WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000929523
<NAME> TOTAL RETURN BOND FUND
<SERIES>
<NUMBER> 004
<NAME> TOTAL RETURN BOND FUND (CLASS Z)
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUNE-30-2000
<INVESTMENTS-AT-COST> 270,405,117
<INVESTMENTS-AT-VALUE> 263,369,551
<RECEIVABLES> 8,988,064
<ASSETS-OTHER> 30,144
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 272,387,759
<PAYABLE-FOR-SECURITIES> 3,747,413
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,579,119
<TOTAL-LIABILITIES> 5,326,532
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 295,338,477
<SHARES-COMMON-STOCK> 21,881,769
<SHARES-COMMON-PRIOR> 23,718,955
<ACCUMULATED-NII-CURRENT> 266,785
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (21,466,698)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (7,077,337)
<NET-ASSETS> 267,061,227
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 11,185,826
<OTHER-INCOME> 0
<EXPENSES-NET> 2,016,824
<NET-INVESTMENT-INCOME> 9,169,002
<REALIZED-GAINS-CURRENT> (6,254,571)
<APPREC-INCREASE-CURRENT> 2,955,760
<NET-CHANGE-FROM-OPS> 5,870,191
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (9,169,002)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 32,740,386
<NUMBER-OF-SHARES-REDEEMED> (62,508,033)
<SHARES-REINVESTED> 7,288,552
<NET-CHANGE-IN-ASSETS> (25,777,906)
<ACCUMULATED-NII-PRIOR> 534,165
<ACCUMULATED-GAINS-PRIOR> (15,479,507)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 689,228
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2,016,824
<AVERAGE-NET-ASSETS> 47,906,000
<PER-SHARE-NAV-BEGIN> 12.34
<PER-SHARE-NII> 0.42
<PER-SHARE-GAIN-APPREC> (0.14)
<PER-SHARE-DIVIDEND> (0.42)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 12.20
<EXPENSE-RATIO> 0.95
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0.00
</TABLE>
