<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000741375
<NAME> MAS FUNDS
<SERIES>
<NUMBER> 23
<NAME> GLOBAL FIXED INCOME PORTFOLIO, INSTITUTIONAL CLASS
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 38,030
<INVESTMENTS-AT-VALUE> 34,512
<RECEIVABLES> 1,538
<ASSETS-OTHER> 7
<OTHER-ITEMS-ASSETS> 1,500
<TOTAL-ASSETS> 37,557
<PAYABLE-FOR-SECURITIES> 2,536
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 194
<TOTAL-LIABILITIES> 2,730
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 41,725
<SHARES-COMMON-STOCK> 3,771
<SHARES-COMMON-PRIOR> 6,148
<ACCUMULATED-NII-CURRENT> (1,635)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (1,666)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (3,597)
<NET-ASSETS> 34,827
<DIVIDEND-INCOME> 92
<INTEREST-INCOME> 2,609
<OTHER-INCOME> 0
<EXPENSES-NET> (294)
<NET-INVESTMENT-INCOME> 2,407
<REALIZED-GAINS-CURRENT> (4,549)
<APPREC-INCREASE-CURRENT> (630)
<NET-CHANGE-FROM-OPS> (2,772)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2,301)
<DISTRIBUTIONS-OF-GAINS> (1,663)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 793
<NUMBER-OF-SHARES-REDEEMED> (3,543)
<SHARES-REINVESTED> 373
<NET-CHANGE-IN-ASSETS> (29,232)
<ACCUMULATED-NII-PRIOR> 1,121
<ACCUMULATED-GAINS-PRIOR> 1,684
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 185
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 308
<AVERAGE-NET-ASSETS> 49,438
<PER-SHARE-NAV-BEGIN> 10.42
<PER-SHARE-NII> 0.53
<PER-SHARE-GAIN-APPREC> (1.06)
<PER-SHARE-DIVIDEND> (0.38)
<PER-SHARE-DISTRIBUTIONS> (0.28)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.23
<EXPENSE-RATIO> 0.62
</TABLE>
