<ARTICLE> 6
<LEGEND>
MSDW QUALITY MUNICIPAL INVESTMENT TRUST


                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          OCT-31-2000
<PERIOD-END>                               OCT-31-2000
<INVESTMENTS-AT-COST>                      337,852,627
<INVESTMENTS-AT-VALUE>                     346,490,218
<RECEIVABLES>                                6,103,706
<ASSETS-OTHER>                                 103,648
<OTHER-ITEMS-ASSETS>                        10,527,600
<TOTAL-ASSETS>                             363,225,172
<PAYABLE-FOR-SECURITIES>                  (10,432,753)
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                    (403,647)
<TOTAL-LIABILITIES>                       (10,836,400)
<SENIOR-EQUITY>                            105,000,000
<PAID-IN-CAPITAL-COMMON>                   235,995,494
<SHARES-COMMON-STOCK>                       16,899,913
<SHARES-COMMON-PRIOR>                       17,676,713
<ACCUMULATED-NII-CURRENT>                    2,517,805
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        237,882
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     8,637,591
<NET-ASSETS>                               352,388,772
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           22,032,345
<OTHER-INCOME>                                       0
<EXPENSES-NET>                             (1,823,568)
<NET-INVESTMENT-INCOME>                     20,208,777
<REALIZED-GAINS-CURRENT>                       730,570
<APPREC-INCREASE-CURRENT>                    3,145,492
<NET-CHANGE-FROM-OPS>                       24,084,839
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                 (20,218,784)
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                  (776,800)
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                     (6,244,630)
<ACCUMULATED-NII-PRIOR>                      2,527,812
<ACCUMULATED-GAINS-PRIOR>                    (492,688)
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                      (1,234,426)
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                            (1,841,967)
<AVERAGE-NET-ASSETS>                       245,765,623
<PER-SHARE-NAV-BEGIN>                            14.35
<PER-SHARE-NII>                                   1.18
<PER-SHARE-GAIN-APPREC>                           0.29
<PER-SHARE-DIVIDEND>                            (1.18)
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              14.64
<EXPENSE-RATIO>                                   0.75