<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MSDW NEW YORK MUNICIPAL MONEY MARKET TRUST
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 67,422,860
<INVESTMENTS-AT-VALUE> 67,422,860
<RECEIVABLES> 310,912
<ASSETS-OTHER> 18,357
<OTHER-ITEMS-ASSETS> 83,483
<TOTAL-ASSETS> 67,835,612
<PAYABLE-FOR-SECURITIES> (1,507,860)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (1,281,644)
<TOTAL-LIABILITIES> (2,789,504)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 65,046,047
<SHARES-COMMON-STOCK> 65,046,047
<SHARES-COMMON-PRIOR> 62,008,643
<ACCUMULATED-NII-CURRENT> 61
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 0
<OVERDISTRIBUTION-GAINS> 0
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<NET-ASSETS> 65,046,108
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 1,280,069
<OTHER-INCOME> 0
<EXPENSES-NET> (289,762)
<NET-INVESTMENT-INCOME> 990,307
<REALIZED-GAINS-CURRENT> 0
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 0
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (990,257)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 96,547,458
<NUMBER-OF-SHARES-REDEEMED> (94,500,311)
<SHARES-REINVESTED> 990,257
<NET-CHANGE-IN-ASSETS> 3,037,454
<ACCUMULATED-NII-PRIOR> 11
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (169,655)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (292,544)
<AVERAGE-NET-ASSETS> 68,234,943
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.015
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (0.015)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.86
</TABLE>
