<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains summary financial information
extracted from MML
form N-SAR for the period ended June 30, 2000
and is qualified in its entirety by reference to
such financial statements.
</LEGEND>
<SERIES>
<NUMBER> 3
<NAME> MML Managed Bond Fund
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 226,598,006
<INVESTMENTS-AT-VALUE> 221,079,434
<RECEIVABLES> 3,762,005
<ASSETS-OTHER> 4,672
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 224,846,111
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 11,699,338
<TOTAL-LIABILITIES> 11,699,338
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 219,448,946
<SHARES-COMMON-STOCK> 17,942,587
<SHARES-COMMON-PRIOR> 20,663,404
<ACCUMULATED-NII-CURRENT> 3,570,196
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (4,353,797)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (5,518,572)
<NET-ASSETS> 213,146,773
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 7,936,994
<OTHER-INCOME> 0
<EXPENSES-NET> 550,077
<NET-INVESTMENT-INCOME> 7,386,917
<REALIZED-GAINS-CURRENT> (2,366,261)
<APPREC-INCREASE-CURRENT> 3,973,770
<NET-CHANGE-FROM-OPS> 8,994,426
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 3,866,691
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,337,893
<NUMBER-OF-SHARES-REDEEMED> 4,702,283
<SHARES-REINVESTED> 643,573
<NET-CHANGE-IN-ASSETS> (26,762,789)
<ACCUMULATED-NII-PRIOR> 49,970
<ACCUMULATED-GAINS-PRIOR> (1,987,536)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 529,767
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 550,077
<AVERAGE-NET-ASSETS> 225,637,000
<PER-SHARE-NAV-BEGIN> 11.61
<PER-SHARE-NII> 0.40
<PER-SHARE-GAIN-APPREC> 0.08
<PER-SHARE-DIVIDEND> (0.21)
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 11.88
<EXPENSE-RATIO> 0.49
</TABLE>
