<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
MSDW Insured Municipal Securities
</LEGEND>
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> OCT-31-2000
<INVESTMENTS-AT-COST> 116,574,173
<INVESTMENTS-AT-VALUE> 122,472,967
<RECEIVABLES> 2,385,232
<ASSETS-OTHER> 93,764
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 124,951,963
<PAYABLE-FOR-SECURITIES> (946,427)
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> (123,388)
<TOTAL-LIABILITIES> (1,069,815)
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 117,281,294
<SHARES-COMMON-STOCK> 8,171,215
<SHARES-COMMON-PRIOR> 8,650,213
<ACCUMULATED-NII-CURRENT> 609,230
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 92,830
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 5,898,794
<NET-ASSETS> 123,882,148
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 7,146,818
<OTHER-INCOME> 0
<EXPENSES-NET> (591,210)
<NET-INVESTMENT-INCOME> 6,555,608
<REALIZED-GAINS-CURRENT> 223,697
<APPREC-INCREASE-CURRENT> 3,635,800
<NET-CHANGE-FROM-OPS> 10,415,105
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (6,616,800)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> (478,998)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (2,398,838)
<ACCUMULATED-NII-PRIOR> 670,422
<ACCUMULATED-GAINS-PRIOR> (130,867)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> (434,433)
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> (600,716)
<AVERAGE-NET-ASSETS> 123,445,442
<PER-SHARE-NAV-BEGIN> 14.60
<PER-SHARE-NII> 0.78
<PER-SHARE-GAIN-APPREC> 0.57
<PER-SHARE-DIVIDEND> (0.79)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 15.16
<EXPENSE-RATIO> 0.48
</TABLE>
