DEFINED ASSET FUNDS MUNICIPAL INV TR FD MON PYMT SER 555
S-6EL24/A, 1995-02-23
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   AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON FEBRUARY 23, 1995
                                                       REGISTRATION NO. 33-57099
    
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                             WASHINGTON, D.C. 20549
 
                   ------------------------------------------
 
                                AMENDMENT NO. 1
                                       TO
 
                                    FORM S-6
                   ------------------------------------------
 
                   FOR REGISTRATION UNDER THE SECURITIES ACT
                    OF 1933 OF SECURITIES OF UNIT INVESTMENT
                        TRUSTS REGISTERED ON FORM N-8B-2
 
                   ------------------------------------------
 
A. EXACT NAME OF TRUST:
                        MUNICIPAL INVESTMENT TRUST FUND
   
                          MONTHLY PAYMENT SERIES--555
    
                              DEFINED ASSET FUNDS
 
B. NAMES OF DEPOSITORS:
 
                   MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
                               SMITH BARNEY INC.
                            PAINEWEBBER INCORPORATED
                       PRUDENTIAL SECURITIES INCORPORATED
                           DEAN WITTER REYNOLDS INC.
 
C. COMPLETE ADDRESSES OF DEPOSITORS' PRINCIPAL EXECUTIVE OFFICES:

 MERRILL LYNCH, PIERCE,      SMITH BARNEY INC.    PAINEWEBBER INCORPORATED
        FENNER &               388 GREENWICH         1285 AVENUE OF THE
   SMITH INCORPORATED       STREET--23RD FLOOR            AMERICAS
   DEFINED ASSET FUNDS      NEW YORK, NY 10013      NEW YORK, N.Y. 10019
      P.O. BOX 9051
PRINCETON, NJ 08543-9051
  PRUDENTIAL SECURITIES
      INCORPORATED
    ONE SEAPORT PLAZA
    199 WATER STREET
  NEW YORK, N.Y. 10292
                                                  DEAN WITTER REYNOLDS INC.
                                                       TWO WORLD TRADE
                                                     CENTER--59TH FLOOR
                                                    NEW YORK, N.Y. 10048

D. NAMES AND COMPLETE ADDRESSES OF AGENTS FOR SERVICE:

  TERESA KONCICK, ESQ.    THOMAS D. HARMAN, ESQ.      ROBERT E. HOLLEY
      P.O. BOX 9051        388 GREENWICH STREET       1200 HARBOR BLVD.
PRINCETON, NJ 08543-9051   NEW YORK, N. Y. 10013    WEEHAWKEN, N.J. 07087
                                                         COPIES TO:
   LEE B. SPENCER, JR.      DOUGLAS LOWE, ESQ.     PIERRE DE SAINT PHALLE,
    ONE SEAPORT PLAZA    130 LIBERTY STREET--29TH           ESQ.
    199 WATER STREET               FLOOR            450 LEXINGTON AVENUE
  NEW YORK, N. Y. 10292    NEW YORK, N.Y. 10006     NEW YORK, N. Y. 10017
 
E. TITLE AND AMOUNT OF SECURITIES BEING REGISTERED:
 
  An indefinite number of Units of Beneficial Interest pursuant to Rule 24f-2
       promulgated under the Investment Company Act of 1940, as amended.
 
F. PROPOSED MAXIMUM OFFERING PRICE TO THE PUBLIC OF THE SECURITIES BEING
REGISTERED: Indefinite
 
G. AMOUNT OF FILING FEE: $500 (as required by Rule 24f-2)
 
H. APPROXIMATE DATE OF PROPOSED SALE TO PUBLIC:
 
 As soon as practicable after the effective date of the Registration Statement.
 
THIS REGISTRATION STATEMENT SHALL HEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR ON SUCH DATE AS THE COMMISSIONER,
ACTING PURSUANT TO SAID SECTION 8(A), MAY DETERMINE.
 
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<PAGE>
Defined
Asset FundsSM
 

   
MUNICIPAL INVESTMENT          This Defined Fund is a portfolio of preselected
TRUST FUND                    securities formed for the purpose of providing
- ------------------------------interest income which in the opinion of counsel
Monthly Payment Series--555   is, with certain exceptions,exempt from regular
A Unit Investment Trust       Federal income taxes under existing law through
12,000 Units                  investment in a fixed portfolio consisting
/ / Tax-Free                  primarily of long-term state, municipal and public
/ /  Diversified              authority Debt Obligations. The value of the Units
/ / Investment Grade          of the Fund will fluctuate with the value of the
6.02%                         Portfolio of underlying securities.
Estimated Current Return      The Estimated Current Return and Estimated Long
6.07%                         Term Return figures shown give different
Estimated Long Term Return    information about the return to investors.
as of February 22, 1995       Estimated Current Return on a Unit shows a net
                              annual current cash return based on the initial
                              Public Offering Price and the maximum applicable
                              sales charge and is computed by multiplying the
                              estimated net annual interest rate per Unit by
                              $1,000 and dividing the result by the Public
                              Offering Price per Unit (including the sales
                              charge but not including accrued interest).
                              Estimated Long Term Return shows a net annual
                              long-term return to investors holding to maturity
                              based on the yield on the individual bonds in the
                              Portfolio, weighted to reflect the time to
                              maturity (or in certain cases to an earlier call
                              date) and market value of each bond in the
                              Portfolio, adjusted to reflect the Public Offering
                              Price (including the sales charge) and estimated
                              expenses. Unlike Estimated Current Return,
                              Estimated Long Term Return takes into account
                              maturities of the underlying Securities and
                              discounts and premiums. Distributions of income on
                              Units are generally subject to certain delays; if
                              the Estimated Long Term Return figure shown took
                              these delays into account, it would be lower. Both
                              Estimated Current Return and Estimated Long Term
                              Return are subject to fluctuations with changes in
                              Portfolio composition (including the redemption,
                              sale or other disposition of Securities in the
                              Portfolio), changes in the market value of the
                              underlying Securities and changes in fees and
                              expenses. Estimated cash flows for the Fund are
                              available upon request from the Sponsors at no
                              charge.
                              Minimum purchase: 1 Unit.
                               -------------------------------------------------
                               THESE SECURITIES HAVE NOT BEEN APPROVED OR
                               DISAPPROVED BY THE SECURITIES AND EXCHANGE
                               COMMISSION OR ANY STATE SECURITIES COMMISSION NOR
SPONSORS:                      HAS THE COMMISSION OR ANY STATE SECURITIES
Merrill Lynch,                 COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
Pierce, Fenner & Smith         OF THIS PROSPECTUS. ANY REPRESENTATION TO THE
Incorporated                   CONTRARY IS A CRIMINAL OFFENSE.
Smith Barney Inc.              Inquiries should be directed to the Trustee at
PaineWebber Incorporated       1-800-323-1508.
Prudential Securities          Prospectus dated February 23, 1995.
Incorporated                   READ AND RETAIN THIS PROSPECTUS FOR FUTURE
Dean Witter Reynolds Inc.      REFERENCE.
    

 
<PAGE>
- --------------------------------------------------------------------------------
 
   DEFINED ASSET FUNDSSM is America's oldest and largest family of unit
   investment trusts, with over $95 billion sponsored since 1971. Each Defined
   Fund is a portfolio of preselected securities. The portfolio is divided into
   'units' representing equal shares of the underlying assets. Each unit
   receives an equal share of income and principal distributions.
 
   With Defined Asset Funds you know in advance what you are investing in and
   that changes in the portfolio are limited. Most defined bond funds pay
   interest monthly and repay principal as bonds are called, redeemed, sold or
   as they mature. Defined equity funds offer preselected stock portfolios with
   defined termination dates.
 
   Your financial advisor can help you select a Defined Fund to meet your
   personal investment objectives. Our size and market presence enable us to
   offer a wide variety of investments. Defined Funds are available in the
   following types of securities: municipal bonds, corporate bonds, government
   bonds, utility stocks, growth stocks, even international securities
   denominated in foreign currencies.
 
   Termination dates are as short as one year or as long as 30 years. Special
   funds are available for investors seeking extra features: insured funds,
   double and triple tax-free funds, and funds with 'laddered maturities' to
   help protect against rising interest rates. Defined Funds are offered by
   prospectus only.
 
- -----------------------------------------------------------------------------
   CONTENTS
   Investment Summary.......................................                 A-3
   Tax-Free vs. Taxable Income..............................                 A-5
   Underwriting Account.....................................                 A-6
   Fee Table................................................                 A-7
   Report of Independent Accountants........................                 A-8
   Statement of Condition...................................                 A-8
   Portfolio................................................                 A-9
   Description of Fund Investments..........................                   1
   Risk Factors.............................................                   2
   How To Buy...............................................                  17
   How To Sell..............................................                  18
   Income and Distributions.................................                  19
   Exchange Option..........................................                  22
   Taxes....................................................                  23
   Administration of the Fund...............................                  25
   Trust Indenture..........................................                  25
   Miscellaneous............................................                  26
   Appendix A...............................................                 A-1
   Appendix B...............................................                 B-1
   Appendix C...............................................                 C-1

 
                                      A-2
 
<PAGE>
   
INVESTMENT SUMMARY AS OF FEBRUARY 22, 1995 (THE BUSINESS DAY PRIOR TO THE
INITIAL DATE OF DEPOSIT)(a)

ESTIMATED CURRENT RETURN(b)
(based on Public Offering Price)                                       6.02%
ESTIMATED LONG TERM RETURN(b)
(based on Public Offering Price)                                       6.07%
PUBLIC OFFERING PRICE PER UNIT
(including 4.50% sales charge)                              $         984.45(c)
FACE AMOUNT OF SECURITIES--                                 $     12,000,000
NUMBER OF UNITS--                                                     12,000
SPONSORS' REPURCHASE PRICE AND
REDEMPTION PRICE PER UNIT(d)
(based on bid side evaluation)                              $         936.15(c)
FRACTIONAL UNDIVIDED INTEREST IN FUND REPRESENTED BY EACH
UNIT--                                                              1/12,000TH
CALCULATION OF PUBLIC OFFERING PRICE
  Aggregate offer side evaluation of Securities in Fund.....$  11,281,823.25
                                                            ----------------
  Divided by 12,000 Units...................................$         940.15
  Plus sales charge of 4.50% of Public Offering Price
    (4.712% of net amount invested in Securities)(e)                   44.30
                                                            ----------------
  Public Offering Price per Unit............................          984.45
  Plus accrued interest(f)..................................            1.48
                                                            ----------------
    Total...................................................$         985.93
                                                            ----------------
                                                            ----------------
PREMIUM AND DISCOUNT ISSUES IN PORTFOLIO
  Face amount of Securities with offer side evaluation:
                                                               over par--29%
                                                 at a discount from par--71%
PERCENTAGE OF AGGREGATE FACE AMOUNT OF DEBT OBLIGATIONS
  ISSUED AT 'ORIGINAL ISSUE DISCOUNT' (see Taxes)...........             68%
CALCULATION OF ESTIMATED NET ANNUAL INTEREST RATE PER UNIT
  (based on face amount of $1,000 per Unit)
  Annual interest rate per Unit.............................          6.083%
  Less estimated annual expenses per Unit ($1.55) expressed
    as a percentage.........................................           .155%
                                                            ----------------
  Estimated net annual interest rate per Unit...............          5.928%
                                                            ----------------
                                                            ----------------
DAILY RATE AT WHICH ESTIMATED NET INTEREST ACCRUES PER
    UNIT--                                                            .0164%
MONTHLY INCOME DISTRIBUTIONS
  First distribution to be paid on the 25th day of May, 1995
  to Holders of record on the 10th day of May, 1995.........$           2.46
  Calculation of second and following distributions:
    Estimated net annual interest rate per Unit times
    $1,000..................................................$          59.28
    Divided by 12...........................................$           4.94
REDEMPTION PRICE PER UNIT LESS THAN:
  Public Offering Price by..................................$          48.30
  Sponsors' Initial Repurchase Price by.....................$           4.00
RECORD DAY--The 10th day of each month
DISTRIBUTION DAY--The 25th day of each month
MINIMUM CAPITAL DISTRIBUTION
    No distribution need be made from Capital Account if
    balance is less than $5.00 per Unit
SPONSORS' PROFIT (LOSS) ON DEPOSIT ............................. $137,750.75
TRUSTEE'S ANNUAL FEE AND EXPENSES(g)
    $1.55 per Unit commencing February, 1995 (see
    Income and Distributions--Fund Expenses)
PORTFOLIO SUPERVISION FEE(h)
    Maximum of $0.35 per $1,000 face amount of underlying
    Debt Obligations (see Income and Distributions--Fund
    Expenses)
EVALUATOR'S FEE FOR EACH EVALUATION
    Minimum of $5.00 (see Income and Distributions-- Fund
    Expenses)
EVALUATION TIME
    3:30 P.M. New York Time
MANDATORY TERMINATION DATE
    Trust must be terminated no later than one year after
    the maturity date of the last maturing Debt Obligation
    listed under Portfolio (see Portfolio).
MINIMUM VALUE OF FUND
    Trust may be terminated if value of Fund is less than
    40% of the face amount of Securities in the Portfolio on
    the dates of their deposit.
    

- ------------------
      (a) The Indenture was signed and the deposit was made on the date of this
Prospectus.
      (b) Estimated Current Return represents annual interest income after
estimated annual expenses divided by the maximum public offering price including
a 4.50% maximum sales charge. Estimated Long Term Return is the net annual
percentage return based on the yield on each underlying Debt Obligation weighted
to reflect market value and time to maturity or earlier call date. Estimated
Long Term Return is adjusted for estimated expenses and the maximum offering
price but not for delays in the Fund's distribution of income. Estimated Current
Return shows current annual cash return to investors while Estimated Long Term
Return shows the return on Units held to maturity, reflecting maturities,
discounts and premiums on underlying Debt Obligations. Each figure will vary
with purchase price and changes in Fund income after expenses.
      (c) Plus accrued interest.
      (d) During the initial offering period, the Fund's Sponsors intend to
offer to purchase Units at prices based on the offer side value of the
underlying Securities. Thereafter, the Sponsors intend to maintain such a market
based on the bid side value of the underlying Securities, which will be equal to
the Redemption Price. (See How To Sell.)
      (e) The sales charge during the initial offering period and in the
secondary market will be reduced on a graduated scale in the case of purchases
of 250 or more Units; the secondary market sales charge will also vary depending
on the maturities of the underlying Securities (see Appendix B). Any resulting
reduction in the Public Offering Price will increase the effective current and
long term returns on a Unit.
      (f) Figure shown represents interest accrued on underlying Securities from
the Initial Date of Deposit to expected date of settlement (normally five
business days after purchase) for Units purchased on the Initial Date of Deposit
(see How To Buy--Accrued Interest).
      (g) In the event that any Debt Obligations have a delayed delivery, the
Trustee's Annual Fee and Expenses will be reduced over a period in the amount of
interest that would have accrued on the Debt Obligations between the date of
settlement for the Units and the actual date of delivery of the Debt
Obligations. The Trustee will be reimbursed for this reduction (see Income and
Distributions--Income).
      (h) The Sponsors may also be reimbursed for bookkeeping or other
administrative expenses not exceeding their actual costs currently at a maximum
annual rate of $0.10 per Unit.
 
                                      A-3
<PAGE>
   
INVESTMENT SUMMARY AS OF FEBRUARY 22, 1995 (CONTINUED)
 
     OBJECTIVE OF THE FUND--To provide tax exempt income through investment in a
fixed portfolio consisting primarily of long-term state, municipal and public
authority Debt Obligations. There is no assurance that this objective will be
met because it is subject to the continuing ability of the issuers of the Debt
Obligations held by the Fund to meet their principal and interest requirements.
Furthermore, the market value of the underlying Debt Obligations, and therefore
the value of the Units, will fluctuate with changes in interest rates and other
factors.
 
     PORTFOLIO AT A GLANCE--
 
     DIVERSIFICATION--The Portfolio is diversified among 17 issues. Spreading
the investment among different securities and issuers reduces risk, but does not
eliminate it. Because of possible maturity, sale or other disposition of
Securities, the size, composition, and return of the Portfolio may change at any
time.
 
     INVESTMENT QUALITY--All of the issues are investment grade. Standard &
Poor's Ratings Group, a division of McGraw-Hill, Inc. ('Standard & Poor's')
rated 1 issue AAA, 3 issues AA and 6 issues A. Moody's Investors Service
('Moody's') rated 1 issue Aa and 6 issues A. (See Appendix A.)
 
     CALL PROTECTION--Issuers are usually able to redeem bonds under optional
refunding and sinking fund provisions. Optional refunding redemptions, which may
redeem all or part of an issue, are in most cases initially at a premium, and
then in subsequent years at declining prices, but typically not below par value.
Approximately 100% of the Debt Obligations are subject to optional refunding
redemptions, but not before 2002, and then at prices initially not less than
100% of par (see Portfolio). Bonds are also generally subject to mandatory
sinking fund redemptions at par over the life of the issue and may also provide
for redemption at par prior to optional or mandatory redemption dates or
maturity, for example, if proceeds are not able to be used as contemplated, the
project is condemned or sold or the project is destroyed and insurance proceeds
are used to redeem the bonds.
 
     DEBT OBLIGATIONS--The issues have maturity dates ranging from 2012 to 2033.
All issues are payable from the income of a specific project or authority and
can be divided by source of revenue as follows: Hospitals/Health Care
Facilities, 6; Housing, 3; State/Local Municipal Utilities, 1; Industrial
Development Revenue, 3; Lease Rental, 1; Universities/Colleges, 2 and
Miscellaneous, 1.
 
     RISK FACTORS--Investment in the Fund should be made with an understanding
that the value of the underlying Portfolio may decline with increases in
interest rates. In recent years, there have been wide fluctuations in interest
rates and thus in the value of fixed-rate, long-term debt obligations generally.
The Sponsors cannot predict whether these fluctuations will continue in the
future. In addition, approximately 38% of the aggregate face amount of the
Portfolio consists of Hospital/Health Care Facility issues.* (See Risk Factors
for a brief summary of certain investment risks pertaining to the obligations
held by the Fund.)
 
     The Securities are generally not listed on a national securities exchange.
Whether or not the Securities are listed, the principal trading market for the
Securities will generally be in the over-the-counter market. As a result, the
existence of a liquid trading market for the Securities may depend on whether
dealers will make a market in the Securities. There can be no assurance that a
market will be made for any of the Securities, that any market for the
Securities will be maintained or of the liquidity of the Securities in any
markets made. In addition, the Fund may be restricted under the Investment
Company Act of 1940 from selling Securities to any Sponsor. The price at which
the Securities may be sold to meet redemptions and the value of the Fund will be
adversely affected if trading markets for the Securities are limited or absent.
 
     MONTHLY DISTRIBUTIONS--Monthly distributions of interest and any principal
or premium received by the Fund will be made in cash on or shortly after the
25th day of each month to Holders of record on the 10th day of such month
commencing with the first distribution on the date indicated on page A-3 (see
Income and Distributions). Alternatively, Holders may elect to have their
distributions reinvested in the Municipal Fund Accumulation Program, Inc.
Further information about the program, including a current prospectus, may be
obtained by returning the enclosed form. (See Income and
Distributions--Investment Accumulation Program.)
 
     MARKET FOR UNITS--The Sponsors, though not obligated to do so, intend to
maintain a secondary market for Units based on the aggregate bid side evaluation
of the underlying Securities. If this market is not maintained a Holder will be
able to dispose of his Units through redemption at prices also based on the
aggregate bid side evaluation of the underlying Securities. There is no fee for
selling Units. Market conditions may cause the prices available in the market
maintained by the Sponsors or available upon exercise of redemption rights to be
more or less than the total of the amount paid for Units plus accrued interest.
(See How To Buy; How To Sell.)
 
     TAXATION--In the opinion of special counsel to the Sponsors, each Holder
will be considered to have received the interest on his pro rata portion of each
Debt Obligation when interest on the Debt Obligation is received by the Fund. In
the opinion of bond counsel rendered on the date of issuance of the Debt
Obligation, this interest isexempt under existing law from regular Federal 
income taxes (except in certain circumstances depending on the Holder) but may 
be subject to state and local taxes. Any gain on the disposition of a Holder's 
pro rata portion of a Debt Obligation will be subject to tax. (See Taxes.)
    
 
- ---------------
 
      * A Fund is considered to be 'concentrated' in a particular category when
the debt obligations in that category constitute 25% or more of the aggregate
face amount of the Portfolio. (See Risk Factors.)
 
                                      A-4
<PAGE>
 
                                   Defined
                                   Asset Funds

INVESTOR'S GUIDE              DEFINED MUNICIPAL INVESTMENT TRUST FUNDS
MUNICIPAL INVESTMENT          Our defined portfolios of municipal bonds offer
TRUST FUND                    investors a simple and convenient way to earn
- ------------------------------monthly income. And by purchasing Defined Funds,
MONTHLY PAYMENT SERIES        investors not only avoid the problem of selecting
                              municipal bonds by themselves, but also gain the
                              advantage of a higher degree of safety by
                              investing in bonds of several different issuers.
                              MONTHLY TAX-FREE INTEREST INCOME
                              The Fund pays monthly income, even though the
                              underlying bonds pay interest semi-annually. This
                              income is generally 100% exempt under existing
                              laws from regular federal income tax. Depending on
                              where you live, some of the income also may be
                              exempt from certain state and local personal
                              income taxes. Any gain on disposition of the
                              underlying bonds will be subject to tax.
                              REINVESTMENT OPTION
                              You can elect to automatically reinvest your
                              distributions into a separate portfolio of
                              tax-exempt bonds. Reinvesting helps to compound
                              your income tax-free.
                              A-RATED INVESTMENT QUALITY
                              Each bond in the Fund has been selected by
                              investment professionals among available bonds
                              rated A or better by at least one national rating
                              organization or has, in the opinion of Defined
                              Asset Funds research analysts, comparable credit
                              characteristics. Bonds with these 'investment
                              grade' ratings are judged to have a strong
                              capacity to pay interest and repay principal.
                              PROFESSIONAL SELECTION AND SUPERVISION
                              The Fund contains a variety of securities selected
                              by experienced buyers and market analysts.
                              Spreading your investment among different
                              securities and issuers reduces your risk, but does
                              not eliminate it. The Fund is not actively
                              managed. However, the portfolio is regularly
                              reviewed and a security can be sold if retaining
                              it could be detrimental to investors' interest.
                              A LIQUID INVESTMENT
                              Although not legally required to do so, the
                              Sponsors have maintained a secondary market for
                              Defined Asset Funds for over 20 years. You can
                              cash in your units at any time. Your price is
                              based on the market value of bonds in the Fund's
                              portfolio at that time as determined by an
                              independent evaluator. Or, you can exchange your
                              investment for another Defined Fund at a reduced
                              sales charge. There is never a fee for cashing in
                              your investment.
                              PRINCIPAL DISTRIBUTIONS
                              Principal from sales, redemptions and maturities
                              of bonds in the fund is distributed to investors
                              periodically.
                              RISK FACTORS
                              Unit price fluctuates and is affected by interest
                              rates as well as the financial condition of the
                              issuers of the bonds.

 
THIS PAGE MAY NOT BE DISTRIBUTED UNLESS INCLUDED IN A CURRENT PROSPECTUS.
INVESTORS SHOULD REFER TO THE PROSPECTUS FOR FURTHER INFORMATION.
 
<PAGE>
                          TAX-FREE VS. TAXABLE INCOME
                  A COMPARISON OF TAXABLE AND TAX-FREE YIELDS
 
<TABLE><CAPTION>

TAXABLE INCOME 1995*                       % TAX                               TAX-FREE YIELD OF
  SINGLE RETURN        JOINT RETURN       BRACKET       3%         3.5%         4%         4.5%         5%         5.5%
                                                                      IS EQUIVALENT TO A TAXABLE YIELD OF
- ---------------------------------------------------------------------------------------------------------------------------
<S>                 <C>                      <C>          <C>         <C>         <C>         <C>         <C>         <C> 
$      0- 23,350    $      0- 39,000         15.00        3.53        4.12        4.71        5.29        5.88        6.47
- ---------------------------------------------------------------------------------------------------------------------------
$ 23,350- 56,550    $ 39,000- 94,250         28.00        4.17        4.86        5.56        6.25        6.94        7.64
- ---------------------------------------------------------------------------------------------------------------------------
$ 56,550-117,950    $ 94,250-143,600         31.00        4.35        5.07        5.80        6.52        7.25        7.97
- ---------------------------------------------------------------------------------------------------------------------------
$117,950-256,500    $143,600-256,500         36.00        4.69        5.47        6.25        7.03        7.81        8.59
- ---------------------------------------------------------------------------------------------------------------------------
OVER $256,500       OVER $256,500            39.60        4.97        5.79        6.62        7.45        8.28        9.11
- ---------------------------------------------------------------------------------------------------------------------------
</TABLE>

TAXABLE INCOME 1995*
  SINGLE RETURN        6%         6.5%         7%
 
- ------------------
$      0- 23,350         7.06        7.65        8.24
- ------------------
$ 23,350- 56,550         8.33        9.03        9.72
- ------------------
$ 56,550-117,950         8.70        9.42       10.14
- ------------------
$117,950-256,500         9.38       10.16       10.94
- ------------------
OVER $256,500            9.93       10.76       11.59
- ------------------

 
       To compare the yield of a taxable security with the yield of a
       tax-free security, find your taxable income and read across. The
       table incorporates projected 1995 federal income tax rates and
       assumes that all income would otherwise be taxed at the investor's
       highest tax rate. Yield figures are for example only.
 
       *Based upon net amount subject to federal income tax after
       deductions and exemptions. This table does not reflect the
       possible effect of other tax factors, such as alternative minimum
       tax, personal exemptions, the phase out of exemptions, itemized
       deductions or the possible partial disallowance of deductions.
       Consequently, holders are urged to consult their own tax advisers
       in this regard.
 
                                      A-5
<PAGE>
                        MUNICIPAL INVESTMENT TRUST FUND
                             MONTHLY PAYMENT SERIES
                              DEFINED ASSET FUNDS
I want to learn more about automatic reinvestment in the Investment Accumulation
Program. Please send me information about participation in the Municipal Fund
Accumulation Program, Inc. and a current Prospectus.
My name (please
print) _________________________________________________________________________
My address (please
print): ________________________________________________________________________
City, State, Zip
Code ___________________________________________________________________________
This page is a self-mailer. Please complete the information above, cut along the
dotted line, fold along the lines on the reverse side, tape, and mail with the
Trustee's address displayed on the outside.
12345678
<PAGE>
 
   
BUSINESS REPLY MAIL                                              NO POSTAGE
FIRST CLASS     PERMIT NO. 644     NEW YORK, NY                  NECESSARY
                                                                 IF MAILED
POSTAGE WILL BE PAID BY ADDRESSEE                                  IN THE
          THE CHASE MANHATTAN BANK, N.A.                       UNITED STATES
          UNIT TRUST DEPARTMENT
          BOX 2051
          NEW YORK, NY 10081
    
- --------------------------------------------------------------------------------
                            (Fold along this line.)
 
- --------------------------------------------------------------------------------
                            (Fold along this line.)
<PAGE>
   
INVESTMENT SUMMARY AS OF FEBRUARY 22, 1995 (CONTINUED)
    
 
     PUBLIC OFFERING PRICE--During the initial offering period and any offering
of additional Units, the Public Offering Price of the Units is based on the
aggregate offer side evaluation of the underlying Securities in the Fund (the
price at which they could be directly purchased by the public assuming they were
available), divided by the number of Units outstanding plus a sales charge of
4.712%* of the offer side evaluation per Unit (the net amount invested); this
results in a sales charge of 4.50%* of the Public Offering Price. For secondary
market sales charges, see Appendix B. Units are offered at the Public Offering
Price computed as of the Evaluation Time for all sales made subsequent to the
previous evaluation, plus cash per Unit in the Capital Account not allocated to
the purchase of specific Securities and net interest accrued. The Public
Offering Price on the Initial Date of Deposit, and on subsequent dates, will
vary from the Public Offering Price set forth on page A-3. (See How To Buy; How
To Sell.)
 
     ESTIMATED CURRENT RETURN; ESTIMATED LONG TERM RETURN--Estimated Return on a
Unit shows the return based on the initial Public Offering Price and the maximum
applicable sales charge of 4.50%* and is computed by multiplying the estimated
net annual interest rate per Unit (which shows the return per Unit based on
$1,000 face amount per Unit) by $1,000 and dividing the result by the Public
Offering Price per Unit (not including accrued interest). Estimated Long Term
Return on a Unit shows a net annual long-term return to investors holding to
maturity based on the individual Debt Obligations in the Portfolio weighted to
reflect the time to maturity (or in certain cases to an earlier call date) and
market value of each Debt Obligation in the Portfolio, adjusted to reflect the
Public Offering Price (including the maximum applicable sales charge of 4.50%*)
and estimated expenses. The net annual interest rate per Unit and the net annual
long-term return to investors will vary with changes in the fees and expenses of
the Trustee and the Sponsors and the fees of the Evaluator, which are paid by
the Fund, and with the exchange, redemption, sale or maturity of the underlying
Securities; the Public Offering Price will vary with any reduction in sales
charges paid in the case of purchases of 250 or more Units, as well as with
fluctuations in the offer side evaluation of the underlying Securities.
Therefore, it can be expected that the current return and long term return will
fluctuate in the future. (See Income and Distributions--Returns.)
 
     UNDERWRITING--None of the Sponsors has participated as sole underwriter,
managing underwriter or member of an underwriting syndicate from which any of
the Debt Obligations in the Portfolio were acquired. None of the Sponsors has
acted as agent in the direct placement of any of the Debt Obligations.
 
   
                              UNDERWRITING ACCOUNT
 
     The names and addresses of the Underwriters and their several interests in
the Underwriting Account are:
 
<TABLE>
<S>                                          <C>                                                               <C>
Merrill Lynch, Pierce, Fenner & Smith        P.O. Box 9051, Princeton, N.J. 08543-9051                         66.67%
Incorporated
 
Smith Barney Inc.                            388 Greenwich St.--23rd Floor, New York, N.Y. 10013                8.33
 
PaineWebber Incorporated                     1285 Avenue of the Americas, New York, N.Y. 10019                 12.50
 
Prudential Securities Incorporated           One Seaport Plaza--199 Water Street, New York, N.Y. 10292          6.25
 
Dean Witter Reynolds Inc.                    Two World Trade Center--59th Floor, New York, N.Y. 10048           6.25
                                                                                                              ------
                                                                                                              100.00%
                                                                                                              ------
                                                                                                              ------
    
</TABLE>
- ---------------
* This sales charge during the initial offering period and in the secondary
market will be reduced on a graduated scale in the case of purchases of 250 or
more Units (see Appendix B).
 
                                      A-6
<PAGE>
INVESTMENT SUMMARY AS OF FEBRUARY 22, 1995 (CONTINUED)
                                   FEE TABLE
 
     THIS FEE TABLE IS INTENDED TO ASSIST INVESTORS IN UNDERSTANDING THE COSTS
AND EXPENSES THAT AN INVESTOR IN THE FUND WILL BEAR DIRECTLY OR INDIRECTLY. SEE
HOW TO BUY AND INCOME AND DISTRIBUTIONS--FUND EXPENSES. ALTHOUGH THE FUND IS A
UNIT INVESTMENT TRUST RATHER THAN A MUTUAL FUND, THIS INFORMATION IS PRESENTED
TO PERMIT A COMPARISON OF FEES.
 
<TABLE><CAPTION>

UNITHOLDER TRANSACTION EXPENSES
<S>                                                                                                                        <C>
  Maximum Sales Charge Imposed on Purchases during the Initial Offering Period (as a percentage
     of Public Offering Price).......................................................................................      4.50%
  Maximum Sales Charge Imposed on Purchases during the Secondary Offering Period (as a percentage of Public Offering
     Price)..........................................................................................................      5.50%
                                                                                                                       ---------
ESTIMATED ANNUAL FUND OPERATING EXPENSES
  (AS A PERCENTAGE OF AVERAGE NET ASSETS1)
  Trustee's Fee......................................................................................................      .074%
  Portfolio Supervision, Bookkeeping and Administrative Fees.........................................................      .043%
  Other Operating Expenses...........................................................................................      .048%
                                                                                                                       ---------
     Total...........................................................................................................      .165%
                                                                                                                       ---------
                                                                                                                       ---------
</TABLE>
- ------------------
1Based on the mean of the bid and offer side evaluations; this figure may differ
from that set forth as estimated annual expenses per Unit expressed as a
percentage on p. A-3.
 
                                    EXAMPLE
   
<TABLE><CAPTION>
                                                                                CUMULATIVE EXPENSES PAID FOR PERIOD OF:
                                                                               -----------------------------------------
                                                                                1 YEAR    3 YEARS     5 YEARS     10 YEARS
                                                                               --------  ----------  ----------   ---------
<S>                                                                             <C>      <C>         <C>          <C>
  An investor would pay the following expenses on a $1,000 investment,
     assuming the Fund's estimated operating expense ratio of .165% and a 5%
     annual return on the investment throughout the periods..................   $  47     $  50      $   54         $  65
    
</TABLE>
 
The Example assumes reinvestment of all distributions into additional units of
the Fund (a reinvestment option different from that offered by this Fund--see
Income and Distributions--Investment Accumulation Program) and utilizes a 5%
annual rate of return as mandated by Securities and Exchange Commission
regulations applicable to mutual funds. Cumulative Expenses above reflect both
sales charges and operating expenses on an increasing investment (because the
net annual return is reinvested.) In addition to the charges described above, a
Holder selling or redeeming his Units in the secondary market (before the Fund
terminates) will receive a price based on the then-current bid side evaluation
of the underlying securities. The difference between this bid side evaluation
and the offer side evaluation (the basis for the Public Offering Price), as of
the day before the Initial Date of Deposit, is $4.00 per Unit. Of course, this
difference may change over time. The Example should not be considered a
representation of past or future expenses or annual rate of return; the actual
expenses and annual rate of return may be more or less than those assumed for
purposes of the Example.
 
                                      A-7
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS
   

The Sponsors, Trustee and Holders of Municipal Investment Trust Fund, Monthly
Payment Series--555, Defined Asset Funds:
 
We have audited the accompanying statement of condition, including the
portfolio, of Municipal Investment Trust Fund, Monthly Payment Series--555,
Defined Asset Funds as of February 23, 1995. This financial statement is the
responsibility of the Trustee. Our responsibility is to express an opinion on
this financial statement based on our audit.
 
We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statement is free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statement. The deposit on February
23, 1995 of securities and an irrevocable letter or letters of credit for the
purchase of securities, as described in the statement of condition, was
confirmed to us by The Chase Manhattan Bank, N.A., the Trustee. An audit also
includes assessing the accounting principles used and significant estimates made
by the Trustee, as well as evaluating the overall financial statement
presentation. We believe that our audit provides a reasonable basis for our
opinion.
 
In our opinion, the financial statement referred to above presents fairly, in
all material respects, the financial position of Municipal Investment Trust
Fund, Monthly Payment Series--555, Defined Asset Funds at February 23, 1995 in
conformity with generally accepted accounting principles.
 
DELOITTE & TOUCHE LLP
New York, N.Y.
February 23, 1995
 
                        MUNICIPAL INVESTMENT TRUST FUND
                          MONTHLY PAYMENT SERIES--555
                              DEFINED ASSET FUNDS
    STATEMENT OF CONDITION AS OF INITIAL DATE OF DEPOSIT, FEBRUARY 23, 1995
 

TRUST PROPERTY
Investment in Debt Obligations(1):
          Debt Obligations deposited in
the Trust...............................$         939,396.00
          Contracts to purchase Debt
          Obligations...................       10,342,427.25$      11,281,823.25
                                        --------------------
Accrued interest to Initial Date of
     Deposit on underlying Debt
     Obligations........................                              187,111.40
                                                            --------------------
            Total.......................                    $      11,468,934.65
                                                            --------------------
                                                            --------------------
LIABILITY AND INTEREST OF HOLDERS
Liability--Accrued interest to Initial
     Date of Deposit on underlying Debt
     Obligations(2).....................                    $         187,111.40
Interest of Holders--
     12,000 Units of fractional
     undivided interest outstanding:
       Cost to investors(3).............$      11,813,423.25
       Gross underwriting
       commissions(4)...................         (531,600.00)
                                        --------------------
Net amount applicable to investors......                           11,281,823.25
                                                            --------------------
            Total.......................                    $      11,468,934.65
                                                            --------------------
                                                            --------------------
- ------------------
 
(1) Aggregate cost to the Fund of the Debt Obligations listed under Portfolio is
    based upon the offer side evaluation determined by the Evaluator at the
    Evaluation Time on the business day prior to the Initial Date of Deposit as
    set forth under How To Buy. See also the column headed Cost of Debt
    Obligations to Fund under Portfolio. An irrevocable letter or letters of
    credit in the amount of $10,413,984.87 have been deposited with the Trustee.
    The amount of such letter or letters of credit includes $10,232,703.00
    (equal to the purchase price to the Sponsors) for the purchase of
    $11,050,000 face amount of Debt Obligations in connection with contracts to
    purchase Debt Obligations, plus $181,281.87 covering accrued interest to the
    earlier of the date of settlement for the purchase of Units or the date of
    delivery of the Debt Obligations. The letter or letters of credit have been
    issued by The Sakura Bank, Limited, New York Branch.
 
(2) Representing, as set forth under How To Buy--Accrued Interest, a special
    distribution by the Trustee of an amount equal to accrued interest as of the
    Initial Date of Deposit.
    
(3) Aggregate public offering price (exclusive of interest) computed on the
    basis of the offering side evaluation of the underlying Debt Obligations as
    of the Evaluation Time on the Business Day prior to the Initial Date of
    Deposit.
 
(4) Assumes a sales charge of 4.50% on all Units computed on the basis set forth
    under How To Buy.
 
                                      A-8

<PAGE>
   
PORTFOLIO OF MUNICIPAL INVESTMENT TRUST FUND,    ON THE INITIAL DATE OF DEPOSIT,
MONTHLY PAYMENT SERIES--555                                    FEBRUARY 23, 1995
DEFINED ASSET FUNDS
 
<TABLE><CAPTION>
                                                                                                                     OPTIONAL
                    PORTFOLIO NO. AND TITLE OF            RATINGS OF        FACE                                     REFUNDING
                  DEBT OBLIGATIONS CONTRACTED FOR         ISSUES (1)       AMOUNT       COUPON     MATURITIES      REDEMPTIONS(2)
           ---------------------------------------------  -----------  ---------------  ---------  -----------  --------------------
       <S>                                                <C>          <C>              <C>        <C>          <C>                
       1)  Alaska Hsg. Fin. Corp., Ins. Mtge. Prog.               A+   $       750,000     5.90%     12/1/33           12/1/03 @ 102
                Bonds, 1993 First Ser.
       2)  City of Valdez, AK, Marine Terminal Rev.              AA-           750,000     5.65      12/1/28           12/1/03 @ 102
                Rfdg. Bonds (BP Pipelines (AK) Inc.
                Proj.), Ser. 1993 C
       3)  State Pub. Wks. Bd. of the State of                    A-           750,000     7.00      3/1/19             3/1/04 @ 102
                California, Lse. Rev. Bonds (CA Comm.
                Colleges), 1994 Ser. B (Various Comm.
                College Projects)
       4)  District of Columbia Univ. Rev. Bonds (The             A+           250,000     5.375     4/1/23             4/1/03 @ 102
                Georgetown Univ. Iss.), Ser. 1993
       5)  Illinois Dev. Fin. Auth. Poll. Ctl. Rfdg.           A2(m)           750,000     6.75      5/1/16             5/1/02 @ 102
                Rev. Bonds (CPC Intl. Inc. Proj.), Ser.
                1992
       6)  Illinois Hlth. Fac. Auth. Rev. Bonds, Ser.             A+           750,000     6.00     11/15/23          11/15/03 @ 102
                1993 (OSF Healthcare Sys.)
       7)  Illinois Hlth. Fac. Auth. Rev. Bonds and Rev.         AA-           900,000     6.25      4/15/22           4/15/02 @ 102
                Rfdg. Bonds (Evangelical Hospitals
                Corp.)
       8)  Indiana Hlth. Fac. Financing Auth. Hosp. Rev.        A(m)           725,000     7.00      10/1/12            4/1/02 @ 102
                Ref. Bonds, Ser. 1992 A (St. Anthony
                Med. Ctr. Inc.)
       9)  City of Petersburg, Indiana, Poll. Ctl. Rfdg.   Aa2(m)              550,000     6.625     12/1/24           12/1/04 @ 102
                Rev. Bonds, Ser. 1995 A (Indianapolis
                Pwr. & Lt. Co. Proj.)

</TABLE>
 
                                                    YIELD TO
              SINKING            COST OF            MATURITY
                FUND              DEBT          ON INITIAL DATE
            REDEMPTIONS        OBLIGATIONS                OF
                (2)            TO FUND (3)       DEPOSIT (3)
           --------------  -------------------  ---------------
       1)     12/1/24      $        696,412.50         6.400%
 
       2)          --               667,792.50         6.450
 
       3)      3/1/15               785,182.50         6.400+
 
       4)      4/1/14               211,057.50         6.600
 
       5)          --               757,560.00         6.600+
 
       6)     11/15/14              687,787.50         6.650
 
       7)     4/15/18               860,364.00         6.600
 
       8)     10/1/07               744,546.00         6.600+
 
       9)          --               560,054.00         6.400+
    
 
                                      A-9
<PAGE>
   
PORTFOLIO OF MUNICIPAL INVESTMENT TRUST FUND,    ON THE INITIAL DATE OF DEPOSIT,
MONTHLY PAYMENT SERIES--555                                    FEBRUARY 23, 1995
DEFINED ASSET FUNDS                                                  (continued)
 
<TABLE><CAPTION>
                                                                                                                      OPTIONAL
                    PORTFOLIO NO. AND TITLE OF            RATINGS OF        FACE                                     REFUNDING
                  DEBT OBLIGATIONS CONTRACTED FOR         ISSUES (1)       AMOUNT       COUPON     MATURITIES      REDEMPTIONS(2)
           ---------------------------------------------  -----------  ---------------  ---------  -----------  --------------------
       <S>                                                <C>          <C>              <C>        <C>          <C>                
      10)  Maine State Hsg. Auth. Mtge. Purchase Bonds,          AA-   $       900,000     5.70%    11/15/26            2/1/04 @ 102
                1994 Ser. A
      11)  Prince George's Cnty., MD, Proj. and Ref.            A(m)           500,000     5.30      7/1/24             7/1/04 @ 102
                Rev. Bonds (Dimensions Hlth. Corp.
                Iss.), Ser. 1994
      12)  Medical Ctr. Educl. Bldg. Corp., MS, Rev.              A-           250,000     5.80      12/1/14           12/1/04 @ 102
                Bonds, Ser. 1993 (Univ. of Mississippi
                Med. Ctr. Proj.)
      13)  North Carolina Muni. Pwr. Agy. Number 1,                A           925,000     5.00      1/1/15             1/1/03 @ 102
                Catawba Elec. Rev. Bonds, Ser. 1993
      14)  Allegheny Cnty. Hosp. Dev. Auth. (Allegheny          A(m)           900,000     6.00      5/1/20             5/1/02 @ 100
                Cnty., PA), Hlth. Facilities Rev. Rfdg.
                Bonds, Ser. 1992 (South Hills Hlth.
                Sys.)
      15)  Rhode Island Hlth. and Educl. Bldg. Corp.,      AAA                 700,000     6.50     11/15/24          11/15/02 @ 102
                Higher Educ. Fac. Rev. Bonds, Roger
                Williams Univ. Iss., Ser. 1992 (Connie
                Lee Ins.)
      16)  Wisconsin Hsg. and Econ. Dev. Auth. Hsg. Rev.   A1(m)               900,000     5.65      11/1/23           10/1/03 @ 102
                Bonds, 1993 Ser. A
      17)  Wisconsin Hlth. and Educl. Fac. Auth. Rev.      A(m)                750,000     6.60      8/15/22           8/15/02 @ 102
                Bonds, Ser. 1992 (Mercy Hosp. of
                Janesville, WI, Inc. Proj.)
                                                                       ---------------
                                                                       $    12,000,000
                                                                       ---------------
                                                                       ---------------
</TABLE>
 
                                                    YIELD TO
              SINKING            COST OF            MATURITY
                FUND              DEBT          ON INITIAL DATE
            REDEMPTIONS        OBLIGATIONS                OF
                (2)            TO FUND (3)       DEPOSIT (3)
           --------------  -------------------  ---------------
      10)     11/15/20     $        814,797.00         6.400%
 
      11)      7/1/15               407,840.00         6.750
 
      12)     12/1/10               231,955.00         6.450
 
      13)      1/1/13               758,009.75         6.650
 
      14)          --               834,012.00         6.600
 
      15)     11/15/12              707,441.00         6.350+
 
      16)      5/1/16               811,737.00         6.400
 
      17)     8/15/12               745,275.00         6.650
 
                           -------------------
                           $     11,281,823.25
                           -------------------
                           -------------------
    

 
See Footnotes on following page.
 
                                      A-10
<PAGE>
- ------------
NOTES
 
(1)  All ratings are by Standard & Poor's unless followed by '(m)' which
     indicates a Moody's rating. Moody's ratings have been furnished by the
     Evaluator but not confirmed with Moody's. Any rating followed by a '*' is
     subject to submission and review of final documentation. Any rating
     followed by 'p' is provisional and assumes the successful completion of the
     project being financed. (See Appendix A.)
(2)  Debt Obligations are first subject to optional redemptions by the issuers
     thereof (which may be exercised in whole or in part) or by other third
     parties who have purchased call rights, on the dates and at the prices
     indicated under the Optional Refunding Redemptions column in the table. In
     subsequent years Debt Obligations are redeemable or callable at declining
     prices, but typically not below par value. Some issues may be subject to
     sinking fund redemption or extraordinary redemption with premium prior to
     the dates shown.
     Certain Debt Obligations may be redeemed at par pursuant to mandatory
     redemption provisions which require redemption from amounts in excess of
     scheduled principal payments. Certain Debt Obligations may provide for
     redemption at par prior or in addition to any optional or mandatory
     redemption dates or maturity, for example, if proceeds are not able to be
     used as contemplated, if the project is sold by the owner, if the project
     is condemned or sold, if the project is destroyed and insurance proceeds
     are used to redeem the Debt Obligations, if any related credit support
     expires prior to maturity and is not renewed or substitute credit support
     not obtained, if interest on the Debt Obligations becomes subject to
     taxation, if, in the case of housing obligations, mortgages are prepaid, or
     in other special circumstances.
     Sinking fund redemptions are all at par and generally redeem only part of
     an issue. Some of the Debt Obligations have mandatory sinking funds which
     contain optional provisions permitting the issuer to increase the principal
     amount of Debt Obligations called on a mandatory redemption date. The
     sinking fund redemptions with optional provisions may, and optional
     refunding redemptions generally will, occur at times when the redeemed Debt
     Obligations have an offer side evaluation which represents a premium over
     par. To the extent that the Debt Obligations were acquired at a price
     higher than the redemption price, this will represent a loss of capital
     when compared with the original Public Offering Price of the Units. Monthly
     distributions will generally be reduced by the amount of the income which
     would otherwise have been paid with respect to redeemed Debt Obligations
     and there will be distributed to Holders any principal amount and premium
     received on such redemption after satisfying any redemption requests
     received by the Fund. The current return and long term return in this event
     may be affected by redemptions. The tax effect on Holders of redemptions
     and related distributions is described under Taxes.
 
   
(3)  Evaluation of Debt Obligations by the Evaluator is made on the basis of
     current offer side evaluation. The offer side evaluation is greater than
     the current bid side evaluation of the Debt Obligations, which is the basis
     on which Redemption Price per Unit is determined (see How To Sell). The
     aggregate value based on the bid side evaluation at the Evaluation Time on
     the business day prior to the Initial Date of Deposit was $11,233,823.25
     which is $48,000.00 (.40% of the aggregate face amount) lower than the
     aggregate Cost of Debt Obligations to Fund based on the offer side
     evaluation.
 
     Yield to Maturity on Initial Date of Deposit of Debt Obligations was
     computed on the basis of the offer side evaluation at the Evaluation Time
     on the business day prior to Initial Date of Deposit. Percentages in this
     column represent Yield to Maturity on Initial Date of Deposit unless
     followed by '+' which indicates yield to an earlier redemption date. (See
     Income and Distributions--Returns for a description of the computation of
     yield price.)
                      ------------------------------------
    The Debt Obligations in Portfolio Numbers 12 and 15 have been deposited with
    the Trustee. All other Debt Obligations are represented entirely by
    contracts to purchase such Debt Obligations, which were entered into by the
    Sponsors during the period February 14, 1995 to February 22, 1995. All
    contracts are expected to be settled by the initial settlement date for
    purchase of Units.
 
    +  See Footnote (3).
    
 
                                      A-11
<PAGE>
                        MUNICIPAL INVESTMENT TRUST FUND
                              DEFINED ASSET FUNDS
                               PROSPECTUS PART B
                                   AMT SERIES
                                 INSURED SERIES
                            INTERMEDIATE TERM SERIES
                             MONTHLY PAYMENT SERIES
                                  STATE SERIES
 
DESCRIPTION OF FUND INVESTMENTS
 
PORTFOLIO SELECTION
 
     Experienced professional buyers and research analysts for Defined Asset
Funds, with information on the markets for suitable securities and on thousands
of issues, selected securities for the Fund's portfolio (the 'Portfolio'),
considering its investment objective and other factors including: (1) the
quality of the Debt Obligations, as evidenced by a rating in the category A or
better by at least one recognized rating organization (see Appendix A) or
comparable credit enhancement or (in the opinion of Defined Asset Funds
research) credit characteristics; (2) yield and price relative to comparable
securities; (3) diversification as to purpose and location of issuer, subject to
availability of suitable debt obligations; and (4) maturities (including call
protection). There is no leverage or borrowing to increase the risk to the Fund,
nor does the Portfolio contain other kinds of securities to enhance yield.
 
     Composition of the Portfolio is summarized under Investment Summary and the
names and certain characteristics of the debt obligations in the Portfolio (the
'Debt Obligations' or the 'Securities') are listed in the financial statements.
 
     Yields on debt obligations depend on factors including general conditions
of the municipal bond market and the general bond markets, size of a particular
offering, and the maturity and rating of the particular issue. Ratings represent
opinions of the rating organizations as to the quality of securities rated, but
these are general (not absolute) standards of quality. Yields can vary among
obligations with similar maturities, coupons and ratings.
 
     Neither the Sponsors nor the Trustee are liable for any default, failure or
defect in a Security. If a contract to purchase any Debt Obligation fails (a
'Failed Debt Obligation'), the Sponsors are authorized to deposit Replacement
Securities which (i) are tax-exempt bonds issued by a state or political
subdivision or a U.S. territory or possession; (ii) have a fixed maturity or
disposition date substantially similar to the Failed Debt Obligation; (iii) are
rated A or better by at least one recognized rating organization or have
comparable credit characteristics; and (iv) are not when, as and if issued.
Replacement Securities must be deposited within 110 days after deposit of the
failed contract, at a cost not exceeding funds reserved for purchasing the
Failed Debt Obligation and at a yield to maturity and current return, as of the
date the failed contract was deposited, substantially equivalent (considering
then current market conditions and relative creditworthiness) to those of the
Failed Debt Obligation.
 
     With the deposit of the Securities in the Fund on the Initial Date of
Deposit, the Sponsors established a proportionate relationship among the face
amounts of each Security in the Portfolio. During the 90-day period following
the Initial Date of Deposit, the Sponsors may deposit additional Securities
('Additional Securities'), contracts to purchase Additional Securities or cash
(or a bank letter of credit in lieu of cash) with instructions to purchase
Additional Securities, in order to create new Units, maintaining to the extent
practicable the original proportionate relationship (the 'Original Proportionate
Relationship') among the face amounts of each Security in the Portfolio. It may
not be possible to maintain the exact Original Proportionate Relationship among
the Securities deposited on the Initial Date of Deposit because of, among other
reasons, purchase requirements, changes in prices, or unavailability of
Securities. Replacement Securities may be acquired under specified conditions
when Securities originally deposited are unavailable (see Portfolio Supervision
below). Units may be continuously offered to the public by means of this
Prospectus, resulting in a potential increase in the number of Units
outstanding.
 
     Because each Defined Fund is a portfolio of preselected securities,
purchasers know in advance what they are investing in. The Portfolio is listed
in the prospectus so that generally the securities, maturities, call dates and
 
                                       1
<PAGE>
ratings are known when they buy. Of course, the Portfolio changes somewhat over
time as additional Securities are deposited, as Securities are called or
redeemed, or as they are sold to meet redemptions and in the limited
circumstances described below.
 
PORTFOLIO SUPERVISION
 
     The Fund is a unit investment trust which follows a buy and hold investment
strategy. Traditional methods of investment management for mutual funds
typically involve frequent changes in fund holdings based on economic, financial
and market analyses. Because the Fund is not actively managed, it may retain an
issuer's securities despite adverse financial developments. However, Defined
Asset Funds' experienced financial analysts regularly review the Portfolio, and
the Sponsors may instruct the Trustee to sell securities in the following
circumstances: (i) default in payment of amounts due on the security; (ii)
institution of certain legal proceedings; (iii) other legal questions or
impediments affecting the security or payments thereon; (iv) default under
certain documents adversely affecting debt service or in payments on other
securities of the same issuer or guarantor; (v) decline in projected income
pledged for debt service on a revenue bond; (vi) if a security becomes taxable
or otherwise inconsistent with the Fund's investment objectives; (vii) a right
to sell or redeem the security pursuant to a guarantee or other credit support;
or (viii) decline in security price or other market or credit factors (including
advance refunding) that, in the opinion of Defined Asset Funds research, makes
retention of the security detrimental to the interests of Holders. If there is a
payment default on any Security and the Agent for the Sponsors fails to instruct
the Trustee within 30 days after notice of the default, the Trustee will sell
the Security.
 
     The Trustee must reject any offer by an issuer of a Debt Obligation to
exchange another security pursuant to a refunding or refinancing plan unless (a)
the Debt Obligation is in default or (b) in the written opinion of Defined Asset
Funds research analysts, a default is probable in the reasonably foreseeable
future, and the Sponsors instruct the Trustee to accept the offer or take any
other action with respect to the offer as the Sponsors consider appropriate.
 
     The Sponsors are authorized to increase the size and number of Units of the
Fund by the deposit of Additional Securities, contracts to purchase Additional
Securities or cash or a letter of credit with instructions to purchase
Additional Securities in exchange for the corresponding number of additional
Units during the 90-day period subsequent to the Initial Date of Deposit,
provided that the Original Proportionate Relationship is maintained to the
extent practicable. Deposits of Additional Securities subsequent to the 90-day
period following the Initial Date of Deposit must replicate exactly the original
proportionate relationship among the face amounts of Securities comprising the
Portfolio at the end of the initial 90-day period, subject to certain events.
 
     With respect to deposits of Additional Securities, in connection with
creating additional Units of the Fund during the 90-day period following the
Initial Date of Deposit, the Sponsors may specify minimum face amounts in which
Additional Securities will be deposited or purchased. If a deposit is not
sufficient to acquire minimum amounts of each Security, Additional Securities
may be acquired in the order of the Security most under-represented immediately
before the deposit when compared to the Original Proportionate Relationship. If
Securities of an issue originally deposited are unavailable at the time of
subsequent deposit, or cannot be purchased at reasonable prices or their
purchase is prohibited or restricted by law, regulation or policies applicable
to the Fund or any of the Sponsors, the Sponsors may (1) deposit cash or letter
of credit with instructions to purchase the Security when it becomes available
(provided that it becomes available within 110 days after the Initial Date of
Deposit) or (2) deposit (or instruct the Trustee to purchase) (i) Securities of
one or more other issues originally deposited or (ii) a Replacement Security
which will meet the conditions described above except that it must have a rating
at least equal to that of the Security it replaces (or, in the opinion of the
Sponsors, have comparable credit characteristics, if not rated). Any funds held
to acquire Additional or Replacement Securities which have not been used to
purchase Securities at the end of the 90-day period beginning with the Initial
Date of Deposit, shall be used to purchase Securities as described above or
shall be distributed to Holders together with the attributable sales charge.
 
RISK FACTORS
 
     An investment in units of beneficial interest in the Fund ('Units') should
be made with an understanding of the risks which an investment in fixed-rate
debt obligations may entail, including the risk that the value of the Portfolio
and hence of the Units will decline with increases in interest rates. In recent
years there have been wide fluctuations in interest rates and thus in the value
of fixed-rate debt obligations generally. The Sponsors cannot predict future
economic policies or their consequences or, therefore, the course or extent of
any similar fluctuations in the future. To the extent that payment of amounts
due on Debt Obligations depends on revenue from publicly held corporations, an
investor should understand that these Debt Obligations, in many cases, do
 
                                       2
<PAGE>
not have the benefit of covenants which would prevent the corporations from
engaging in capital restructurings or borrowing transactions in connection with
corporate acquisitions, leveraged buyouts or restructurings, which could have
the effect of reducing the ability of the corporation to meet its obligations
and may in the future result in the ratings of the Debt Obligations and the
value of the underlying Portfolio being reduced.
 
     The Securities are generally not listed on a national securities exchange.
Whether or not the Securities are listed, the principal trading market for the
Securities will generally be in the over-the-counter market. As a result, the
existence of a liquid trading market for the Securities may depend on whether
dealers will make a market in the Securities. There can be no assurance that a
market will be made for any of the Securities, that any market for the
Securities will be maintained or of the liquidity of the Securities in any
markets made. In addition, the Fund may be restricted under the Investment
Company Act of 1940 from selling Securities to any Sponsor. The price at which
the Securities may be sold to meet redemptions and the value of the Fund will be
adversely affected if trading markets for the Securities are limited or absent.
 
     Certain of the Securities in the Fund may have been deposited at a market
discount. Securities trade at less than par value because the interest rates on
the Securities are lower than interest on comparable debt securities being
issued at currently prevailing interest rates. The current returns of securities
trading at a market discount are lower than the current returns of comparably
rated debt securities of a similar type issued at currently prevailing interest
rates because discount securities tend to increase in market value as they
approach maturity and the full principal amount becomes payable. If currently
prevailing interest rates for newly issued and otherwise comparable securities
increase, the market discount of previously issued securities will become deeper
and if currently prevailing interest rates for newly issued comparable
securities decline, the market discount of previously issued securities will be
reduced, other things being equal. Market discount attributable to interest rate
changes does not indicate a lack of market confidence in the issue.
 
     Certain of the Securities in the Fund may have been deposited at a market
premium. Securities trade at a premium because the interest rates on the
Securities are higher than interest on comparable debt securities being issued
at currently prevailing interest rates. The current returns of securities
trading at a market premium are higher than the current returns of comparably
rated debt securities of a similar type issued at currently prevailing interest
rates because premium securities tend to decrease in market value as they
approach maturity when the face amount becomes payable. Because part of the
purchase price is thus returned not at maturity but through current income
payments, an early redemption of a premium security at par will result in a
reduction in yield to the Fund. If currently prevailing interest rates for newly
issued and otherwise comparable securities increase, the market premium of
previously issued securities will decline and if currently prevailing interest
rates for newly issued comparable securities decline, the market premium of
previously issued securities will increase, other things being equal. Market
premium attributable to interest rate changes does not indicate market
confidence in the issue.
 
     Holders of Units will be 'at risk' with respect to Securities purchased on
a when, as and if issued basis or for delayed delivery (i.e., either a gain or
loss may result from fluctuations in the offering side evaluation of the
Securities) from the date they commit for Units.
 
     As set forth under Investment Summary and Portfolio, the Fund may contain
or be concentrated in one or more of the types of Debt Obligations discussed
below. An investment in the Fund should be made with an understanding of the
risks that these securities may entail, certain of which are described below. In
addition, investment in a single State Trust, as opposed to a Fund which invests
in the obligations of several states, may involve some additional risk due to
the decreased diversification of economic, political, financial and market
risks. Political restrictions on the ability to tax and budgetary constraints
affecting the state government may result in reductions of, or delays in the
payment of, state aid to cities, counties, school districts and other local
units of government which, in turn, may strain the financial operations and have
an adverse impact on the creditworthiness of these entities. State agencies,
colleges and universities and health care organizations, with municipal debt
outstanding, may also be negatively impacted by reductions in state
appropriations.
 
GENERAL OBLIGATION BONDS
 
     Certain of the Debt Obligations in the Portfolio may be general obligations
of a governmental entity that are secured by the taxing power of the entity.
General obligation bonds are backed by the issuer's pledge of its full faith,
credit and taxing power for the payment of principal and interest. However, the
taxing power of any governmental entity may be limited by provisions of state
constitutions or laws and an entity's credit will depend on many factors,
including an erosion of the tax base due to population declines, natural
disasters, declines in the state's industrial base or inability to attract new
industries, economic limits on the ability to tax without eroding
 
                                       3
<PAGE>
the tax base and the extent to which the entity relies on Federal or state aid,
access to capital markets or other factors beyond the entity's control.
 
     As a result of the recession's adverse impact upon both revenue and
expenditures, as well as other factors, many state and local governments have
confronted deficits which were the most severe in recent years. Many issuers are
facing highly difficult choices about significant tax increases and/or spending
reductions in order to restore budgetary balance. Failure to implement these
actions on a timely basis could force the issuers to issue additional debt to
finance deficits or cash flow needs.
 
     In addition, certain of the Debt Obligations in the Fund may be obligations
of issuers who rely in whole or in part on ad valorem real property taxes as a
source of revenue. Certain proposals, in the form of state legislative proposals
or voter initiatives, to limit ad valorem real property taxes have been
introduced in various states, and an amendment to the constitution of the State
of California, providing for strict limitations on ad valorem real property
taxes, has had a significant impact on the taxing powers of local governments
and on the financial condition of school districts and local governments in
California. It is not possible at this time to predict the final impact of such
measures, or of similar future legislative or constitutional measures, on school
districts and local governments or on their abilities to make future payments on
their outstanding debt obligations.
 
MORAL OBLIGATION BONDS
 
     The Fund may also include 'moral obligation' bonds. If an issuer of moral
obligation bonds is unable to meet its obligations, the repayment of the bonds
becomes a moral commitment but not a legal obligation of the state or
municipality in question. Even though the state may be called on to restore any
deficits in capital reserve funds of the agencies or authorities which issued
the bonds, any restoration generally requires appropriation by the state
legislature and accordingly does not constitute a legally enforceable obligation
or debt of the state. The agencies or authorities generally have no taxing
power.
 
REFUNDED DEBT OBLIGATIONS
 
      Refunded Debt Obligations are typically secured by direct obligations of
the U.S. Government, or in some cases obligations guaranteed by the U.S.
Government, placed in an escrow account maintained by an independent trustee
until maturity or a predetermined redemption date. These obligations are
generally noncallable prior to maturity or the predetermined redemption date. In
a few isolated instances, however, bonds which were thought to be escrowed to
maturity have been called for redemption prior to maturity.
 
INDUSTRIAL DEVELOPMENT REVENUE BONDS ('IDRS')
 
     IDRs, including pollution control revenue bonds, are tax-exempt securities
issued by states, municipalities, public authorities or similar entities
('issuers') to finance the cost of acquiring, constructing or improving various
projects, including pollution control facilities and certain manufacturing
facilities. These projects are usually operated by corporations. IDRs are not
general obligations of governmental entities backed by their taxing power.
Issuers are only obligated to pay amounts due on the IDRs to the extent that
funds are available from the unexpended proceeds of the IDRs or from receipts or
revenues under arrangements between the issuer and the corporate operator of the
project. These arrangements may be in the form of a lease, installment sale
agreement, conditional sale agreement or loan agreement, but in each case the
payments to the issuer are designed to be sufficient to meet the payments of
amounts due on the IDRs.
 
     IDRs are generally issued under bond resolutions, agreements or trust
indentures pursuant to which the revenues and receipts payable to the issuer by
the corporate operator of the project have been assigned and pledged to the
holders of the IDRs or a trustee for the benefit of the holders of the IDRs. In
certain cases, a mortgage on the underlying project has been assigned to the
holders of the IDRs or a trustee as additional security for the IDRs. In
addition, IDRs are frequently directly guaranteed by the corporate operator of
the project or by an affiliated company. Regardless of the structure, payment of
IDRs is solely dependent upon the creditworthiness of the corporate operator of
the project, corporate guarantor and credit enhancer. Corporate operators or
guarantors that are industrial companies may be affected by many factors which
may have an adverse impact on the credit quality of the particular company or
industry. These include cyclicality of revenues and earnings, regulatory and
environmental restrictions, litigation resulting from accidents or
environmentally-caused illnesses, extensive competition (including that of
low-cost foreign companies), unfunded pension fund liabilities or off-balance
sheet items, and financial deterioration resulting from leveraged buy-outs or
takeovers. However, as discussed below, certain of the IDRs in the Portfolio may
be additionally insured or secured by letters of credit issued by banks or
otherwise guaranteed or secured to cover amounts due on the IDRs in the event of
default in payment by an issuer.
 
                                       4
<PAGE>
STATE AND LOCAL MUNICIPAL UTILITY OBLIGATIONS
 
     The ability of utilities to meet their obligations under revenue bonds
issued on their behalf is dependent on various factors, including the rates they
may charge their customers, the demand for their services and the cost of
providing those services. Utilities, in particular investor-owned utilities, are
subject to extensive regulation relating to the rates which they may charge
customers. Utilities can experience regulatory, political and consumer
resistance to rate increases. Utilities engaged in long-term capital projects
are especially sensitive to regulatory lags and disallowances in granting rate
increases. Any difficulty in obtaining timely and adequate rate increases could
adversely affect a utility's results of operations.
 
     The demand for a utility's services is influenced by, among other factors,
competition, weather conditions and economic conditions. Electric utilities, for
example, have experienced increased competition as a result of the availability
of other energy sources, the effects of conservation on the use of electricity,
self-generation by industrial customers and the generation of electricity by
co-generators and other independent power producers. Also, increased competition
will result if federal regulators determine that utilities must open their
transmission lines to competitors. Utilities which distribute natural gas also
are subject to competition from alternative fuels, including fuel oil, propane
and coal and the impact of deregulation.
 
     The utility industry is an increasing cost business making the cost of
generating electricity more expensive and heightening its sensitivity to
regulation. A utility's costs are affected by its cost of capital, the
availability and cost of fuel and other factors. There can be no assurance that
a utility will be able to pass on these increased costs to customers through
increased rates. Utilities incur substantial capital expenditures for plant and
equipment. In the future they will also incur increasing capital and operating
expenses to comply with environmental legislation such as the Clean Air Act of
1990, and other energy, licensing and other laws and regulations relating to,
among other things, air emissions, the quality of drinking water, waste water
discharge, solid and hazardous substance handling and disposal, and siting and
licensing of facilities. Environmental legislation and regulations are changing
rapidly and are the subject of current public policy debate and legislative
proposals. It is increasingly likely that many utilities will be subject to more
stringent environmental standards in the future that could result in significant
capital expenditures. Future legislation and regulation could include, among
other things, regulation of so-called electromagnetic fields associated with
electric transmission and distribution lines as well as emissions of carbon
dioxide and other so-called greenhouse gases associated with the burning of
fossil fuels. Compliance with these requirements may limit a utility's
operations or require substantial investments in new equipment and, as a result,
may adversely affect a utility's results of operations.
 
     The electric utility industry in general is subject to various external and
additional factors including (a) the effects of inflation upon the costs of
operation and construction, (b) uncertainties in predicting future load
requirements, (c) increased financing requirements coupled with limited
availability of capital, (d) exposure to cancellation and penalty charges on new
generating units under construction, (e) problems of cost and availability of
fuel, (f) litigation and proposed legislation designed to delay or prevent
construction of generating and other facilities, (g) the uncertain effects of
conservation on the use of electric energy and (h) increased competition as a
result of the availability of other energy sources and state deregulation
efforts. These factors may delay the construction and increase the cost of new
facilities, limit the use of, or necessitate costly modifications to, existing
facilities, impair the access of electric utilities to credit markets, or
substantially increase the cost of credit for electric generating facilities.
 
     The National Energy Policy Act ('NEPA'), which became law in October, 1992,
makes it mandatory for a utility to permit non-utility generators of electricity
access to its transmission system for wholesale customers, thereby increasing
competition for electric utilities. NEPA also mandated demand-side management
policies to be considered by utilities. NEPA prohibits the Federal Energy
Regulatory Commission from mandating electric utilities to engage in retail
wheeling, which is competition among suppliers of electric generation to provide
electricity to retail customers (particularly industrial retail customers) of a
utility. However, under NEPA, a state can mandate retail wheeling under certain
conditions. California, Michigan, New Mexico and Ohio have instituted
investigations into the possible introduction of retail wheeling within their
respective states, which could foster competition among the utilities. Retail
wheeling might result in the issue of stranded investment (investment in assets
not being recovered in base rates), thus hampering a utility's ability to meet
its obligations.
 
     There is concern by the public, the scientific community, and the U.S.
Congress regarding environmental damage resulting from the use of fossil fuels.
Congressional support for the increased regulation of air, water, and soil
contaminants is building and there are a number of pending or recently enacted
legislative proposals which may affect the electric utility industry. In
particular, on November 15, 1990, legislation was signed into law that
substantially revises the Clean Air Act (the '1990 Amendments'). The 1990
Amendments seek to improve the
 
                                       5
<PAGE>
ambient air quality throughout the United States by the year 2000. A main
feature of the 1990 Amendments is the reduction of sulphur dioxide and nitrogen
oxide emissions caused by electric utility power plants, particularly those
fueled by coal. Under the 1990 Amendments the U.S. Environmental Protection
Agency ('EPA') must develop limits for nitrogen oxide emissions by 1993. The
sulphur dioxide reduction will be achieved in two phases. Phase I addresses
specific generating units named in the 1990 Amendments. In Phase II the total
U.S. emissions will be capped at 8.9 million tons by the year 2000. The 1990
Amendments contain provisions for allocating allowances to power plants based on
historical or calculated levels. An allowance is defined as the authorization to
emit one ton of sulphur dioxide.
 
     The 1990 Amendments also provide for possible further regulation of toxic
air emissions from electric generating units pending the results of several
federal government studies to be presented to Congress by the end of 1995 with
respect to anticipated hazards to public health, available corrective
technologies, and mercury toxicity.
 
     Electric utilities which own or operate nuclear power plants are exposed to
risks inherent in the nuclear industry. These risks include exposure to new
requirements resulting from extensive federal and state regulatory oversight,
public controversy, decommissioning costs, and spent fuel and radioactive waste
disposal issues. While nuclear power construction risks are no longer of
paramount concern, the emerging issue is radioactive waste disposal. In
addition, nuclear plants typically require substantial capital additions and
modifications throughout their operating lives to meet safety, environmental,
operational and regulatory requirements and to replace and upgrade various plant
systems. The high degree of regulatory monitoring and controls imposed on
nuclear plants could cause a plant to be out of service or on limited service
for long periods. When a nuclear facility owned by an investor-owned utility or
a state or local municipality is out of service or operating on a limited
service basis, the utility operator or its owners may be liable for the recovery
of replacement power costs. Risks of substantial liability also arise from the
operation of nuclear facilities and from the use, handling, and possible
radioactive emissions associated with nuclear fuel. Insurance may not cover all
types or amounts of loss which may be experienced in connection with the
ownership and operation of a nuclear plant and severe financial consequences
could result from a significant accident or occurrence. The Nuclear Regulatory
Commission has promulgated regulations mandating the establishment of funded
reserves to assure financial capability for the eventual decommissioning of
licensed nuclear facilities. These funds are to be accrued from revenues in
amounts currently estimated to be sufficient to pay for decommissioning costs.
Since there have been very few nuclear plants decommissioned to date, these
estimates may be unrealistic.
 
     The ability of state and local joint action power agencies to make payments
on bonds they have issued is dependent in large part on payments made to them
pursuant to power supply or similar agreements. Courts in Washington, Oregon and
Idaho have held that certain agreements between the Washington Public Power
Supply System ('WPPSS') and the WPPSS participants are unenforceable because the
participants did not have the authority to enter into the agreements. While
these decisions are not specifically applicable to agreements entered into by
public entities in other states, they may cause a reexamination of the legal
structure and economic viability of certain projects financed by joint action
power agencies, which might exacerbate some of the problems referred to above
and possibly lead to legal proceedings questioning the enforceability of
agreements upon which payment of these bonds may depend.
 
                                       6
<PAGE>
LEASE RENTAL OBLIGATIONS
 
     Lease rental obligations are issued for the most part by governmental
authorities that have no taxing power or other means of directly raising
revenues. Rather, the authorities are financing vehicles created solely for the
construction of buildings (administrative offices, convention centers and
prisons, for example) or the purchase of equipment (police cars and computer
systems, for example) that will be used by a state or local government (the
'lessee'). Thus, the obligations are subject to the ability and willingness of
the lessee government to meet its lease rental payments which include debt
service on the obligations. Willingness to pay may be subject to changes in the
views of citizens and government officials as to the essential nature of the
finance project. Lease rental obligations are subject, in almost all cases, to
the annual appropriation risk, i.e., the lessee government is not legally
obligated to budget and appropriate for the rental payments beyond the current
fiscal year. These obligations are also subject to the risk of abatement in many
states--rental obligations cease in the event that damage, destruction or
condemnation of the project prevents its use by the lessee. (In these cases,
insurance provisions and reserve funds designed to alleviate this risk become
important credit factors). In the event of default by the lessee government,
there may be significant legal and/or practical difficulties involved in the
reletting or sale of the project. Some of these issues, particularly those for
equipment purchase, contain the so-called 'substitution safeguard', which bars
the lessee government, in the event it defaults on its rental payments, from the
purchase or use of similar equipment for a certain period of time. This
safeguard is designed to insure that the lessee government will appropriate the
necessary funds even though it is not legally obligated to do so, but its
legality remains untested in most, if not all, states.
 
SINGLE FAMILY AND MULTI-FAMILY HOUSING OBLIGATIONS
 
     Multi-family housing revenue bonds and single family mortgage revenue bonds
are state and local housing issues that have been issued to provide financing
for various housing projects. Multi-family housing revenue bonds are payable
primarily from the revenues derived from mortgage loans to housing projects for
low to moderate income families. Single-family mortgage revenue bonds are issued
for the purpose of acquiring from originating financial institutions notes
secured by mortgages on residences.
 
     Housing obligations are not general obligations of the issuer although
certain obligations may be supported to some degree by Federal, state or local
housing subsidy programs. Budgetary constraints experienced by these programs as
well as the failure by a state or local housing issuer to satisfy the
qualifications required for coverage under these programs or any legal or
administrative determinations that the coverage of these programs is not
available to a housing issuer, probably will result in a decrease or elimination
of subsidies available for payment of amounts due on the issuer's obligations.
The ability of housing issuers to make debt service payments on their
obligations will also be affected by various economic and non-economic
developments including, among other things, the achievement and maintenance of
sufficient occupancy levels and adequate rental income in multi-family projects,
the rate of default on mortgage loans underlying single family issues and the
ability of mortgage insurers to pay claims, employment and income conditions
prevailing in local markets, increases in construction costs, taxes, utility
costs and other operating expenses, the managerial ability of project managers,
changes in laws and governmental regulations and economic trends generally in
the localities in which the projects are situated. Occupancy of multi-family
housing projects may also be adversely affected by high rent levels and income
limitations imposed under Federal, state or local programs.
 
     All single family mortgage revenue bonds and certain multi-family housing
revenue bonds are prepayable over the life of the underlying mortgage or
mortgage pool, and therefore the average life of housing obligations cannot be
determined. However, the average life of these obligations will ordinarily be
less than their stated maturities. Single-family issues are subject to mandatory
redemption in whole or in part from prepayments on underlying mortgage loans;
mortgage loans are frequently partially or completely prepaid prior to their
final stated maturities as a result of events such as declining interest rates,
sale of the mortgaged premises, default, condemnation or casualty loss.
Multi-family issues are characterized by mandatory redemption at par upon the
occurrence of monetary defaults or breaches of covenants by the project
operator. Additionally, housing obligations are generally subject to mandatory
partial redemption at par to the extent that proceeds from the sale of the
obligations are not allocated within a stated period (which may be within a year
of the date of issue). To the extent that these obligations were valued at a
premium when a Holder purchased Units, any prepayment at par would result in a
loss of capital to the Holder and, in any event, reduce the amount of income
that would otherwise have been paid to Holders.
 
     The tax exemption for certain housing revenue bonds depends on
qualification under Section 143 of the Internal Revenue Code of 1986, as amended
(the 'Code'), in the case of single family mortgage revenue bonds or Section
142(a)(7) of the Code or other provisions of Federal law in the case of certain
multi-family housing
 
                                       7
<PAGE>
revenue bonds (including Section 8 assisted bonds). These sections of the Code
or other provisions of Federal law contain certain ongoing requirements,
including requirements relating to the cost and location of the residences
financed with the proceeds of the single family mortgage revenue bonds and the
income levels of tenants of the rental projects financed with the proceeds of
the multi-family housing revenue bonds. While the issuers of the bonds and other
parties, including the originators and servicers of the single-family mortgages
and the owners of the rental projects financed with the multi-family housing
revenue bonds, generally covenant to meet these ongoing requirements and
generally agree to institute procedures designed to ensure that these
requirements are met, there can be no assurance that these ongoing requirements
will be consistently met. The failure to meet these requirements could cause the
interest on the bonds to become taxable, possibly retroactively from the date of
issuance, thereby reducing the value of the bonds, subjecting the Holders to
unanticipated tax liabilities and possibly requiring the Trustee to sell the
bonds at reduced values. Furthermore, any failure to meet these ongoing
requirements might not constitute an event of default under the applicable
mortgage or permit the holder to accelerate payment of the bond or require the
issuer to redeem the bond. In any event, where the mortgage is insured by the
Federal Housing Administration, its consent may be required before insurance
proceeds would become payable to redeem the mortgage bonds.
 
HOSPITAL AND HEALTH CARE FACILITY OBLIGATIONS
 
     The ability of hospitals and other health care facilities to meet their
obligations with respect to revenue bonds issued on their behalf is dependent on
various factors, including the level of payments received from private
third-party payors and government programs and the cost of providing health care
services.
 
     A significant portion of the revenues of hospitals and other health care
facilities is derived from private third-party payors and government programs,
including the Medicare and Medicaid programs. Both private third-party payors
and government programs have undertaken cost containment measures designed to
limit payments made to health care facilities. Furthermore, government programs
are subject to statutory and regulatory changes, retroactive rate adjustments,
administrative rulings and government funding restrictions, all of which may
materially decrease the rate of program payments for health care facilities.
Certain special revenue obligations (i.e., Medicare or Medicaid revenues) may be
payable subject to appropriations by state legislatures. There can be no
assurance that payments under governmental programs will remain at levels
comparable to present levels or will, in the future, be sufficient to cover the
costs allocable to patients participating in such programs. In addition, there
can be no assurance that a particular hospital or other health care facility
will continue to meet the requirements for participation in such programs.
 
     The costs of providing health care services are subject to increase as a
result of, among other factors, changes in medical technology and increased
labor costs. In addition, health care facility construction and operation is
subject to federal, state and local regulation relating to the adequacy of
medical care, equipment, personnel, operating policies and procedures,
rate-setting, and compliance with building codes and environmental laws.
Facilities are subject to periodic inspection by governmental and other
authorities to assure continued compliance with the various standards necessary
for licensing and accreditation. These regulatory requirements are subject to
change and, to comply, it may be necessary for a hospital or other health care
facility to incur substantial capital expenditures or increased operating
expenses to effect changes in its facilities, equipment, personnel and services.
 
     Hospitals and other health care facilities are subject to claims and legal
actions by patients and others in the ordinary course of business. Although
these claims are generally covered by insurance, there can be no assurance that
a claim will not exceed the insurance coverage of a health care facility or that
insurance coverage will be available to a facility. In addition, a substantial
increase in the cost of insurance could adversely affect the results of
operations of a hospital or other health care facility. The Clinton
Administration may impose regulations which could limit price increases for
hospitals or the level of reimbursements for third-party payors or other
measures to reduce health care costs and make health care available to more
individuals, which would reduce profits for hospitals. Some states, such as New
Jersey, have significantly changed their reimbursement systems. If a hospital
cannot adjust to the new system by reducing expenses or raising rates, financial
difficulties may arise. Also, Blue Cross has denied reimbursement for some
hospitals for services other than emergency room services. The lost volume would
reduce revenues unless replacement patients were found.
 
     Certain hospital bonds may provide for redemption at par at any time upon
the sale by the issuer of the hospital facilities to a non-affiliated entity, if
the hospital becomes subject to ad valorem taxation, or in various other
circumstances. For example, certain hospitals may have the right to call bonds
at par if the hospital may be legally required because of the bonds to perform
procedures against specified religious principles or to disclose information
that is considered confidential or privileged. Certain FHA-insured bonds may
provide that all or a portion of those bonds, otherwise callable at a premium,
can be called at par in certain circumstances. If a
 
                                       8
<PAGE>
hospital defaults upon a bond obligation, the realization of Medicare and
Medicaid receivables may be uncertain and, if the bond obligation is secured by
the hospital facilities, legal restrictions on the ability to foreclose upon the
facilities and the limited alternative uses to which a hospital can be put may
severely reduce its collateral value.
 
     The Internal Revenue Service is currently engaged in a program of intensive
audits of certain large tax-exempt hospital and health care facility
organizations. Although these audits have not yet been completed, it has been
reported that the tax-exempt status of some of these organizations may be
revoked. At this time, it is uncertain whether any of the hospital and health
care facility obligations held by the Fund will be affected by such audit
proceedings.
 
AIRPORT, PORT AND HIGHWAY REVENUE OBLIGATIONS
 
     Certain facility revenue bonds are payable from and secured by the revenues
from the ownership and operation of particular facilities, such as airports
(including airport terminals and maintenance facilities), bridges, marine
terminals, turnpikes and port authorities. For example, the major portion of
gross airport operating income is generally derived from fees received from
signatory airlines pursuant to use agreements which consist of annual payments
for airport use, occupancy of certain terminal space, facilities, service fees,
concessions and leases. Airport operating income may therefore be affected by
the ability of the airlines to meet their obligations under the use agreements.
The air transport industry is experiencing significant variations in earnings
and traffic, due to increased competition, excess capacity, increased aviation
fuel, deregulation, traffic constraints and other factors. As a result, several
airlines are experiencing severe financial difficulties. Several airlines
including America West Airlines have sought protection from their creditors
under Chapter 11 of the Bankruptcy Code. In addition, other airlines such as
Midway Airlines, Inc., Eastern Airlines, Inc. and Pan American Corporation have
been liquidated. However, Continental Airlines and Trans World Airlines have
emerged from bankruptcy. The Sponsors cannot predict what effect these industry
conditions may have on airport revenues which are dependent for payment on the
financial condition of the airlines and their usage of the particular airport
facility. Furthermore, proposed legislation would provide the U.S. Secretary of
Transportation with the temporary authority to freeze airport fees upon the
occurrence of disputes between a particular airport facility and the airlines
utilizing that facility.
 
     Similarly, payment on bonds related to other facilities is dependent on
revenues from the projects, such as use fees from ports, tolls on turnpikes and
bridges and rents from buildings. Therefore, payment may be adversely affected
by reduction in revenues due to such factors and increased cost of maintenance
or decreased use of a facility, lower cost of alternative modes of
transportation or scarcity of fuel and reduction or loss of rents.
 
SOLID WASTE DISPOSAL BONDS
 
     Bonds issued for solid waste disposal facilities are generally payable from
dumping fees and from revenues that may be earned by the facility on the sale of
electrical energy generated in the combustion of waste products. The ability of
solid waste disposal facilities to meet their obligations depends upon the
continued use of the facility, the successful and efficient operation of the
facility and, in the case of waste-to-energy facilities, the continued ability
of the facility to generate electricity on a commercial basis. All of these
factors may be affected by a failure of municipalities to fully utilize the
facilities, an insufficient supply of waste for disposal due to economic or
population decline, rising construction and maintenance costs, any delays in
construction of facilities, lower-cost alternative modes of waste processing and
changes in environmental regulations. Because of the relatively short history of
this type of financing, there may be technological risks involved in the
satisfactory construction or operation of the projects exceeding those
associated with most municipal enterprise projects. Increasing environmental
regulation on the federal, state and local level has a significant impact on
waste disposal facilities. While regulation requires more waste producers to use
waste disposal facilities, it also imposes significant costs on the facilities.
These costs include compliance with frequently changing and complex regulatory
requirements, the cost of obtaining construction and operating permits, the cost
of conforming to prescribed and changing equipment standards and required
methods of operation and, for incinerators or waste-to-energy facilities, the
cost of disposing of the waste residue that remains after the disposal process
in an environmentally safe manner. In addition, waste disposal facilities
frequently face substantial opposition by environmental groups and officials to
their location and operation, to the possible adverse effects upon the public
health and the environment that may be caused by wastes disposed of at the
facilities and to alleged improper operating procedures. Waste disposal
facilities benefit from laws which require waste to be disposed of in a certain
manner but any relaxation of these laws could cause a decline in demand for the
facilities' services. Finally, waste-to-energy facilities are concerned with
many of the same issues facing utilities insofar as they derive revenues from
the sale of energy to local power utilities (see State and Local Municipal
Utility Obligations above).
 
                                       9
<PAGE>
SPECIAL TAX BONDS
 
     Special tax bonds are payable from and secured by the revenues derived by a
municipality from a particular tax such as a tax on the rental of a hotel room,
on the purchase of food and beverages, on the rental of automobiles or on the
consumption of liquor. Special tax bonds are not secured by the general tax
revenues of the municipality, and they do not represent general obligations of
the municipality. Therefore, payment on special tax bonds may be adversely
affected by a reduction in revenues realized from the underlying special tax due
to a general decline in the local economy or population or due to a decline in
the consumption, use or cost of the goods and services that are subject to
taxation. Also, should spending on the particular goods or services that are
subject to the special tax decline, the municipality may be under no obligation
to increase the rate of the special tax to ensure that sufficient revenues are
raised from the shrinking taxable base.
 
TRANSIT AUTHORITY OBLIGATIONS
 
     Mass transit is generally not self-supporting from fare revenues.
Therefore, additional financial resources must be made available to ensure
operation of mass transit systems as well as the timely payment of debt service.
Often such financial resources include Federal and state subsidies, lease
rentals paid by funds of the state or local government or a pledge of a special
tax such as a sales tax or a property tax. If fare revenues or the additional
financial resources do not increase appropriately to pay for rising operating
expenses, the ability of the issuer to adequately service the debt may be
adversely affected.
 
MUNICIPAL WATER AND SEWER REVENUE BONDS
 
     Water and sewer bonds are generally payable from user fees. The ability of
state and local water and sewer authorities to meet their obligations may be
affected by failure of municipalities to utilize fully the facilities
constructed by these authorities, economic or population decline and resulting
decline in revenue from user charges, rising construction and maintenance costs
and delays in construction of facilities, impact of environmental requirements,
failure or inability to raise user charges in response to increased costs, the
difficulty of obtaining or discovering new supplies of fresh water, the effect
of conservation programs and the impact of 'no growth' zoning ordinances. In
some cases this ability may be affected by the continued availability of Federal
and state financial assistance and of municipal bond insurance for future bond
issues.
 
UNIVERSITY AND COLLEGE OBLIGATIONS
 
     The ability of universities and colleges to meet their obligations is
dependent upon various factors, including the size and diversity of their
sources of revenues, enrollment, reputation, management expertise, the
availability and restrictions on the use of endowments and other funds, the
quality and maintenance costs of campus facilities, and, in the case of public
institutions, the financial condition of the relevant state or other
governmental entity and its policies with respect to education. The
institution's ability to maintain enrollment levels will depend on such factors
as tuition costs, demographic trends, geographic location, geographic diversity
and quality of the student body, quality of the faculty and the diversity of
program offerings.
 
     Legislative or regulatory action in the future at the Federal, state or
local level may directly or indirectly affect eligibility standards or reduce or
eliminate the availability of funds for certain types of student loans or grant
programs, including student aid, research grants and work-study programs, and
may affect indirect assistance for education.
 
PUERTO RICO
 
     The Portfolio may contain Debt Obligations of issuers which will be
affected by general economic conditions in Puerto Rico. Puerto Rico's
unemployment rate remains significantly higher than the U.S. unemployment rate.
Furthermore, the economy is largely dependent for its development upon U.S.
policies and programs that are being reviewed and may be eliminated.
 
     The Puerto Rican economy is affected by a number of Commonwealth and
Federal investment incentive programs. For example, Section 936 of the Code
provides for a credit against Federal income taxes for U.S. companies operating
on the island if certain requirements are met. The Omnibus Budget Reconciliation
Act of 1993 imposes limits on such credit, effective for tax years beginning
after 1993. In addition, from time to time proposals are introduced in Congress
which, if enacted into law, would eliminate some or all of the benefits of
Section 936. Although no assessment can be made at this time of the precise
effect of such limitation, it is expected that the limitation of Section 936
credits would have a negative impact on Puerto Rico's economy.
 
     Aid for Puerto Rico's economy has traditionally depended heavily on Federal
programs, and current Federal budgetary policies suggest that an expansion of
aid to Puerto Rico is unlikely. An adverse effect on the Puerto
 
                                       10
<PAGE>
Rican economy could result from other U.S. policies, including a reduction of
tax benefits for distilled products, further reduction in transfer payment
programs such as food stamps, curtailment of military spending and policies
which could lead to a stronger dollar.
 
     In a plebiscite held in November, 1993, the Puerto Rican electorate chose
to continue Puerto Rico's Commonwealth status. Previously proposed legislation,
which was not enacted, would have preserved the federal tax exempt status of the
outstanding debts of Puerto Rico and its public corporations regardless of the
outcome of the referendum, to the extent that similar obligations issued by
states are so treated and subject to the provisions of the Code currently in
effect. There can be no assurance that any pending or future legislation finally
enacted will include the same or similar protection against loss of tax
exemption. The November 1993 plebiscite can be expected to have both direct and
indirect consequences on such matters as the basic characteristics of future
Puerto Rico debt obligations, the markets for these obligations, and the types,
levels and quality of revenue sources pledged for the payment of existing and
future debt obligations. Such possible consequences include legislative
proposals seeking restoration of the status of Section 936 benefits otherwise
subject to the limitations discussed above. However, no assessment can be made
at this time of the economic and other effects of a change in federal laws
affecting Puerto Rico as a result of the November 1993 plebiscite.
 
OBLIGATIONS BACKED BY LETTERS OF CREDIT
 
     Certain Debt Obligations may be secured by letters of credit issued by
commercial banks or savings banks, savings and loan associations and similar
institutions ('thrifts') or are direct obligations of banks or thrifts pursuant
to 'loans-to-lenders' programs. The letter of credit may be drawn upon, and the
Debt Obligations consequently redeemed, if an issuer fails to pay amounts due on
the Debt Obligation or defaults under its reimbursement agreement with the
issuer of the letter of credit or, in certain cases, if the interest on the Debt
Obligation is deemed to be taxable and full payment of amounts due is not made
by the issuer. The letters of credit are irrevocable obligations of the issuing
institutions, which are subject to extensive governmental regulations which may
limit both the amounts and types of loans and other financial commitments which
may be made and interest rates and fees which may be charged.
 
     The profitability of financial institutions (and therefore their ability to
honor letters of credit or guarantees) is largely dependent upon the
availability and cost of funds for the purpose of financing lending operations
under prevailing money market conditions. Also, general economic conditions play
an important part in the operations of this industry and exposure to credit
losses arising from possible financial difficulties of borrowers might affect an
institution's ability to meet its obligations. In the late 1980's and early
1990's the credit ratings of U.S. banks and bank holding companies were subject
to extensive downgrades due primarily to deterioration in asset quality and the
attendant impact on earnings and capital adequacy. Major U.S. banks, in
particular, suffered from a decline in asset quality in the areas of
construction and commercial real estate loans. These problem loans have been
largely addressed. During the early 1990's the credit ratings of many foreign
banks have also been subject to significant downgrades due to a deterioration in
asset quality which has negatively impacted earnings and capital adequacy. The
decline in asset quality of major foreign banks has been brought about largely
by recessionary conditions in their local economies. The Federal Deposit
Insurance Corporation ('FDIC') indicated that in 1990, 168 federally insured
banks with an aggregate total of $45.7 billion in assets failed and that in
1991, 124 federally insured banks with an aggregate total of $64.3 billion in
assets failed. During 1992, the FDIC resolved 120 failed banks with combined
assets of $44.2 billion. In 1993, a total of 41 banks with combined assets of
$3.5 billion were closed. The 1993 total was the lowest level in twelve years.
Bank holding companies and other financial institutions may not be as highly
regulated as banks, and may be more able to expand into other non-financial and
non-traditional businesses.
 
     Historically, thrifts primarily financed residential and commercial real
estate by making fixed-rate mortgage loans and funded those loans from various
types of deposits. Thrifts were restricted as to the types of accounts which
could be offered and the rates that could be paid on those accounts. During
periods of high interest rates, large amounts of deposits were withdrawn as
depositors invested in Treasury bills and notes and in money market funds which
provided liquidity and high yields not subject to regulation. As a result the
cost of thrifts' funds exceeded income from mortgage loan portfolios and other
investments, and their financial positions were adversely affected. Laws and
regulations eliminating interest rate ceilings and restrictions on types of
accounts that may be offered by thrifts were designed to permit thrifts to
compete for deposits on the basis of current market rates and to improve their
financial positions.
 
     Recent legislation, including the Financial Institutions Reform, Recovery
and Enforcement Act of 1989, the Federal Deposit Insurance Corporation
Improvement Act of 1991 ('FDICIA') and the Resolution Trust
 
                                       11
<PAGE>
Corporation Refinancing, Restructuring, and Improvement Act of 1991 have
significantly altered the legal rules and regulations governing banks and
thrifts and mandated early and aggressive regulatory intervention for unhealthy
institutions. For those thrifts that have failed, either the FDIC or the
Resolution Trust Corporation ('RTC') will be appointed as receiver or
conservator. Periodic efforts by recent Administrations to introduce legislation
broadening the ability of banks and thrifts to compete with new products
generally have not been successful, but if enacted could lead to more failures
as a result of increased competition and added risks. Failure to enact such
legislation, on the other hand, may lead to declining earnings and an inability
to compete with unregulated financial institutions. Efforts to expand the
ability of federal thrifts to branch on an interstate basis have been initially
successful through promulgation of regulations. Legislation to liberalize
interstate branching for banks has been stalled in Congress, but may be more
successful this year. Consolidation is likely to continue in both cases. The
Securities and Exchange Commission ('SEC') is attempting to require the expanded
use of market value accounting by banks and thrifts, and has imposed rules
requiring market accounting for investment securities held for sale. Adoption of
these and similar rules may result in increased volatility in the reported
health of the industry and mandated regulatory intervention to correct such
problems.
 
     Investors should realize that should the FDIC or the RTC make payment under
a letter of credit prior to the scheduled maturity or disposition dates of the
related Debt Obligation their investment will be returned sooner than originally
anticipated. The possibility of such early payment has been increased
significantly by the enactment of FDICIA, which requires federal regulators of
insured banks, savings banks, and thrifts to act more quickly to address the
problems of undercapitalized institutions than previously, and specifies in more
detail the actions they must take. One such requirement virtually compels the
appointment of a receiver or conservator for any institution when its ratio of
tangible equity to total assets declines to two percent. Others force aggressive
intervention in the business of an institution at even earlier stages of
deterioration.
 
     Certain letters of credit or guarantees backing Debt Obligations may have
been issued by a foreign bank or corporation or similar entity (a 'Foreign
Guarantee'). On the basis of information available to the Sponsors at the
present time no Foreign Guarantee is subject to exchange control restrictions
under existing law which would materially interfere with payments to the Fund
under the Foreign Guarantee. However, there can be no assurance that exchange
control regulations might not be adopted in the future which might affect
adversely the payment to the Fund. Nor are there any withholding taxes under
existing law applicable to payments made on any Foreign Guarantee. While there
can be no assurance that withholding taxes might not be imposed in the future,
provision is made in the instruments governing any Foreign Guarantee that, in
substance, to the extent permitted by applicable law, additional payments will
be made by the guarantor so that the total amount paid, after deduction of any
applicable tax, will not be less than the amount then due and payable on the
Foreign Guarantee. The adoption of exchange control regulations and other legal
restrictions could have an adverse impact on the marketability of any Debt
Obligations backed by a Foreign Guarantee and on the ability of the Fund to
satisfy its obligation to redeem Units tendered to the Trustee for redemption
(see How to Sell).
 
OBLIGATIONS BACKED BY INSURANCE
 
     Certain Debt Obligations (the 'Insured Debt Obligations') may be insured or
guaranteed by AMBAC Indemnity Corporation ('AMBAC'), Asset Guaranty Reinsurance
Co. ('Asset Guaranty'), Capital Guaranty Insurance Company ('CGIC'), Capital
Markets Assurance Corp. ('CAPMAC'), Connie Lee Insurance Company ('Connie Lee'),
Continental Casualty Company ('Continental'), Financial Guaranty Insurance
Company ('Financial Guaranty'), Financial Security Assurance Inc. ('FSA'),
Firemen's Insurance Company of Newark, New Jersey ('Firemen's'), Municipal Bond
Investors Assurance Corporation ('MBIA') or National Union Fire Insurance
Company of Pittsburgh, Pa. ('National Union') (collectively, the 'Insurance
Companies'). The claims-paying ability of each of these companies, unless
otherwise indicated, is rated AAA by Standard & Poor's or another acceptable
national rating agency. The ratings are subject to change at any time at the
discretion of the rating agencies. In determining whether to insure bonds, the
Insurance Companies severally apply their own standards. The cost of this
insurance is borne either by the issuers or previous owners of the bonds or by
the Sponsors. The insurance policies are non-cancellable and will continue in
force so long as the Insured Debt Obligations are outstanding and the insurers
remain in business. The insurance policies guarantee the timely payment of
principal and interest on but do not guarantee the market value of the Insured
Debt Obligations or the value of the Units. The insurance policies generally do
not provide for accelerated payments of principal or cover redemptions resulting
from events of taxability. If the issuer of any Insured Debt Obligation should
fail to make an interest or principal payment, the insurance policies generally
provide that the Trustee or its agent shall give notice of nonpayment to the
Insurance Company or its agent and provide evidence of the Trustee's right to
receive payment. The Insurance Company is then required to disburse the amount
of the failed payment to the Trustee or its agent and is thereafter subrogated
to the Trustee's right to receive payment from the issuer.
 
                                       12
<PAGE>
      Financial information relating to the Insurance Companies has been
obtained from publicly available information. No representation is made as to
the accuracy or adequacy of the information or as to the absence of material
adverse changes since the information was made available to the public. Standard
& Poor's has rated the Units of any Insured Fund AAA because the Insurance
Companies have insured the Debt Obligations. The assignment of such AAA ratings
is due to Standard & Poor's assessment of the creditworthiness of the Insurance
Companies and of their ability to pay claims on their policies of insurance. In
the event that Standard & Poor's reassesses the creditworthiness of any
Insurance Company which would result in the rating of an Insured Fund being
reduced, the Sponsors are authorized to direct the Trustee to obtain other
insurance.
 
      The following are brief descriptions of certain Insurance Companies. The
financial information presented for each company has been determined on a
statutory basis and is unaudited.
 
      AMBAC is a Wisconsin-domiciled stock insurance company, regulated by the
Insurance Department of the State of Wisconsin, and licensed to do business in
various states, with admitted assets of approximately $2,150,000,000 and
policyholders' surplus of approximately $779,000,000 as of September 30, 1994.
AMBAC is a wholly-owned subsidiary of AMBAC Inc., a financial holding company
which is publicly owned following a complete divestiture by Citibank during the
first quarter of 1992.
 
      Asset Guaranty is a New York State insurance company licensed to write
financial guarantee, credit, residual value and surety insurance. Asset Guaranty
commenced operations in mid-1988 by providing reinsurance to several major
monoline insurers. The parent holding company of Asset Guaranty, Asset Guarantee
Inc. (AGI), merged with Enhance Financial Services (EFS) in June, 1990 to form
Enhance Financial Services Group Inc. (EFSG). The two main, 100%-owned
subsidiaries of EFSG, Asset Guaranty and Enhance Reinsurance Company, share
common management and physical resources. After an initial public offering
completed in February 1992 and the sale by Merrill Lynch & Co. of its stake,
EFSG is 49.8%-owned by the public, 29.9% by US West Financial Services, 14.1% by
Manufacturers Life Insurance Co. and 6.2% by senior management. Both ERC and
Asset Guaranty are rated 'AAA' for claims paying ability by Duff & Phelps, ERC
is rated triple-A for claims-paying-ability for both S&P and Moody's. Asset
Guaranty received a 'AA' claims-paying-ability rating from S&P during August
1993, but remains unrated by Moody's. As of September 30, 1994 Asset Guaranty
had admitted assets of approximately $152,000,000 and policyholders' surplus of
approximately $73,000,000.
 
      CGIC, a monoline bond insurer headquartered in San Francisco, California,
was established in November 1986 to assume the financial guaranty business of
United States Fidelity and Guaranty Company ('USF&G'). It is a wholly-owned
subsidiary of Capital Guaranty Corporation ('CGC') whose stock is owned by:
Constellation Investments, Inc., an affiliate of Baltimore Gas & Electric,
Fleet/Norstar Financial Group, Inc., Safeco Corporation, Sibag Finance
Corporation, an affiliate of Siemens AG, USF&G, the eighth largest
property/casualty company in the U.S. as measured by net premiums written, and
CGC management. As of September 30, 1994, CGIC had total admitted assets of
approximately $293,000,000 and policyholders' surplus of approximately
$166,000,000.
 
      CAPMAC commenced operations in December 1987, as the second mono-line
financial guaranty insurance company (after FSA) organized solely to insure
non-municipal obligations. CAPMAC, a New York corporation, is a wholly-owned
subsidiary of CAPMAC Holdings, Inc. (CHI), which was sold in 1992 by Citibank
(New York State) to a group of 12 investors led by the following: Dillon Read's
Saratoga Partners II; L.P., an acquisition fund; Caprock Management, Inc.,
representing Rockefeller family interests; Citigrowth Fund, a Citicorp venture
capital group; and CAPMAC senior management and staff. These groups control
approximately 70% of the stock of CHI. CAPMAC had traditionally specialized in
guaranteeing consumer loan and trade receivable asset-backed securities. Under
the new ownership group CAPMAC intends to become involved in the municipal bond
insurance business, as well as their traditional non-municipal business. As of
September 30, 1994 CAPMAC's admitted assets were approximately $198,000,000 and
its policyholders' surplus was approximately $139,000,000.
 
      Connie Lee is a wholly owned subsidiary of College Construction Loan
Insurance Association ('CCLIA'), a government-sponsored enterprise established
by Congress to provide American academic institutions with greater access to
low-cost capital through credit enhancement. Connie Lee, the operating insurance
company, was incorporated in 1987 and began business as a reinsurer of
tax-exempt bonds of colleges, universities, and teaching hospitals with a
concentration on the hospital sector. During the fourth quarter of 1991 Connie
Lee began underwriting primary bond insurance which will focus largely on the
college and university sector. CCLIA's founding shareholders are the U.S.
Department of Education, which owns 36% of CCLIA, and the Student Loan Marketing
Association ('Sallie Mae'), which owns 14%. The other principal owners are:
Pennsylvania Public
 
                                       13
<PAGE>
School Employees' Retirement System, Metropolitan Life Insurance Company, Kemper
Financial Services, Johnson family funds and trusts, Northwestern University,
Rockefeller & Co., Inc. administered trusts and funds, and Stanford University.
Connie Lee is domiciled in the state of Wisconsin and has licenses to do
business in 47 states and the District of Columbia. As of September 30, 1994,
its total admitted assets were approximately $193,000,000 and policyholders'
surplus was approximately $106,000,000.
 
     Financial Guaranty, a New York stock insurance company, is a wholly-owned
subsidiary of FGIC Corporation, which is wholly owned by General Electric
Capital Corporation. The investors in the FGIC Corporation are not obligated to
pay the debts of or the claims against Financial Guaranty. Financial Guaranty
commenced its business of providing insurance and financial guarantees for a
variety of investment instruments in January 1984 and is currently authorized to
provide insurance in 49 states and the District of Columbia. It files reports
with state regulatory agencies and is subject to audit and review by those
authorities. As of September 30, 1994, its total admitted assets were
approximately $2,092,000,000 and its policyholders' surplus was approximately
$872,000,000.
 
     FSA is a monoline property and casualty insurance company incorporated in
New York in 1984. It is a wholly-owned subsidiary of Financial Security
Assurance Holdings Ltd., which was acquired in December 1989 by US West, Inc.,
the regional Bell Telephone Company serving the Rocky Mountain and Pacific
Northwestern states. U.S. West is currently seeking to sell FSA. FSA is licensed
to engage in the surety business in 42 states and the District of Columbia. FSA
is engaged exclusively in the business of writing financial guaranty insurance,
on both tax-exempt and non-municipal securities. As of September 30, 1994, FSA
had policyholders' surplus of approximately $369,000,000 and total admitted
assets of approximately $776,000,000.
 
     MBIA is the principal operating subsidiary of MBIA Inc. The principal
shareholders of MBIA Inc. were originally Aetna Casualty and Surety Company, The
Fund American Companies, Inc., subsidiaries of CIGNA Corporation and Credit
Local de France, CAECL, S.A. These principal shareholders now own approximately
13% of the outstanding common stock of MBIA Inc. following a series of four
public equity offerings over a five-year period. As of September 30, 1994, MBIA
had admitted assets of approximately $3,314,000,000 and policyholders' surplus
of approximately $1,083,000,000.
 
     Insurance companies are subject to regulation and supervision in the
jurisdictions in which they do business under statutes which delegate
regulatory, supervisory and administrative powers to state insurance
commissioners. This regulation, supervision and administration relate, among
other things, to: the standards of solvency which must be met and maintained;
the licensing of insurers and their agents; the nature of and limitations on
investments; deposits of securities for the benefit of policyholders; approval
of policy forms and premium rates; periodic examinations of the affairs of
insurance companies; annual and other reports required to be filed on the
financial condition of insurers or for other purposes; and requirements
regarding reserves for unearned premiums, losses and other matters. Regulatory
agencies require that premium rates not be excessive, inadequate or unfairly
discriminatory. Insurance regulation in many states also includes 'assigned
risk' plans, reinsurance facilities, and joint underwriting associations, under
which all insurers writing particular lines of insurance within the jurisdiction
must accept, for one or more of those lines, risks that are otherwise
uninsurable. A significant portion of the assets of insurance companies is
required by law to be held in reserve against potential claims on policies and
is not available to general creditors.
 
     Although the Federal government does not regulate the business of
insurance, Federal initiatives can significantly impact the insurance business.
Current and proposed Federal measures which may significantly affect the
insurance business include pension regulation (ERISA), controls on medical care
costs, minimum standards for no-fault automobile insurance, national health
insurance, personal privacy protection, tax law changes affecting life insurance
companies or the relative desirability of various personal investment vehicles
and repeal of the current antitrust exemption for the insurance business. (If
this exemption is eliminated, it will substantially affect the way premium rates
are set by all property-liability insurers.) In addition, the Federal government
operates in some cases as a co-insurer with the private sector insurance
companies.
 
     Insurance companies are also affected by a variety of state and Federal
regulatory measures and judicial decisions that define and extend the risks and
benefits for which insurance is sought and provided. These include judicial
redefinitions of risk exposure in areas such as products liability and state and
Federal extension and protection of employee benefits, including pension,
workers' compensation, and disability benefits. These developments may result in
short-term adverse effects on the profitability of various lines of insurance.
Longer-term adverse effects can often be minimized through prompt repricing of
coverages and revision of policy terms. In some instances these developments may
create new opportunities for business growth. All insurance companies write
policies and set premiums based on actuarial assumptions about mortality,
injury, the
 
                                       14
<PAGE>
occurrence of accidents and other insured events. These assumptions, while well
supported by past experience, necessarily do not take account of future events.
The occurrence in the future of unforeseen circumstances could affect the
financial condition of one or more insurance companies. The insurance business
is highly competitive and with the deregulation of financial service businesses,
it should become more competitive. In addition, insurance companies may expand
into non-traditional lines of business which may involve different types of
risks.
 
LITIGATION AND LEGISLATION
 
     To the best knowledge of the Sponsors, there is no litigation pending as of
the Initial Date of Deposit in respect of any Debt Obligations which might
reasonably be expected to have a material adverse effect upon the Fund. At any
time after the Initial Date of Deposit, litigation may be initiated on a variety
of grounds, or legislation may be enacted, with respect to Debt Obligations in
the Fund. Litigation, for example, challenging the issuance of pollution control
revenue bonds under environmental protection statutes may affect the validity of
Debt Obligations or the tax-free nature of their interest. While the outcome of
litigation of this nature can never be entirely predicted, opinions of bond
counsel are delivered on the date of issuance of each Debt Obligation to the
effect that the Debt Obligation has been validly issued and that the interest
thereon is exempt from Federal income tax. In addition, other factors may arise
from time to time which potentially may impair the ability of issuers to make
payments due on Debt Obligations.
 
     Under the Federal Bankruptcy Act, a political subdivision or public agency
or instrumentality of any state, including municipalities, may proceed to
restructure or otherwise alter the terms of its obligations, including those of
the type comprising the Fund's Portfolio. The Sponsors are unable to predict
what effect, if any, this type of legislation might have on the Fund.
 
     From time to time Congress considers proposals to tax the interest on state
and local obligations, such as the Debt Obligations. The Supreme Court clarified
in South Carolina v. Baker (decided April 20, 1988) that the U.S. Constitution
does not prohibit Congress from passing a nondiscriminatory tax on interest on
state and local obligations. This type of legislation, if enacted into law,
could adversely affect an investment in Units. Holders are urged to consult
their own tax advisers.
 
PAYMENT OF THE DEBT OBLIGATIONS AND LIFE OF THE FUND
 
     Because certain of the Debt Obligations from time to time may be redeemed
or prepaid or will mature in accordance with their terms or may be sold under
certain circumstances described herein, no assurance can be given that the Fund
will retain for any length of time its present size and composition. Many of the
Debt Obligations may be subject to redemption prior to their stated maturity
dates pursuant to optional refunding or sinking fund redemption provisions or
otherwise (see Portfolio in Part A). In general, optional refunding redemption
provisions are more likely to be exercised when the offer side evaluation is at
a premium over par than when it is at a discount from par. Generally, the offer
side evaluation of Debt Obligations will be at a premium over par when market
interest rates fall below the coupon rate on the Debt Obligations. The
percentage of the face amount of Debt Obligations which were acquired on the
Date of Deposit at an offer side evaluation in excess of par is set forth under
Investment Summary. Certain Debt Obligations in the Portfolio may be subject to
sinking fund provisions early in the life of the Fund. These provisions are
designed to redeem a significant portion of an issue gradually over the life of
the issue; obligations to be redeemed are generally chosen by lot. Additionally,
the size and composition of the Fund will be affected by the level of
redemptions of Units that may occur from time to time and the consequent sale of
Debt Obligations (see How to Sell--Redemption). Principally, this will depend
upon the number of Holders seeking to sell or redeem their Units and whether or
not the Sponsors continue to reoffer Units acquired by them in the secondary
market. Factors that the Sponsors will consider in the future in determining to
cease offering Units acquired in the secondary market include, among other
things, the diversity of the Portfolio remaining at that time, the size of the
Fund relative to its original size, the ratio of Fund expenses to income, the
Fund's current and long-term returns, the degree to which Units may be selling
at a premium over par relative to other funds sponsored by the Sponsors and the
cost of maintaining a current prospectus for the Fund. These factors may also
lead the Sponsors to seek to terminate the Fund earlier than would otherwise be
the case (see Trust Indenture).
 
LIQUIDITY
 
     Certain of the Debt Obligations may have been guaranteed or similarly
secured by insurance companies or other corporations or entities. The guarantee
or similar commitment may constitute a security (a 'Restricted Security') that
cannot, in the opinion of counsel, be sold publicly by the Trustee without
registration under the
 
                                       15
<PAGE>
Securities Act of 1933, as amended, or similar provisions of law subsequently
enacted. The Sponsors nevertheless believe that, should a sale of these Debt
Obligations be necessary in order to meet redemption, the Trustee should be able
to consummate a sale with institutional investors. Up to 40% of the Portfolio
may consist of Debt Obligations purchased from various banks and thrifts and
other Debt Obligations with guarantees which may constitute Restricted
Securities.
 
     The Portfolio may contain certain Debt Obligations purchased directly from
issuers. These Debt Obligations are generally issued under bond resolutions or
trust indentures providing for the issuance of bonds in publicly saleable
denominations (usually $100,000), may be sold free of the registration
requirements of the Securities Act of 1933 and are otherwise structured in
contemplation of ready marketability. In addition, the Sponsors generally obtain
letters of intention to repurchase or to use best efforts to remarket these Debt
Obligations from the issuers, the placement agents acting in connection with
their sale or the entities providing the additional credit support, if any.
These letters do not express legal obligations; however, in the opinion of the
Sponsors, these Debt Obligations should be readily marketable.
 
TAX EXEMPTION
 
     In the opinion of bond counsel rendered on the date of issuance of each
Debt Obligation, the interest on each Debt Obligation is excludable from gross
income under existing law for regular Federal income tax purposes (except in
certain circumstances depending on the Holder) but may be subject to state and
local taxes and may be a preference item for purposes of the Alternative Minimum
Tax (see Portfolio in Part A; Taxes below). As discussed under Taxes below,
interest on some or all of the Debt Obligations may become subject to regular
Federal income tax, perhaps retroactively to their date of issuance, as a result
of changes in Federal law or as a result of the failure of issuers (or other
users of the proceeds of the Debt Obligations) to comply with certain ongoing
requirements.
 
     Moreover, the Internal Revenue Service has announced an expansion of its
examination program with respect to tax-exempt bonds. The expanded examination
program will consist of, among other measures, increased enforcement against
abusive transactions, broader audit coverage (including the expected issuance of
audit guidelines) and expanded compliance achieved by means of expected
revisions to the tax-exempt bond information return forms. At this time, it is
uncertain whether the tax exempt status of any of the Debt Obligations would be
affected by such proceedings, or whether such effect, if any, would be
retroactive.
 
     In certain cases, a Debt Obligation may provide that if the interest on the
Debt Obligation should ultimately be determined to be taxable, the Debt
Obligation would become due and payable by its issuer, and, in addition, may
provide that any related letter of credit or other security could be called upon
if the issuer failed to satisfy all or part of its obligation. In other cases,
however, a Debt Obligation may not provide for the acceleration or redemption of
the Debt Obligation or a call upon the related letter of credit or other
security upon a determination of taxability. In those cases in which a Debt
Obligation does not provide for acceleration or redemption or in which both the
issuer and the bank or other entity issuing the letter of credit or other
security are unable to meet their obligations to pay the amounts due on the Debt
Obligation as a result of a determination of taxability, the Trustee would be
obligated to sell the Debt Obligation and, since it would be sold as a taxable
security, it is expected that it would have to be sold at a substantial discount
from current market price. In addition, as mentioned above, under certain
circumstances Holders could be required to pay income tax on interest received
prior to the date on which the interest is determined to be taxable.
 
HOW TO BUY
 
     Units are available from any of the Underwriters and other broker-dealers
at the Public Offering Price (including the applicable sales charge) plus a
proportionate share of any cash held by the Fund in the Capital Account (unless
allocated to the purchase of specific securities) and net accrued and
undistributed interest. Because both the value of Securities and accrued
interest change, the Public Offering Price varies each Business Day.
 
PUBLIC OFFERING PRICE
 
     In the initial offering period, the Public Offering Price is based on the
next offer side evaluation of the Securities, and includes a sales charge based
on the number of Units of a single Fund or Trust purchased on the same or any
preceding day by a single purchaser. See Initial Offering Sales Charge Schedule
in Appendix B. The purchaser or his dealer must notify the Sponsors at the time
of purchase of any previous purchase to be aggregated and supply sufficient
information to permit confirmation of eligibility; acceptance of the purchase
order is subject
 
                                       16
<PAGE>
to such confirmation. Purchases of Fund Units may not be aggregated with
purchases of any other unit trust. This procedure may be amended or terminated
at any time without notice.
 
     In the secondary market (after the initial offering period), the Public
Offering Price is based on the next bid side evaluation of the Securities, and
includes a sales charge based (a) on the number of Units of the Fund and any
other Series of Municipal Investment Trust Fund purchased in the secondary
market on the same day by a single purchaser (see Secondary Market Sales Charge
Schedule in Appendix B) and (b) the maturities of the underlying Securities (see
Effective Sales Charge in Appendix B). To qualify for a reduced sales charge,
the dealer must confirm that the sale is to a single purchaser or is purchased
for its own account and not for distribution. For these purposes, Units held in
the name of the purchaser's spouse or child under 21 years of age are deemed to
be purchased by a single purchaser. A trustee or other fiduciary purchasing
securities for a single trust estate or single fiduciary account is also
considered a single purchaser.
 
     In the secondary market, the Public Offering Price is further reduced
depending on the maturities of the various bonds in the Portfolio, by
determining a sales charge percentage for each bond, as stated in Effective
Sales Charge in Appendix B. The sales charges so determined, multiplied by the
bid side evaluation of the Securities, are aggregated and the total divided by
the number of Units outstanding to determine the Effective Sales Charge. On any
purchase, the Effective Sales Charge is multiplied by the applicable secondary
market sales charge percentage (depending on the number of Units purchased) in
order to determine the sales charge component of the Public Offering Price.
 
     Employees of certain Sponsors and Sponsor affiliates and non-employee
directors of Merrill Lynch & Co. Inc. may purchase Units at any time at prices
including a sales charge of not less than $5 per Unit.
 
SECURITIES EVALUATIONS
 
     The Public Offering Price is based on the evaluation of Securities in the
Fund, at the offer or bid side as described above, at the Evaluation Time next
following receipt of the order. Evaluations are determined by the Evaluator as
described under Redemption on each Business Day (this excludes Saturdays,
Sundays and the following holidays as observed by the New York Stock Exchange:
New Year's Day, Washington's Birthday, Good Friday, Memorial Day, Independence
Day, Labor Day, Thanksgiving and Christmas).
 
ACCRUED INTEREST
 
     Net accrued interest is added to the Public Offering Price, the Sponsors'
Repurchase Price and the Redemption Price per Unit. This represents the interest
accrued on the Securities, net of Fund expenses, from the Initial Date of
Deposit to, but not including, the settlement date for Units (less any prior
distributions of interest income to Holders). Securities deposited also carry
accrued but unpaid interest up to the Initial Date of Deposit. To avoid having
Holders pay this additional accrued interest (which earns no return) when they
purchase Units, the Trustee advances and distributes this amount to the
Sponsors; it recovers this advance from interest received on the Debt
Obligations. Because of varying interest payment dates on the Securities,
accrued interest at any time will exceed the interest actually received by the
Fund.
 
CERTIFICATES
 
     Certificates for Units are issued upon request, and are transferable upon
payment of any taxes or governmental charges and compliance with the
requirements for redeeming Certificates (see Redemption). Certain Sponsors
collect additional charges for registering and shipping Certificates to
purchasers. Lost or mutilated Certificates can be replaced upon delivery of
satisfactory indemnity and payment of costs.
 
COMPARISON OF PUBLIC OFFERING PRICE, SPONSORS' INITIAL REPURCHASE PRICE,
SECONDARY MARKET REPURCHASE PRICE AND REDEMPTION PRICE
 
     On the business day prior to the Initial Date of Deposit the Public
Offering Price per Unit (which includes the sales charge) and the Sponsors'
Initial Repurchase Price per Unit (each based on the offer side evaluation of
the Securities in the Fund--see above) exceeded the Sponsors' Repurchase Price
and the Redemption Price per Unit (each based on the bid side evaluation
thereof--see How to Sell--Redemption) by the amounts set forth under the
Investment Summary.
 
     The initial Public Offering Price per Unit of the Trust and the Initial
Repurchase Price are based on the offer side evaluations of the Securities. The
secondary market Public Offering Price and the Sponsors' Repurchase Price in the
secondary market are based on bid side evaluations of the Securities. In the
past, the bid prices of publicly offered tax-exempt issues have been lower than
the offer prices by as much as 3 1/2% or more of face
 
                                       17
<PAGE>
amount in the case of inactively traded issues and as little as  1/2 of 1% in
the case of actively traded issues, but the difference between the offer and bid
prices has averaged between 1 and 2% of face amount; the difference on the day
before the date of this Prospectus is stated in a note to the Portfolio.
 
HOW TO SELL
 
SPONSORS' MARKET FOR UNITS
 
     Holders can cash in Units at any time without a fee. The Sponsors (although
not obligated to do so) normally repurchase any Units offered for sale, at the
repurchase price next computed after receipt of the order. Because of the sales
charge and fluctuations in the market value of the Securities (among other
reasons) the repurchase price may be less than the investor's cost for the
Units. Holders disposing of Units should consult their financial professional as
to current market prices to determine if other broker-dealers or banks offer
higher prices for those Units.
 
     The Sponsors may discontinue this market without prior notice if the supply
of Units exceeds demand or for other business reasons; in that event, the
Sponsors may still purchase Units at the redemption price as a service to
Holders. Although the Sponsors may reoffer Units repurchased, alternatively they
may redeem those Units; see Redemption for a description of certain consequences
of redemptions to remaining Holders.
 
REDEMPTION
 
     Holders may redeem Units by tendering to the Trustee Certificates (if
issued) or a request for redemption. Certificates must be properly endorsed or
accompanied by a written transfer instrument. Each Holder must sign the
Certificate, transfer instrument or request exactly as the name appears on the
face of the Certificate; signatures must be guaranteed by an eligible guarantor
institution or in another manner acceptable to the Trustee. In certain
instances, additional documents may be required such as a certificate of death,
trust instrument, certificate of corporate authority or appointment as executor,
administrator or guardian. If the Sponsors are maintaining a market for Units,
they will purchase any Units tendered at the price described in the preceding
section. If the Sponsors do not purchase Units tendered, the Trustee is
authorized in its discretion to sell Units in the over-the-counter market if it
believes it will obtain for the redeeming Holder a higher net price.
 
     Redemptions may be suspended or payment postponed in limited circumstances:
(1) if the New York Stock Exchange is closed other than for customary weekend
and holiday closings; (2) if the SEC determines that trading on that Exchange is
restricted or an emergency exists making disposal or evaluation of the
Securities not reasonably practicable; or (3) for any other period which the SEC
by order permits.
 
     On the seventh calendar day after tender (the preceding Business Day if the
seventh day is not a Business Day), the Holder will be mailed an amount per Unit
equal to the Redemption Price Per Unit at the Evaluation Time next following
receipt of the tender. As noted above, this price may be more or less than the
cost of those Units.
 
     Redemption Price per Unit is computed each Business Day by adding (a) the
aggregate bid side evaluation of the Securities, (b) cash in the Fund (excluding
cash held to pay contracts to purchase Securities or in a reserve account), (c)
accrued but unpaid interest on the Securities up to but not including the
payment date and (d) the aggregate value of any other Fund assets; deducting (v)
unpaid taxes or other governmental charges, (w) accrued but unpaid Fund
expenses, (x) unreimbursed Trustee advances, (y) cash held to redeem Units or
for distribution to Holders and (z) the aggregate value of any other Fund
liabilities; and dividing the result by the Units outstanding as of the
computation. Evaluations of Securities are determined by the Evaluator as
follows: During the initial syndicate offering period for any Debt Obligation,
its evaluation will be at the syndicate offer price unless the Evaluator
determines that this price does not accurately reflect the market value. For
Securities traded over-the-counter, the evaluation is generally based on the
closing sales prices on that market (unless the Evaluator deems these prices
inappropriate for valuation). If closing sales prices are not available, the
evaluation is generally determined on the basis of current bid or offer prices
for the Securities or (if not available) for comparable securities or by
appraising the value or any combination of these methods.
 
     The value of any insurance is reflected in the market value of any Insured
Debt Obligation. The Sponsors believe that this is a fair method of valuing the
Insured Debt Obligations and the insurance.
 
     If cash is not available in the Fund's Income and Capital Accounts to pay
redemptions, the Trustee is authorized to sell Securities. Securities to be sold
will be selected by the Agent for the Sponsors in accordance with procedures
specified in the Indenture, based on market and credit factors that they
determine are in the best interests of the Fund. The Sponsors are authorized to
specify minimum face amounts in which Securities are
 
                                       18
<PAGE>
sold, to obtain a better price for the Fund. When Securities are sold (or mature
or are called), the size and diversity of the Fund is reduced. Sales to meet
redemptions are often made at times when Securities would not otherwise be sold,
and may result in lower prices than might be realized otherwise.
 
INCOME AND DISTRIBUTIONS
 
INCOME
 
     Income is received by the Fund upon semi-annual payments of interest on the
Debt Obligations held in the Portfolio. Some of the Debt Obligations may be
purchased on a when, as and if issued basis or may have a delayed delivery (see
Portfolio). Since interest on these Debt Obligations does not begin to accrue
until the date of delivery to the Fund, in order to provide tax-exempt income to
the Holders for this non-accrual period, the Trustee's Annual Fee and Expenses
is reduced by the interest that would have accrued on these Debt Obligations
between the initial settlement date for Units and the delivery dates of the Debt
Obligations. This eliminates reduction in Monthly Income Distributions. Should
when-issued Debt Obligations be issued later than expected, the fee reduction
will be increased correspondingly. If the amount of the Trustee's Annual Fee and
Expenses is insufficient to cover the additional accrued interest, the Sponsors
will treat the contracts as Failed Debt Obligations. As the Trustee is
authorized to draw on the letter of credit deposited by the Sponsors before the
settlement date for these Debt Obligations and deposit the proceeds in an
account for the Fund on which it pays no interest, its use of these funds
compensates the Trustee for the reduction described above.
 
RETURNS
 
     Estimated Current Return represents annual cash to be received from
interest-bearing Debt Obligations in the Portfolio (net of estimated annual
expenses) divided by the Public Offering Price (including sales charge).
 
     Estimated Long-Term Return is a measure of the estimated return earned over
the estimated life of the Fund. This represents an average of the yields to
maturity (or earliest call date for obligations trading at a premium over the
call price) of the Debt Obligations in the Portfolio, calculated in accordance
with accepted bond practice and adjusted to reflect expenses and sales charges.
Bonds are customarily offered on a 'yield price' basis, which reflects
computation of yield to maturity (or call date) and not only the interest
payable but amortization or accretion to a specified date of any premium over or
discount from par (maturity) value in the bond's purchase price. In calculating
Estimated Long Term Return, the average yield for the Portfolio is derived by
weighting each Debt Obligation's yield by its market value and the time
remaining to the call or maturity date depending on how the Debt Obligation is
priced. The average Portfolio yield is then adjusted to reflect estimated
expenses and the maximum sales charge. This calculation does not reflect certain
delays in distributing income nor the timing of other receipts and distributions
on Units; depending on maturities, it may therefore overstate or understate the
impact of sales charges. Both of these factors may result in a lower figure.
 
     Both Estimated Current Return and Estimated Long Term Return can fluctuate
with changes in Portfolio composition, in market value of the Debt Obligations,
in Fund expenses and sales charges; these returns therefore can vary materially
from the figures at the time of purchase. Any difference between Estimated
Current Return and Estimated Long Term Return will probably fluctuate at least
as frequently. No return estimate can be predictive of an investor's actual
return because an investor's actual return will depend on many factors,
including the value of the underlying Debt Obligations when the investor
purchases and sells Units of the Fund and the period of time the investor holds
the Units. Therefore, Estimated Current Return and Estimated Long Term Return
are designed to be comparative rather than predictive. A yield calculation which
is more comparable to an individual bond may be higher or lower than Estimated
Current Return or Estimated Long Term Return which are more comparable to return
calculations used by other investment products.
 
FUND ACCOUNTS
 
     Interest received is credited to an Income Account and other receipts to a
Capital Account. A Reserve Account may be created by withdrawing from the Income
or Capital Accounts amounts considered appropriate by the Trustee to reserve for
any material amount that may be payable out of the Fund. Monies held by the
Trustee in the various accounts for the Fund do not bear interest.
 
DISTRIBUTIONS
 
     The initial estimated net annual interest rate per Unit is stated in
Investment Summary. This is based on $1,000 face amount per Unit, after
deducting estimated annual Fund expenses. The rate will change as Securities
mature, are called or sold or otherwise disposed of, as Replacement Securities
are deposited and as Fund expenses
 
                                       19
<PAGE>
change. Because the Portfolio is not actively managed, income distributions may
not be affected by changes in interest rates. Subject to the financial
conditions of the issuers of the Securities, the amount of income should be
substantially maintained as long as the Portfolio remains unchanged; however,
optional bond redemptions or other Portfolio changes may occur more frequently
when interest rates decline, which would result in early return of principal.
 
     Each Unit receives an equal share of monthly distributions of interest
income and any principal distributed, substantially equal to the proportionate
income during the month preceding the Record Day less estimated expenses.
Interest on the Debt Obligations is received by the Fund on a semi-annual or
annual basis. Therefore, it takes several months after the Initial Date of
Deposit for the Trustee to receive sufficient interest payments on the
Securities to begin distributions to Holders; see Investment Summary for
estimates of the first and following Monthly Income Distributions. When a
Security is sold, redeemed or otherwise disposed of, accrued interest is
received by the Fund. Further, because interest on the Securities is not
received by the Fund at a constant rate throughout the year, any Monthly Income
Distribution may be more or less than the interest actually received. To
eliminate fluctuations in the Monthly Income Distribution, the Trustee will
advance amounts necessary to provide approximately equal distributions; it will
be reimbursed, without interest, from interest received on the Securities.
However, the amount of Monthly Income Distributions will change over time as
described above.
 
     Along with the Monthly Income Distributions, the Trustee will distribute
the Holder's pro rata share of the distributable cash balance of the Capital
Account, computed as of the close of business on the preceding Record Day (if at
least equal to the Minimum Capital Distribution stated in Investment Summary).
Principal proceeds received from disposition of any Security after a Record Day
and prior to the related Distribution Day will be held in the Capital Account
subject to distribution on the second following Distribution Day. The first
distribution for a purchaser of Units between a Record Day and the related
Distribution Day will be made on the second following Distribution Day.
 
     Any funds held to acquire Replacement Securities which have not been used
to purchase Securities within 90 days after the initial deposit, unless promptly
used to purchase Replacement Securities, will be distributed to Holders together
with the attributable sales charge and interest attributable to those funds.
This interest will not be exempt from tax.
 
INVESTMENT ACCUMULATION PROGRAM
 
     Distributions of interest and any principal or premium received by the Fund
will be paid in cash unless the Holder elects to have these distributions
reinvested without sales charge in the Municipal Fund Accumulation Program, Inc.
(the 'Program'). The Program is an open-end management investment company whose
investment objective is to obtain income that is exempt from regular Federal
income taxes through investment in a diversified portfolio consisting primarily
of state, municipal and public authority debt obligations rated A or better or
with comparable credit characteristics. Reinvesting compounds earnings free from
Federal tax. Holders participating in the Program will be subject to State and
local income taxes to the same extent as if the distributions had been received
in cash, and most of the income on the Program is subject to State and local
income taxes. For more complete information about the Program, including charges
and expenses, return the enclosed form for a prospectus. Read it carefully
before you decide to participate. Notice of election to participate must be
received by the Trustee in writing at least ten days before the Record Day for
the first distribution to which the notice is to apply.
 
FUND EXPENSES
 
     See Trustee's Annual Fee and Expenses under Investment Summary for
estimated annual Fund expenses; if actual expenses exceed the estimate, the
excess will be borne by the Fund. The annual fee solely for the Trustee's
services is $0.70 per $1,000 face amount of Debt Obligations, payable in monthly
installments. The Trustee also benefits when it holds cash for the Fund in
non-interest bearing accounts. Possible additional charges include Trustee fees
and expenses for extraordinary services, costs of indemnifying the Trustee and
the Sponsors to the extent permitted by law and the Indenture, costs of action
taken to protect the Fund and other legal fees and expenses, Fund termination
expenses and any governmental charges. The Trustee has a lien on Fund assets to
secure reimbursement of these amounts, and may sell Securities for this purpose.
The Sponsors receive an annual fee for Portfolio supervisory services at the
maximum stated under Investment Summary, based on the initial face amount in any
calendar year. While this may exceed their costs of providing these services to
the Fund, the total supervision fees from all Municipal Investment Trust Fund
Series will not exceed their costs for these services to all of those Series
during any calendar year. The Sponsors may also be reimbursed for their costs of
 
                                       20
<PAGE>
providing bookkeeping and administrative services to the Fund. The Trustees's,
Sponsors' and Evaluators fees may be adjusted for inflation without Holders'
approval.
 
LOW COSTS
 
     All expenses in establishing the Fund, including the cost of the initial
preparation and printing of documents relating to the Fund, cost of the initial
evaluation, the initial fees and expenses of the Trustee, legal expenses,
advertising and selling expenses and any other out-of-pocket expenses, will be
paid from the Underwriting Account at no charge to the Fund.
 
     Sales charges on Defined Asset Funds range from under 1.0% to 5.5%. This
may be less than you might pay to buy a comparable mutual fund. Defined Asset
Funds have no 12b-1 or back-end load fees. These Funds can be a cost-effective
way to purchase and hold investments. Annual operating expenses are generally
lower than for managed funds. Because Defined Funds have no management fees,
limited transaction costs and no ongoing marketing expenses, operating expenses
are generally less than 0.25% a year. When compounded annually, small
differences in expense ratios can make a big difference in expenses.
 
PERFORMANCE
 
     Information on the performance of this Fund for various periods, on the
basis of changes in Unit price plus the amount of income and principal
distributions reinvested, may be included from time to time in advertisements,
sales literature, reports and other information furnished to current or
prospective investors. Total return figures are not averaged, and may not
reflect deduction of the sales charge, which would decrease the return. Average
annualized return figures reflect deduction of the maximum sales charge. No
provision is made for any income taxes payable. Past performance may not be
indicative of future results. The Fund is not actively managed. Unit price and
return fluctuate with the value of the Bonds in the Portfolio, so there may be a
gain or loss when Units are sold.
 
     Fund performance may be compared to performance on the same basis (with
distributions reinvested) of Moody's Municipal Bond Averages or performance data
from publications such as Lipper Analytical Services, Inc., Morningstar
Publications, Inc., Money Magazine, The New York Times, U.S. News and World
Report, Barron's Business Week, CDA Investment Technology, Inc., Forbes Magazine
or Fortune Magazine. As with other performance data, performance comparisons
should not be considered representative of the Fund's relative performance for
any future period.
 
EXCHANGE OPTION
 
     Holders may exchange Units (except of Short Intermediate Series) at a
reduced sales charge for units of one or more series of the types listed in
Appendix C ('Exchange Funds'). This includes the current maximum sales charge
and exchange fee for each type of Exchange Fund. (If units held less than five
months are exchanged for a series with a higher regular sales charge, the Holder
will pay the difference between the sales charges paid on the units exchanged
and the regular sales charge for the units acquired, if greater than the
exchange fee.)
 
      The current return from taxable fixed income securities is normally higher
than that available from tax exempt fixed income securities. Certain of the
Exchange Funds do not provide for periodic payments of interest and are best
suited for purchase by IRA's, Keogh plans, pension funds or other tax-deferred
retirement plans. Consequently, some of the Exchange Funds may be inappropriate
investments for some Holders. Appendix C lists certain characteristics of each
type of Exchange Fund which a Holder should consider in determining whether it
would be an appropriate investment and therefore an appropriate exchange for
Units of the Fund.
 
     Holders of Exchange Funds can similarly exchange units of those funds for
Units of the Fund. However, units of series offered at a maximum applicable
sales charge below 3.50% of the public offering price (including certain series
of Exchange Funds listed in Appendix C) are not eligible for exchange except
that Holders may exchange Units of the Fund for Freddie Mac or Select Ten Series
during their initial offering periods. Holders of other registered unit
investment trusts originally offered at a maximum applicable sales charge of at
least 3.0% ('Conversion Trusts') may similarly acquire Units at the exchange
fee.
 
     To make an exchange, a Holder should contact his financial professional to
find out what suitable Exchange Funds are available and to obtain a prospectus.
The Holder may only acquire units of an Exchange Fund in which the Sponsors
maintain a secondary market and which are lawfully available for sale in the
state where the Holder resides. Except for the sales charge, an exchange is like
any other purchase and sale of units in the secondary market. An exchange is a
taxable event normally requiring recognition of any gain or loss on the units
exchanged. However, the Internal Revenue Service may seek to disallow a loss if
the portfolio of the units
 
                                       21
<PAGE>
acquired is not materially different from the portfolio of the units exchanged;
Holders should consult their own tax advisers. If the proceeds of units
exchanged is insufficient to acquire a whole number of Exchange Fund units, the
Holder may pay the difference in cash (not exceeding the price of a single unit
acquired).
 
     As the Sponsors are not obligated to maintain a secondary market in any
series, there can be no assurance that units of a desired series will be
available for exchange. The Exchange Option may be amended or terminated by the
Sponsors at any time, without notice to Holders.
 
TAXES
 
     The following discussion addresses only the tax consequences of Units held
as capital assets and does not address the tax consequences of Units held by
dealers, financial institutions or insurance companies.
 
     In the opinion of Davis Polk & Wardwell, special counsel for the Sponsors,
under existing law:
 
        The Fund is not an association taxable as a corporation for Federal
     income tax purposes, and income received by the Fund will be treated as the
     income of the Holders in the manner set forth below.
 
        Each Holder will be considered the owner of a pro rata portion of each
     Debt Obligation in the Fund under the grantor trust rules of Sections
     671-679 of the Internal Revenue Code of 1986, as amended (the 'Code'). In
     order to determine the face amount of a Holder's pro rata portion of each
     Debt Obligation on the Initial Date of Deposit, see Face Amount under
     Portfolio. The total cost to a Holder of his Units, including sales
     charges, is allocated to his pro rata portion of each Debt Obligation, in
     proportion to the fair market values thereof on the date the Holder
     purchases his Units, in order to determine his tax basis for his pro rata
     portion of each Debt Obligation. In order for a Holder who purchases his
     Units on the Initial Date of Deposit to determine the fair market value of
     his pro rata portion of each Debt Obligation on such date, see Cost of Debt
     Obligations to Fund under Portfolio.
 
        Each Holder will be considered to have received the interest on his pro
     rata portion of each Debt Obligation when interest on the Debt Obligation
     is received by the Fund. In the opinion of bond counsel (delivered on the
     date of issuance of the Debt Obligation), such interest will be excludable
     from gross income for regular Federal income tax purposes (except in
     certain limited circumstances referred to below). Amounts received by the
     Fund pursuant to a bank letter of credit, guarantee or insurance policy
     with respect to payments of principal, premium or interest on a Debt
     Obligation will be treated for Federal income tax purposes in the same
     manner as if such amounts were paid by the issuer of the Debt Obligation.
 
        The Fund may contain Debt Obligations which were originally issued at a
     discount ('original issue discount'). The following principles will apply
     to each Holder's pro rata portion of any Debt Obligation originally issued
     at a discount. In general, original issue discount is defined as the
     difference between the price at which a debt obligation was issued and its
     stated redemption price at maturity. Original issue discount on a
     tax-exempt obligation issued after September 3, 1982 is deemed to accrue as
     tax-exempt interest over the life of the obligation under a formula based
     on the compounding of interest. Original issue discount on a tax-exempt
     obligation issued before July 2, 1982 is deemed to accrue as tax-exempt
     interest ratably over the life of the obligation. Original issue discount
     on any tax-exempt obligation issued during the period beginning July 2,
     1982 and ending September 3, 1982 is also deemed to accrue as tax-exempt
     interest over the life of the obligation, although it is not clear whether
     such accrual is ratable or is determined under a formula based on the
     compounding of interest. If a Holder's tax basis for his pro rata portion
     of a Debt Obligation issued with original issue discount is greater than
     its 'adjusted issue price' but less than its stated redemption price at
     maturity (as may be adjusted for certain payments), the Holder will be
     considered to have purchased his pro rata portion of the Debt Obligation at
     an 'acquisition premium'. A Holder's adjusted tax basis for his pro rata
     portion of the Debt Obligation issued with original issue discount will
     include original issue discount accrued during the period such Holder held
     his Units. Such increases to the Holder's tax basis in his pro rata portion
     of the Debt Obligation resulting from the accrual of original issue
     discount, however, will be reduced by the amortization of any such
     acquisition premium.
 
        If a Holder's tax basis for his pro rata portion of a Debt Obligation
     exceeds the redemption price at maturity thereof (subject to certain
     adjustments), the Holder will be considered to have purchased his pro rata
     portion of the Debt Obligation with 'amortizable bond premium'. The Holder
     is required to amortize such premium over the term of the Debt Obligation.
     Such amortization is only a reduction of basis for his pro rata portion of
     the Debt Obligation and does not result in any deduction against the
     Holder's income. Therefore, under some circumstances, a Holder may
     recognize taxable gain when his pro rata portion of a Debt Obligation is
     disposed of for an amount equal to or less than his original tax basis
     therefor.
 
                                       22
<PAGE>
        A Holder will recognize taxable gain or loss when all or part of his pro
     rata portion of a Debt Obligation is disposed of by the Fund for an amount
     greater or less than his adjusted tax basis. Any such taxable gain or loss
     will be capital gain or loss, except that any gain from the disposition of
     a Holder's pro rata portion of a Debt Obligation acquired by the Holder at
     a 'market discount' (i.e., where the Holder's original tax basis for his
     pro rata portion of the Debt Obligation (plus any original issue discount
     which will accrue thereon until its maturity) is less than its stated
     redemption price at maturity) would be treated as ordinary income to the
     extent the gain does not exceed the accrued market discount. Capital gains
     are generally taxed at the same rate as ordinary income. However, the
     excess of net long-term capital gains over net short-term capital losses
     may be taxed at a lower rate than ordinary income for certain noncorporate
     taxpayers. A capital gain or loss is long-term if the asset is held for
     more than one year and short-term if held for one year or less. The
     deduction of capital losses is subject to limitations. A Holder will also
     be considered to have disposed of all or part of his pro rata portion of
     each Debt Obligation when he sells or redeems all or some of his Units.
 
        Under Section 265 of the Code, a Holder (except a corporate Holder) is
     not entitled to a deduction for his pro rata share of fees and expenses of
     the Fund, because the fees and expenses are incurred in connection with the
     production of tax-exempt income. Further, if borrowed funds are used by a
     Holder to purchase or carry Units of the Fund, interest on this
     indebtedness will not be deductible for Federal income tax purposes. In
     addition, under rules used by the Internal Revenue Service, the purchase of
     Units may be considered to have been made with borrowed funds even though
     the borrowed funds are not directly traceable to the purchase of Units.
 
        Under the income tax laws of the State and City of New York, the Fund is
     not an association taxable as a corporation and income received by the Fund
     will be treated as the income of the Holders in the same manner as for
     Federal income tax purposes, but will not necessarily be tax-exempt.
 
        Holders will be taxed in the manner described above regardless of
     whether the distributions from the Fund are actually received by the
     Holders or are automatically reinvested in the Municipal Fund Accumulation
     Program, Inc.
 
        From time to time proposals are introduced in Congress and state
     legislatures which, if enacted into law, could have an adverse impact on
     the tax-exempt status of the Debt Obligations. It is impossible to predict
     whether any legislation in respect of the tax status of interest on the
     Debt Obligations may be proposed and eventually enacted at the Federal or
     state level.
 
        The foregoing discussion relates only to Federal and certain aspects of
     New York State and City income taxes. Depending on their state of
     residence, Holders may be subject to state and local taxation and should
     consult their own tax advisers in this regard.
 
                                    *  *  *
 
     The Fund may include Debt Obligations issued after August 7, 1986 (see
Investment Summary--Taxation and Portfolio in Part A). Interest (including any
original issue discount) on certain of these Debt Obligations will be a
preference item for purposes of the alternative minimum tax ('AMT'). In
addition, a corporate Holder should be aware that the accrual or receipt of
tax-exempt interest not subject to the AMT may give rise to an alternative
minimum tax liability (or increase an existing liability) because the interest
income will be included in the corporation's 'adjusted current earnings' for
purposes of the adjustment to alternative minimum taxable income required by
Section 56(g) of the Code, and will be taken into account for purposes of the
environmental tax on corporations under Section 59A of the Code, which is based
on alternative minimum taxable income. In addition, interest on the Debt
Obligations must be taken into consideration in computing the portion, if any,
of social security benefits that will be included in an individual's gross
income and subject to Federal income tax. Holders are urged to consult their own
tax advisers concerning an investment in Units.
 
     At the time of issuance of each Debt Obligation, an opinion relating to the
validity of the Debt Obligation and to the exemption of interest thereon from
regular Federal income taxes was or will be rendered by bond counsel. Neither
the Sponsors nor Davis Polk & Wardwell have made or will make any review of the
proceedings relating to the issuance of the Debt Obligations or the basis for
these opinions. The tax exemption is dependent upon the issuer's (and other
users') compliance with certain ongoing requirements, and the opinion of bond
counsel assumes that these requirements will be complied with. However, there
can be no assurance that the issuer (and other users) will comply with these
requirements, in which event the interest on the Debt Obligation could be
determined to be taxable retroactively from the date of issuance.
 
     In the case of certain Debt Obligations, the opinions of bond counsel
indicate that interest on these Debt Obligations received by a 'substantial
user' of the facilities being financed with the proceeds of such Debt
 
                                       23
<PAGE>
Obligations, or persons related thereto, for periods while such Debt Obligations
are held by such a user or related person, will not be exempt from regular
Federal income taxes, although interest on such Debt Obligations received by
others would be exempt from regular Federal income taxes. 'Substantial user' is
defined under U.S. Treasury Regulations to include only a person whose gross
revenue derived with respect to the facilities financed by the issuance of bonds
is more than 5% of the total revenue derived by all users of these facilities,
or who occupies more than 5% of the usable area of these facilities or for whom
these facilities or a part thereof were specifically constructed, reconstructed
or acquired. 'Related persons' are defined to include certain related natural
persons, affiliated corporations, partners and partnerships.
 
     After the end of each calendar year, the Trustee will furnish to each
Holder an annual statement containing information relating to the interest
received by the Fund on the Debt Obligations, the gross proceeds received by the
Fund from the disposition of any Debt Obligation (resulting from redemption or
payment at maturity of any Debt Obligation or the sale by the Fund of any Debt
Obligation), and the fees and expenses paid by the Fund. The Trustee will also
furnish annual information returns to each Holder and to the Internal Revenue
Service. Holders are required to report to the Internal Revenue Service the
amount of tax-exempt interest received during the year.
 
ADMINISTRATION OF THE FUND
 
RECORDS
 
     The Trustee keeps a register of the names, addresses and holdings of all
Holders. The Trustee also keeps records of the transactions of the Fund,
including a current list of the Securities and a copy of the Indenture, which
may be inspected by Holders at reasonable times during business hours.
 
REPORTS TO HOLDERS
 
     With each distribution, the Trustee includes a statement of the interest
and any other receipts being distributed. Within five days after deposit of Debt
Obligations in exchange or substitution for Debt Obligations (or contracts)
previously deposited, the Trustee will send a notice to each Holder, identifying
both the Debt Obligations removed and the Replacement Securities deposited. The
Trustee sends each record Holder an annual report summarizing transactions in
the Fund's accounts and amounts distributed during the year and Securities held,
number of Units outstanding and Redemption Price at year end, among other
matters. Holders may obtain copies of Securities evaluations from the Trustee to
enable them to comply with Federal and state tax reporting requirements. Fund
accounts are audited annually by independent accountants selected by the
Sponsors; audited financial statements are available on request.
 
TRUST INDENTURE
 
     The Fund is a 'unit investment trust' created under New York law by a Trust
Indenture (the 'Indenture') among the Sponsors, the Trustee and the Evaluator.
This Prospectus summarizes various provisions of the Indenture, but each
statement herein is qualified in its entirety by reference to the Indenture.
 
     The Indenture may be amended by the Sponsors and the Trustee, without
consent by Holders: (a) to cure ambiguities or to correct or supplement any
defective or inconsistent provision, (b) to make any amendment required by the
SEC or other governmental agency, or (c) to make any other change not materially
adverse to the interest of Holders (as determined in good faith by the
Sponsors). The Indenture may also be amended upon consent of Holders of 51% of
the Units. No amendment may reduce the interest of any Holder in the Fund
without the Holder's consent or reduce the percentage of Units required to
consent to any amendment without unanimous consent of Holders. Holders will be
notified on the substance of any amendment.
 
     The Fund will be terminated, and any remaining Securities sold, no later
than the mandatory termination date specified in Investment Summary. It will
terminate earlier upon the disposition of the last Security, upon direction of
the Sponsors if total assets are below the minimum value specified in Investment
Summary or upon consent of Holders of 51% of the Units. The Trustee will notify
each Holder in writing within a reasonable time before termination, specifying
when Certificates should be surrendered. After termination, the Trustee will
sell any remaining Securities and distribute (by check mailed to the Holder)
each Holder's pro rata interest in the Fund, net of any unpaid fees, taxes,
governmental and other charges and subject to surrender of any outstanding
Certificate by the Holder.
 
     Merrill Lynch, Pierce, Fenner & Smith Incorporated has been appointed as
Agent for the Sponsors by the other Sponsors.
 
                                       24
<PAGE>
     The Trustee may resign upon notice to the Sponsors; it may be removed by
direction of Holders of 51% of the Units at any time or by the Sponsors without
consent of Holders if it becomes incapable of acting or bankrupt, its affairs
are taken over by public authorities, or if for any reason the Sponsors
determine in good faith that its replacement is in the best interest of the
Holders. The Evaluator may resign or be removed by the Sponsors and the Trustee
without consent of Holders. The resignation or removal of either becomes
effective upon acceptance of appointment by a successor; in this case, the
Sponsors (and the Trustee in the case of a successor Evaluator) will use their
best efforts to appoint a successor promptly; however, if upon resignation no
successor has accepted appointment within 30 days after notification, the
resigning Trustee or Evaluator may apply to a court of competent jurisdiction to
appoint a successor.
 
     Any Sponsor may resign if one remaining Sponsor maintains a net worth of
$2,000,000 and is agreeable to the resignation. A new Sponsor may be appointed
by the remaining Sponsors and the Trustee to assume the duties of the resigning
Sponsor. If there is only one Sponsor and it fails to perform its duties or
becomes incapable of acting or bankrupt or its affairs are taken over by public
authorities, the Trustee may (a) appoint a successor Sponsor at rates of
compensation deemed by the Trustee to be reasonable and not exceeding amounts
prescribed by the SEC, or (b) terminate the Indenture and liquidate the Fund or
(c) continue to act as Trustee without terminating the Indenture.
 
     The Sponsors, the Trustee and the Evaluator are not liable to any other
party (including Holders) for any act or omission in the conduct of their
responsibilities absent bad faith, willful misfeasance, negligence (gross
negligence in the case of a Sponsor) or reckless disregard of duty. The Trustee
will not be personally liable for taxes or other governmental charges with
respect to the Securities or interest thereon. The Indenture contains other
customary provisions limiting liability of the Trustee.
 
MISCELLANEOUS
 
TRUSTEE
 
     The Trustee and its address are named on the back cover of the Prospectus.
It is subject to supervision by the FDIC, the Board of Governors of the Federal
Reserve System and either the Comptroller of the Currency or state banking
authorities.
 
LEGAL OPINION
 
     The legality of the Units has been passed upon by Davis Polk & Wardwell,
450 Lexington Avenue, New York, New York 10017, as special counsel for the
Sponsors.
 
AUDITORS
 
     The Statement of Condition in Part A was audited by Deloitte & Touche LLP,
independent accountants, as stated in their opinion. It is included in reliance
upon that opinion given on the authority of that firm as experts in accounting
and auditing.
 
SPONSORS
 
     Each Sponsor is a Delaware corporation and is engaged in the underwriting,
securities and commodities brokerage business and is a member of the New York
Stock Exchange, Inc., other major securities exchanges and commodity exchanges,
and the National Association of Securities Dealers, Inc. Merrill Lynch, Pierce,
Fenner & Smith Incorporated, a subsidiary of Merrill Lynch & Co., Inc., is
engaged in the investment advisory business. Smith Barney Inc., an investment
banking and securities broker-dealer firm, is an indirect wholly-owned
subsidiary of The Travelers Inc. Prudential Securities Incorporated, a
wholly-owned subsidiary of Prudential Securities Group Inc. and an indirectly
wholly-owned subsidiary of the Prudential Insurance Company of America, is
engaged in the investment advisory business. Dean Witter Reynolds Inc., a
principal operating subsidiary of Dean Witter, Discover & Co., is engaged in the
investment advisory business. PaineWebber Incorporated is engaged in the
investment advisory business and is a wholly-owned subsidiary of PaineWebber
Group Inc. Each Sponsor, or one of its predecessor corporations, has acted as
Sponsor of a number of series of unit investment trusts. Each Sponsor has acted
as principal underwriter and managing underwriter of other investment companies.
The Sponsors, in addition to participating as members of various selling groups
or as agents of other investment companies, execute orders on behalf of
investment companies for the purchase and sale of securities of these companies
and sell securities to these companies in their capacities as brokers or dealers
in securities.
 
                                       25
<PAGE>
PUBLIC DISTRIBUTION
 
     On the Initial Date of Deposit, the Sponsors, acting as managers for the
underwriters ('Underwriters') named under Underwriting Account, deposited the
Debt Obligations listed under Portfolio (or purchase contracts for these
Securities together with a letter of credit to complete the purchase), in
exchange for Units representing the entire ownership of the Fund.
 
     During the initial offering period Units will be distributed to the public
at the Public Offering Price through the Underwriting Account and dealers. The
initial offering period is 30 days or less if all Units are sold. If some Units
initially offered have not been sold, the Sponsors may extend the initial
offering period for up to four additional successive 30-day periods. Upon the
completion of the initial offering, Units which remain unsold or were
repurchased may be offered by this Prospectus at the secondary market Public
Offering Price.
 
     The Sponsors intend to qualify Units for sale in all states in which
qualification is deemed necessary through the Underwriting Account and by
dealers who are members of the National Association of Securities Dealers, Inc.;
however, Units of a State Trust will be offered for sale only in the State for
which the Trust is named, except that Units of a New Jersey Trust will also be
offered in Connecticut, and Units of a New York Trust will also be offered in
Connecticut, Florida and Puerto Rico. The Sponsors do not intend to qualify
Units for sale in any foreign countries and this Prospectus does not constitute
an offer to sell Units in any country where Units cannot lawfully be sold. Sales
to dealers and to introducing dealers, if any, will initially be made at prices
which represent a concession of the applicable rate specified in Appendix B, but
the Agent for the Sponsors reserves the right to change the rate of the
concession to dealers and the concession to introducing dealers from time to
time. Any dealer or introducing dealer may reallow a concession up to the
concession to dealers.
 
UNDERWRITERS' AND SPONSORS' PROFITS
 
     Upon sale of the Units, the Underwriters will receive sales charges at the
rates listed in Appendix B. The Sponsors also realized the profit or loss on
deposit of the Securities stated in Investment Summary. This is the difference
between the cost of the Securities to the Fund (based on the offer side
evaluation of the Securities on the Initial Date of Deposit) and the Sponsors'
cost of the Securities. The amount of any additional fees received in connection
with the direct placement of certain Debt Obligations deposited in the Portfolio
is also stated in Investment Summary. In addition, a Sponsor or Underwriter may
realize profits or sustain losses on Debt Obligations it deposits in the Fund
which were acquired from underwriting syndicates of which it was a member.
During the initial offering period the Underwriting Account also may realize
profits or sustain losses as a result of fluctuations after the Initial Date of
Deposit in the Public Offering Price of the Units (see Investment Summary). In
maintaining a secondary market for Units (see Market for Units), the Sponsors
will also realize profits or sustain losses in the amount of any difference
between the prices at which they buy Units and the prices at which they resell
these Units (which include the sales charge) or the prices at which they redeem
the Units. Cash, if any, made available by buyers of Units to the Sponsors prior
to a settlement date for the purchase of Units may be used in the Sponsors'
businesses to the extent permitted by Rule 15c3-3 under the Securities Exchange
Act of 1934 and may be of benefit to the Sponsors.
 
DEFINED ASSET FUNDS
 
     Each Sponsor (or a predecessor) has acted as Sponsor of various series of
Defined Asset Funds. A subsidiary of Merrill Lynch, Pierce, Fenner & Smith
Incorporated succeeded in 1970 to the business of Goodbody & Co., which had been
a co-Sponsor of Defined Asset Funds since 1964. That subsidiary resigned as
Sponsor of each of the Goodbody series in 1971. Merrill Lynch, Pierce, Fenner &
Smith Incorporated has been co-Sponsor and the Agent for the Sponsors of each
series of Defined Asset Funds created since 1971. Shearson Lehman Brothers Inc.
('Shearson') and certain of its predecessors were underwriters beginning in 1962
and co-Sponsors from 1965 to 1967 and from 1980 to 1993 of various Defined Asset
Funds. As a result of the acquisition of certain of Shearson's assets by Smith
Barney, Harris Upham & Co. Incorporated and The Travelers Inc. (formerly
Primerica Corporation), Smith Barney Inc. now serves as co-Sponsor of various
Defined Asset Funds. Prudential Securities Incorporated and its predecessors
have been underwriters of Defined Asset Funds since 1961 and co-Sponsors since
1964, in which year its predecessor became successor co-Sponsor to the original
Sponsor. Dean Witter Reynolds Inc. and its predecessors have been underwriters
of various Defined Asset Funds since 1964 and co-Sponsors since 1974.
PaineWebber Incorporated and its predecessor have co-Sponsored certain Defined
Asset Funds since 1983.
 
     The Sponsors have maintained secondary markets in Defined Asset Funds for
over 20 years. For decades informed investors have purchased unit investment
trusts for dependability and professional selection of investments. Defined
Asset Funds offers an array of simple and convenient investment choices, suited
to fit a
 
                                       26
<PAGE>
wide variety of personal financial goals--a buy and hold strategy for capital
accumulation, such as for children's education or a nest egg for retirement, or
attractive, regular current income consistent with relative protection of
capital. There are Defined Funds to meet the needs of just about any investor.
Unit investment trusts are particularly suited for the many investors who prefer
to seek long-term profits by purchasing sound investments and holding them,
rather than through active trading. Few individuals have the knowledge,
resources or capital to buy and hold a diversified portfolio on their own; it
would generally take a considerable sum of money to obtain the breadth and
diversity offered by Defined Funds. Sometimes it takes a combination of Defined
Funds to plan for your objectives.
 
     Sales material for the Fund may show the average annual compounded rate of
return of selected asset classes over the most recent 10-year and 20-year
periods for which information is available and may compare such returns to the
rate of inflation over the same periods.
 
     One of the most important investment decisions an investor faces may be how
to allocate his investments among asset classes. Diversification among different
kinds of investments can balance the risks and rewards of each one. Most
investment experts recommend stocks for long-term capital growth. Long-term
corporate bonds offer relatively high rates of interest income. By purchasing
both defined equity and defined bond funds, investors can receive attractive
current income, as well as growth potential, offering some protection against
inflation.
 
     Instead of having to select individual securities on their own, purchasers
of Defined Funds benefit from the expertise of Defined Asset Funds' experienced
buyers and research analysts. In addition, they gain the advantage of
diversification by investing in units of a Defined Fund holding securities of
several different issuers. Such diversification reduces risk, but does not
eliminate it. While the portfolio of managed funds, such as mutual funds,
continually changes, defined bond funds offer a defined portfolio and a schedule
of income distributions defined in the prospectus. Investors know, generally,
when they buy, the issuers, maturities, call dates and ratings of the securities
in the portfolio. Of course, the portfolio may change somewhat over time as
additional securities are deposited, as securities mature or are called or
redeemed or as they are sold to meet redemptions and in the limited other
circumstances. Investors buy bonds for dependability--they know what they can
expect to earn and that principal is distributed as the bonds mature. Investors
also know at the time of purchase their estimated income and current and
long-term returns, subject to credit and market risks and to changes in the
portfolio or the fund's expenses.
 
     Defined Asset Funds offers a variety of fund types. The tax exemption for
municipal bonds, which makes them attractive to high-bracket taxpayers, is
offered by Defined Municipal Investment Trust Funds. Defined Municipal
Investment Trust Funds have provided investors with tax-free income for more
than 30 years. Municipal Defined Funds offer a simple and convenient way for
investors to earn monthly income free from regular Federal income tax. Defined
Corporate Income Funds, with higher current returns than municipal or government
funds, are suitable for Individual Retirement Accounts and other tax-advantaged
accounts and provide investors a simple and convenient way to earn monthly
income. Defined Government Securities Income Funds provide a way to participate
in markets for U.S. government securities while earning an attractive current
return. Defined International Bond Funds, invested in bonds payable in foreign
currencies, offer a potential to profit from changes in currency values and
possibly from interest rates higher than paid on comparable U.S. bonds, but
investors incur a higher risk for these potentially greater returns.
Historically, stocks have offered growth of capital, and thus some protection
against inflation, over the long term. Defined Equity Income Funds offer
participation in the stock market, providing current income as well as the
possibility of capital appreciation. The S&P Index Trusts offer a convenient and
inexpensive way to participate in broad market movements. Concept Series seek to
capitalize on selected anticipated economic, political or business trends.
Utility Stock Series, consisting of stocks of issuers with established
reputations for regular cash dividends, seek to benefit from dividend increases.
Select Ten Portfolios seek total return by investing for one year in the ten
highest yielding stocks on a designated stock index.
 
                                       27
<PAGE>
                                   APPENDIX A
 
DESCRIPTION OF RATINGS (AS DESCRIBED BY THE RATING COMPANIES THEMSELVES)
 
STANDARD & POOR'S RATINGS GROUP, A DIVISION OF MCGRAW-HILL, INC.
 
     AAA--Debt rated AAA has the highest rating assigned by Standard & Poor's.
Capacity to pay interest and repay principal is extremely strong.
 
     AA--Debt rated AA has a very strong capacity to pay interest and repay
principal and differs from the highest rated issues only in small degree.
 
     A--Debt rated A has a strong capacity to pay interest and repay principal
although it is somewhat more susceptible to the adverse effects of changes in
circumstances and economic conditions than debt in higher rated categories.
 
     BBB--Debt rated BBB is regarded as having an adequate capacity to pay
interest and repay principal. Whereas it normally exhibits adequate protection
parameters, adverse economic conditions or changing circumstances are more
likely to lead to a weakened capacity to pay interest and repay principal for
debt in this category than in higher rated categories.
 
     BB, B, CCC, CC--Debt rated BB, B, CCC and CC is regarded, on balance, as
predominately speculative with respect to capacity to pay interest and repay
principal in accordance with the terms of the obligation. BB indicates the
lowest degree of speculation and CC the highest degree of speculation. While
such debt will likely have some quality and protective characteristics, these
are outweighed by large uncertainties or major risk exposures to adverse
conditions.
 
     The ratings may be modified by the addition of a plus or minus sign to show
relative standing within the major rating categories.
 
     A provisional rating, indicated by 'p' following a rating, assumes the
successful completion of the project being financed by the issuance of the debt
being rated and indicates that payment of debt service requirements is largely
or entirely dependent upon the successful and timely completion of the project.
This rating, however, while addressing credit quality subsequent to completion
of the project, makes no comment on the likelihood of, or the risk of default
upon failure of, such completion.
 
     NR--Indicates that no rating has been requested, that there is insufficient
information on which to base a rating or that Standard & Poor's does not rate a
particular type of obligation as a matter of policy.
 
MOODY'S INVESTORS SERVICE, INC.
 
     Aaa--Bonds which are rated Aaa are judged to be the best quality. They
carry the smallest degree of investment risk and are generally referred to as
'gilt edge'. Interest payments are protected by a large or by an exceptionally
stable margin and principal is secure. While the various protective elements are
likely to change, such changes as can be visualized are most unlikely to impair
the fundamentally strong position of such issues.
 
     Aa--Bonds which are rated Aa are judged to be of high quality by all
standards. Together with the Aaa group they comprise what are generally known as
high grade bonds. They are rated lower than the best bonds because margins of
protection may not be as large as in Aaa securities or fluctuation of protective
elements may be of greater amplitude or there may be other elements present
which make the long-term risks appear somewhat larger than in Aaa securities.
 
     A--Bonds which are rated A possess many favorable investment attributes and
are to be considered as upper medium grade obligations. Factors giving security
to principal and interest are considered adequate, but elements may be present
which suggest a susceptibility to impairment sometime in the future.
 
     Baa--Bonds which are rated Baa are considered as medium grade obligations,
i.e., they are neither highly protected nor poorly secured. Interest payments
and principal security appear adequate for the present but certain protective
elements may be lacking or may be characteristically unreliable over any great
length of time. Such bonds lack outstanding investment characteristics and in
fact have speculative characteristics as well.
 
     Ba--Bonds which are rated Ba are judged to have speculative elements; their
future cannot be considered as well assured. Often the protection of interest
and principal payments may be very moderate, and thereby not well
 
                                      a-1
<PAGE>
safeguarded during both good and bad times over the future. Uncertainty of
position characterizes bonds in this class.
 
     B--Bonds which are rated B generally lack characteristics of the desirable
investment. Assurance of interest and principal payments or of maintenance of
other terms of the contract over any long period of time may be small.
 
     Rating symbols may include numerical modifiers 1, 2 or 3. The numerical
modifier 1 indicates that the security ranks at the high end, 2 in the
mid-range, and 3 nearer the low end, of the generic category. These modifiers of
rating symbols give investors a more precise indication of relative debt quality
in each of the historically defined categories.
 
     Conditional ratings, indicated by 'Con.', are sometimes given when the
security for the bond depends upon the completion of some act or the fulfillment
of some condition. Such bonds are given a conditional rating that denotes their
probable credit stature upon completion of that act or fulfillment of that
condition.
 
     NR--Should no rating be assigned, the reason may be one of the following:
(a) an application for rating was not received or accepted; (b) the issue or
issuer belongs to a group of securities that are not rated as a matter of
policy; (c) there is a lack of essential data pertaining to the issue or issuer
or (d) the issue was privately placed, in which case the rating is not published
in Moody's publications.
 
FITCH INVESTORS SERVICE, INC.
 
     AAA--These bonds are considered to be investment grade and of the highest
quality. The obligor has an extraordinary ability to pay interest and repay
principal, which is unlikely to be affected by reasonably foreseeable events.
 
     AA--These bonds are considered to be investment grade and of high quality.
The obligor's ability to pay interest and repay principal, while very strong, is
somewhat less than for AAA rated securities or more subject to possible change
over the term of the issue.
 
     A--These bonds are considered to be investment grade and of good quality.
The obligor's ability to pay interest and repay principal is considered to be
strong, but may be more vulnerable to adverse changes in economic conditions and
circumstances than bonds with higher ratings.
 
     BBB--These bonds are considered to be investment grade and of satisfactory
quality. The obligor's ability to pay interest and repay principal is considered
to be adequate. Adverse changes in economic conditions and circumstances,
however are more likely to weaken this ability than bonds with higher ratings.
 
     A '+' or a '-' sign after a rating symbol indicates relative standing in
its rating.
 
DUFF & PHELPS CREDIT RATING CO.
 
     AAA--Highest credit quality. The risk factors are negligible, being only
slightly more than for risk-free U.S. Treasury debt.
 
     AA--High credit quality. Protection factors are strong. Risk is modest but
may vary slightly from time to time because of economic condtions.
 
     A--Protection factors are average but adequate. However, risk factors are
more variable and greater in periods of economic stress.
 
     A '+' or a '-' sign after a rating symbol indicates relative standing in
its rating.
 
                                      a-2
<PAGE>
                                   APPENDIX B
                     INITIAL OFFERING SALES CHARGE SCHEDULE
 
<TABLE><CAPTION>

                                                SALES CHARGE
                                        (GROSS UNDERWRITING PROFIT)
                                     ----------------------------------
                                      AS PERCENT OF       AS PERCENT OF  DEALER CONCESSION AS   PRIMARY MARKET
                                     OFFER SIDE PUBLIC     NET AMOUNT    PERCENT OF PUBLIC       CONCESSION TO
NUMBER OF UNITS                      OFFERING PRICE          INVESTED     OFFERING PRICE        INTRODUCING DEALERS
- -----------------------------------  -------------------  -------------  ---------------------  -------------------

           MONTHLY PAYMENT SERIES, MULTISTATE SERIES, INSURED SERIES
<S>                                            <C>              <C>                <C>               <C>     
Less than 250......................            4.50%            4.712%             2.925%            $   32.40
250 - 499..........................            3.50             3.627              2.275                 25.20
500 - 749..........................            3.00             3.093              1.950                 21.60
750 - 999..........................            2.50             2.564              1.625                 18.00
1,000 or more......................            2.00             2.041              1.300                 14.40

                   INTERMEDIATE SERIES (TEN YEAR MATURITIES)

Less than 250......................            4.00%            4.167%             2.600%            $   28.80
250 - 499..........................            3.00             3.093              1.950                 21.60
500 - 749..........................            2.50             2.564              1.625                 18.00
750 - 999..........................            2.00             2.040              1.300                 14.40
1,000 or more......................            1.50             1.523              0.975                 10.00

              INTERMEDIATE SERIES (SHORT INTERMEDIATE MATURITIES)

Less than 250......................            2.75%            2.828%             1.788%            $   19.80
250 - 499..........................            2.25             2.302              1.463                 16.20
500 - 749..........................            1.75             1.781              1.138                 12.60
750 - 999..........................            1.25             1.266              0.813                  9.00
1,000 or more......................            1.00             1.010              0.650                  7.20
</TABLE>

                     SECONDARY MARKET SALES CHARGE SCHEDULE

                   ACTUAL SALES CHARGE AS %   DEALER CONCESSION AS % OF
 NUMBER OF UNITS   OF EFFECTIVE SALES CHARGE  EFFECTIVE SALES CHARGE
- -----------------  -------------------------  -------------------------
1-249                            100%                        65%
250-499                           80%                        52%
500-749                           60%                        39%
750-999                           45%                     29.25%
1,000 or more                     35%                     22.75%

 
                             EFFECTIVE SALES CHARGE
 

                              (AS PERCENT    (AS PERCENT
          TIME TO             OF BID SIDE      OF PUBLIC
          MATURITY            EVALUATION)  OFFERING PRICE
- ----------------------------  -----------  -----------------
Less than six months                   0%              0%
Six months to 1 year               0.756%           0.75%
Over 1 year to 2 years             1.523%           1.50%
Over 2 years to 4 years            2.564%           2.50%
Over 4 years to 8 years            3.627%           3.50%
Over 8 years to 15 years           4.712%           4.50%
Over 15 years                      5.820%           5.50%

 
     For this purpose, a Security will be considered to mature on its stated
maturity date unless it has been called for redemption or funds or securities
have been placed in escrow to redeem it on an earlier date, or is subject to a
mandatory tender, in which case the earlier date will be considered the maturity
date.
 
                                      b-1
<PAGE>
                                   APPENDIX C
                                 EXCHANGE FUNDS
 
<TABLE><CAPTION>

                                                                 REDUCED
                                              MAXIMUM          SALES CHARGE
                NAME OF                    APPLICABLE         FOR SECONDARY                           INVESTMENT
             EXCHANGE FUND               SALES CHARGE(A)        MARKET(B)                          CHARACTERISTICS
- ---------------------------------------  ---------------  ----------------------  --------------------------------------------------
<S>                                      <C>              <C>                     <C> 
DEFINED ASSET FUNDS-- MUNICIPAL
 INVESTMENT TRUST FUND
    Monthly Payment, State and                   5.50%(c) $15 per unit            long-term, fixed rate, tax-exempt income
      Multistate Series
    Intermediate Term Series                     4.50%(c) $15 per unit            intermediate-term, fixed rate, tax-exempt income
    Insured Series                               5.50%(c) $15 per unit            long-term, fixed rate, tax-exempt income,
                                                                                  underlying securities insured by insurance
                                                                                  companies
    AMT Monthly Payment Series                   5.50%(c) $15 per unit            long-term, fixed rate, income exempt from regular
                                                                                  federal income tax but partially subject to AMT
DEFINED ASSET FUNDS-- MUNICIPAL INCOME
  FUND
    Insured Discount Series                      5.50%(c) $15 per unit            long-term, fixed rate, insured, tax-exempt current
                                                                                  income, taxable capital gains
DEFINED ASSET FUNDS-- INTERNATIONAL
  BOND FUND
    Multi-Currency Series                        3.75%    $15 per unit            intermediate-term, fixed rate, payable in foreign
                                                                                  currencies, taxable income
    Australian and New Zealand Dollar            3.75%    $15 per unit            intermediate-term, fixed rate, payable in
      Bond Series                                                                 Australian and New Zealand dollars, taxable income
    Australian Dollar Bonds Series               3.75%    $15 per unit            intermediate-term, fixed rate, payable in
                                                                                  Australian dollars, taxable income
    Canadian Dollar Bonds Series                 3.75%    $15 per unit            short intermediate-term, fixed rate, payable in
                                                                                  Canadian dollars, taxable income
 
DEFINED ASSET FUNDS-- CORPORATE INCOME
  FUND
    Monthly Payment Series                       5.50%    $15 per unit            long-term, fixed rate, taxable income
    Intermediate Term Series                     4.75%    $15 per unit            intermediate-term, fixed rate, taxable income
    Cash or Accretion Bond Series and            3.50%    $15 per 1,000 units     intermediate-term, fixed rate, underlying
      SELECT Series                                                               securities are collateralized compound interest
                                                                                  obligations, taxable income, appropriate for IRA's
                                                                                  or tax-deferred retirement plans
    Insured Series                               5.50%    $15 per unit            long-term, fixed rate, taxable income, underlying
                                                                                  securities are insured
DEFINED ASSET FUNDS-- GOVERNMENT
  SECURITIES INCOME FUND
    GNMA Series (other than those                4.25%    $15 per unit            long-term, fixed rate, taxable income, underlying
      below)                                                                      securities backed by the full faith and credit of
                                                                                  the United States
    GNMA Series E or other GNMA Series           4.25%    $15 per 1,000 units     long-term, fixed rate, taxable income, underlying
      having units with an initial face                                           securities backed by the full faith and credit of
      value of $1.00                                                              the United States, appropriate for IRA's or
                                                                                  tax-deferred retirement plans
    Freddie Mac Series                           3.75%    $15 per 1,000 units     intermediate term, fixed rate, taxable income,
                                                                                  underlying securities are backed by Federal Home
                                                                                  Loan Mortgage Corporation but not by U.S.
                                                                                  Government.

</TABLE>
- ---------------
(a) As described in the prospectuses relating to certain Exchange Funds, this
    sales charge for secondary market sales may be reduced on a graduated scale
    in the case of quantity purchases.
 
(b) The reduced sales charge for Units acquired during their initial offering
    period is: $20 per unit for Series for which the Reduced Sales Charge for
    Secondary Market (above) is $15 per unit; $20 per 100 units for Series for
    which the Reduced Sales Charge for Secondary Market (above) is $15 per 100
    units and $20 per 1,000 units for Series for which the Reduced Sales Charge
    for Secondary Market is $15 per 1,000 unit.
 
(c) Subject to reduction depending on the maturities of the underlying
    Securities.
 
(d) The reduced sales charge for the Sixth Utility Common Stock Series of Equity
    Income Fund is $15 per 2,000 units and for prior Utility Common Stock Series
    is $7.50 per unit.
 
                                      c-1
<PAGE>
 
<TABLE><CAPTION>

                                                                 REDUCED
                                              MAXIMUM          SALES CHARGE
                NAME OF                    APPLICABLE         FOR SECONDARY                           INVESTMENT
             EXCHANGE FUND               SALES CHARGE(A)        MARKET(B)                          CHARACTERISTICS
- ---------------------------------------  ---------------  ----------------------  --------------------------------------------------
<S>                                      <C>              <C>                     <C> 
DEFINED ASSET FUNDS--EQUITY INCOME FUND
    Utility Common Stock Series                  4.50%    $15 per 1,000 units(d)  dividends, taxable income, underlying securities
                                                                                  are common stocks of public utilities
    Concept Series                               4.00%    $15 per 100 units       underlying securities constitute a professionally
                                                                                  selected portfolio of common stocks consistent
                                                                                  with an investment idea or concept
    Select Ten Portfolios (domestic and          2.75%    $17.50 per 1,000 units  10 highest dividend yielding stocks in a
      international)                                                              designated stock index; seeks higher total return
                                                                                  than that stock index; terminates after one year

 
</TABLE>
                                      c-2
<PAGE>
                             Defined
                             Asset FundsSM
   
SPONSORS:                                MUNICIPAL INVESTMENT
Merrill Lynch,                           TRUST FUND
Pierce, Fenner & Smith Incorporated      Monthly Payment Series--555
Defined Asset Funds                      A Unit Investment Trust
P.O. Box 9051                            PROSPECTUS
Princeton, N.J. 08543-9051               This Prospectus does not contain all of
(609) 282-8500                           the information with respect to the
Smith Barney Inc.                        investment company set forth in its
Unit Trust Department                    registration statement and exhibits
388 Greenwich Street--23rd Floor         relating thereto which have been filed
New York, N.Y. 10013                     with the Securities and Exchange
1-800-223-2532                           Commission, Washington, D.C. under the
PaineWebber Incorporated                 Securities Act of 1933 and the
1200 Harbor Blvd.                        Investment Company Act of 1940, and to
Weehawken, N.J. 07087                    which reference is hereby made.
(201) 902-3000                           No person is authorized to give any
Prudential Securities Incorporated       information or to make any
One Seaport Plaza                        representations with respect to this
199 Water Street                         investment company not contained in
New York, N.Y. 10292                     this Prospectus; and any information or
(212) 776-1000                           representation not contained herein
Dean Witter Reynolds Inc.                must not be relied upon as having been
Two World Trade Center--59th Floor       authorized. This Prospectus does not
New York, N.Y. 10048                     constitute an offer to sell, or a
(212) 392-2222                           solicitation of an offer to buy,
EVALUATOR:                               securities in any state to any person
Kenny S&P Evaluation Services            to whom it is not lawful to make such
65 Broadway                              offer in such state.
New York, N.Y. 10006
INDEPENDENT ACCOUNTANTS:
Deloitte & Touche LLP
2 World Financial Center
9th Floor
New York, N.Y. 10281-1414
TRUSTEE:
The Chase Manhattan Bank, N.A.
Unit Trust Department
Box 2051
New York, New York 10081
1-800-323-1508
                                                      15056--2/95
    
 
<PAGE>
                                    PART II
             ADDITIONAL INFORMATION NOT INCLUDED IN THE PROSPECTUS
<TABLE><CAPTION> 

A. The following information relating to the Depositors is incorporated by reference to the SEC
filings
indicated and made a part of this Registration Statement.
 
                                                                SEC FILE OR
                                                               IDENTIFICATION           DATE
                                                                   NUMBER              FILED
                                                            ----------------------------------------
<S>                                                         <C>                        <C>
   I.  Bonding Arrangements and Date of Organization of the
            Depositors filed pursuant to Items A and B of
            Part II of the Registration Statement on Form
            S-6 under the Securities Act of 1933:
 
            Merrill Lynch, Pierce, Fenner & Smith
            Incorporated....................................      2-52691             1/17/95
            Smith Barney Inc. ..............................      33-29106            6/29/89
            PaineWebber Incorporated........................      2-87965             11/18/83
            Prudential Securities Incorporated..............      2-61418             4/26/78
            Dean Witter Reynolds Inc. ......................      2-60599              1/4/78
 
   II.  Information as to Officers and Directors of the
            Depositors filed pursuant to Schedules A and D
            of Form BD under Rules 15b1-1 and 15b3-1 of the
            Securities Exchange Act of 1934:
 
            Merrill Lynch, Pierce, Fenner & Smith
            Incorporated....................................       8-7221         5/26/94, 6/29/92
            Smith Barney Inc. ..............................       8-8177         8/29/94, 8/2/93
            PaineWebber Incorporated........................      8-16267         4/20/94, 7/31/86
            Prudential Securities Incorporated..............      8-27154         6/30/94, 6/20/88
            Dean Witter Reynolds Inc. ......................      8-14172         2/23/94, 4/9/91
 
   III.  Charter documents of the Depositors filed as
            Exhibits to the Registration Statement on Form
            S-6 under the Securities Act of 1933 (Charter,
            By-Laws):
 
            Merrill Lynch, Pierce, Fenner & Smith
            Incorporated....................................  2-73866, 2-77549    9/22/81, 6/15/82
            Smith Barney Inc. ..............................      33-20499            3/30/88
            PaineWebber Incorporated........................  2-87965, 2-87965        11/18/83
            Prudential Securities Incorporated..............      2-52947              3/4/75
            Dean Witter Reynolds Inc. ......................      2-60599              1/4/78
 
</TABLE>
B.  The Internal Revenue Service Employer Identification
            Numbers of the Sponsors and Trustee are as
follows:
 
            Merrill Lynch, Pierce, Fenner & Smith
            Incorporated....................................     13-5674085
            Smith Barney Inc. ..............................     13-1912900
            PaineWebber Incorporated........................     13-2638166
            Prudential Securities Incorporated..............     22-2347336
            Dean Witter Reynolds Inc. ......................     94-0899825
   
            The Chase Manhattan Bank, N.A., Trustee.........     13-2633612
    

 
                                      II-1
<PAGE>
                       CONTENTS OF REGISTRATION STATEMENT
The Registration Statement on Form S-6 comprises the following papers and
documents:
 
     The facing sheet of Form S-6.
 
     The Cross-Reference Sheet (incorporated by reference to the Cross-Reference
Sheet to the Registration Statement of Municipal Investment Trust Fund, Three
Hundred Tenth Monthly Payment Series, 1933 Act File No. 2-88372).
 
     The Prospectus.
 
     Additional Information not included in the Prospectus (Part II).
 
     Consent of independent accountants.
 
The following exhibits:
 

 1.1    --Form of Trust Indenture (incorporated by reference to Exhibit 1.1 to
          the Registration Statement of Municipal Investment Trust Fund, Monthly
          Payment Series-533, 1933 Act File No. 33-50121).
 1.1.1  --Form of Standard Terms and Conditions of Trust Effective October 21,
          1993 (incorporated by reference to Exhibit 1.1.1 to the Registration
          Statement of Municipal Investment Trust Fund, Multistate Series-48,
          1933 Act File No. 33-50247).
 1.2    --Form of Master Agreement Among Underwriters (incorporated by reference
          to Exhibit 1.2 to the Registration Statement of The Corporate Income
          Fund, One Hundred Ninety-Fourth Monthly Payment Series, 1933 Act File
          No. 2-90925).
 2.1    --Form of Certificate of Beneficial Interest (included in Exhibit
        1.1.1).
 3.1    --Opinion of counsel as to the legality of the securities being issued
          including their consent to the use of their names under the headings
          'Taxes' and 'Miscellaneous--Legal Opinion' in the Prospectus.
 4.1    --Consent of the Evaluator.

 
                                      R-1
<PAGE>
                                   SIGNATURES
   
PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT HAS
DULY CAUSED THIS REGISTRATION STATEMENT OR AMENDMENT TO THE REGISTRATION
STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED THEREUNTO DULY
AUTHORIZED IN THE CITY OF NEW YORK AND STATE OF NEW YORK ON THE 23RD DAY OF
FEBRUARY, 1995.
    
 
             SIGNATURES APPEAR ON PAGES R-3, R-4, R-5, R-6 AND R-7.
 
     A majority of the members of the Board of Directors of Merrill Lynch,
Pierce, Fenner & Smith Inc. has signed this Registration Statement or Amendment
to the Registration Statement pursuant to Powers of Attorney authorizing the
person signing this Registration Statement or Amendment to the Registration
Statement to do so on behalf of such members.
 
     A majority of the members of the Directors of Smith Barney Inc. has signed
this Registration Statement or Amendment to the Registration Statement pursuant
to Powers of Attorney authorizing the person signing this Registration Statement
or Amendment to the Registration Statement to do so on behalf of such members.
 
     A majority of the members of the Executive Committee of the Board of
Directors of PaineWebber Incorporated has signed this Registration Statement or
Amendment to the Registration Statement pursuant to Powers of Attorney
authorizing the person signing this Registration Statement or Amendment to the
Registration Statement to do so on behalf of such members.
 
     A majority of the members of the Board of Directors of Prudential
Securities Incorporated has signed this Registration Statement or Amendment to
the Registration Statement pursuant to Powers of Attorney authorizing the person
signing this Registration Statement or Amendment to the Registration Statement
to do so on behalf of such members.
 
     A majority of the members of the Board of Directors of Dean Witter Reynolds
Inc. has signed this Registration Statement or Amendment to the Registration
Statement pursuant to Powers of Attorney authorizing the person signing this
Registration Statement or Amendment to the Registration Statement to do so on
behalf of such members.
 
                                      R-2
<PAGE>
               MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
                                   DEPOSITOR
 

By the following persons, who constitute  Powers of Attorney have been filed
  a majority of                             under
  the Board of Directors of Merrill         Form SE and the following 1933 Act
  Lynch, Pierce,                            File
  Fenner & Smith Incorporated:              Number: 33-43466

 
      HERBERT M. ALLISON, JR.
      BARRY S. FREIDBERG
      EDWARD L. GOLDBERG
      STEPHEN L. HAMMERMAN
      JEROME P. KENNEY
      DAVID H. KOMANSKY
      DANIEL T. NAPOLI
      THOMAS H. PATRICK
      JOHN L. STEFFENS
      DANIEL P. TULLY
      ROGER M. VASEY
      ARTHUR H. ZEIKEL
      By
       ERNEST V. FABIO
       (As authorized signatory for Merrill Lynch, Pierce,
       Fenner & Smith Incorporated and
       Attorney-in-fact for the persons listed above)
 
                                      R-3
<PAGE>
                               SMITH BARNEY INC.
                                   DEPOSITOR
 

By the following persons, who constitute a majority of      Powers of Attorney
  the Board of Directors of Smith Barney Inc.:                have been filed
                                                              under the 1933 Act
                                                              File Number:
                                                              33-49753 and
                                                              33-51607

 
      STEVEN D. BLACK
      JAMES BOSHART III
      ROBERT A. CASE
      JAMES DIMON
      ROBERT DRUSKIN
      ROBERT F. GREENHILL
      JEFFREY LANE
      JACK L. RIVKIN
 
      By KEVIN E. KOPCZYNSKI
       (As authorized signatory for
       Smith Barney Inc. and
       Attorney-in-fact for the persons listed above)
 
                                      R-4
<PAGE>
                            PAINEWEBBER INCORPORATED
                                   DEPOSITOR
 

By the following persons, who constitute  Powers of Attorney have been filed
  a majority of                             under
  the Executive Committee of the Board      the following 1933 Act File
  of Directors                              Number: 33-55073
  of PaineWebber Incorporated:

 
      PAUL B. GUENTHER
      DONALD B. MARRON
      JOSEPH J. GRANO, JR.
      LEE FENSTERSTOCK
      By
       ROBERT E. HOLLEY
       (As authorized signatory for PaineWebber Incorporated
       and Attorney-in-fact for the persons listed above)
 
                                      R-5
<PAGE>
                       PRUDENTIAL SECURITIES INCORPORATED
                                   DEPOSITOR
 

By the following persons, who constitute  Powers of Attorney have been filed
  a majority of                             under Form SE and the following 1933
  the Executive Committee of the Board      Act File Number: 33-41631
  of Directors of
  Prudential Securities Incorporated:

 
      ALAN D. HOGAN
      HOWARD A. KNIGHT
      GEORGE A. MURRAY
      LELAND B. PATON
      HARDWICK SIMMONS
      By
       RICHARD R. HOFFMANN
       (As authorized signatory for Prudential Securities
       Incorporated and Attorney-in-fact for the persons listed above)
 
                                      R-6
<PAGE>
                           DEAN WITTER REYNOLDS INC.
                                   DEPOSITOR
 

By the following persons, who constitute  Powers of Attorney have been filed
  a majority of                             under Form SE and the following
  the Board of Directors of Dean Witter     1933 Act File Number: 33-17085
  Reynolds Inc.:

 
      NANCY DONOVAN
      CHARLES A. FIUMEFREDDO
      JAMES F. HIGGINS
      STEPHEN R. MILLER
      PHILIP J. PURCELL
      THOMAS C. SCHNEIDER
      WILLIAM B. SMITH
      By
       MICHAEL D. BROWNE
       (As authorized signatory for Dean Witter Reynolds Inc.
       and Attorney-in-fact for the persons listed above)
 
                                      R-7
<PAGE>
                       CONSENT OF INDEPENDENT ACCOUNTANTS
   
The Sponsors and Trustee of Municipal Investment Trust Fund,
Monthly Payment Series--555, Defined Asset Funds:
 
We hereby consent to the use in this Registration Statement No. 33-57099 of our
opinion dated February 23, 1995, relating to the Statement of Condition of
Municipal Investment Trust Fund, Monthly Payment Series-- 555, Defined Asset
Funds and to the reference to us under the heading 'Auditors' in the Prospectus
which is a part of this Registration Statement.
 
DELOITTE & TOUCHE LLP
New York, N.Y.
February 23, 1995
    
 
                                      R-8


<TABLE> <S> <C>

<ARTICLE> 6
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          JAN-31-1995
<PERIOD-END>                               FEB-23-1995
<INVESTMENTS-AT-COST>                       11,281,823
<INVESTMENTS-AT-VALUE>                      11,281,823
<RECEIVABLES>                                  187,111
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                              11,468,935
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      187,111
<TOTAL-LIABILITIES>                            187,111
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    11,281,823
<SHARES-COMMON-STOCK>                           12,000
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                11,281,823
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                                    0
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                       0
<NET-INVESTMENT-INCOME>                              0
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                                0
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                         12,000
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                               0
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                      0
<AVERAGE-NET-ASSETS>                                 0
<PER-SHARE-NAV-BEGIN>                                0
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                                  0
<EXPENSE-RATIO>                                      0
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0

</TABLE>


                                                                     EXHIBIT 3.1
                             DAVIS POLK & WARDWELL
                              450 LEXINGTON AVENUE
                            NEW YORK, NEW YORK 10017
                                 (212) 450-4000
                                                               February 23, 1995
 
MUNICIPAL INVESTMENT TRUST FUND,
MONTHLY PAYMENT SERIES--555
DEFINED ASSET FUNDS
 
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
SMITH BARNEY INC.
PAINEWEBBER INCORPORATED
PRUDENTIAL SECURITIES INCORPORATED
DEAN WITTER REYNOLDS INC.
C/O MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED
UNIT INVESTMENT TRUSTS
P.O. BOX 9051
PRINCETON, NJ 08543-9051
 
Dear Sirs:
 
     We have acted as special counsel for you, as sponsors (the 'Sponsors') of
Monthly Payment Series--555 of Municipal Investment Trust Fund, Defined Asset
Funds (the 'Fund'), in connection with the issuance of units of fractional
undivided interest in the Fund (the 'Units') in accordance with the Trust
Indenture relating to the Fund (the 'Indenture').
 
     We have examined and are familiar with originals or copies, certified or
otherwise identified to our satisfaction, of such documents and instruments as
we have deemed necessary or advisable for the purpose of this opinion.
 
     Based upon the foregoing, we are of the opinion that (i) the execution and
delivery of the Indenture and the issuance of the Units have been duly
authorized by the Sponsor and (ii) the Units, when duly issued and delivered by
the Sponsors and the Trustee in accordance with the Indenture, will be legally
issued, fully paid and non-assessable.
 
     We hereby consent to the use of this opinion as Exhibit 3.1 of the
Registration Statement relating to the Units filed under the Securities Act of
1933 and to the use of our name in such Registration Statement and in the
related prospectus under the headings 'Taxes' and 'Miscellaneous--Legal
Opinion.'
 
                                          Very truly yours,
 
                                          DAVIS POLK & WARDWELL



                                                                     EXHIBIT 4.1
 
                                                               FEBRUARY 23, 1995
 
                         KENNY S&P EVALUATION SERVICES
                      A DIVISION OF J. J. KENNY CO., INC.
 
MERRILL LYNCH PIERCE FENNER & SMITH
INCORPORATED
DEFINED ASSET FUNDS
P.O. BOX 9051
PRINCETON, NJ 08543-9051
 
THE CHASE MANHATTAN BANK, N.A.
1 CHASE MANHATTAN PLAZA--3B
NEW YORK, NEW YORK 10081
 
RE: MUNICIPAL INVESTMENT TRUST FUND, MONTHLY PAYMENT SERIES--555, DEFINED ASSET
    FUNDS
 
Gentlemen:
 
     We have examined the Registration Statement File No. 33-57099 for the above
captioned trust. We hereby acknowledge that Kenny S&P Evaluation Services, a
division of J. J. Kenny Co., Inc. is currently acting as the evaluator for the
trust. We hereby consent to the use in the Registration Statement of the
reference to Kenny S&P Evaluation Services, a division of J. J. Kenny Co., Inc.
as evaluator.
 
     In addition, we hereby confirm that the ratings indicated in the
Registration Statement for the respective bonds comprising the trust portfolio
are the ratings indicated in our KENNYBASE database as of the date of the
Evaluation Report.
 
     You are hereby authorized to file a copy of this letter with the Securities
and Exchange Commission.
 
                                          Sincerely,
 
                                          JOHN R. FITZGERALD
                                          VICE PRESIDENT



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