<TABLE> <S> <C>

<ARTICLE> 6
<CIK> 0000835333
<NAME> MUNICIPAL INCOME OPPORTUNITIES TRUST-ANNUAL-05/31/97
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAY-31-1997
<PERIOD-END>                               MAY-31-1997
<INVESTMENTS-AT-COST>                        179689970
<INVESTMENTS-AT-VALUE>                       172606630
<RECEIVABLES>                                  7636732
<ASSETS-OTHER>                                  121450
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                               180364812
<PAYABLE-FOR-SECURITIES>                       1501000
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       263924
<TOTAL-LIABILITIES>                            1764924
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     199754364
<SHARES-COMMON-STOCK>                         21089872
<SHARES-COMMON-PRIOR>                         21089872
<ACCUMULATED-NII-CURRENT>                      2960456
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                     (17031592)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     (7083340)
<NET-ASSETS>                                 178599888
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                             15101153
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 1908568
<NET-INVESTMENT-INCOME>                       13192585
<REALIZED-GAINS-CURRENT>                        883533
<APPREC-INCREASE-CURRENT>                      2410485
<NET-CHANGE-FROM-OPS>                         16486603
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                   (13180877)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                         3305726
<ACCUMULATED-NII-PRIOR>                        2948748
<ACCUMULATED-GAINS-PRIOR>                   (17915125)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           886834
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                1917821
<AVERAGE-NET-ASSETS>                         176880803
<PER-SHARE-NAV-BEGIN>                             8.31
<PER-SHARE-NII>                                   0.63
<PER-SHARE-GAIN-APPREC>                           0.16
<PER-SHARE-DIVIDEND>                            (0.63)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                               8.47
<EXPENSE-RATIO>                                   1.08
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


</TABLE>