MSDW MUNICIPAL INCOME OPPORTUNITIES TRUST
NSAR-A, 2000-01-27
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<PAGE>      PAGE  1
000 A000000 11/30/1999
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001 A000000 MSDW MUNICIPAL INCOME OPPORTUNITIES TRUST
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002 A000000 TWO WORLD TRADE CENTER
002 B000000 NEW YORK
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008 A000001 MORGAN STANLEY DEAN WITTER ADVISORS INC.
008 B000001 A
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022 A000001 EDWARDS (A.G.) & SONS, INC.
022 B000001 43-0895447
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022 A000002 SMITH BARNEY SHEARSON INC.
022 B000002 13-1912900
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022 A000003 SIMS (HERBERT J.) & CO,. INC.
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022 A000010 MERRILL LYNCH, PIERCE, FEN & SM INC.
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SIGNATURE   BARRY FINK
TITLE       VICE PRESIDENT



<TABLE> <S> <C>

<ARTICLE> 6
<LEGEND>
MSDW Municipal Income Opportuninities Trust
</LEGEND>

<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          MAY-31-2000
<PERIOD-END>                               NOV-30-1999
<INVESTMENTS-AT-COST>                      185,790,355
<INVESTMENTS-AT-VALUE>                     172,286,793
<RECEIVABLES>                                7,738,604
<ASSETS-OTHER>                                 211,208
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                             180,236,605
<PAYABLE-FOR-SECURITIES>                   (6,483,698)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (278,663)
<TOTAL-LIABILITIES>                        (6,762,361)
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   199,718,242
<SHARES-COMMON-STOCK>                       21,084,072
<SHARES-COMMON-PRIOR>                       21,089,872
<ACCUMULATED-NII-CURRENT>                    3,509,320
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                   (16,249,756)
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                  (13,503,562)
<NET-ASSETS>                               173,474,244
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            6,923,026
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (822,498)
<NET-INVESTMENT-INCOME>                      6,100,528
<REALIZED-GAINS-CURRENT>                       214,080
<APPREC-INCREASE-CURRENT>                  (9,561,007)
<NET-CHANGE-FROM-OPS>                      (3,246,399)
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                  (6,431,999)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                    (5,800)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                     (9,726,129)
<ACCUMULATED-NII-PRIOR>                      3,840,791
<ACCUMULATED-GAINS-PRIOR>                 (16,463,836)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                        (445,251)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                              (826,779)
<AVERAGE-NET-ASSETS>                       177,127,288
<PER-SHARE-NAV-BEGIN>                             8.69
<PER-SHARE-NII>                                   0.29
<PER-SHARE-GAIN-APPREC>                         (0.44)
<PER-SHARE-DIVIDEND>                            (0.31)
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               8.23
<EXPENSE-RATIO>                                   0.93


</TABLE>


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