<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MORGAN STANLEY DEAN WITTER DIVERSIFIED INCOME TRUST - CLASS D
</LEGEND>
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 858,928,722
<INVESTMENTS-AT-VALUE> 692,526,047
<RECEIVABLES> 17,725,646
<ASSETS-OTHER> 25,164,473
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 735,416,166
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (2,721,924)
<TOTAL-LIABILITIES> (2,721,924)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 940,099,061
<SHARES-COMMON-STOCK> 191,987
<SHARES-COMMON-PRIOR> 128,252
<ACCUMULATED-NII-CURRENT> (922,508)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (43,503,180)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (162,979,131)
<NET-ASSETS> 1,488,115
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 40,179,886
<OTHER-INCOME> 0
<EXPENSES-NET> (5,602,276)
<NET-INVESTMENT-INCOME> 34,577,610
<REALIZED-GAINS-CURRENT> (19,072,577)
<APPREC-INCREASE-CURRENT> (24,765,198)
<NET-CHANGE-FROM-OPS> (9,260,165)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (140,959)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 6,221,848
<NUMBER-OF-SHARES-REDEEMED> (6,166,228)
<SHARES-REINVESTED> 8,115
<NET-CHANGE-IN-ASSETS> (169,183,410)
<ACCUMULATED-NII-PRIOR> (2,194,141)
<ACCUMULATED-GAINS-PRIOR> (24,430,603)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (1,639,529)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (5,602,276)
<AVERAGE-NET-ASSETS> 2,807,778
<PER-SHARE-NAV-BEGIN> 8.15
<PER-SHARE-NII> 0.37
<PER-SHARE-GAIN-APPREC> (0.41)
<PER-SHARE-DIVIDEND> (0.36)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 7.75
<EXPENSE-RATIO> 0.54
</TABLE>
