<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
this schedule contains summary financial information extracted from mason street
funds, inc. asset allocation fund, 09/30/00 financial statement class a.
</LEGEND>
<CIK> 0001023744
<NAME> MASON STREET FUNDS, INC.
<SERIES>
<NUMBER> 041
<NAME> ASSET ALLOCATION FUND CLASS A
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-START> APR-01-2000
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 59,561,567
<INVESTMENTS-AT-VALUE> 70,288,996
<RECEIVABLES> 2,052,324
<ASSETS-OTHER> 93,641
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 72,434,961
<PAYABLE-FOR-SECURITIES> 1,620,098
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 348,654
<TOTAL-LIABILITIES> 1,968,752
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 52,318,880
<SHARES-COMMON-STOCK> 3,828,679
<SHARES-COMMON-PRIOR> 3,777,996
<ACCUMULATED-NII-CURRENT> 1,377,197
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 6,250,547
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 10,519,585
<NET-ASSETS> 70,466,209
<DIVIDEND-INCOME> 140,922
<INTEREST-INCOME> 1,321,986
<OTHER-INCOME> 0
<EXPENSES-NET> (500,839)
<NET-INVESTMENT-INCOME> 962,069
<REALIZED-GAINS-CURRENT> 2,666,155
<APPREC-INCREASE-CURRENT> (2,421,215)
<NET-CHANGE-FROM-OPS> 1,207,009
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 116,065
<NUMBER-OF-SHARES-REDEEMED> 65,382
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 3,031,902
<ACCUMULATED-NII-PRIOR> 416,361
<ACCUMULATED-GAINS-PRIOR> 3,554,449
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 241,623
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 545,023
<AVERAGE-NET-ASSETS> 56,862,272
<PER-SHARE-NAV-BEGIN> 14.93
<PER-SHARE-NII> 0.22
<PER-SHARE-GAIN-APPREC> 0.04
<PER-SHARE-DIVIDEND> 0.00
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 15.19
<EXPENSE-RATIO> 1.35
</TABLE>
