WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MSDW VARIABLE INVESTMENT SERIES MONEYX
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 387,502,037
<INVESTMENTS-AT-VALUE> 387,502,037
<RECEIVABLES> 1,145,466
<ASSETS-OTHER> 994
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 388,648,497
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (1,727,397)
<TOTAL-LIABILITIES> (1,727,397)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 386,920,154
<SHARES-COMMON-STOCK> 386,117,576
<SHARES-COMMON-PRIOR> 435,642,922
<ACCUMULATED-NII-CURRENT> 270
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 676
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 386,921,100
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 12,332,683
<OTHER-INCOME> 0
<EXPENSES-NET> (1,040,113)
<NET-INVESTMENT-INCOME> 11,292,570
<REALIZED-GAINS-CURRENT> 1,580
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 11,294,150
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (11,290,475)
<DISTRIBUTIONS-OF-GAINS> (904)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 484,053,373
<NUMBER-OF-SHARES-REDEEMED> (544,870,098)
<SHARES-REINVESTED> 11,291,379
<NET-CHANGE-IN-ASSETS> (48,722,768)
<ACCUMULATED-NII-PRIOR> 189
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (1,007,817)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (1,040,113)
<AVERAGE-NET-ASSETS> 405,272,324
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.03
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (0.03)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.52
</TABLE>
