MUNICIPAL INVT TR FD MON PYMT SER 533 DEFINED ASSET FDS
485BPOS, 2000-01-28
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    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JANUARY 28, 2000

                                                       REGISTRATION NO. 33-50121
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549
                     -------------------------------------

                         POST-EFFECTIVE AMENDMENT NO. 6
                                       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--533
                              DEFINED ASSET FUNDS

B. NAME OF DEPOSITOR:

                   MERRILL LYNCH, PIERCE, FENNER & SMITH INC.
                           SALOMON SMITH BARNEY INC.
                       PRUDENTIAL SECURITIES INCORPORATED
                            PAINEWEBBER INCORPORATED
                           DEAN WITTER REYNOLDS INC.

C. COMPLETE ADDRESSES OF DEPOSITORS' PRINCIPAL EXECUTIVE OFFICES:

<TABLE>
<S>                        <C>                        <C>
 MERRILL LYNCH, PIERCE,
     FENNER & SMITH
      INCORPORATED
   DEFINED ASSET FUNDS
  POST OFFICE BOX 9051
PRINCETON, NJ 08543-9051                                  SALOMON SMITH BARNEY INC.
                                                       388 GREENWICH STREET--23RD FLOOR
                                                              NEW YORK, NY 10013
</TABLE>

<TABLE>
    <S>                          <C>                          <C>
      PRUDENTIAL SECURITIES      PAINEWEBBER INCORPORATED     DEAN WITTER REYNOLDS INC.
          INCORPORATED              1285 AVENUE OF THE             TWO WORLD TRADE
       ONE NEW YORK PLAZA                AMERICAS                CENTER--59TH FLOOR
       NEW YORK, NY 10292           NEW YORK, NY 10019           NEW YORK, NY 10048
</TABLE>

D. NAMES AND COMPLETE ADDRESSES OF AGENTS FOR SERVICE:

  TERESA KONCICK, ESQ.        LEE B. SPENCER, JR.         ROBERT E. HOLLEY
      P.O. BOX 9051           ONE NEW YORK PLAZA          1200 HARBOR BLVD.
PRINCETON, NJ 08543-9051      NEW YORK, NY 10292         WEEHAWKEN, NJ 07087

                                  COPIES TO:             DOUGLAS LOWE, ESQ.
                            PIERRE DE SAINT PHALLE,   DEAN WITTER REYNOLDS INC.
    MICHAEL KOCHMANN                 ESQ.                  TWO WORLD TRADE
    388 GREENWICH ST.        450 LEXINGTON AVENUE        CENTER--59TH FLOOR
   NEW YORK, NY 10013         NEW YORK, NY 10017         NEW YORK, NY 10048

The issuer has registered an indefinite number of Units under the Securities Act
of 1933 pursuant to Rule 24f-2 and filed the Rule 24f-2 Notice for the most
recent fiscal year on March 16, 1999.

Check box if it is proposed that this filing will become effective on January
31, 2000 pursuant to paragraph (b) of Rule 485.  /X/

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                           DEFINED ASSET FUNDS-SM-
                           ----------------------------------------------------

                           MUNICIPAL INVESTMENT TRUST FUND
                           MONTHLY PAYMENT SERIES--533
                           (A UNIT INVESTMENT TRUST)
                           -  PORTFOLIO OF LONG TERM MUNICIPAL BONDS
                           -  DESIGNED FOR INCOME FREE FROM REGULAR FEDERAL
                              INCOME TAX
                           -  MONTHLY INCOME DISTRIBUTIONS

SPONSORS:
MERRILL LYNCH,
PIERCE, FENNER & SMITH
INCORPORATED               -----------------------------------------------------
SALOMON SMITH BARNEY INC.  The Securities and Exchange Commission has not
PRUDENTIAL SECURITIES      approved or disapproved these Securities or passed
INCORPORATED               upon the adequacy of this prospectus. Any
PAINEWEBBER INCORPORATED   representation to the contrary is a criminal offense.
DEAN WITTER REYNOLDS INC.  Prospectus dated January 28, 2000.

<PAGE>
- --------------------------------------------------------------------------------

Defined Asset Funds-SM-
Defined Asset Funds-Registered Trademark- is America's oldest and largest family
of unit investment trusts, with over $160 billion sponsored over the last 28
years. Defined Asset Funds has been a leader in unit investment trust research
and product innovation. Our family of Funds helps investors work toward their
financial goals with a full range of quality investments, including municipal,
corporate and government bond portfolios, as well as domestic and international
equity portfolios.

Defined Asset Funds offer a number of advantages:
  - A disciplined strategy of buying and holding with a long-term view is the
    cornerstone of Defined Asset Funds.
  - Fixed portfolio: Defined Funds follow a buy and hold investment strategy;
    funds are not managed and portfolio changes are limited.
  - Defined Portfolios: We choose the stocks and bonds in advance, so you know
    what you're investing in.
  - Professional research: Our dedicated research team seeks out stocks or bonds
    appropriate for a particular fund's objectives.
  - Ongoing supervision: We monitor each portfolio on an ongoing basis.
No matter what your investment goals, tolerance for risk or time horizon,
there's probably a Defined Asset Fund that suits your investment style. Your
financial professional can help you select a Defined Asset Fund that works best
for your investment portfolio.

THE FINANCIAL INFORMATION IN THIS PROSPECTUS IS AS OF THE EVALUATION DATE,
SEPTEMBER 30, 1999.

<TABLE>
<S>                                    <C>
CONTENTS
                                       PAGE
                                       ----
Risk/Return Summary..................     3
What You Can Expect From Your
  Investment.........................     7
  Monthly Income.....................     7
  Return Figures.....................     7
  Records and Reports................     7
The Risks You Face...................     8
  Interest Rate Risk.................     8
  Call Risk..........................     8
  Reduced Diversification Risk.......     8
  Liquidity Risk.....................     8
  Concentration Risk.................     8
  Bond Quality Risk..................     9
  Insurance Related Risk.............     9
  Litigation and Legislation Risks...     9
Selling or Exchanging Units..........     9
  Sponsors' Secondary Market.........     9
  Selling Units to the Trustee.......    10
  Exchange Option....................    10
How The Fund Works...................    10
  Pricing............................    10
  Evaluations........................    11
  Income.............................    11
  Expenses...........................    11
  Portfolio Changes..................    11
  Fund Termination...................    12
  Certificates.......................    12
  Trust Indenture....................    12
  Legal Opinion......................    13
  Auditors...........................    13
  Sponsors...........................    13
  Trustee............................    13
  Underwriters' and Sponsors'
    Profits..........................    14
  Public Distribution................    14
  Code of Ethics.....................    14
  Year 2000 Issues...................    16
Taxes................................    14
Supplemental Information.............    16
Financial Statements.................   D-1
</TABLE>

                                       2
<PAGE>
- --------------------------------------------------------------------------------

RISK/RETURN SUMMARY

 1. WHAT IS THE FUND'S OBJECTIVE?
   The Fund seeks interest income that is
   exempt from regular federal income taxes
   by investing in a fixed portfolio
   consisting primarily of municipal
   revenue bonds.

2. WHAT ARE MUNICIPAL REVENUE BONDS?
   Municipal revenue bonds are bonds issued
   by states, municipalities and public
   authorities to finance the cost of
   buying, building or improving various
   projects intended to generate revenue,
   such as airports, health care
   facilities, housing and municipal
   electric, water and sewer utilities.
   Generally, payments on these bonds
   depend solely on the revenues generated
   by the projects, excise taxes or state
   appropriations, and are not backed by
   the government's taxing power.

 3. WHAT IS THE FUND'S INVESTMENT STRATEGY?

 - The Fund plans to hold to maturity 14
   long-term tax-exempt municipal bonds
   with a current aggregate face amount of
   $9,175,000. The Fund is a unit
   investment trust which means that,
   unlike a mutual fund, the Fund's
   portfolio is not managed.

 - When the bonds were initially deposited
   (October 28, 1993), they were rated A or
   better by Standard & Poor's, Moody's or
   Fitch, or in the opinion of the agent
   for the Sponsors had similar credit
   quality to bonds rated A or better. THE
   CREDIT QUALITY OF THE BONDS MAY
   CURRENTLY BE LOWER.
 - Many of the bonds can be called at a
   premium declining over time to par
   value. Some bonds may be called earlier
   at par for extraordinary reasons.
 - 24% of the bonds are insured by
   insurance companies. Insurance
   guarantees timely payments of principal
   and interest on the bonds (but not Fund
   units or the market value of the bonds
   before they mature).

   The Portfolio consists of municipal
   bonds of the following types:

  - General Obligation                       10%
  - Hospital/Health Care                     25%
  - Housing                                  22%
  - Industrial Development Revenue          17%
  - Lease Rental Appropriation                6%
  - Refunded Bonds                           6%
  - Municipal Electric Utilities             14%

 4. WHAT ARE THE SIGNIFICANT RISKS?

   YOU CAN LOSE MONEY BY INVESTING IN THE
   FUND. THIS CAN HAPPEN FOR VARIOUS
   REASONS, INCLUDING:
  - Rising interest rates, an issuer's
   worsening financial condition or a drop
   in bond ratings can reduce the price of
   your units.
  - Because the Fund is concentrated in
   hospital/health care bonds, adverse
   developments in this sector may affect
   the value of your units.
  - Assuming no changes in interest rates,
   when you sell your units, they will
   generally be worth less than your cost
   because your cost included a sales fee.
  - The Fund will receive early returns of
   principal if bonds are called or sold
   before they mature. If this happens your
   income will decline and you may not be
   able to reinvest the money you receive
   at as high a yield or as long a
   maturity.

 5. IS THIS FUND APPROPRIATE FOR YOU?

   Yes, if you want monthly income free
   from regular federal income tax. You
   will benefit from a professionally
   selected and supervised portfolio whose
   risk is reduced by investing in bonds of
   several different issuers.
   The Fund is NOT appropriate for you if
   you want a speculative investment that
   changes to take advantage of market
   movements, if you do not want a
   tax-advantaged investment or if you
   cannot tolerate any risk.

                                       3
<PAGE>

   DEFINING YOUR INCOME

   WHAT YOU MAY EXPECT (PAYABLE ON THE 25TH DAY
   OF EACH MONTH):
   Regular Monthly Income per unit                 $ 4.47
   Annual Income per unit                          $53.70
   RECORD DAY: 10th day of each month

   THESE FIGURES ARE ESTIMATES ON THE EVALUATION DATE;
   ACTUAL PAYMENTS MAY VARY.

 6. WHAT ARE THE FUND'S FEES AND EXPENSES?

   This table shows the costs and expenses
   you may pay, directly or indirectly,
   when you invest in the Fund.

   INVESTOR FEES

   Maximum Sales Fee (Load) on new
   purchases (as a percentage of
   $1,000 invested)                   2.90%

   Employees of some of the Sponsors and
   their affiliates may be charged a
   reduced sales fee of no less than $5.00
   per Unit.

   The maximum sales fee is reduced if you
   invest at least $100,000, as follows:

                             YOUR MAXIMUM
                              SALES FEE
        IF YOU INVEST:         WILL BE:
        --------------       ------------
   Less than $100,000            2.90%
   $100,000 to $249,999          2.65%
   $250,000 to $499,999          2.40%
   $500,000 to $999,999          2.15%
   $1,000,000 and over           1.90%

   Maximum Exchange Fee          1.90%

                                                   $0.70
   Trustee's Fee
                                                   $0.49
   Portfolio Supervision,
   Bookkeeping and
   Administrative Fees
   (including updating
   expenses)
   ESTIMATED ANNUAL FUND OPERATING EXPENSES
                                                   AMOUNT
                                                  PER UNIT
                                                  --------
                                                   $0.31
   Evaluator's Fee
                                                   $0.31
   Other Operating Expenses
                                                   -----
                                                   $1.81
   TOTAL

   The Sponsors historically paid updating
   expenses.

 7. HOW HAVE SIMILAR FUNDS PERFORMED IN THE PAST?

   IN THE FOLLOWING CHART WE SHOW PAST PERFORMANCE
   OF PRIOR MONTHLY PAYMENT SERIES, WHICH HAD THE
   SAME INVESTMENT OBJECTIVES, STRATEGIES AND
   TYPES OF BONDS AS THIS FUND. These prior series
   differed in that they charged a higher sales
   fee. These prior Monthly Payment Series were
   offered between February 4, 1988 and September
   26, 1996 and were outstanding on September 30,
   1999. OF COURSE, PAST PERFORMANCE OF PRIOR
   SERIES IS NO GUARANTEE OF FUTURE RESULTS OF
   THIS FUND.

   AVERAGE ANNUAL COMPOUND TOTAL RETURNS
   FOR PRIOR SERIES
   REFLECTING ALL EXPENSES. FOR PERIODS ENDED
   9/30/99.

 -------------------------------------------------------------------

<TABLE>
<CAPTION>
 High                    1.81%     6.93%     6.10%      2.95     8.13%     6.64%
 <S>                    <C>       <C>       <C>       <C>       <C>       <C>
 Average                 -2.55      4.95      5.77     -0.70      5.96      6.35
 Low                     -7.99      3.10      5.46     -5.90      3.87      6.05
</TABLE>

 -----------------------------------------------------------

<TABLE>
 <S>                    <C>       <C>       <C>       <C>       <C>       <C>
 Average
 Sales fee               1.93%     5.01%     5.77%
</TABLE>

 -----------------------------------------------------------

Note: All returns represent changes in unit price with distributions reinvested
into the Municipal Fund Investment Accumulation Program.

 8. IS THE FUND MANAGED?

   Unlike a mutual fund, the Fund is not managed and
   bonds are not sold because of market changes. Rather,
   experienced
   Defined Asset Funds financial analysts regularly
   review the bonds in the Fund. The Fund may sell a bond
   if certain adverse credit or other conditions exist.

 9. HOW DO I BUY UNITS?

   The minimum investment is one unit.

   You can buy units from any of the Sponsors and other
   broker-dealers. The Sponsors are listed later in this
   prospectus. Some banks may offer units for sale
   through special arrangements with the Sponsors,
   although certain legal restrictions may apply.

                                       4
<PAGE>
   UNIT PRICE PER UNIT                $987.00
   (as of September 30, 1999)

   Unit price is based on the net asset value of the Fund
   plus the sales fee. An amount equal to any principal
   cash, as well as net accrued but undistributed
   interest on the unit, is added to the unit price. An
   independent evaluator prices the bonds at 3:30 p.m.
   Eastern time every business day. Unit price changes
   every day with changes in the prices of the bonds in
   the Fund.

10. HOW DO I SELL UNITS?

   You may sell your units at any time to any
   Sponsor or the Trustee for the net asset
   value determined at the close of business on the date
   of sale. You will not pay any other fee when you sell
   your units.

11. HOW ARE DISTRIBUTIONS MADE AND TAXED?

   The Fund pays income monthly. In the opinion of bond
   counsel when each bond was issued, interest on the
   bonds in this Fund is generally 100% exempt from
   regular federal income tax.
   A portion of the income may also be exempt from state
   and local personal income taxes, depending on where
   you live.

   You will also receive principal payments if bonds are
   sold, called or mature, when the cash available is
   more than $5.00 per unit. You will be subject to tax
   on any gain realized by the Fund on the disposition of
   bonds.

12. WHAT OTHER SERVICES ARE AVAILABLE?

   REINVESTMENT
   You will receive your monthly income in cash unless
   you choose to compound your income by reinvesting with
   no sales fee in the Municipal Fund Investment
   Accumulation Program, Inc. This program is an open-end
   mutual fund with a comparable investment objective.
   Income from this program will generally be subject to
   state and local income taxes. FOR MORE COMPLETE
   INFORMATION ABOUT THE PROGRAM, INCLUDING CHARGES AND
   FEES, ASK THE TRUSTEE FOR THE PROGRAM'S PROSPECTUS.
   READ IT CAREFULLY BEFORE YOU INVEST. THE TRUSTEE MUST
   RECEIVE YOUR WRITTEN ELECTION TO REINVEST AT LEAST 10
   DAYS BEFORE THE RECORD DAY OF AN INCOME PAYMENT.

   EXCHANGE PRIVILEGES
   You may exchange units of this Fund for units of
   certain other Defined Asset Funds. You may also
   exchange into this Fund from certain other funds. We
   charge a reduced sales fee on exchanges.

                                       5
<PAGE>
- --------------------------------------------------------------------------------
    TAX-FREE VS. TAXABLE INCOME: A COMPARISON OF TAXABLE AND TAX-FREE YIELDS
>
<TABLE>
                                      EFFECTIVE
TAXABLE INCOME 1999*                  % TAX                                  TAX-FREE YIELD OF
  SINGLE RETURN      JOINT RETURN     BRACKET      3%        3.5%        4%        4.5%        5%        5.5%        6%
                                                                    IS EQUIVALENT TO A TAXABLE YIELD OF
<S>                <C>                <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
- ---------------------------------------------------------------------------------------------------------------------------

<S>                <C>

TAXABLE INCOME 19
  SINGLE RETURN     6.5%
                      IS
                   EQUIVALENT
                     TO A
                   TAXABLE
                   YIELD OF
- -----------------
</TABLE>
<TABLE>
<S>                <C>                <C>        <C>        <C>        <C>        <C>        <C>        <C>        <C>
$      0- 25,750   $      0- 43,050    15.00       3.53       4.12       4.71       5.29       5.88       6.47       7.06
- ---------------------------------------------------------------------------------------------------------------------------
$ 25,751- 62,450   $ 43,051-104,050    28.00       4.17       4.86       5.56       6.25       6.94       7.64       8.33
- ---------------------------------------------------------------------------------------------------------------------------
$ 62,451-130,250   $104,051-158,550    31.00       4.35       5.07       5.80       6.52       7.25       7.97       8.70
- ---------------------------------------------------------------------------------------------------------------------------
$130,251-283,150   $158,551-283,150    36.00       4.69       5.47       6.25       7.03       7.81       8.59       9.38
- ---------------------------------------------------------------------------------------------------------------------------
  OVER $283,151    OVER $283,151       39.60       4.97       5.79       6.62       7.45       8.28       9.11       9.93
- ---------------------------------------------------------------------------------------------------------------------------

<S>                <C>
$      0- 25,750     7.65
- -----------------
$ 25,751- 62,450     9.03
- -----------------
$ 62,451-130,250     9.42
                   --------
- -----------------
$130,251-283,150    10.16
                   --------
- -----------------
  OVER $283,151     10.76
                   --------
- -----------------
</TABLE>

To compare the yield of a taxable security with the yield of a federally
tax-free security, find your taxable income and read across. The table
incorporates 1999 federal income tax rates and assumes that all income would
otherwise be taxed at a U.S. 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, the possible partial disallowance of deductions
or state and local taxation. Consequently, investors are urged to consult their
own tax advisers in this regard.

                                       6
<PAGE>
WHAT YOU CAN EXPECT FROM YOUR INVESTMENT

MONTHLY INCOME

The Fund will pay you regular monthly income. Your monthly income may vary
because of:
  - elimination of one or more bonds from the Fund's portfolio because of calls,
    redemptions or sales;
  - a change in the Fund's expenses; or
  - the failure by a bond's issuer to pay interest.

Changes in interest rates generally will not affect your monthly income because
the portfolio is fixed.

Along with your monthly income, you will receive your share of any available
bond principal.

RETURN FIGURES

We cannot predict your actual return, which will vary with unit price, how long
you hold your investment and changes in the portfolio, interest income and
expenses.

ESTIMATED CURRENT RETURN equals the estimated annual cash to be received from
the bonds in the Fund less estimated annual Fund expenses, divided by the Unit
Price (including the maximum sales fee):

Estimated    Estimated
Annual Annual Expenses
Interest
Income  -
- ----------------------
      Unit Price

ESTIMATED LONG TERM RETURN is a measure of the estimated return over the
estimated life of the Fund. Unlike Estimated Current Return, Estimated Long Term
Return reflects maturities, discounts and premiums of the bonds in the Fund. It
is an average of the yields to maturity (or in certain cases, to an earlier call
date) of the individual bonds in the portfolio, adjusted to reflect the Fund's
maximum sales fee and estimated expenses. We calculate the average yield for the
portfolio by weighting each bond's yield by its market value and the time
remaining to the call or maturity date.

Yields on individual bonds depend on many factors including general conditions
of the bond markets, the size of a particular offering and the maturity and
quality rating of the particular issues. Yields can vary among bonds with
similar maturities, coupons and ratings.

These return quotations are designed to be comparative rather than predictive.

RECORDS AND REPORTS

You will receive:
- - a monthly statement of income payments and any principal payments;
- - a notice from the Trustee when new bonds are deposited in exchange or
  substitution for bonds originally deposited;
- - an annual report on Fund activity; and
- - annual tax information. THIS WILL ALSO BE SENT TO THE IRS. YOU MUST REPORT THE
  AMOUNT OF TAX-EXEMPT INTEREST RECEIVED DURING THE YEAR.

You may request:
- - copies of bond evaluations to enable you to comply with federal and state tax
  reporting requirements; and
- - audited financial statements of the Fund.
You may inspect records of Fund transactions at the Trustee's office during
regular business hours.

                                       7
<PAGE>
THE RISKS YOU FACE

INTEREST RATE RISK

Investing involves risks, including the risk that your investment will decline
in value if interest rates rise. Generally, bonds with longer maturities will
change in value more than bonds with shorter maturities. Bonds in the Fund are
more likely to be called when interest rates decline. This would result in early
returns of principal to you and may result in early termination of the Fund. Of
course, we cannot predict how interest rates may change.

CALL RISK

Many bonds can be prepaid or "called" by the issuer before their stated
maturity. For example, some bonds may be required to be called pursuant to
mandatory sinking fund provisions.

Also, an issuer might call its bonds during periods of falling interest rates,
if the issuer's bonds have a coupon higher than current market rates.

An issuer might call its bonds in extraordinary cases, including if:
  - it no longer needs the money for the original purpose;
  - the project is condemned or sold;
  - the project is destroyed and insurance proceeds are used to redeem the
    bonds;
  - any related credit support expires and is not replaced; or
  - interest on the bonds become taxable.

If the bonds are called, your income will decline and you may not be able to
reinvest the money you receive at as high a yield or as long a maturity. An
early call at par of a premium bond will reduce your return.

REDUCED DIVERSIFICATION RISK

If many investors sell their units, the Fund will have to sell bonds. This could
reduce the diversification of your investment and increase your share of Fund
expenses.

LIQUIDITY RISK

The bonds will generally trade in the over-the-counter market. We cannot assure
you that a liquid trading market will exist, especially since current law may
restrict the Fund from selling bonds to any Sponsor. The value of the bonds, and
of your investment, may be reduced if trading in bonds is limited or absent.

CONCENTRATION RISK

When a certain type of bond makes up 25% or more of the portfolio, the Fund is
said to be "concentrated" in that bond type, which makes the Fund less
diversified.

Here is what you should know about the Fund's concentration in hospital and
health care bonds.
  - payment for these bonds depends on revenues from private third-party payors
    and government programs, including Medicare and Medicaid, which have
    generally undertaken cost containment measures to limit payments to
    healthcare providers;
  - hospitals face increasing competition resulting from hospital mergers and
    affiliations;
  - hospitals need to reduce costs as HMOs increase market penetration and
    hospital supply and drug companies raise prices;
  - hospitals and health care providers are subject to various legal claims by
    patients and others and are adversely affected by increasing costs of
    insurance.

                                       8
<PAGE>
  - many hospitals are aggressively buying physician practices and assuming risk
    contracts to gain market share. If revenues do not increase accordingly,
    this practice could reduce profits;
  - Medicare is changing its reimbursement system for nursing homes. Many
    nursing home providers are not sure how they will be treated. In many cases,
    the providers may receive lower reimbursements and these would have to cut
    expenses to maintain profitability; and
  - most retirement/nursing home providers rely on entrance fees for operating
    revenues. If people live longer than expected and turnover is lower than
    budgeted, operating revenues would be adversely affected by less than
    expected entrance fees.

Changes to the portfolio from bond redemptions, maturities and sales may affect
the Fund's concentration over time.

BOND QUALITY RISK

A reduction in a bond's rating may decrease its value and, indirectly, the value
of your investment in the Fund.

INSURANCE RELATED RISK

Some bonds may be backed by insurance companies (as shown under Portfolio).
Insurance policies generally make payments only according to a bond's original
payment schedule and do not make early payments when a bond defaults or becomes
taxable. Although the federal government does not regulate the insurance
business, various state laws and federal initiatives and tax law changes could
significantly affect the insurance business. The claims-paying ability of the
insurance companies is generally rated A or better by Standard & Poor's or
another nationally recognized rating organization. The insurance company ratings
are subject to change at any time at the discretion of the rating agencies.

LITIGATION AND LEGISLATION RISKS

We do not know of any pending litigation that might have a material adverse
effect upon the Fund.

Future tax legislation could affect the value of the portfolio by:
  - limiting real property taxes,
  - reducing tax rates,
  - imposing a flat or other form of tax, or
  - exempting investment income from tax.

SELLING OR EXCHANGING UNITS

You can sell your units at any time for a price based on net asset value. Your
net asset value is calculated each business day by:
  - ADDING the value of the bonds, net accrued interest, cash and any other Fund
    assets;
  - SUBTRACTING accrued but unpaid Fund expenses, unreimbursed Trustee advances,
    cash held to buy back units or for distribution to investors and any other
    Fund liabilities; and
  - DIVIDING the result by the number of outstanding units.

Your net asset value when you sell may be more or less than your cost because of
sales fees, market movements and changes in the portfolio.

SPONSORS' SECONDARY MARKET

While we are not obligated to do so, we will buy back units at net asset value
without any other fee or charge. We may resell the units to other buyers or to
the Trustee. You should consult your financial professional for current market
prices to determine if other broker-dealers or banks are offering higher prices.

                                       9
<PAGE>
We have maintained a secondary market continuously for over 25 years, but we
could discontinue it without prior notice for any business reason.

SELLING UNITS TO THE TRUSTEE

Regardless of whether we maintain a secondary market, you can sell your units to
the Trustee at any time by sending the Trustee a letter (with any outstanding
certificates if you hold unit certificates). You must properly endorse your
certificates (or execute a written transfer instrument with signatures
guaranteed by an eligible institution). Sometimes, additional documents are
needed such as a trust document, certificate of corporate authority, certificate
of death or appointment as executor, administrator or guardian.

Within seven days after your request and the necessary documents are received,
the Trustee will mail a check to you. Contact the Trustee for additional
information.

As long as we are maintaining a secondary market, the Trustee will sell your
units to us at a price based on net asset value. If there is no secondary
market, the Trustee may sell your units in the over-the-counter market for a
higher price, but it is not obligated to do so. In that case, you will receive
the net proceeds of the sale.

If the Fund does not have cash available to pay you for units you are selling,
the agent for the Sponsors will select bonds to be sold. Bonds will be selected
based on market and credit factors. These sales could be made at times when the
bonds would not otherwise be sold and may result in your receiving less than the
unit par value and also reduce the size and diversity of the Fund.

There could be a delay in paying you for your units:
  - if the New York Stock Exchange is closed (other than customary weekend and
    holiday closings);
  - if the SEC determines that trading on the New York Stock Exchange is
    restricted or that an emergency exists making sale or evaluation of the
    bonds not reasonably practicable; and
  - for any other period permitted by SEC order.

EXCHANGE OPTION

You may exchange units of certain Defined Asset Funds for units of this Fund at
a maximum exchange fee of 1.90%. You may exchange units of this Fund for units
of certain other funds at a reduced sales fee if your investment goals change.
To exchange units, you should talk to your financial professional about what
funds are exchangeable, suitable and currently available.

Normally, an exchange is taxable and you must recognize any gain or loss on the
exchange. However, the IRS may try to disallow a loss if the portfolios of the
two funds are not materially different; you should consult your own tax adviser.

We may amend or terminate this exchange option at any time without notice.

HOW THE FUND WORKS

PRICING

The price of a unit includes interest accrued on the bonds, less expenses, from
the most recent Record Day up to, but not including, the settlement date, which
is usually three business days after the purchase date of the unit.

A portion of the price of a unit consists of cash so that the Trustee can
provide you with regular monthly income. When you sell your units you will
receive your share of this cash.

                                       10
<PAGE>
EVALUATIONS

An independent Evaluator values the bonds on each business day (excluding
Saturdays, Sundays and the following holidays as observed by the New York Stock
Exchange: New Year's Day, Presidents' Day, Martin Luther King, Jr. Day, Good
Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas).
Bond values are based on current bid or offer prices for the bonds or comparable
bonds. In the past, the difference between bid and offer prices of publicly
offered tax-exempt bonds has ranged from 0.5% of face amount on actively traded
issues to 3.5% on inactively traded issues; the difference has averaged between
1 and 2%.

INCOME

The Trustee credits interest to an Income Account and other receipts to a
Capital Account. The Trustee may establish a Reserve Account by withdrawing from
these accounts amounts it considers appropriate to pay any material liability.
These accounts do not bear interest.

EXPENSES

The Trustee is paid monthly. It also benefits when it holds cash for the Fund in
non-interest bearing accounts. The Trustee may also receive additional amounts:
  - to reimburse the Trustee for the Fund's operating expenses;
  - for extraordinary services and costs of indemnifying the Trustee and the
    Sponsors;
  - costs of actions taken to protect the Fund and other legal fees and
    expenses;
  - expenses for keeping the Fund's registration statement current; and
  - Fund termination expenses and any governmental charges.

The Sponsors are currently reimbursed up to 55 CENTS per $1,000 face amount
annually for providing portfolio supervisory, bookkeeping and administrative
services and for any other expenses properly chargeable to the Fund. Legal,
typesetting, electronic filing and regulatory filing fees and expenses
associated with updating the Portfolio's registration statement yearly are also
now chargeable to the Portfolio. While this fee may exceed the amount of these
costs and expenses attributable to this Fund, the total of these fees for all
Series of Defined Asset Funds will not exceed the aggregate amount attributable
to all of these Series for any calendar year. The Fund also pays the Evaluator's
fees.

The Trustee's, Sponsors' and Evaluator's fees may be adjusted for inflation
without investors' approval.

The Sponsors will pay advertising and selling expenses at no charge to the Fund.
If Fund expenses exceed initial estimates, the Fund will owe the excess. The
Trustee has a lien on Fund assets to secure reimbursement of Fund expenses and
may sell bonds if cash is not available.

PORTFOLIO CHANGES

The Sponsors and Trustee are not liable for any default or defect in a bond.

Unlike a mutual fund, the portfolio is designed to remain intact and we may keep
bonds in the portfolio even if their credit quality declines or other adverse
financial circumstances occur. However, we may sell a bond in certain cases if
we believe that certain adverse credit conditions exist or if a bond becomes
taxable.

If we maintain a secondary market in units but are unable to sell the units that
we buy in the secondary market, we will redeem units, which

                                       11
<PAGE>
will affect the size and composition of the portfolio. Units offered in the
secondary market may not represent the same face amount of bonds that they did
originally.

We decide whether or not to offer units for sale that we acquire in the
secondary market after reviewing:
  - diversity of the portfolio;
  - size of the Fund relative to its original size;
  - ratio of Fund expenses to income;
  - current and long-term returns;
  - degree to which units may be selling at a premium over par; and
  - cost of maintaining a current prospectus.

FUND TERMINATION

The Fund will terminate following the stated maturity or sale of the last bond
in the portfolio. The Fund may also terminate earlier with the consent of
investors holding 51% of the units or if total assets of the Fund have fallen
below 40% of the face amount of bonds deposited. We will decide whether to
terminate the Fund early based on the same factors used in deciding whether or
not to offer units in the secondary market.

When the Fund is about to terminate you will receive a notice, and you will be
unable to sell your units after that time. On or shortly before termination, we
will sell any remaining bonds, and you will receive your final distribution. Any
bond that cannot be sold at a reasonable price may continue to be held by the
Trustee in a liquidating trust pending its final sale.

You will pay your share of the expenses associated with termination, including
brokerage costs in selling bonds. This may reduce the amount you receive as your
final distribution.

CERTIFICATES

Certificates for units are issued on request. You may transfer certificates by
complying with the requirements for redeeming certificates, described above. You
can replace lost or mutilated certificates by delivering satisfactory indemnity
and paying the associated costs.

TRUST INDENTURE

The Fund is a "unit investment trust" governed by a Trust Indenture, a contract
among the Sponsors, the Trustee and the Evaluator, which sets forth their duties
and obligations and your rights. A copy of the Indenture is available to you on
request to the Trustee. The following summarizes certain provisions of the
Indenture.

The Sponsors and the Trustee may amend the Indenture without your consent:
  - to cure ambiguities;
  - to correct or supplement any defective or inconsistent provision;
  - to make any amendment required by any governmental agency; or
  - to make other changes determined not to be materially adverse to your best
    interest (as determined by the Sponsors).

Investors holding 51% of the units may amend the Indenture. Every investor must
consent to any amendment that changes the 51% requirement. No amendment may
reduce your interest in the Fund without your written consent.

The Trustee may resign by notifying the Sponsors. The Sponsors may remove the
Trustee without your consent if:
  - it fails to perform its duties and the Sponsors determine that its
    replacement is in your best interest; or

                                       12
<PAGE>
  - it becomes incapable of acting or bankrupt or its affairs are taken over by
    public authorities.

Investors holding 51% of the units may remove the Trustee. The Evaluator may
resign or be removed by the Sponsors and the Trustee without the consent of
investors. The resignation or removal of either becomes effective when a
successor accepts appointment. The Sponsors will try to appoint a successor
promptly; however, if no successor has accepted within 30 days after notice of
resignation, the resigning Trustee or Evaluator may petition a court to appoint
a successor.

Any Sponsor may resign as long as one Sponsor with a net worth of $2 million
remains and agrees to the resignation. The remaining Sponsors and the Trustee
may appoint a replacement. If there is only one Sponsor and it fails to perform
its duties or becomes bankrupt the Trustee may:
  - remove it and appoint a replacement Sponsor;
  - liquidate the Fund; or
  - continue to act as Trustee without a Sponsor.

Merrill Lynch, Pierce, Fenner & Smith Incorporated acts as agent for the
Sponsors.

The Trust Indenture contains customary provisions limiting the liability of the
Trustee, the Sponsors and the Evaluator.

LEGAL OPINION

Davis Polk & Wardwell, 450 Lexington Avenue, New York, New York 10017, as
special counsel for the Sponsors, has given an opinion that the units are
validly issued.

AUDITORS

Deloitte & Touche LLP, 2 World Financial Center, New York, New York 10281,
independent accountants, audited the Statement of Condition included in this
prospectus.

SPONSORS

The Sponsors are:
MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED (a wholly-owned subsidiary of
Merrill Lynch & Co., Inc.)
P.O. Box 9051,
Princeton, NJ 08543-9051
SALOMON SMITH BARNEY INC. (an indirectly wholly-owned subsidiary of Citigroup
Inc.)
388 Greenwich Street--23rd Floor,
New York, NY 10013
DEAN WITTER REYNOLDS INC. (a principal operating subsidiary of Morgan Stanley
Dean Witter & Co.)
Two World Trade Center--59th Floor,
New York, NY 10048
PRUDENTIAL SECURITIES INCORPORATED (an indirect wholly-owned subsidiary of the
Prudential Insurance Company of America)
One New York Plaza
New York, NY 10292
PAINEWEBBER INCORPORATED (a wholly-owned subsidiary of PaineWebber Group Inc.)
1285 Avenue of the Americas,
New York, NY 10019

Each Sponsor is a Delaware corporation and it, or its predecessor, has acted as
sponsor to many unit investment trusts. As a registered broker-dealer each
Sponsor buys and sells securities (including investment company shares) for
others (including investment companies) and participates as an underwriter in
various selling groups.

TRUSTEE

The Chase Manhattan Bank, Unit Investment Trust Department, 4 New York
Plaza--6th Floor, New York, New York 10004, is the Trustee. It is supervised by
the Federal

                                       13
<PAGE>
Deposit Insurance Corporation, the Board of Governors of the Federal Reserve
System and New York State banking authorities.

UNDERWRITERS' AND SPONSORS' PROFITS

Underwriters receive sales charges when they sell units. The Sponsors also
realized a profit or loss on the initial deposit of the bonds. Any cash made
available by you to the Sponsors before the settlement date for those units may
be used in the Sponsors' businesses to the extent permitted by federal law and
may benefit the Sponsors.

A Sponsor or Underwriter may realize profits or sustain losses on bonds in the
Fund which were acquired from underwriting syndicates of which it was a member.

In maintaining a secondary market, 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 or redeem them.

PUBLIC DISTRIBUTION

The Sponsors do not intend to qualify units for sale in any foreign countries.
This prospectus does not constitute an offer to sell units in any country where
units cannot lawfully be sold.

CODE OF ETHICS

Merrill Lynch, as agent for the Sponsors, has adopted a code of ethics requiring
preclearance and reporting of personal securities transactions by its employees
with access to information on portfolio transactions. The goal of the code is to
prevent fraud, deception or misconduct against the Fund and to provide
reasonable standards of conduct.

YEAR 2000 ISSUES

Many computer systems were designed in such a way that they may be unable to
distinguish between the year 2000 and the year 1900 (commonly known as the "Year
2000 Problem"). We do not expect that the computer system changes necessary to
prepare for the Year 2000 will cause any major operational difficulties for the
Fund. The Year 2000 Problem may adversely affect the issuers of the bonds
contained in the Portfolio, but we cannot predict whether any impact will be
material to the Fund as a whole.

TAXES

The following summary describes some of the important income tax consequences of
holding units. It assumes that you are not a dealer, financial institution,
insurance company or other investor with special circumstances or subject to
special rules. You should consult your own tax adviser about your particular
circumstances.

At the date of issue of each bond, counsel for the issuer delivered an opinion
to the effect that interest on the bond is exempt from regular federal income
tax. However, interest may be subject to state and local taxes and may be taken
into account in determining your preference items for alternate minimum
purposes. Neither we nor our counsel have reviewed the issuance of the bonds,
related proceedings or the basis for the opinions of counsel for the issuers. We
cannot assure you that the issuer (or other users) have complied or will comply
with any requirements necessary for a bond to be tax-exempt. If any of the bonds
were determined not to be tax-exempt, you could be required to pay income tax
for current and prior years, and if the Fund were to sell the bond, it might
have to sell it at a substantial discount.

                                       14
<PAGE>
In the opinion of our counsel, under existing law:

GENERAL TREATMENT OF THE FUND AND YOUR INVESTMENT

The Fund will not be taxed as a corporation for federal income tax purposes, and
you will be considered to own directly your share of each bond in the Fund.

GAIN OR LOSS UPON DISPOSITION

When all or part of your share of a bond is disposed of (for example, when the
Fund sells, exchanges or redeems a bond or when you sell or exchange your
units), you will generally recognize capital gain or loss. Your gain, however,
will generally be ordinary income to the extent of any accrued "market
discount". Generally you will have market discount to the extent that your basis
in a bond when you purchase a unit is less than its stated redemption price at
maturity (or, if it is an original issue discount bond, the issue price
increased by original issue discount that has accrued on the bond before your
purchase). You should consult your tax adviser in this regard.

If your net long-term capital gains exceed your net short-term capital losses,
the excess may be subject to tax at a lower rate than ordinary income. Any
capital gain from the Fund will be long-term if you are considered to have held
your investment on each bond for more than one year and short-term otherwise. If
you are an individual and sell your units after holding them for more than one
year, you may be entitled to a 20% maximum federal tax rate on any resulting
gains. Consult your tax adviser in this regard. Because the deductibility of
capital losses is subject to limitations, you may not be able to deduct all of
your capital losses.

YOUR BASIS IN THE BONDS

Your aggregate basis in the bonds will be equal to the cost of your units,
including any sales charges and the organizational expenses you pay, adjusted to
reflect any accruals of "original issue discount," "acquisition premium" and
"bond premium". You should consult your tax adviser in this regard.

EXPENSES

If you are not a corporate investor, you will not be entitled to a deduction for
your share of fees and expenses of the Fund. Also, if you borrowed money in
order to purchase or carry your units, you will not be able to deduct the
interest on this borrowing for federal income tax purposes. The IRS may treat
your purchase of units as made with borrowed money even if the money is not
directly traceable to the purchase of units.

STATE AND LOCAL TAXES

Under the income tax laws of the State and City of New York, the Fund will not
be taxed as a corporation. If you are a New York taxpayer, your income from the
Fund will not be tax-exempt in New York except to the extent that the income is
earned on bonds that are tax-exempt for New York purposes. Depending on where
you live, your income from the Fund may be subject to state and local taxation.
You should consult your tax adviser in this regard.

                                       15
<PAGE>
SUPPLEMENTAL INFORMATION

You can receive at no cost supplemental information about the Fund by calling
the Trustee. The supplemental information includes more detailed risk disclosure
about the types of bonds that may be in the Fund's portfolio, general risk
disclosure concerning any insurance securing certain bonds, and general
information about the structure and operation of the Fund. The supplemental
information is also available from the SEC.

                                       16
<PAGE>
          MUNICIPAL INVESTMENT TRUST FUND,
          MONTHLY PAYMENT SERIES - 533,
          DEFINED ASSET FUNDS

          REPORT OF INDEPENDENT ACCOUNTANTS

          The Sponsors, Trustee and Holders
          of Municipal Investment Trust Fund,
          Monthly Payment Series - 533, Defined Asset Funds:

          We have audited the accompanying statement of condition of
          Municipal Investment Trust Fund, Monthly Payment Series - 533,
          Defined Asset Funds, including the portfolio, as of September
          30, 1999 and the related statements of operations and of
          changes in net assets for the years ended September 30, 1999,
          1998 and 1997. These financial statements are the
          responsibility of the Trustee. Our responsibility is to express
          an opinion on these financial statements based on our audits.

          We conducted our audits 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 statements are free of material misstatement. An
          audit includes examining, on a test basis, evidence supporting
          the amounts and disclosures in the financial statements.
          Securities owned at September 30, 1999, as shown in such
          portfolio, were confirmed to us by The Chase Manhattan Bank,
          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 audits provide a reasonable
          basis for our opinion.

          In our opinion, the financial statements referred to above
          present fairly, in all material respects, the financial
          position of Municipal Investment Trust Fund, Monthly Payment
          Series - 533, Defined Asset Funds at September 30, 1999 and the
          results of its operations and changes in its net assets for the
          above-stated years in conformity with generally accepted
          accounting principles.


          DELOITTE & TOUCHE LLP

          New York, N.Y.
          January 17, 2000


                                     D - 1.
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
MONTHLY PAYMENT SERIES - 533, DEFINED ASSET FUNDS

STATEMENT OF CONDITION
As of September 30, 1999

<TABLE>
<S>                                                                                                <C>
TRUST PROPERTY:
  Investment in marketable securities
     at value (cost $ 9,097,248)(Note 1) .........                                               $   8,810,085
  Accrued interest................................                                                     159,681
  Cash - principal ...............................                                                      10,636
                                                                                                 -------------
    Total trust property .........................                                                   8,980,402


LESS LIABILITIES:
  Income advance from Trustee.....................                              $      44,415
  Accrued Sponsors' fees .........................                                      2,932           47,347
                                                                                -------------    -------------


NET ASSETS, REPRESENTED BY:
  9,182 units of fractional undivided
     interest outstanding (Note 3) ...............                                  8,820,721

  Undistributed net investment income ............                                    112,334    $   8,933,055
                                                                                -------------    =============

UNIT VALUE ($ 8,933,055 / 9,182 units)............                                               $      972.89
                                                                                                 =============
</TABLE>

                       See Notes to Financial Statements.


                                     D - 2.
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
MONTHLY PAYMENT SERIES - 533, DEFINED ASSET FUNDS

STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>

                                                           Years Ended September 30,
                                                     1999            1998            1997
                                                     ----            ----            ----

<S>                                           <C>              <C>               <C>
INVESTMENT INCOME:

  Interest income ........................    $   521,962      $   543,070       $   556,458
  Trustee's fees and expenses ............        (11,922)         (12,458)          (12,768)
  Sponsors' fees .........................         (3,870)          (3,701)           (3,625)
                                              ----------------------------------------------
  Net investment income ..................        506,170          526,911           540,065
                                              ----------------------------------------------


REALIZED AND UNREALIZED GAIN (LOSS)
  ON INVESTMENTS:
  Realized gain on
    securities sold or redeemed ..........         15,862           14,036
  Unrealized appreciation (depreciation)
    of investments .......................       (637,323)         405,644           434,458
                                              ----------------------------------------------
  Net realized and unrealized
    gain (loss) on investments ...........       (621,461)         419,680           434,458
                                              ----------------------------------------------



NET INCREASE (DECREASE) IN NET ASSETS
  RESULTING FROM OPERATIONS ..............    $  (115,291)     $   946,591       $   974,523
                                              ==============================================
</TABLE>

                       See Notes to Financial Statements.


                                     D - 3.
<PAGE>

MUNICIPAL INVESTMENT TRUST FUND,
MONTHLY PAYMENT SERIES - 533, DEFINED ASSET FUNDS



STATEMENTS OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
                                                           Years Ended September 30,
                                                     1999            1998            1997
                                                     ----            ----            ----
<S>                                           <C>              <C>               <C>
OPERATIONS:
  Net investment income ..................    $   506,170      $   526,911       $   540,065
  Realized gain on
    securities sold or redeemed ..........         15,862           14,036
  Unrealized appreciation (depreciation)
    of investments .......................       (637,323)         405,644           434,458
                                              ----------------------------------------------
  Net increase in net assets
    resulting from operations ............       (115,291)         946,591           974,523
                                              ----------------------------------------------
DISTRIBUTIONS TO HOLDERS (Note 2):
  Income  ................................       (506,986)        (526,966)         (540,100)
  Principal ..............................        (18,806)
                                              ----------------------------------------------
  Total distributions ....................       (525,792)        (526,966)         (540,100)
                                              ----------------------------------------------
SHARE TRANSACTIONS:
  Redemption amounts - income ............         (3,697)          (5,530)
  Redemption amounts - principal .........       (358,491)        (467,138)
                                              ----------------------------------------------
  Total share transactions ...............       (362,188)        (472,668)
                                              ----------------------------------------------

NET INCREASE (DECREASE) IN NET ASSETS ....     (1,003,271)         (53,043)          434,423

NET ASSETS AT BEGINNING OF YEAR ..........      9,936,326        9,989,369         9,554,946
                                              ----------------------------------------------
NET ASSETS AT END OF YEAR ................    $ 8,933,055      $ 9,936,326       $ 9,989,369
                                              ==============================================
PER UNIT:
  Income distributions during
    year .................................    $     53.87      $     53.96       $     54.01
                                              ==============================================
  Principal distributions during
    year .................................    $      1.98
                                              =================
  Net asset value at end of
    year .................................    $    972.89      $  1,041.76       $    998.94
                                              ==============================================
TRUST UNITS:
  Redeemed during year ...................            356              462
  Outstanding at end of year .............          9,182            9,538            10,000
                                              ==============================================
</TABLE>

                       See Notes to Financial Statements.


                                     D - 4.
<PAGE>
 MUNICIPAL INVESTMENT TRUST FUND,
 MONTHLY PAYMENT SERIES - 533, DEFINED ASSET FUNDS




      NOTES TO FINANCIAL STATEMENTS

1.    SIGNIFICANT ACCOUNTING POLICIES

      The Fund is registered under the Investment Company Act of 1940 as a Unit
      Investment Trust. The following is a summary of significant accounting
      policies consistently followed by the Fund in the preparation of its
      financial statements. The policies are in conformity with generally
      accepted accounting principles.

      (A)      Securities are stated at value as determined by the
               Evaluator based on bid side evaluations for the securities.

      (B)      The Fund is not subject to income taxes. Accordingly, no
               provision for such taxes is required.

      (C)      Interest income is recorded as earned.


2.    DISTRIBUTIONS

      A distribution of net investment income is made to Holders each month.
      Receipts other than interest, after deductions for redemptions and
      applicable expenses, are also distributed periodically.


3.    NET CAPITAL

<TABLE>
<S>                                                                                                <C>
     Cost of 9,182 units at Date of Deposit .....................                                  $ 9,540,098
     Less sales charge ..........................................                                      429,331
                                                                                                    -----------
     Net amount applicable to Holders ...........................                                    9,110,767
     Redemptions of units - net cost of 818 units redeemed
       less redemption amounts (principal).......................                                      (13,974)
     Realized gain on securities sold or redeemed ...............                                       29,897
     Principal distributions ....................................                                      (18,806)
     Net unrealized depreciation of investments..................                                     (287,163)
                                                                                                    -----------

     Net capital applicable to Holders ..........................                                  $ 8,820,721
                                                                                                    ===========
</TABLE>

4.    INCOME TAXES

      As of September 30, 1999, net unrealized depreciation of investments,
      based on cost for Federal income tax purposes, aggregated $287,163, of
      which $335,606 related to depreciated securities and $48,443 related to
      appreciated securities. The cost of investment securities for Federal
      income tax purposes was $9,097,248 at September 30, 1999.


                                     D - 5.
<PAGE>
    MUNICIPAL INVESTMENT TRUST FUND,
    MONTHLY PAYMENT SERIES - 533, DEFINED ASSET FUNDS



    PORTFOLIO
    As of September 30, 1999

<TABLE>
<CAPTION>
                                              Rating                                             Optional
    Portfolio No. and Title of                  of         Face                                 Redemption
           Securities                       Issues(1)      Amount    Coupon      Maturities(3) Provisions(3)    Cost      Value(2)
           ----------                       ---------  ----------- -----------   -----------   ------------  ----------  ---------

<S>                                         <C>        <C>         <C>           <C>          <C>          <C>         <C>
 1  Butler Cnty., PA, Indl. Dev. Auth.,       A        $   750,000    5.750  %     2016         06/01/03   $   740,610 $   723,458
    Hlth. Ctr. Rev. Rfdg. Bonds, Ser. 1993,                                                     @ 102.000
    Pittsburgh Lifetime Care Cmnty.
    (Sherwood Oaks Proj.)

 2  Central California Jt. Pwr. Hlth. Fin.    Baa1(m)      750,000    5.000        2023         02/01/03       685,538     640,515
    Auth., Certs. of Part. (Cmnty. Hosp.                                                        @ 100.000
    of Central California Proj.), Ser. 1993


 3  Chicago Metro. Hsg. Dev. Corp.,           Aaa(m)       520,000    5.600        2025         10/01/04       521,300     498,056
    (Chicago, IL) Hsg. Dev. Rev. Rfdg.                                                          @ 100.000
    Bonds, (FHA-Ins. Mtge. Loan, Section
    8 Assisted Proj., Academy Square),

 4  City of Valdez, AK, Marine Terminal       AA+          800,000    5.850        2025         08/01/03       820,448     784,264
    Rev. Rfdg. Bonds (BP Pipelines (Alaska)                                                     @ 102.000
    Inc. Proj.), Ser. 1993 A

 5  El Paso Cnty., CO., Sch. Dist. # 20,      AA-          220,000    5.550        2011         12/15/03       218,739     223,208
    G.O. Rfdg. Bonds, Ser. 1993 A                                                               @ 101.000

 6  Indiana Hlth. Fac. Fin. Auth., Hosp.      A            540,000    5.625        2023(5)      07/01/03       526,640     569,090
    Rfdg. Rev. Bonds (Welborn Mem. Baptist                                                      @ 102.000
    Hosp. Proj.), Ser. 1993

 7  Maine State Hsg. Auth. Mtge. Purchase     AA           750,000    5.550        2018         11/15/03       753,750     720,083
    Bonds, Ser. 1993 A - 1                                                                      @ 102.000

 8  New York City, NY, G.O. Bonds, Fiscal     A(f)         730,000    5.375        2020         10/01/03       697,500     680,046
    1994 Ser. C                                                                                 @ 101.500

</TABLE>


                                     D - 6.
<PAGE>
    MUNICIPAL INVESTMENT TRUST FUND,
    MONTHLY PAYMENT SERIES - 533, DEFINED ASSET FUNDS



    PORTFOLIO
    As of September 30, 1999

<TABLE>
<CAPTION>
                                              Rating                                             Optional
    Portfolio No. and Title of                  of         Face                                 Redemption
           Securities                       Issues(1)      Amount    Coupon      Maturities(3) Provisions(3)    Cost      Value(2)
           ----------                       ---------  ----------- -----------   -----------   ------------  ----------  ---------

<S>                                         <C>        <C>         <C>           <C>          <C>          <C>         <C>
 9  North Carolina Eastern Mun. Pwr. Agy.,    Bbb+(f)  $   580,000    6.000  %     2013         01/01/03   $   603,919 $   586,432
    Pwr. Sys. Rev. Bonds, Rfdg.                                                                 @ 102.000
    Ser. 1993 B

10  Sabine River Auth. of Texas,              AAA          750,000    5.550        2022         11/01/03       748,125     720,143
    Collateralized Poll. Ctl. Rev. Rfdg.                                                        @ 102.000
    Bonds (Texas Util. Elec. Co. Proj.),
    Ser. 1993 (FSA Ins.) (4)

11  South Carolina Pub. Svc. Auth., Rev.      AAA          685,000    5.500        2021         01/01/03       690,631     650,798
    Bonds, 1993 Rfdg. Ser. A (MBIA Ins.)(4)                                                     @ 102.000

12  The Comanche Cnty. Hosp. Auth.,           AAA          750,000    5.375        2023         07/01/03       736,298     688,328
    (Lawton, OK), Hosp. Rev. Bonds,                                                             @ 100.000
    Ser. 1993 A (Connie Lee Ins.)(4)

13  Tippacanoe Valley Middle Sch. Bldg.       A            600,000    5.500        2014         01/15/04       600,000     601,524
    Corp. (Fulton Cnty. and Kosciusko Cnty.,                                                    @ 102.000
    IN), First Mtge. Bonds, Ser. 1993

14  Wisconsin Hsg. and Econ. Dev. Auth.,      AA-          750,000    5.650        2023         10/01/03       753,750     724,140
    Hsg. Rev. Bonds, 1993 Ser. A                                                                @ 102.000

                                                         ---------                                           ---------   ---------
                                                       $ 9,175,000                                         $ 9,097,248 $ 8,810,085
                                                         =========                                           =========   =========
</TABLE>

                             See Notes to Portfolio.


                                     D - 7.
<PAGE>

 MUNICIPAL INVESTMENT TRUST FUND,
 MONTHLY PAYMENT SERIES - 533, DEFINED ASSET FUNDS



 NOTES TO PORTFOLIO
 As of September 30, 1999

(1)   The ratings of the bonds are by Standard & Poor's Ratings Group, or by
      Moody's Investors Service, Inc. if followed by "(m)", or by Fitch
      Investors Service, Inc. if followed by "(f)"; "NR" indicates that this
      bond is not currently rated by any of the above-mentioned rating services.
      These ratings have been furnished by the Evaluator but not confirmed with
      the rating agencies.

(2)   See Notes to Financial Statements.

(3)   Optional redemption provisions, which may be exercised in whole or in
      part, are initially at prices of par plus a premium, then subsequently at
      prices declining to par. Certain securities may provide for redemption at
      par prior or in addition to any optional or mandatory redemption dates or
      maturity, for example, through the operation of a maintenance and
      replacement fund, 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 securities. Many of the securities are
      also subject to mandatory sinking fund redemption commencing on dates
      which may be prior to the date on which securities may be optionally
      redeemed. Sinking fund redemptions are at par and redeem only part of the
      issue. Some of the securities have mandatory sinking funds which contain
      optional provisions permitting the issuer to increase the principal amount
      of securities 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 securities
      have an offering side evaluation which represents a premium over par. To
      the extent that the securities were acquired at a price higher than the
      redemption price, this will represent a loss of capital when compared with
      the Public Offering Price of the Units when acquired. Distributions will
      generally be reduced by the amount of the income which would otherwise
      have been paid with respect to redeemed securities and there will be
      distributed to Holders any principal amount and premium received on such
      redemption after satisfying any redemption requests for Units received by
      the Fund. The estimated current return may be affected by redemptions.

(4)   Insured by the indicated municipal bond insurance company.

(5)   Bonds with an aggregate face amount of $ 540,000 have been pre-refunded
      and are expected to be called for redemption on the optional redemption
      provision date shown.


                                     D - 8.
<PAGE>
DEFINED ASSET FUNDS-SM-

HAVE QUESTIONS ?                         MUNICIPAL INVESTMENT TRUST FUND
Request the most recent free             MONTHLY PAYMENT SERIES--533
Information Supplement                   (A Unit Investment Trust)
that gives more details about            ---------------------------------------
the Fund, by calling:                    This Prospectus does not contain
The Chase Manhattan Bank                 complete information about the
1-800-323-1508                           investment company filed with the
                                         Securities and Exchange Commission in
                                         Washington, D.C. under the:
                                         - Securities Act of 1933 (file no.
                                         33-50121) and
                                         - Investment Company Act of 1940 (file
                                         no. 811-1777).
                                         TO OBTAIN COPIES AT PRESCRIBED RATES--
                                         WRITE: Public Reference Section of the
                                         Commission
                                         450 Fifth Street, N.W., Washington,
                                         D.C. 20549-6009
                                         CALL: 1-800-SEC-0330.
                                         VISIT: http://www.sec.gov.
                                         ---------------------------------------
                                         No person is authorized to give any
                                         information or representations about
                                         this Fund not contained in this
                                         Prospectus or the Information
                                         Supplement, and you should not rely on
                                         any other information.
                                         ---------------------------------------
                                         When units of this Fund are no longer
                                         available, this Prospectus may be used
                                         as a preliminary prospectus for a
                                         future series, but some of the
                                         information in this Prospectus will be
                                         changed for that series.
                                         UNITS OF ANY FUTURE SERIES MAY NOT BE
                                         SOLD NOR MAY OFFERS TO BUY BE ACCEPTED
                                         UNTIL THAT SERIES HAS BECOME EFFECTIVE
                                         WITH THE SECURITIES AND EXCHANGE
                                         COMMISSION. NO UNITS CAN BE SOLD IN ANY
                                         STATE WHERE A SALE WOULD BE ILLEGAL.
                                                                     14632--1/00
<PAGE>
                        MUNICIPAL INVESTMENT TRUST FUND
                             MONTHLY PAYMENT SERIES
                              DEFINED ASSET FUNDS
                       CONTENTS OF REGISTRATION STATEMENT

    This Post-Effective Amendment to 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 Defined Asset Funds Municipal Insured
Series, 1933 Act File No. 33-54565).

    The Prospectus.

    The Signatures.

The following exhibits:

    1.1.1-- Form of Standard Terms and Conditions of Trust Effective as of
           October 21, 1993 (incorporated by reference to Exhibit 1.1.1 to the
           Registration Statement of Municipal Investment Trust Fund,
           Multi-state Series--48, 1933 Act File No. 33-50247).

    4.1 --Consent of the Evaluator.

    5.1 --Consent of independent accountants.

    9.1 -- Information Supplement (incorporated by reference to Exhibit 9.1 to
          Amendment No. 1 to the Registration Statement of Municipal Investment
          Trust Fund, Multistate Series--409, 1933 Act File No. 333-81777).

                                      R-1
<PAGE>
                        MUNICIPAL INVESTMENT TRUST FUND
                          MONTHLY PAYMENT SERIES--533
                              DEFINED ASSET FUNDS

                                   SIGNATURES

    PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT,
MUNICIPAL INVESTMENT TRUST FUND, MONTHLY PAYMENT SERIES--533, DEFINED ASSET
FUNDS CERTIFIES THAT IT MEETS ALL OF THE REQUIREMENTS FOR EFFECTIVENESS OF THIS
REGISTRATION STATEMENT PURSUANT TO RULE 485(B) UNDER THE SECURITIES ACT OF 1933
AND 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 28TH DAY OF
JANUARY, 2000.

             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 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 Salomon 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 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 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 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: 333-70593

     GEORGE A. SCHIERIN
     JOHN L. STEFFENS
     By J. DAVID MEGLEN
       (As authorized signatory for Merrill Lynch, Pierce,
       Fenner & Smith Incorporated and
       Attorney-in-fact for the persons listed above)

                                      R-3
<PAGE>
                           SALOMON SMITH BARNEY INC.
                                   DEPOSITOR

<TABLE>
<S>                                                           <C>
By the following persons, who constitute a majority of        Powers of Attorney
  the Board of Directors of Salomon Smith Barney Inc.:          have been filed
                                                                under the 1933 Act
                                                                File Numbers:
                                                                333-63417 and
                                                                333-63033
</TABLE>

     MICHAEL A. CARPENTER
     DERYCK C. MAUGHAN

     By GINA LEMON
       (As authorized signatory for
       Salomon Smith Barney Inc. and
       Attorney-in-fact for the persons listed above)

                                      R-4
<PAGE>
                       PRUDENTIAL SECURITIES INCORPORATED
                                   DEPOSITOR

<TABLE>
<S>                                                                     <C>
By the following persons, who constitute a majority of                  Powers of Attorney
  the Board of Directors of Prudential Securities                         have been filed
  Incorporated:                                                           under Form SE and
                                                                          the following 1933
                                                                          Act File Numbers:
                                                                          33-41631 and
                                                                          333-15919
</TABLE>

     ROBERT C. GOLDEN
     ALAN D. HOGAN
     A. LAURENCE NORTON, JR.
     LELAND B. PATON
     VINCENT T. PICA II
     MARTIN PFINSGRAFF
     HARDWICK SIMMONS
     LEE B. SPENCER, JR.
     BRIAN M. STORMS

     By RICHARD R. HOFFMANN
       (As authorized signatory for Prudential Securities
       Incorporated and Attorney-in-fact for the persons
       listed above)

                                      R-5
<PAGE>
                            PAINEWEBBER INCORPORATED
                                   DEPOSITOR

<TABLE>
<S>                                       <C>
By the following persons, who constitute  Powers of Attorney have been filed
  the Board of Directors of PaineWebber     under
  Incorporated:                             the following 1933 Act File
                                            Number: 33-55073
</TABLE>

     MARGO N. ALEXANDER
     TERRY L. ATKINSON
     BRIAN M. BAREFOOT
     STEVEN P. BAUM
     MICHAEL CULP
     REGINA A. DOLAN
     JOSEPH J. GRANO, JR.
     EDWARD M. KERSCHNER
     JAMES P. MacGILVRAY
     DONALD B. MARRON
     ROBERT H. SILVER
     MARK B. SUTTON
     By ROBERT E. HOLLEY
       (As authorized signatory for
       PaineWebber Incorporated
       and Attorney-in-fact for the persons listed above)

                                      R-6
<PAGE>
                           DEAN WITTER REYNOLDS INC.
                                   DEPOSITOR

<TABLE>
<S>                                       <C>
By the following persons, who constitute  Powers of Attorney have been filed
  a majority of                             under Form SE and the following 1933
  the Board of Directors of Dean Witter     Act File Numbers: 33-17085,
  Reynolds Inc.:                            333-13039 and 333-47553
</TABLE>

     RICHARD M. DeMARTINI
     RAYMOND J. DROP
     JAMES F. HIGGINS
     MITCHELL M. MERIN
     STEPHEN R. MILLER
     PHILIP J. PURCELL
     THOMAS C. SCHNEIDER
     By MICHAEL D. BROWNE
       (As authorized signatory for
       Dean Witter Reynolds Inc.
       and Attorney-in-fact for the persons listed above)

                                      R-7



                                                                     EXHIBIT 4.1

                               STANDARD & POOR'S
                    A DIVISION OF THE McGRAW-HILL COMPANIES
                                  J. J. KENNY
                                  65 BROADWAY
                           NEW YORK, N.Y. 10006-2551
                            TELEPHONE (212) 770-4422
                                FAX 212/797-8681

                                                      January 28, 2000

Frank A. Ciccotto, Jr.
Vice President
Tax-Exempt Evaluations

Merrill Lynch, Pierce, Fenner & Smith
Incorporated
Defined Asset Funds
P.O. Box 9051
Princeton, New Jersey 08543-9051

The Chase Manhattan Bank
4 New York Plaza, 6th Floor
New York, New York 10004

RE: MUNICIPAL INVESTMENT TRUST FUND,
    MONTHLY PAYMENT SERIES--533, DEFINED ASSET FUNDS

Gentlemen:

    We have examined the post-effective Amendment to the Registration Statement
File No. 33-50121 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
Amendment 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
above-referenced Amendment to the Registration Statement for the respective
bonds comprising the trust portfolio are the ratings currently indicated in our
KENNYBASE database.

    You are hereby authorized to file copies of this letter with the Securities
and Exchange Commission.

                                                      Sincerely,
                                                      FRANK A. CICCOTTO
                                                      Vice President



                                                                     Exhibit 5.1
                       CONSENT OF INDEPENDENT ACCOUNTANTS

The Sponsors and Trustee of
Municipal Investment Trust Fund--Monthly Payment Series--533, Defined Asset
Funds

We consent to the use in this Post-Effective Amendment No. 6 to Registration
Statement No. 33-50121 of our opinion dated January 17, 2000 appearing in the
Prospectus, which is part of such Registration Statement, and to the reference
to us under the heading "Auditors" in such Prospectus.

DELOITTE & TOUCHE LLP
New York, N.Y.
January 28, 2000



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