<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000933781
<NAME> BUFFALO HIGH YIELD FUND
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> MAR-31-2001
<PERIOD-END> SEP-30-2000
<INVESTMENTS-AT-COST> 45518
<INVESTMENTS-AT-VALUE> 36597
<RECEIVABLES> 1598
<ASSETS-OTHER> 266
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 1864
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 32
<TOTAL-LIABILITIES> 32
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 50485
<SHARES-COMMON-STOCK> 3818
<SHARES-COMMON-PRIOR> 0
<ACCUMULATED-NII-CURRENT> 203
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (3338)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (8921)
<NET-ASSETS> 38429
<DIVIDEND-INCOME> 340
<INTEREST-INCOME> 1799
<OTHER-INCOME> 0
<EXPENSES-NET> 216
<NET-INVESTMENT-INCOME> 1923
<REALIZED-GAINS-CURRENT> (3240)
<APPREC-INCREASE-CURRENT> 2754
<NET-CHANGE-FROM-OPS> 1437
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> (2035)
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 2017
<NUMBER-OF-SHARES-REDEEMED> (8426)
<SHARES-REINVESTED> 1661
<NET-CHANGE-IN-ASSETS> (5346)
<ACCUMULATED-NII-PRIOR> 0
<ACCUMULATED-GAINS-PRIOR> 0
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 216
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 216
<AVERAGE-NET-ASSETS> 40271
<PER-SHARE-NAV-BEGIN> 10.21
<PER-SHARE-NII> (.77)
<PER-SHARE-GAIN-APPREC> (.12)
<PER-SHARE-DIVIDEND> .75
<PER-SHARE-DISTRIBUTIONS> 0
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 10.07
<EXPENSE-RATIO> 1.07
</TABLE>
