MUNICIPAL INCOME TRUST III/MA
N-30D, 1994-04-20
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                          MUNICIPAL INCOME TRUST III
                            Two World Trade Center
                           New York, New York 10048

DEAR SHAREHOLDER:
===============================================================================

        Long-term revenue bond yields, as measured by The Bond Buyer, reached a
record low of 5.41 percent in mid October. However, strong economic growth and
fears of renewed inflationary pressures subsequently caused yields to rise.
This reversed the trend toward lower yields that had been in place for more
than three years. Municipal bond yields lagged the rise in U.S. Treasury bond
yields through January. During February, municipal bond prices deteriorated
substantially after the Federal Reserve Board increased the fed funds rate
which banks charge each other for overnight borrowing. By the end of the period
under review, The Bond Buyer Revenue Bond Index had climbed to 5.88 percent,
its highest level in almost a year.

        New-issue underwriting totaled a record $290 billion in 1993, a 23
percent increase over the previous high of $235 billion set in 1992. Refunding
issues, which are used by state and local governments to refinance higher-
coupon debt, represented 66 percent of total volume last year. New issues
backed by insurance had a 37 percent market share. This year's new-issue volume
is expected to decline by approximately 30 percent to the $200 billion range.
An estimated $260 billion in bonds will either mature or be called in 1994,
resulting in a decrease in outstanding municipal debt. For the first two months
of 1994, new-issue volume declined by 20 percent and totaled $30 billion.
Refunding activity, the catalyst of last year's record underwriting, dropped
even more sharply.

PERFORMANCE

        Municipal Income Trust III's (NYSE Symbol: TFC) total return for the
six months ended February 28, 1994 was -5.58 percent. This return was based on
the change in New York Stock Exchange (NYSE) market price from $10.25 to $9.375
per share and reinvestment of dividends and distributions. The net asset value
of TFC increased slightly from $10.05 to $10.07 per share.

        For the six-month period the Fund paid shareholders income dividends
totaling $0.30 per share and a capital gains distribution of $0.026. Beginning
with the February 25, 1994 distribution, the Fund's monthly dividend level was
reduced from $0.05 per share to $0.045 per share. This decrease was prompted by
the prospect of continued redemptions of older, high-coupon bonds.

PORTFOLIO STRUCTURE

        The Fund was fully invested throughout most of the six-month period in
long-term tax-exempt bonds. Short-term municipals were temporarily held for
cash flow purposes. Prerefunded bond holdings represented 28 percent of net
assets. The average credit rating was "A1" by Moody's Investors Service, Inc.
or "A+" by Standard & Poor's Corp. Non-performing loans represented 2.3 percent
of the Fund's assets at the end of the period. The Fund's average maturity and
call protection were 20 years and 9 years, respectively. Housing, hospital and
electric revenue bonds, the three largest portfolio sectors comprised 45
percent of net assets. Bonds subject to the alternative minimum tax (AMT)
accounted for 35 percent of net assets.

        We would like to remind you that the Trustees have approved a procedure
whereby the Fund, when appropriate, may attempt to reduce or eliminate a market
value discount from net asset by repurchasing shares in the open market or in
privately negotiated transactions at a price not above market value, if any, or
net asset value, whichever is lower at the time of purchase.

        We appreciate your support of Municipal Income Trust III and look
forward to continuing to serve your investment needs and objectives.

                                Very truly yours,
                                Charles A. Fiumefreddo
                                Chairman of the Board


<PAGE>

         
<TABLE>
MUNICIPAL INCOME TRUST III
PORTFOLIO OF INVESTMENTS February 28, 1994 (unaudited)
==================================================================================================================================
<CAPTION>
Principal
Amount (in                                                                                Coupon      Maturity
thousands)                                                                                 Rate        Date              Value
- ---------                                                                                  ----        ----              -----
<C>            <S>                                                                        <C>          <C>          <C>
               MUNICIPAL BONDS (98.9%)
               GENERAL OBLIGATION (5.0%)
$ 2,400        District of Columbia, Ser 1990 B (Prerefunded) .......................      7.50 %      6/ 1/10       $  2,809,200
    500        New York City, New York, Ser 1989 C...................................      6.50        8/15/08            516,035
- -------                                                                                                               -----------
  2,900                                                                                                                 3,325,235
- -------                                                                                                               -----------
               EDUCATIONAL FACILITIES REVENUE (4.7%)
  1,440        California Public Works Board, University of California
                1993 Ser A...........................................................      5.50        6/ 1/21          1,356,653
  1,000        Massachusetts Health & Educational Facilities Authority,
                Boston College Ser K.................................................      5.25        6/ 1/18            939,900
    750        West Virginia School Building Authority, Cap Impr Ser 1991 A..........      6.75        7/ 1/15            806,355
- -------                                                                                                               -----------
  3,190                                                                                                                 3,102,908
- -------                                                                                                               -----------
               ELECTRIC REVENUE (10.0%)
  1,155        Municipal Electric Authority of Georgia, Power Ser 1991 U
                (MBIA Insured) (Prerefunded).........................................      7.00        1/ 1/16          1,325,594
  2,000        San Antonio, Texas, Electric & Gas Refg Ser 1994 INFLOS...............      6.37 +      2/ 1/06          1,787,500
  3,000        Washington Public Power Supply System, Proj #2 Refg
                Ser 1990 C (Prerefunded).............................................      7.625       7/ 1/10          3,538,170
- -------                                                                                                               -----------
  6,155                                                                                                                 6,651,264
- -------                                                                                                               -----------
               HOSPITAL REVENUE (10.8%)
    925        Illinois Health Facilities Authority, Glen Oaks Medical Center Inc
                Refg 1990 Ser D......................................................      9.50       11/15/15          1,122,663
  1,625        Minneapolis & St Paul Housing & Redevelopment Authority,
                Health One Oblig Grp 1990 Ser B (Prerefunded)........................      8.00        8/15/14          1,949,009
  2,000        Comanche County Hospital Authority, Oklahoma, Ser 1989
                (Prerefunded)........................................................      8.05        7/ 1/16          2,362,000
  1,100        Montgomery County Higher E Health Authority, Pennsylvania,
                Frankford Hospital Ser 1986..........................................      7.875       1/ 1/19          1,185,371
    500        Washington County Municipal Authority, Pennsylvania,
                Shadyside Hospital Ser 1985 C-1 D (AMBAC Insured)
                (Prerefunded)........................................................      7.45       12/15/18            588,055
- -------                                                                                                               -----------
  6,150                                                                                                                 7,207,098
- -------                                                                                                               -----------
               INDUSTRIAL DEVELOPMENT/POLLUTION CONTROL
                REVENUE (7.8%)
  3,000        Cleveland, Ohio, Continental Airlines Inc Ser 1990 (AMT)..............      9.00       12/ 1/19          3,096,930
  2,005        Alliance Airport Authority, Texas, American Airlines Inc
                Ser 1990 (AMT).......................................................      7.50       12/ 1/29          2,143,886
- -------                                                                                                               -----------
  5,005                                                                                                                 5,240,816
- -------                                                                                                               -----------
               MORTGAGE REVENUE--SINGLE FAMILY (24.0%)
  2,000        Alaska Housing Finance Corporation, 1993 1st Ser......................      5.90       12/ 1/33          1,960,700
    645        Colorado Housing Finance Authority, Ser A-2 (AMT).....................      8.25        8/ 1/20            681,410
    385        Hawaii Housing Finance & Development Corporation, Purchase
                Ser 1989 A (AMT).....................................................      7.80        7/ 1/29            387,922
  2,495        Idaho Housing Agency, Ser 1988 D-2 (AMT)..............................      8.25        1/ 1/20          2,925,388
  4,530        Saint Tammany Public Trust Financing Authority, Louisiana,
                Refg Ser 1990 B......................................................      0.00        7/25/11          4,416,303
  1,000        Maine Housing Authority, Purchase Ser 1990 A-4 (AMT)..................      6.40       11/15/23          1,010,650
               Massachusetts Housing Finance Agency,
  1,500         Ser 1989 A (AMT).....................................................      8.10        8/ 1/09          1,596,150
    500         Ser 1989 A (AMT).....................................................      8.20        8/ 1/27            532,645
               Utah Housing Finance Agency,
    970         Ser 1991 Issue A-2 (AMT).............................................      7.75        1/ 1/23          1,057,028
  1,335         Ser 1991 Issue B-2 (AMT).............................................      7.75        1/ 1/23          1,454,776
- -------                                                                                                               -----------
 15,360                                                                                                                16,022,972
- -------                                                                                                               -----------

</TABLE>

<PAGE>

         
<TABLE>
MUNICIPAL INCOME TRUST III
PORTFOLIO OF INVESTMENTS February 28, 1994 (unaudited) (continued)
==================================================================================================================================
<CAPTION>
Principal
Amount (in                                                                                Coupon      Maturity
thousands)                                                                                 Rate        Date              Value
- ---------                                                                                  ----        ----              -----
<C>            <S>                                                                        <C>          <C>          <C>
               NURSING & LIFE CARE REVENUE (9.5%)
$ 2,573        Vista, California, Long-Term Care Foundation of America
                Ser 1989 (a)(b)......................................................      9.875%      1/ 1/20       $  1,543,800
  1,000        Marion, Iowa, AHF/Kentucky-Iowa Inc Ser 1990..........................     10.25        1/ 1/20          1,074,940
  2,000        Lexington-Fayette Urban County Government, Kentucky,
                AHF/Kentucky-Iowa Inc Ser 1990.......................................     10.25        1/ 1/20          2,149,880
  1,750        Metropolitan Government of Nashville & Davidson County
                Health & Educational Facilities Board, Tennessee, Metro-
                politan Nashville Teachers' Nursing Facility Inc Ser 1989............     10.25       10/ 1/19          1,557,500
- -------                                                                                                               -----------
  7,323                                                                                                                 6,326,120
- -------                                                                                                               -----------
               PUBLIC FACILITIES REVENUE (4.8%)
  2,750        Florence County Public Facilities Corporation, South Carolina,
- -------         Law Enforce & Civic Ctr 1990 COPs (AMBAC Insured)
                (Prerefunded)........................................................      7.60        3/ 1/14          3,202,870
                                                                                                                      -----------
               RESOURCE RECOVERY REVENUE (4.0%)
  2,500        Cambria County Industrial Development Authority,
                Pennsylvania, Cambria Cogen Co Ser 1989 F-2 (AMT)....................      7.75        9/ 1/19          2,692,850
- -------                                                                                                               -----------
               TRANSPORTATION REVENUE (9.7%)
  2,000        Denver, Colorado, Airport Ser 1990 A (AMT)............................      8.50       11/15/23          2,287,600
  2,480        Southwestern Illinois Development Authority, Tri-City Regional
                Port District Ser 1989 (AMT) (b).....................................      7.90        7/ 1/14          2,820,008
  1,500        Puerto Rico Highway & Transportation Authority,
                Refg Ser 1993 X......................................................      5.25        7/ 1/21          1,391,295
- -------                                                                                                               -----------
  5,980                                                                                                                 6,498,903
- -------                                                                                                               -----------
               WATER & SEWER REVENUE (2.4%)
  1,090        Erie County Water Authority, New York, 4th Resolution
                Refg Ser 1992 (AMBAC Insured)........................................      0.00       12/ 1/17            196,015
  1,500        Massachusetts Water Resources Authority, 1993 Ser C...................      5.25       12/ 1/20          1,388,415
- -------                                                                                                               -----------
  2,590                                                                                                                 1,584,430
- -------                                                                                                               -----------
               OTHER REVENUE (6.2%)
  1,000        Pasadena, California, Refg & Cap 1992 COPs............................      5.75        1/ 1/13          1,001,390
    500        Illinois Development Finance Authority, Church Road
                Partnership #2 Ser 1989 (AMT)........................................      7.875       9/ 1/14            547,050
  2,250        New York Local Government Assistance Corporation,
                Ser 1991 C (Prerefunded).............................................      7.00        4/ 1/21          2,599,042
- -------                                                                                                               -----------
  3,750                                                                                                                 4,147,482
- -------                                                                                                               -----------
$63,653        TOTAL INVESTMENTS (IDENTIFIED COST $61,692,689)(C) .................................      98.9%         66,002,948
=======        OTHER ASSETS IN EXCESS OF LIABILITIES...............................................       1.1             761,625
                                                                                                        ------        -----------
               NET ASSETS..........................................................................     100.0%        $66,764,573
                                                                                                        ======        ===========

<FN>
- ----------

 +   Current coupon rate for residual interest bonds. This rate resets periodically as the auction rate on the related short-term
     securities fluctuates.
(a)  Non-income producing, bond in default.
(b)  Resale is restricted to qualified accredited investors.
(c)  The aggregate cost for federal income tax purposes is $61,692,689; the aggregate gross unrealized appreciation is $5,836,998
     and the aggregate gross unrealized depreciation is $1,526,739, resulting in net unrealized appreciation of $4,310,259.

                                                See Notes to Financial Statements

</TABLE>

<PAGE>

         
<TABLE>
MUNICIPAL INCOME TRUST III
FINANCIAL STATEMENTS
===============================================================================
<CAPTION>
STATEMENT OF ASSETS AND LIABILITIES
February 28, 1994 (unaudited)
===============================================================================
<S>                                                               <C>
ASSETS:
Investments in securities, at value
 (identified cost $61,692,689) (Note 1) ....................      $66,002,948
Interest receivable.........................................        1,018,092
Deferred organizational expenses (Note 1)...................            5,372
Prepaid expenses and other assets...........................           31,087
                                                                   ----------
     TOTAL ASSETS...........................................       67,057,499
                                                                   ----------
LIABILITIES:
Payable to bank.............................................          179,279
Payable for shares of beneficial interest
 repurchased (Note 5).......................................           37,620
Investment advisory fee payable (Note 2)....................           23,097
Administration fee payable (Note 3).........................           14,436
Accrued expenses (Note 4)...................................           38,494
                                                                  -----------
     TOTAL LIABILITIES......................................          292,926
                                                                  -----------
NET ASSETS:
Paid-in-capital.............................................       61,397,812
Accumulated undistributed net realized
 gain on investments........................................          658,109
Net unrealized appreciation on investments..................        4,310,259
Accumulated undistributed net investment
 income.....................................................          398,393
                                                                  -----------
     NET ASSETS.............................................      $66,764,573
                                                                  ===========
NET ASSET VALUE PER SHARE, 6,628,086
 shares outstanding (unlimited shares
 authorized of $.01 par value)..............................           $10.07
                                                                       ======

===============================================================================
<CAPTION>
STATEMENT OF OPERATIONS For the six months
ended February 28, 1994 (unaudited)
===============================================================================
<S>                                                                <C>
INVESTMENT INCOME:
 INTEREST INCOME ...........................................       $2,337,326
                                                                   ----------
 EXPENSES
  Investment advisory fee (Note 2)..........................          133,873
  Administration fee (Note 3)...............................           83,670
  Professional fees.........................................           32,945
  Transfer agent fees and expenses
   (Note 4).................................................           16,290
  Trustees' fees and expenses...............................           11,083
  Shareholder reports and notices ..........................           10,860
  Registration fees.........................................            8,048
  Organizational expenses (Note 1)..........................            4,459
  Custodian fees............................................            1,810
  Other.....................................................            5,112
                                                                    ---------
     TOTAL EXPENSES.........................................          308,150
                                                                    ---------
       NET INVESTMENT INCOME................................        2,029,176
                                                                    ---------
NET REALIZED AND UNREALIZED GAIN
 (LOSS) ON INVESTMENTS (Note 1):
  Net realized gain on investments..........................          657,847
  Net change in unrealized appreciation on
   investments..............................................         (406,757)
                                                                   ----------
     NET GAIN ON INVESTMENTS................................          251,090
                                                                   ----------
     NET INCREASE IN NET ASSETS
      RESULTING FROM OPERATIONS.............................       $2,280,266
                                                                   ==========

</TABLE>

<PAGE>

         

<TABLE>
STATEMENT OF CHANGES IN NET ASSETS
==================================================================================================================================
<CAPTION>
                                                                                  For the six months
                                                                                         ended                     For the year
                                                                                   February 28, 1994                   ended
                                                                                      (unaudited)                 August 31, 1993
                                                                                  ------------------              ---------------
<S>                                                                                    <C>                         <C>

INCREASE (DECREASE) IN NET ASSETS:
 Operations:
  Net investment income....................................................             $ 2,029,176                  $ 4,158,772
  Net realized gain on investments.........................................                 657,847                      172,880
  Net change in unrealized appreciation....................................                (406,757)                   1,548,682
                                                                                        -----------                  -----------
   Net increase in net assets resulting from operations....................               2,280,266                    5,880,334
                                                                                        -----------                  -----------
 Dividends and distributions to shareholders from:
  Net investment income....................................................              (1,956,465)                  (3,979,228)
  Net realized gain on investments.........................................                (172,434)                    (273,905)
                                                                                        -----------                  -----------
   Total dividends and distributions.......................................              (2,128,899)                  (4,253,133)
                                                                                        -----------                  -----------
 Net decrease from transactions in shares of beneficial interest (Note 5)..                 (37,620)                       -0-
                                                                                        -----------                  -----------
   Total increase..........................................................                 113,747                    1,627,201
NET ASSETS:
 Beginning of period.......................................................              66,650,826                   65,023,625
                                                                                        -----------                  -----------
 END OF PERIOD (including undistributed net investment income
  of $398,393 and $325,682, respectively)..................................             $66,764,573                  $66,650,826
                                                                                        ===========                  ===========

                                                See Notes to Financial Statements

</TABLE>

<PAGE>

         

MUNICIPAL INCOME TRUST III
NOTES TO FINANCIAL STATEMENTS (unaudited)
===============================================================================

1. ORGANIZATION AND ACCOUNTING POLICIES--Municipal Income Trust III (the
"Fund") is registered under the Investment Company Act of 1940, as amended (the
"Act"), as a diversified, closed-end management investment company. It was
organized on June 26, 1989 as a Massachusetts business trust and commenced
operations on October 5, 1989.

        The following is a summary of significant accounting policies:

        A. Valuation of Investments--Portfolio securities are valued for the
        Fund by an outside independent pricing service approved by the Fund's
        Trustees. The pricing service has informed the Fund that in valuing the
        Fund's portfolio securities, it uses both a computerized grid matrix of
        tax-exempt securities and evaluations by its staff, in each case based
        on information concerning market transactions and quotations from
        dealers which reflect the bid side of the market each day. The Fund's
        portfolio securities are thus valued by reference to a combination of
        transactions and quotations for the same or other securities believed
        to be comparable in quality, coupon, maturity, type of issue, call
        provisions, trading characteristics and other features deemed to be
        relevant.

        B. Accounting for Investments--Security transactions are accounted for
        on the trade date (date the order to buy or sell is executed). In
        computing net investment income, the Fund amortizes premiums and
        original issue discounts on fixed income securities. Additionally, with
        respect to market discount on bonds purchased after April 30, 1993, a
        portion of any capital gain realized upon disposition is
        recharacterized as taxable investment income. Realized gains and losses
        on security transactions are determined on the identified cost method.
        Interest income is accrued daily except where collection is not
        expected.

        C. Federal Income Tax Status--It is the Fund's policy to comply with
        the requirements of the  Internal Revenue Code applicable to regulated
        investment companies and to distribute all of its taxable and
        nontaxable income to its shareholders. Accordingly, no federal income
        tax provision is required.

        D. Dividends and Distributions to Shareholders--The Fund records
        dividends and distributions to its shareholders on the ex-dividend
        date. The amount of dividends and distributions from net investment
        income and net realized capital gains are determined in accordance with
        federal income tax regulations, which may differ from generally
        accepted accounting principles. These "book/tax" differences are either
        considered temporary or permanent in nature. To the extent that these
        differences are permanent in nature, such amounts are reclassified
        within the capital accounts based on their federal tax-basis treatment;
        temporary differences do not require reclassifications. Dividends and
        distributions which exceed net investment income and net realized
        capital gains for financial reporting purposes but not for tax purposes
        are reported as dividends in excess of net investment income or
        distributions in excess of net realized capital gains. To the extent
        that they exceed net investment income and net realized capital gains
        for tax purposes, they are reported as distributions of paid-in-
        capital.

        E. Organizational Expenses--The Fund's Former Administrator paid the
        organizational expenses of the Fund in the amount of $45,000. The Fund
        reimbursed the Former Administrator for such expenses which are being
        amortized by the straight-line method over a period not to exceed five
        years from the commencement of operations.
2. INVESTMENT ADVISORY AGREEMENT--Pursuant to an Investment Advisory Agreement
(the "Advisory Agreement") with Dean Witter InterCapital Inc. (the "Investment
Adviser"), the Fund pays its Investment Adviser an advisory fee, calculated
weekly and payable monthly, by applying the following annual rates to the
Fund's average weekly net assets: 0.40% of the portion of the Fund's average
weekly net assets not exceeding $250 million and 0.30% of the portion of
average weekly net assets exceeding $250 million.

<PAGE>

         
MUNICIPAL INCOME TRUST III
NOTES TO FINANCIAL STATEMENTS (unaudited) (continued)
===============================================================================

        Under the terms of the Advisory Agreement, the Investment Adviser
manages the Fund's assets. Also, the Investment Adviser pays the salaries of
all personnel, including officers of the Fund, who are employees of the
Investment Adviser.

3. ADMINISTRATION AGREEMENT-- Through December 31, 1993, pursuant to an
Administration Agreement with Dean Witter InterCapital Inc. (the "Former
Administrator"), the Fund paid an administration fee, calculated weekly and
payable monthly, by applying the following annual rates to the Fund's average
weekly net assets: 0.25% of the portion of the Fund's average weekly net assets
not exceeding $250 million; 0.20% of the portion of average weekly net assets
exceeding $250 million but not exceeding $500 million; 0.167% of the portion of
average weekly net assets exceeding $500 million but not exceeding $750
million; and 0.133% of the portion of average weekly net assets exceeding $750
million. On January 1, 1994, the Administration Agreement between the Former
Administrator and the Fund had been terminated and a new Administration
Agreement had been entered into between Dean Witter Services Company Inc. (the
"Administrator"), a wholly-owned subsidiary of the Former Administrator, and
the Fund. The nature and scope of the services being provided to the Fund or
any fees being paid by the Fund under the new Agreement are identical to those
of the previous Agreement.

        Under the terms of the Administration Agreement, the Administrator
maintains certain of the Fund's books and records and furnishes, at its own
expense, such office space, facilities, equipment, clerical help, bookkeeping
and certain legal services as the Fund may reasonably require in the conduct of
its business. In addition, the Administrator pays the salaries of all
personnel, including officers of the Fund who are employees of the
Administrator.

4. SECURITY TRANSACTIONS AND TRANSACTIONS WITH AFFILIATES--The cost of
purchases and the proceeds from sales of portfolio securities for the six
months ended February 28, 1994, excluding short-term investments, aggregated
$7,723,044 and $6,170,667, respectively.

        Dean Witter Trust Company, an affiliate of the Investment Adviser and
Administrator, is the Fund's transfer agent. At February 28, 1994, the Fund had
transfer agent fees and expenses payable of $7,204.

<TABLE>
5. SHARES OF BENEFICIAL INTEREST--Transactions in shares of beneficial interest were as follows:
<CAPTION>
                                                                                                                Capital
                                                                                           Par Value            Paid In
                                                                                              of               Excess of
                                                                        Shares              Shares             Par Value
                                                                        ------              ------             --------
<S>                                                                       <C>                 <C>                 <C>

Balance, August 31, 1992 and August 31, 1993.....................      6,632,086           $66,321           $61,369,111
Treasury shares purchased and retired (weighted
 average discount 6.60%)*........................................        (4,000)               (40)              (37,580)
                                                                       ---------            -------          -----------
Balance, February 28, 1994.......................................      6,628,086           $66,281           $61,331,531
                                                                       =========            =======          ===========
<FN>
- ------------
* The Trustees have voted to retire the shares repurchased.
<CAPTION>
6. DIVIDENDS--The Fund has declared the following dividends from net investment income--

                                             Declaration           Amount              Record              Payable
                                                Date              Per Share             Date                Date
                                              ---------           ---------           ---------           ---------
                                                 <S>                 <C>                 <C>                 <C>
                                           March  1, 1994          $0.045           March 11, 1994      March 25, 1994
                                           March 29, 1994          $0.045           April  8, 1994      April 22, 1994
</TABLE>


<PAGE>

         
<TABLE>
MUNICIPAL INCOME TRUST III
NOTES TO FINANCIAL STATEMENTS (unaudited) (continued)
==================================================================================================================================
<CAPTION>
7. SELECTED QUARTERLY FINANCIAL DATA--
                                                                                                       Quarters Ended*
                                                                                              -----------------------------------
                                                                                                 2/28/94            11/30/93
                                                                                             ---------------     ---------------
                                                                                                        Per                 Per
                                                                                             Total     Share     Total     Share
                                                                                             -----     -----     -----     -----
<S>                                                                                         <C>        <C>       <C>       <C>
Total investment income .............................................................       $1,137     $0.17    $1,200     $0.18
Net investment income................................................................          994      0.15     1,035      0.16
Net realized and unrealized gain (loss) on investments...............................         (300)    (0.05)      551      0.08
<CAPTION>                                                                          Quarters Ended*
                                                     ------------------------------------------------------------------------------
                                                         8/31/93             5/31/93             2/29/93            11/30/92
                                                     ---------------     ---------------    ---------------      ---------------
                                                                Per                 Per                 Per                 Per
                                                     Total     Share     Total     Share     Total     Share     Total     Share
                                                     -----     -----     -----     -----     -----     -----     -----     -----
<S>                                                  <C>       <C>       <C>       <C>       <C>       <C>       <C>       <C>
Total investment income ..........................  $1,232     $0.19    $1,170     $0.17    $1,196     $0.18    $1,201     $0.18
Net investment income ............................   1,074      0.16     1,019      0.16     1,031      0.15     1,035      0.16
Net realized and unrealized gain (loss) on
 investments......................................    (160)    (0.03)      268      0.04     1,119      0.17       495      0.08
<FN>
- ------------
* Totals expressed in thousands of dollars.

<CAPTION>
FINANCIAL HIGHLIGHTS (unaudited)
==================================================================================================================================
Selected data and ratios for a share of beneficial interest outstanding throughout each period:

                                                                                         For the years           For the period
                                                                 For the six           ended August 31,         October 5, 1989*
                                                                months ended       ------------------------          through
                                                              February 28, 1994    1993      1992      1991      August 31, 1990
                                                              -----------------    ----      ----      ----      ---------------
<S>                                                                  <C>            <C>       <C>       <C>            <C>
PER SHARE OPERATING PERFORMANCE:
 Net asset value, beginning of period.......................       $10.05         $ 9.80    $ 9.60    $9.32          $9.30
                                                                   -------        ------    ------    ------         ------
  Net investment income.....................................         0.31           0.63      0.62     0.68           0.57
  Net realized and unrealized gain on
   investments..............................................         0.04           0.26      0.28     0.30           0.05
                                                                   -------        ------    ------    ------         ------
 Total from investment operations...........................         0.35           0.89      0.90     0.98           0.62
                                                                   -------        ------    ------    ------         ------
 Less dividends, distributions and other
  charges:
  Dividends from net investment income......................        (0.30)         (0.60)    (0.64)   (0.66)         (0.55)
  Distributions from net realized gain
   on investments...........................................        (0.03)         (0.04)    (0.06)   (0.04)           -0-
  Offering costs charged against capital....................          -0-            -0-       -0-      -0-          (0.05)
                                                                   -------        ------    ------    ------         ------
 Total dividends, distributions and other
  charges...................................................        (0.33)         (0.64)    (0.70)   (0.70)         (0.60)
                                                                   -------        ------    ------    ------         ------
 Net asset value, end of period.............................       $10.07         $10.05     $9.80    $9.60          $9.32
                                                                   =======        ======    ======    ======         ======
 Market value, end of period................................       $ 9.375        $10.25     $9.75    $9.625         $8.625
                                                                   =======        ======    ======    ======         ======
TOTAL INVESTMENT RETURN+....................................      (5.58%)(1)      12.27%     8.73%    20.38%       (8.37%)(1)
RATIOS/SUPPLEMENTAL DATA:
 Net assets, end of period (in thousands)...................       $66,765        $66,651   $65,024   $63,565        $62,147
 Ratio of expenses to average net assets....................       0.92%(2)        0.98%     1.00%     1.02%         1.10%(2)
 Ratio of net investment income to average
  net assets................................................       6.06%(2)        6.37%     6.38%     7.20%         6.76%(2)
 Portfolio turnover rate....................................           9%             2%        8%       40%           150%

<FN>
- ------------
 *   Commencement of operations.
 +   Total investment return is based upon the current market value on the first and last day of each period reported. Dividends
     and distributions are assumed to be reinvested at the prices obtained under the Fund's dividend reinvestment plan. Total
     investment return does not reflect sales charges or brokerage commissions.
(1)  Not annualized.
(2)  Annualized.
                                                See Notes to Financial Statements
- ----------------------------------------------------------------------------------------------------------------------------------
  The financial statements included herein have been taken from the records of the Fund without examination by the independent
accountants and accordingly they do not express an opinion thereon.
</TABLE>

<PAGE>

         
TRUSTEES
- -----------------------------------
Jack F. Bennett
Michael Bozic
Charles A. Fiumefreddo
Edwin J. Garn
John R. Haire
Dr. John E. Jeuck
Dr. Manuel H. Johnson
Paul Kolton
Michael E. Nugent
Philip J. Purcell
John L. Schroeder
Edward R. Telling
OFFICERS
- -----------------------------------
Charles A. Fiumefreddo
Chairman and Chief Executive Officer

Sheldon Curtis
Vice President, Secretary and General Counsel

James F. Willison
Vice President

Thomas F. Caloia
Treasurer
TRANSFER AGENT
- -----------------------------------
Dean Witter Trust Company
Harborside Financial Center--Plaza Two
Jersey City, New Jersey 07311
LEGAL COUNSEL
- -----------------------------------
Sheldon Curtis
Two World Trade Center
New York, New York 10048
INDEPENDENT ACCOUNTANTS
- -----------------------------------
Price Waterhouse
1177 Avenue of the Americas
New York, New York 10036
INVESTMENT ADVISER
- -----------------------------------
Dean Witter InterCapital Inc.
Two World Trade Center
New York, New York 10048


MUNICIPAL
INCOME
TRUST III


SEMIANNUAL REPORT
FEBRUARY 28, 1994


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