WARNING: THE EDGAR SYSTEM ENCOUNTERED ERROR(S) WHILE PROCESSING THIS SCHEDULE.
<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000855022
<NAME> MUNDER INTERNATIONAL EQUITY
<SERIES>
<NUMBER> 081
<NAME> 6M1B-class-A
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> JUN-30-2000
<PERIOD-START> JUL-01-1999
<PERIOD-END> JUN-30-2000
<INVESTMENTS-AT-COST> 189331409
<INVESTMENTS-AT-VALUE> 262256658
<RECEIVABLES> 4892868
<ASSETS-OTHER> 18014
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 267167540
<PAYABLE-FOR-SECURITIES> 582154
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 50166110
<TOTAL-LIABILITIES> 50748264
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 134057974
<SHARES-COMMON-STOCK> 606036
<SHARES-COMMON-PRIOR> 988689
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> 9435617
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 72925685
<NET-ASSETS> 216419276
<DIVIDEND-INCOME> 5388647
<INTEREST-INCOME> 210885
<OTHER-INCOME> 381472
<EXPENSES-NET> (2651385)
<NET-INVESTMENT-INCOME> 3329619
<REALIZED-GAINS-CURRENT> 27461775
<APPREC-INCREASE-CURRENT> 16738375
<NET-CHANGE-FROM-OPS> 47529769
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (116429)
<DISTRIBUTIONS-OF-GAINS> (572043)
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 7476474
<NUMBER-OF-SHARES-REDEEMED> (7883249)
<SHARES-REINVESTED> 24122
<NET-CHANGE-IN-ASSETS> (7605549)
<ACCUMULATED-NII-PRIOR> 201333
<ACCUMULATED-GAINS-PRIOR> 7112369
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 1637000
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 2651000
<AVERAGE-NET-ASSETS> 8320000
<PER-SHARE-NAV-BEGIN> 16.21
<PER-SHARE-NII> 0.25
<PER-SHARE-GAIN-APPREC> 3.47
<PER-SHARE-DIVIDEND> (0.28)
<PER-SHARE-DISTRIBUTIONS> (1.59)
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 18.06
<EXPENSE-RATIO> 1.30
[AVG-DEBT-OUTSTANDING] 0
[AVG-DEBT-PER-SHARE] 0
</TABLE>
