<TABLE> <S> <C>
<ARTICLE> 6
<CIK> 0000830487
<NAME> MUNICIPAL HIGH INCOME FUND
<S> <C>
<PERIOD-TYPE> 6-MOS
<FISCAL-YEAR-END> OCT-31-2000
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 183,615,977
<INVESTMENTS-AT-VALUE> 175,314,657
<RECEIVABLES> 4,019,003
<ASSETS-OTHER> 0
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 179,333,660
<PAYABLE-FOR-SECURITIES> 0
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 655,013
<TOTAL-LIABILITIES> 655,013
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 190,178,675
<SHARES-COMMON-STOCK> 20,455,083
<SHARES-COMMON-PRIOR> 20,455,083
<ACCUMULATED-NII-CURRENT> (139,526)
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (3,059,182)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> (8,301,320)
<NET-ASSETS> 178,678,647
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 6,626,846
<OTHER-INCOME> 0
<EXPENSES-NET> 634,949
<NET-INVESTMENT-INCOME> 5,991,897
<REALIZED-GAINS-CURRENT> (199,701)
<APPREC-INCREASE-CURRENT> (5,246,216)
<NET-CHANGE-FROM-OPS> 545,980
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 5,952,435
<DISTRIBUTIONS-OF-GAINS> 0
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 0
<NUMBER-OF-SHARES-REDEEMED> 0
<SHARES-REINVESTED> 0
<NET-CHANGE-IN-ASSETS> (5,406,455)
<ACCUMULATED-NII-PRIOR> (178,988)
<ACCUMULATED-GAINS-PRIOR> (2,859,481)
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 359,534
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 634,949
<AVERAGE-NET-ASSETS> 180,679,243
<PER-SHARE-NAV-BEGIN> 9.00
<PER-SHARE-NII> 0.29
<PER-SHARE-GAIN-APPREC> (0.26)
<PER-SHARE-DIVIDEND> 0.29
<PER-SHARE-DISTRIBUTIONS> 0.00
<RETURNS-OF-CAPITAL> 0.00
<PER-SHARE-NAV-END> 8.74
<EXPENSE-RATIO> 0.71
</TABLE>
