<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000889170
<NAME> MEEDER ADVISOR FUNDS
<SERIES>
<NUMBER> 0041
<NAME> CORE EQUITY FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> DEC-31-2000
<PERIOD-START> JAN-01-2000
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 9913943
<INVESTMENTS-AT-VALUE> 12347322
<RECEIVABLES> 345750
<ASSETS-OTHER> 9958
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 12703030
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 83885
<TOTAL-LIABILITIES> 83885
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 10175946
<SHARES-COMMON-STOCK> 389176 <F1>
<SHARES-COMMON-PRIOR> 0 <F1>
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 1853
<ACCUMULATED-NET-GAINS> 11673
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 2433379
<NET-ASSETS> 12619145
<DIVIDEND-INCOME> 115735
<INTEREST-INCOME> 53200
<OTHER-INCOME> 0
<EXPENSES-NET> 201932
<NET-INVESTMENT-INCOME> (32,997)
<REALIZED-GAINS-CURRENT> 56172
<APPREC-INCREASE-CURRENT> 1925520
<NET-CHANGE-FROM-OPS> 1948695
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 0 <F1>
<DISTRIBUTIONS-OF-GAINS> 100611 <F1>
<DISTRIBUTIONS-OTHER> 0 <F1>
<NUMBER-OF-SHARES-SOLD> 333876 <F1>
<NUMBER-OF-SHARES-REDEEMED> 301269 <F1>
<SHARES-REINVESTED> 5668 <F1>
<NET-CHANGE-IN-ASSETS> 4778646
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 175738
<OVERDISTRIB-NII-PRIOR> 1235
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 0
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 114653
<AVERAGE-NET-ASSETS> 7448721 <F1>
<PER-SHARE-NAV-BEGIN> 15.32 <F1>
<PER-SHARE-NII> (0.04)<F1>
<PER-SHARE-GAIN-APPREC> 3.27 <F1>
<PER-SHARE-DIVIDEND> 0.00 <F1>
<PER-SHARE-DISTRIBUTIONS> 0.27 <F1>
<RETURNS-OF-CAPITAL> 0.00 <F1>
<PER-SHARE-NAV-END> 18.28 <F1>
<EXPENSE-RATIO> 1.77 <F1>
<FN>
<F1> CLASS A
</FN>
</TABLE>
