WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MSDW Growth Fund
Class B
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 982,888,439
<INVESTMENTS-AT-VALUE> 1,397,301,867
<RECEIVABLES> 28,865,427
<ASSETS-OTHER> 178,098
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,426,345,392
<PAYABLE-FOR-SECURITIES> (11,139,546)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (2,346,602)
<TOTAL-LIABILITIES> (13,486,148)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 942,199,163
<SHARES-COMMON-STOCK> 70,062,995
<SHARES-COMMON-PRIOR> 60,207,487
<ACCUMULATED-NII-CURRENT> (5,030,017)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 61,276,670
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 414,413,428
<NET-ASSETS> 1,323,257,407
<DIVIDEND-INCOME> 4,153,295
<INTEREST-INCOME> 947,210
<OTHER-INCOME> 0
<EXPENSES-NET> (10,130,522)
<NET-INVESTMENT-INCOME> (5,030,017)
<REALIZED-GAINS-CURRENT> 63,097,888
<APPREC-INCREASE-CURRENT> (135,767,313)
<NET-CHANGE-FROM-OPS> (77,699,442)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> (119,496,418)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 9,257,701
<NUMBER-OF-SHARES-REDEEMED> (5,263,811)
<SHARES-REINVESTED> 5,861,618
<NET-CHANGE-IN-ASSETS> 46,515,876
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 122,536,248
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (5,285,521)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (10,130,522)
<AVERAGE-NET-ASSETS> 1,296,841,896
<PER-SHARE-NAV-BEGIN> 22.04
<PER-SHARE-NII> (0.07)
<PER-SHARE-GAIN-APPREC> (1.11)
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> (1.97)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 18.89
<EXPENSE-RATIO> 1.50
</TABLE>
