WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MSDW HIGH YIELD SECURITIES CLASS B
</LEGEND>
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> AUG-31-2000
<PERIOD-END> AUG-31-2000
<INVESTMENTS-AT-COST> 2,669,703,149
<INVESTMENTS-AT-VALUE> 1,725,014,813
<RECEIVABLES> 54,643,616
<ASSETS-OTHER> 138,952
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1,779,797,381
<PAYABLE-FOR-SECURITIES> (1,573,028)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (6,051,356)
<TOTAL-LIABILITIES> (7,624,384)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 3,175,159,265
<SHARES-COMMON-STOCK> 318,378,888
<SHARES-COMMON-PRIOR> 350,377,934
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (2,808,348)
<ACCUMULATED-NET-GAINS> (455,489,584)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (944,688,336)
<NET-ASSETS> 1,381,008,060
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 306,202,922
<OTHER-INCOME> 0
<EXPENSES-NET> (24,153,470)
<NET-INVESTMENT-INCOME> 282,049,452
<REALIZED-GAINS-CURRENT> (16,496,280)
<APPREC-INCREASE-CURRENT> (457,477,753)
<NET-CHANGE-FROM-OPS> (191,924,581)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (229,455,500)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 83,309,893
<NUMBER-OF-SHARES-REDEEMED> (131,901,232)
<SHARES-REINVESTED> 16,592,293
<NET-CHANGE-IN-ASSETS> (666,536,668)
<ACCUMULATED-NII-PRIOR> 10,091,362
<ACCUMULATED-GAINS-PRIOR> (621,194,377)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (8,439,728)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (24,153,470)
<AVERAGE-NET-ASSETS> 1,676,607,713
<PER-SHARE-NAV-BEGIN> 5.50
<PER-SHARE-NII> 0.66
<PER-SHARE-GAIN-APPREC> (1.13)
<PER-SHARE-DIVIDEND> (0.69)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 4.34
<EXPENSE-RATIO> 1.25
</TABLE>
