<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000915802
<NAME> PRIME MONEY MARKET FUND
<SERIES>
<NUMBER> 061
<NAME> CLASS I
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> APR-30-2000
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 140472525
<INVESTMENTS-AT-VALUE> 140472525
<RECEIVABLES> 254816
<ASSETS-OTHER> 1403
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 140728744
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 691987
<TOTAL-LIABILITIES> 691987
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 140043442
<SHARES-COMMON-STOCK> 140011271
<SHARES-COMMON-PRIOR> 167259552
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (6685)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 0
<NET-ASSETS> 140036757
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 10120265
<OTHER-INCOME> 0
<EXPENSES-NET> (362760)
<NET-INVESTMENT-INCOME> 9757505
<REALIZED-GAINS-CURRENT> (6728)
<APPREC-INCREASE-CURRENT> 0
<NET-CHANGE-FROM-OPS> 9750777
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (9750052)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 994110000
<NUMBER-OF-SHARES-REDEEMED> (1026946937)
<SHARES-REINVESTED> 4930917
<NET-CHANGE-IN-ASSETS> 27222835
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 43
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 72352
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 511198
<AVERAGE-NET-ASSETS> 181877143
<PER-SHARE-NAV-BEGIN> 1.00
<PER-SHARE-NII> 0.05
<PER-SHARE-GAIN-APPREC> 0
<PER-SHARE-DIVIDEND> (0.05)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 1.00
<EXPENSE-RATIO> 0.20
</TABLE>
