<TABLE> <S> <C>
<ARTICLE> 6
<LEGEND>
This schedule contains Summary Financial Information extracted from the Form
N-SAR and the financial statements and is qualified in its entirety by
references to such documents.
</LEGEND>
<SERIES>
<NUMBER> 014
<NAME> NUVEEN INTERMEDIATE DURATION MUNI BOND FUND - CLASS R
<MULTIPLIER> 1000
<S> <C>
<PERIOD-TYPE> 12-MOS
<FISCAL-YEAR-END> APR-30-2000
<PERIOD-START> MAY-01-1999
<PERIOD-END> APR-30-2000
<INVESTMENTS-AT-COST> 2533954
<INVESTMENTS-AT-VALUE> 2590994
<RECEIVABLES> 54126
<ASSETS-OTHER> 5926
<OTHER-ITEMS-ASSETS> 0
<TOTAL-ASSETS> 2651046
<PAYABLE-FOR-SECURITIES> 8586
<SENIOR-LONG-TERM-DEBT> 0
<OTHER-ITEMS-LIABILITIES> 12100
<TOTAL-LIABILITIES> 20686
<SENIOR-EQUITY> 0
<PAID-IN-CAPITAL-COMMON> 2570814
<SHARES-COMMON-STOCK> 279932
<SHARES-COMMON-PRIOR> 295863
<ACCUMULATED-NII-CURRENT> 2643
<OVERDISTRIBUTION-NII> 0
<ACCUMULATED-NET-GAINS> (137)
<OVERDISTRIBUTION-GAINS> 0
<ACCUM-APPREC-OR-DEPREC> 57040
<NET-ASSETS> 2630360
<DIVIDEND-INCOME> 0
<INTEREST-INCOME> 160658
<OTHER-INCOME> 0
<EXPENSES-NET> 16737
<NET-INVESTMENT-INCOME> 143921
<REALIZED-GAINS-CURRENT> (110)
<APPREC-INCREASE-CURRENT> (203225)
<NET-CHANGE-FROM-OPS> (59414)
<EQUALIZATION> 0
<DISTRIBUTIONS-OF-INCOME> 135743
<DISTRIBUTIONS-OF-GAINS> 3373
<DISTRIBUTIONS-OTHER> 0
<NUMBER-OF-SHARES-SOLD> 10637
<NUMBER-OF-SHARES-REDEEMED> 38143
<SHARES-REINVESTED> 11575
<NET-CHANGE-IN-ASSETS> (341350)
<ACCUMULATED-NII-PRIOR> 1260
<ACCUMULATED-GAINS-PRIOR> 3530
<OVERDISTRIB-NII-PRIOR> 0
<OVERDIST-NET-GAINS-PRIOR> 0
<GROSS-ADVISORY-FEES> 12494
<INTEREST-EXPENSE> 0
<GROSS-EXPENSE> 16861
<AVERAGE-NET-ASSETS> 2627839
<PER-SHARE-NAV-BEGIN> 9.58
<PER-SHARE-NII> .47
<PER-SHARE-GAIN-APPREC> (.66)
<PER-SHARE-DIVIDEND> (.47)
<PER-SHARE-DISTRIBUTIONS> (.01)
<RETURNS-OF-CAPITAL> 0
<PER-SHARE-NAV-END> 8.91
<EXPENSE-RATIO> .59
</TABLE>
