<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000741375
<NAME> MAS FUNDS
<SERIES>
<NUMBER> 14
<NAME> FIXED INCOME PORTFOLIO II, 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> 374,026
<INVESTMENTS-AT-VALUE> 364,183
<RECEIVABLES> 22,637
<ASSETS-OTHER> 33
<OTHER-ITEMS-ASSETS> 2,347
<TOTAL-ASSETS> 389,200
<PAYABLE-FOR-SECURITIES> 104,164
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 5,895
<TOTAL-LIABILITIES> 110,059
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 299,020
<SHARES-COMMON-STOCK> 26,166
<SHARES-COMMON-PRIOR> 35,826
<ACCUMULATED-NII-CURRENT> 5,226
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (16,038)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (9,067)
<NET-ASSETS> 279,141
<DIVIDEND-INCOME> 253
<INTEREST-INCOME> 25,171
<OTHER-INCOME> 0
<EXPENSES-NET> (1,643)
<NET-INVESTMENT-INCOME> 23,781
<REALIZED-GAINS-CURRENT> (7,438)
<APPREC-INCREASE-CURRENT> (3,440)
<NET-CHANGE-FROM-OPS> 19,783
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (24,141)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 1,282
<NUMBER-OF-SHARES-REDEEMED> (13,094)
<SHARES-REINVESTED> 2,152
<NET-CHANGE-IN-ASSETS> (105,752)
<ACCUMULATED-NII-PRIOR> 6,422
<ACCUMULATED-GAINS-PRIOR> (9,370)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,276
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,660
<AVERAGE-NET-ASSETS> 340,443,561
<PER-SHARE-NAV-BEGIN> 10.74
<PER-SHARE-NII> 0.78
<PER-SHARE-GAIN-APPREC> (0.12)
<PER-SHARE-DIVIDEND> (0.73)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.67
<EXPENSE-RATIO> 0.49
</TABLE>
