<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000890540
<NAME> OVB
<SERIES>
<NUMBER> 110
<NAME> WEST VIRGINIA TAX EXEMPT INCOME PORTFOLIO CLASS A
<MULTIPLIER> 1,000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> JAN-31-2001
<PERIOD-START> FEB-01-2000
<PERIOD-END> JUL-31-2000
<INVESTMENTS-AT-COST> 84699
<INVESTMENTS-AT-VALUE> 84393
<RECEIVABLES> 0
<ASSETS-OTHER> 917
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 85310
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 0
<TOTAL-LIABILITIES> 0
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 85931
<SHARES-COMMON-STOCK> 7970
<SHARES-COMMON-PRIOR> 8122
<ACCUMULATED-NII-CURRENT> 0
<OVERDISTRIBUTION-NII> (351)
<ACCUMULATED-NET-GAINS> 36
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (306)
<NET-ASSETS> 85310
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 2471
<OTHER-INCOME> 0
<EXPENSES-NET> (314)
<NET-INVESTMENT-INCOME> 2157
<REALIZED-GAINS-CURRENT> 84
<APPREC-INCREASE-CURRENT> 3190
<NET-CHANGE-FROM-OPS> 5431
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (1947)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 166
<NUMBER-OF-SHARES-REDEEMED> (318)
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> 1473
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> (339)
<OVERDIST-NET-GAINS-PRIOR> (48)
<GROSS-ADVISORY-FEES> 189
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 365
<AVERAGE-NET-ASSETS> 84668
<PER-SHARE-NAV-BEGIN> 9.20
<PER-SHARE-NII> 0.24
<PER-SHARE-GAIN-APPREC> 0.36
<PER-SHARE-DIVIDEND> (0.24)
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 9.56
<EXPENSE-RATIO> 0.72
</TABLE>