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<TABLE> <S> <C>
<ARTICLE> 6
<SERIES>
<NUMBER> 052
<NAME> U.S. GOVT SECURITIES FUND CL. B
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> OCT-31-2000
<INVESTMENTS-AT-COST> 474,048,771
<INVESTMENTS-AT-VALUE> 468,820,274
<RECEIVABLES> 3,665,332
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 17,138,350
<TOTAL-ASSETS> 489,623,956
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 18,621,731
<TOTAL-LIABILITIES> 18,621,731
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 60,872,875
<SHARES-COMMON-STOCK> 5,224,600
<SHARES-COMMON-PRIOR> 6,928,738
<ACCUMULATED-NII-CURRENT> 166,896
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (71,155,108)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (5,228,497)
<NET-ASSETS> 55,070,823
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 32,631,921
<OTHER-INCOME> 0
<EXPENSES-NET> 4,002,952
<NET-INVESTMENT-INCOME> 28,644,232
<REALIZED-GAINS-CURRENT> (1,911,166)
<APPREC-INCREASE-CURRENT> 3,272,397
<NET-CHANGE-FROM-OPS> 30,005,463
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (3,273,470)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,581,026
<NUMBER-OF-SHARES-REDEEMED> (3,533,243)
<SHARES-REINVESTED> 248,079
<NET-CHANGE-IN-ASSETS> (8,048,110)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> (69,289,201)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 2,307,217
<INTEREST-EXPENSE> 0
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<AVERAGE-NET-ASSETS> 61,070,704
<PER-SHARE-NAV-BEGIN> 10.50
<PER-SHARE-NII> 0.56
<PER-SHARE-GAIN-APPREC> 0.04
<PER-SHARE-DIVIDEND> (0.56)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 10.54
<EXPENSE-RATIO> 1.66
</TABLE>
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