13-5674085
022 C000002 2941852
022 D000002 0
022 A000003 AMERICAN EXPRESS CREDIT CORPORATION
022 B000003 11-1988350
022 C000003 1874760
022 D000003 0
022 A000004 MORGAN (J.P.) SECURITIES INC.
022 B000004 13-3224016
022 C000004 1770294
022 D000004 0
022 A000005 BANC OF AMERICA SECURITIES LLC.
022 B000005 56-2058405
022 C000005 1577349
022 D000005 0
022 A000006 DAIMLER CHRYSLER
022 B000006 22-1760935
022 C000006 1459023
022 D000006 0
022 A000007 GENERAL MOTORS ACCEPTANCE CORP.
<PAGE> PAGE 3
022 B000007 38-0572512
022 C000007 1414526
022 D000007 0
022 A000008 DEUTSCHE BANK SECURITIES CORP.
022 B000008 13-2730828
022 C000008 1382381
022 D000008 0
022 A000009 SALOMON SMITH BARNEY INC.
022 B000009 13-1912900
022 C000009 1309633
022 D000009 0
022 A000010 FORD FINANCIAL SERVICES INC.
022 B000010 38-1612444
022 C000010 1296971
022 D000010 0
023 C000000 33306555
023 D000000 0
024 000000 Y
025 A000001 MORGAN (J.P.) SECURITIES INC.
025 B000001 13-3224016
025 C000001 D
025 D000001 802171
025 A000002 GENERAL MOTORS ACCEPTANCE CORPORATION
025 B000002 38-0572512
025 C000002 D
025 D000002 249552
025 A000003 AMERICAN EXPRESS CREDIT CORPORATION
025 B000003 11-1988350
025 C000003 D
025 D000003 866873
025 A000004 DEUTSCHE BANK FINANCIAL INC.
025 B000004 13-2730828
025 C000004 D
025 D000004 833015
025 A000005 GOLDMAN SACHS GROUP INC.
025 B000005 13-5108880
025 C000005 D
025 D000005 902580
025 D000006 0
025 D000007 0
025 D000008 0
026 A000000 N
026 B000000 Y
026 C000000 N
026 D000000 Y
026 E000000 N
026 F000000 N
026 G010000 N
026 G020000 N
026 H000000 N
027 000000 Y
<PAGE> PAGE 4
028 A010000 5217591
028 A020000 59515
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028 A040000 4533035
028 B010000 5020062
028 B020000 70057
028 B030000 0
028 B040000 4883436
028 C010000 4959591
028 C020000 69313
028 C030000 0
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028 D020000 69373
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028 F040000 8420293
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<PAGE> PAGE 5
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<PAGE> PAGE 6
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070 D020000 N
070 E010000 N
070 E020000 N
070 F010000 N
070 F020000 N
070 G010000 N
070 G020000 N
070 H010000 N
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<PAGE> PAGE 7
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
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070 O010000 Y
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070 Q020000 N
070 R010000 N
070 R020000 N
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072 S000000 21
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<PAGE> PAGE 8
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073 A020000 0.0000
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074 F000000 0
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074 L000000 23805
074 M000000 676
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074 R030000 0
074 R040000 997
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077 A000000 Y
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077 D000000 N
077 E000000 N
077 F000000 N
077 G000000 N
077 H000000 N
<PAGE> PAGE 9
077 I000000 N
077 J000000 N
077 K000000 N
077 L000000 N
077 M000000 N
077 N000000 N
077 O000000 N
077 P000000 Y
077 Q010000 N
077 Q020000 N
077 Q030000 N
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
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086 C020000 0
086 D010000 0
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086 E020000 0
086 F010000 0
086 F020000 0
SIGNATURE BARRY FINK
TITLE VICE PRESIDENT
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MSDW ACTIVE ASSETS MONEY TRUST
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JUN-30-2000
<PERIOD-END> DEC-31-1999
<INVESTMENTS-AT-COST> 18,138,197,038
<INVESTMENTS-AT-VALUE> 18,138,197,038
<RECEIVABLES> 23,804,624
<ASSETS-OTHER> 702,256
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 18,162,703,918
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (6,904,136)
<TOTAL-LIABILITIES> (6,904,136)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 18,155,792,380
<SHARES-COMMON-STOCK> 18,155,792,380
<SHARES-COMMON-PRIOR> 15,989,367,901
<ACCUMULATED-NII-CURRENT> 7,402
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 18,155,799,782
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 475,717,768
<OTHER-INCOME> 0
<EXPENSES-NET> (36,659,594)
<NET-INVESTMENT-INCOME> 439,058,174
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 439,058,174
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (439,065,504)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 35,009,985,003
<NUMBER-OF-SHARES-REDEEMED> (33,281,683,216)
<SHARES-REINVESTED> 438,122,692
<NET-CHANGE-IN-ASSETS> 2,166,417,149
<ACCUMULATED-NII-PRIOR> 14,732
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (23,544,685)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (36,659,594)
<AVERAGE-NET-ASSETS> 17,444,320,907
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.025
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> 0
<PER-SHARE-DISTRIBUTIONS> (0.025)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.42
</TABLE>
EXHIBIT
Active Assets Money Trust
Sub-Item
77P Information Required to be Filed Pursuant to
Existing
Exemptive (c) Orders
(A) Statement Pursuant to Exemptive Order (ICA Release
No. 11803)
Pertaining to Amortized Cost Pricing
No action was taken during the period pursuant to
condition 2 (c) of the above-captioned Order.
