WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000741375
<NAME> MAS FUNDS
<SERIES>
<NUMBER> 282
<NAME> MULTI-ASSET-CLASS PORTFOLIO, INVESTMENT CLASS
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> SEP-30-2000
<PERIOD-START> OCT-01-1999
<PERIOD-END> SEP-31-2000
<INVESTMENTS-AT-COST> 143,490
<INVESTMENTS-AT-VALUE> 151,280
<RECEIVABLES> 6,594
<ASSETS-OTHER> 18
<OTHER-ITEMS-ASSETS> 18,006
<TOTAL-ASSETS> 175,898
<PAYABLE-FOR-SECURITIES> 25,542
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 1,357
<TOTAL-LIABILITIES> 26,899
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 134,219
<SHARES-COMMON-STOCK> 481
<SHARES-COMMON-PRIOR> 584
<ACCUMULATED-NII-CURRENT> 1,321
<OVERDISTRIBUTION-NII> 54
<ACCUMULATED-NET-GAINS> 10,776
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 5,325
<NET-ASSETS> 148,999
<DIVIDEND-INCOME> 608
<INTEREST-INCOME> 5,436
<OTHER-INCOME> 0
<EXPENSES-NET> (1,279)
<NET-INVESTMENT-INCOME> 4,765
<REALIZED-GAINS-CURRENT> 9,308
<APPREC-INCREASE-CURRENT> (1,453)
<NET-CHANGE-FROM-OPS> 12,620
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (163)
<DISTRIBUTIONS-OF-GAINS> (783)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 10
<NUMBER-OF-SHARES-REDEEMED> (198)
<SHARES-REINVESTED> 85
<NET-CHANGE-IN-ASSETS> (11,109)
<ACCUMULATED-NII-PRIOR> 2,087
<ACCUMULATED-GAINS-PRIOR> 16,560
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1,057
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 1,282
<AVERAGE-NET-ASSETS> 162,778
<PER-SHARE-NAV-BEGIN> 12.41
<PER-SHARE-NII> 0.33
<PER-SHARE-GAIN-APPREC> 0.60
<PER-SHARE-DIVIDEND> (0.40)
<PER-SHARE-DISTRIBUTIONS> (1.36)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 11.58
<EXPENSE-RATIO> 0.93
</TABLE>
