DEFINED ASSET FUNDS EQUITY INCOME FD INDEX SER S&P 500 TR 2
485BPOS, 2000-04-12
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      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON APRIL 12, 2000

                                                       REGISTRATION NO. 33-44844
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION

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

                         POST-EFFECTIVE AMENDMENT NO. 9
                                       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:

                             DEFINED ASSET FUNDS--
                              EQUITY INVESTOR FUND
                                  INDEX SERIES
                                S&P 500 TRUST 2
                                S&P MIDCAP TRUST
                            (UNIT INVESTMENT TRUSTS)

B. NAMES OF DEPOSITORS:

                   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:

<TABLE>
<S>                        <C>                        <C>
  TERESA KONCICK, ESQ.         ROBERT E. HOLLEY           MICHAEL KOCHMANN
      P.O. BOX 9051            1200 HARBOR BLVD.          388 GREENWICH ST.
PRINCETON, NJ 08543-9051      WEEHAWKEN, NJ 07087        NEW YORK, NY 10013

                                  COPIES TO:             DOUGLAS LOWE, ESQ.
                            PIERRE DE SAINT PHALLE,   DEAN WITTER REYNOLDS INC.
   LEE B. SPENCER, JR.               ESQ.                  TWO WORLD TRADE
   ONE NEW YORK PLAZA        450 LEXINGTON AVENUE        CENTER--59TH FLOOR
   NEW YORK, NY 10292         NEW YORK, NY 10017         NEW YORK, NY 10048
</TABLE>

The issuer has registered an indefinite number of Units under the Securities Act
of 1933 pursuant to Rule 24f-2 and will file the Rule 24f-2 Notice for the most
recent fiscal year in March, 2000

Check box if it is proposed that this filing will become effective on April 20,
2000 pursuant to paragraph (b) of Rule 485.  /X/

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                             DEFINED ASSET FUNDS--REGISTERED TRADEMARK--
                             ------------------------------
                             ----------------------

                           EQUITY INVESTOR FUND
                           INDEX SERIES
                           S&P 500 TRUST 2
                           S&P MIDCAP TRUST
                           (A UNIT INVESTMENT TRUST)
                           -  MONTHLY INCOME
                           -  DIVERSIFICATION
                           -  REINVESTMENT OPTION

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 April 20, 2000.

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

Defined Asset Funds--Registered Trademark--
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 or 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, risk tolerance 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 ON THIS PROSPECTUS IS AS OF THE EVALUATION DATE,
DECEMBER 31, 1999.

<TABLE>
<S>                                    <C>
CONTENTS
                                       PAGE
                                       ---
S&P 500 Trust 2 Risk/Return Summary..    3
S&P 500 MidCap Trust
  Risk/Return Summary................    5
What You Can Expect From Your
  Investment.........................    7
  Income.............................    7
  Records and Reports................    7
The Risks You Face...................    7
  Litigation and Legislation Risks...    7
Selling Units........................    7
  Sponsors' Secondary Market.........    7
  Selling Units to the Trustee.......    8
How The Fund Works...................    8
  Pricing............................    8
  Evaluations........................    8
  Income.............................    8
  Expenses...........................    9
  Portfolio Changes..................    9
  Fund Termination...................    9
  Certificates.......................   10
  Trust Indenture....................   10
  Legal Opinion......................   11
  Auditors...........................   11
  Sponsors...........................   11
  Trustee............................   11
  Underwriters' and Sponsors'
    Profits..........................   11
  Public Distribution................   12
  Code of Ethics.....................   12
  Year 2000 Issues...................   12
Taxes................................   12
Supplemental Information.............   13
Financial Statements.................  D-1
</TABLE>

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

S&P 500 TRUST 2 RISK/RETURN SUMMARY

<TABLE>
<C>  <S>
 1.  WHAT IS THE PORTFOLIO'S OBJECTIVE?

  -  The objective of this Defined Fund is
     designed to produce investment results
     corresponding to the performance of the
     Standard & Poor's 500 Stock Price
     Composite Index.
 2.  WHAT IS THE FUND'S INVESTMENT STRATEGY?

  -  The Portfolio contains 500 common stocks
     structured to mirror, as closely as
     possible, the total return of the S&P 500
     Index.
</TABLE>

<TABLE>
<S>    <C>
    -- With a single, convenient purchase, you
       can participate in the total return
       performance of an index broadly
       representing the market. This
       diversification reduces the risk of
       selecting individual stocks or market
       sectors.
</TABLE>

<TABLE>
<CAPTION>
  -  The Fund plans to hold the stocks in the
     Portfolio for approximately 17 years. The
     Fund will terminate by February 28, 2017.
<C>  <S>
 3.  WHAT ARE THE SIGNIFICANT RISKS?

     YOU CAN LOSE MONEY BY INVESTING IN THE
     FUND. THIS CAN HAPPEN FOR VARIOUS
     REASONS, INCLUDING:

  -  Stock prices can be volatile.

  -  Dividend rates on the stocks or share
     prices may decline during the life of the
     Fund.

  -  The Fund may continue to hold the stocks
     originally selected even though their
     market value or yield may have changed.
</TABLE>

<TABLE>
<C>  <S>
 4.  IS THIS FUND APPROPRIATE FOR YOU?

     Yes, if you want current monthly income.
     You will benefit from a professionally
     selected and supervised portfolio whose
     risk is reduced by investing in equity
     securities of many different issuers.
     The Fund is NOT appropriate for you if
     you are unwilling to take the risk
     involved with an equity investment.
</TABLE>

<TABLE>
<C>  <S>
 5.  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.
</TABLE>

<TABLE>
                                                   $0.77
     Trustee's Fee
                                                   $0.65
     Portfolio Supervision,
     Bookkeeping and
     Administrative Fees
     (including updating
     expenses)
<CAPTION>
     ESTIMATED ANNUAL OPERATING EXPENSES
                                                  AMOUNT
                                              PER 1,000 UNITS
                                              ---------------
<C>  <S>                                      <C>
                                                   $0.98
     Other Operating Expenses
                                                   -----
                                                   $2.40
     TOTAL
</TABLE>

<TABLE>
<C>  <S>
     The Sponsors historically paid updating
     expenses.

     INVESTOR FEES

     You will pay an up-front sales fee of
     approximately 2.25%. The fee will be reduced
     for quantity purchases, as follows:
</TABLE>

<TABLE>
<CAPTION>
                               YOUR MAXIMUM
                                SALES FEE
          IF YOU INVEST:         WILL BE:
          --------------       ------------
<C>  <S>                       <C>
     Less than $25,000             2.25%
     $25,000 to $49,999            2.00%
     $50,000 to $74,999            1.75%
     $75,000 to $99,999            1.50%
     $100,000-$249,999             1.25%
     $250,000-$999,999             1.00%
     $1,000,000-$4,999,999         0.75%
     $5,000,000-$14,999,999        0.50%
     $15,000,000 or more           0.25%
</TABLE>

<TABLE>
<C>  <S>
 6.  IS THE FUND MANAGED?
     Unlike a mutual fund, the Fund is not
     managed. However, stocks may be purchased
     or sold to reflect changes in the Index.
     The Sponsors monitor the portfolio and
     may instruct the Trustee to sell
     securities under certain limited
     circumstances.
</TABLE>

                                       3
<PAGE>
- --------------------------------------------------------------------------------

S&P 500 TRUST 2 RISK/RETURN SUMMARY (CONTINUED)

<TABLE>
<C>  <S>
 7.  HOW DO I BUY UNITS?

     The minimum investment is $250.

     You can buy units from the Sponsors.

     UNIT PRICE PER 1,000 UNITS      $2,990.44
     (as of December 31, 1999)

     Unit price is based on the net asset
     value of the Fund plus the up-front sales
     fee.
     The Portfolio stocks are valued by the
     Trustee on the basis of their closing
     prices at 4:00 p.m. Eastern time every
     business day. Unit price changes every
     day with changes in the prices of the
     stocks.

 8.  HOW DO I SELL UNITS?

     You may sell your units at any time to
     the Sponsors or the Trustee for the net
     asset value determined at the close of
     business on the date of sale.

 9.  HOW ARE DISTRIBUTIONS MADE AND TAXED?

     The Fund pays monthly distributions of
     any dividend income, net of expenses, on
     the 25th of each month, if you own units
     on the 10th of that month. Distributions
     of ordinary income will be dividends for
     federal income tax purposes and may be
     eligible for the dividends-received
     deduction for corporations. Distributions
     to foreign investors will generally be
     subject to withholding taxes.

10.  WHAT OTHER SERVICES ARE AVAILABLE?

     REINVESTMENT
     You may choose to reinvest your
     distributions into additional units of
     the Fund. Unless you choose reinvestment,
     you will receive your income
     distributions in cash.

     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 designated
     exchanges.
</TABLE>

                                       4
<PAGE>
- --------------------------------------------------------------------------------

S&P 500 MIDCAP TRUST RISK/RETURN SUMMARY

<TABLE>
<C>  <S>
 1.  WHAT IS THE PORTFOLIO'S OBJECTIVE?

  -  The objective of this Defined Fund is
     designed to produce investment results
     corresponding to the performance of the
     Standard & Poor's MidCap 400 Stock Price
     Composite Index.

 2.  WHAT IS THE FUND'S INVESTMENT STRATEGY?

  -  The Portfolio contains 400 common stocks
     structured to mirror, as closely as
     possible, the total return of the S&P
     MidCap 400 Index.
</TABLE>

<TABLE>
<S>    <C>
    -- With a single, convenient purchase, you
       can participate in the total return
       performance of an index broadly
       representing the market. This
       diversification reduces the risk of
       selecting individual stocks or market
       sectors.
</TABLE>

<TABLE>
<CAPTION>
  -  The Fund plans to hold the stocks in the
     Portfolio for approximately 17 years. The
     Fund will terminate by February 28, 2017.
<C>  <S>
 3.  WHAT ARE THE SIGNIFICANT RISKS?
     YOU CAN LOSE MONEY BY INVESTING IN THE
     FUND. THIS CAN HAPPEN FOR VARIOUS
     REASONS, INCLUDING:

  -  Stock prices can be volatile.

  -  Dividend rates on the stocks or share
     prices may decline during the life of the
     Fund.

  -  The Fund may continue to hold the stocks
     originally selected even though their
     market value or yield may have changed.
</TABLE>

<TABLE>
<C>  <S>
 4.  IS THIS FUND APPROPRIATE FOR YOU?

     Yes, if you want current monthly income.
     You will benefit from a professionally
     selected and supervised portfolio whose
     risk is reduced by investing in equity
     securities of many different issuers.
     The Fund is NOT appropriate for you if
     you are unwilling to take the risk
     involved with an equity investment.
</TABLE>

<TABLE>
<C>  <S>
 5.  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.
</TABLE>

<TABLE>
                                                   $0.81
     Trustee's Fee
                                                   $0.65
     Portfolio Supervision,
     Bookkeeping and
     Administrative Fees
     (including updating
     expenses)
<CAPTION>
     ESTIMATED ANNUAL OPERATING EXPENSES
                                                  AMOUNT
                                              PER 1,000 UNITS
                                              ---------------
<C>  <S>                                      <C>
                                                   $0.82
     Other Operating Expenses
                                                   -----
                                                   $2.28
     TOTAL
</TABLE>

<TABLE>
<C>  <S>
     The Sponsors historically paid updating
     expenses.

     INVESTOR FEES

     You will pay an up-front sales fee of
     approximately 2.25%. The fee will be reduced
     for quantity purchases, as follows:
</TABLE>

<TABLE>
<CAPTION>
                               YOUR MAXIMUM
                                SALES FEE
          IF YOU INVEST:         WILL BE:
          --------------       ------------
<C>  <S>                       <C>
     Less than $25,000             2.25%
     $25,000 to $49,999            2.00%
     $50,000 to $74,999            1.75%
     $75,000 to $99,999            1.50%
     $100,000-$249,999             1.25%
     $250,000-$999,999             1.00%
     $1,000,000-$4,999,999         0.75%
     $5,000,000-$14,999,999        0.50%
     $15,000,000 or more           0.25%
</TABLE>

<TABLE>
<C>  <S>
 6.  IS THE FUND MANAGED?
     Unlike a mutual fund, the Fund is not
     managed. However, stocks may be purchased
     or sold to reflect changes in the Index.
     The Sponsors monitor the portfolio and
     may instruct the Trustee to sell
     securities under certain limited
     circumstances.
</TABLE>

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

S&P MIDCAP TRUST RISK/RETURN SUMMARY (CONTINUED)

<TABLE>
<C>  <S>
 7.  HOW DO I BUY UNITS?

     The minimum investment is $250.

     You can buy units from the Sponsors.

     UNIT PRICE PER 1,000 UNITS      $1,807.29
     (as of December 31, 1999)

     Unit price is based on the net asset
     value of the Fund plus the up-front sales
     fee.
     The Portfolio stocks are valued by the
     Trustee on the basis of their closing
     prices at 4:00 p.m. Eastern time every
     business day. Unit price changes every
     day with changes in the prices of the
     stocks.

 8.  HOW DO I SELL UNITS?

     You may sell your units at any time to
     the Sponsors or the Trustee for the net
     asset value determined at the close of
     business on the date of sale.

 9.  HOW ARE DISTRIBUTIONS MADE AND TAXED?

     The Fund pays monthly distributions of
     any dividend income, net of expenses, on
     the 25th of each month, if you own units
     on the 10th of that month. Distributions
     of ordinary income will be dividends for
     federal income tax purposes and may be
     eligible for the dividends-received
     deduction for corporations. Distributions
     to foreign investors will generally be
     subject to withholding taxes.

10.  WHAT OTHER SERVICES ARE AVAILABLE?

     REINVESTMENT
     You may choose to reinvest your
     distributions into additional units of
     the Fund. Unless you choose reinvestment,
     you will receive your income
     distributions in cash.

     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 designated
     exchanges.
</TABLE>

                                       6
<PAGE>
WHAT YOU CAN EXPECT FROM YOUR INVESTMENT

INCOME

Because the Fund generally pays dividends as they are received, individual
income payments will fluctuate based upon the amount of dividends declared and
paid by each issuer. Other reasons your income may vary are:
  - changes to the Portfolio because of sales of securities;
  - changes in the Fund's expenses; and
  - the amount of dividends declared and paid.

There can be no assurance that any dividends will be declared or paid.

RECORDS AND REPORTS

You will receive:
- - a notice from the Trustee if new equity securities are deposited in exchange
  or substitution for equity securities originally deposited;
- - annual reports on Fund activity; and
- - annual tax information. THIS WILL ALSO BE SENT TO THE IRS. YOU MUST REPORT THE
  AMOUNT OF INCOME RECEIVED DURING THE YEAR. PLEASE CONTACT YOUR TAX ADVISOR IN
  THIS REGARD.

You may inspect records of Portfolio transactions at the Trustee's office during
regular business hours.

THE RISKS YOU FACE

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 Fund by:
  - reducing the dividends-received deduction or
  - increasing the corporate tax rate resulting in less money available for
    dividend payments.

SELLING UNITS

You can sell your units at any time for a price based on their net asset value.
Your net asset value is calculated each business day by:
  - ADDING the value of the Portfolio securities, 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
less any remaining deferred sales fee and the cost of liquidating securities to
meet the redemption. We may resell the units to other buyers or to the Trustee.

We have maintained a secondary market continuously for more than 25 years, but
we could discontinue it without prior notice for any business reason.

                                       7
<PAGE>
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 contacting your broker, dealer or financial
institution that holds your units in street name. 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 will sell your units in the over-the-counter market if it
believes it can obtain a higher price. In that case, you will receive the net
proceeds of the sale.

If the Fund does not have cash available to pay you for the units you are
selling we will select securities to be sold. These sales could be made at times
when the securities would not otherwise be sold and may result in your receiving
less than you paid for your unit 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
    securities not reasonably practicable; and
  - for any other period permitted by SEC order.

HOW THE FUND WORKS

PRICING

Units are charged an initial sales fee.

EVALUATIONS

The Trustee values the securities on each business day (i.e., any day other than
Saturdays, Sundays and the following holidays as observed by the New York Stock
Exchange: New Year's Day, Martin Luther King, Jr. Day, Presidents' Day, Good
Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas).
If the securities are listed on a national securities exchange or the Nasdaq
National Market, evaluations are generally based on closing sales prices on that
exchange or that system or, if closing sales prices are not available, at the
mean between the closing bid and offer prices.

INCOME
- - The annual income per unit, after deducting estimated annual Fund expenses per
  unit, will depend primarily upon the amount of dividends declared and paid by
  the issuers of the securities and changes in the expenses of the Fund and, to
  a lesser degree, upon the level of sales of securities. There is no assurance
  that dividends on the securities will continue at their current levels or be
  declared at all.

                                       8
<PAGE>
- - Each unit receives an equal share of monthly distributions of dividend income
  net of estimated expenses. Because dividends on the securities are not
  received at a constant rate throughout the year, any distribution may be more
  or less than the amount then credited to the Income Account. The Trustee
  credits dividends received to an Income Account and other receipts to a
  Capital Account. The Trustee may establish a reserve account by withdrawing
  from the these accounts amounts it considers appropriate to pay any material
  liability. These accounts do not bear interest.
- - Subject to the reinvestment plan, your monthly income distribution will be
  substantially equal to 1/12 of your share of the estimated annual income, net
  of estimated expenses.

EXPENSES

The Trustee is paid a fee monthly. It also benefits when it holds cash for the
Fund in non-interest bearing accounts. The Trustee may also receive additional
amounts:
  - 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 70 CENTS per 1,000 units 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 Fund's registration statement yearly are now chargeable to the
Fund. 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. Certain of these expenses were previously paid for
by the Sponsors.

The Trustee's and Sponsors' 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 securities if cash is not available.

PORTFOLIO CHANGES

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 may affect the
composition of the portfolio.

We decide whether 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; and
  - cost of maintaining a current prospectus.

FUND TERMINATION

When the Fund is about to terminate you will receive a notice, and you will be
unable

                                       9
<PAGE>
to sell your units after that time. Unless you choose to receive an in-kind
distribution of securities, we will sell any remaining securities, and you will
receive your final distribution in cash.

You will pay your share of the expenses associated with termination, including
brokerage costs in selling securities. 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 deliverying 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 and the Trustee, 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
  - 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 Trustee may
resign or be removed by the Sponsors without the consent of investors. The
resignation or removal of the Trustee 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 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

                                       10
<PAGE>
  - 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 and the Sponsors.

LEGAL OPINION

Davis Polk & Wardwell, 450 Lexington Avenue, New York, New York 10017, as
special counsel for the Sponsor, 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:
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
PRUDENTIAL SECURITIES INCORPORATED (an
indirect wholly-owned subsidiary of the
Prudential Insurance Company of America)
One New York Plaza
New York, NY 10292

DEAN WITTER REYNOLDS INC. (a principal operating subsidiary of Morgan Stanley
Dean Witter & Co.)
Two World Trade Center--59th Floor,
New York, NY 10048
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 Trustee for the S&P500 Trust 2 is The Chase Manhattan Bank, Unit Investment
Trust Department, 4 New York Plaza--6th Floor, New York, New York 10268. The
Trustee for the S&P MidCap Trust is The Bank of New York, 101 Barclay
Street--17W, New York, New York 10268. Each Trustee is supervised by the Federal
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. Any cash made available
by you to the Sponsors before the settlement date for your units may be used in
the Sponsors' businesses to the extent permitted by federal law and may benefit
the Sponsors.

                                       11
<PAGE>
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

The Fund and the Agent for the Sponsors have each adopted a code of ethics
requiring reporting of personal securities transactions by its employees with
access to information on Fund transactions. Subject to certain conditions, the
codes permit employees to invest in Fund securities for their own accounts. The
codes are designed to prevent fraud, deception and misconduct against the Fund
and to provide reasonable standards of conduct. These codes are on file with the
Commission and you may obtain a copy by contacting the Commission at the address
listed on the back cover of this prospectus.

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"). To date we are not aware of any major operational difficulties
resulting from the computer system changes necessary to prepare for the Year
2000. However, there can be no assurance that the Year 2000 Problem will not
adversely affect the issuers of the bonds contained in a Portfolio. We cannot
predict whether any impact will be material to the Fund as a whole.

TAXES

The following summarizes the material income tax consequences of holding Units.
It assumes that you are not a dealer, financial institution, insurance company
or other investor with special circumstances. You should consult your own tax
adviser about your particular circumstances.

GENERAL TREATMENT OF THE FUND AND YOUR INVESTMENT

The Fund intends to quality for special tax treatment as a regulated investment
company so that it will not be subject to federal income tax on the portion of
its taxable income that it distributes to investors in a timely manner.

DISTRIBUTIONS

Distributions to you of the Fund's dividend income and of the Fund's gains from
Securities it has held for one year or less will generally be taxed to you as
ordinary income, to the extent of the Fund's taxable income not attributable to
the Fund's net capital gain. Distributions to you in excess of the Fund's
taxable income will be treated as a return of capital and will reduce your basis
in your Units. To the extent such distributions exceed your basis, they will be
treated as gain from the sale of your Units.

                                       12
<PAGE>
Distributions to you that are treated as ordinary income will constitute
dividends for federal income tax purposes. Corporate investors may be eligible
for the 70% dividends-received deduction with respect to these distributions.
You should consult your tax adviser.

Distributions to you of the Fund's net capital gain will generally be taxable to
you as long-term capital gain, regardless of how long you have held your Units.

INCOME OR LOSS UPON DISPOSITION

You will generally recognize capital gain or loss when you dispose of your
Units. If you receive Securities upon redemption of your Units, you will
generally recognize capital gain or loss equal to the difference between your
basis in your Units and the fair market value of the Securities received in
redemption.

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 or loss will generally be long-term if you have held your
investment which produces the gain or loss for more than one year and short-term
otherwise. Because the deductibility of capital losses is subject to
limitations, you may not be able to deduct all of your capital losses. You
should consult your tax adviser in this regard.

YOUR BASIS IN THE SECURITIES

Your aggregate basis in the Units will generally be equal to the cost of your
Units, including the initial sales charge. You should not increase your basis in
your Units by deferred sales charges or organizational expenses.

FOREIGN INVESTORS

If you are a foreign investor and you are not engaged in a U.S. trade or
business, you will generally be subject to 30% withholding tax (or a lower
applicable treaty rate) on your share of dividends received by the Portfolio.
You should consult your tax adviser about the possible application of federal,
state and local, and foreign taxes.

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
and general information about the structure and operation of the Fund. The
supplemental information is also available from the SEC.

                                       13
<PAGE>

 DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
 INDEX SERIES, S&P MIDCAP TRUST

 REPORT OF INDEPENDENT ACCOUNTANTS

 The Sponsors, Trustee and Holders of Defined Asset Funds - Equity Investor Fund
   Index Series, S&P Midcap Trust:

 We have audited the accompanying statement of condition of Defined Asset Funds
 - Equity Investor Fund Index Series, S&P Midcap Trust, including the portfolio,
 as of December 31, 1999 and the related statements of operations and of changes
 in net assets for the years ended December 31, 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 December 31, 1999, as shown in such portfolio, were confirmed to us by
 The Bank of New York, 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 Defined Asset Funds - Equity
 Investor Fund Index Series, S&P Midcap Trust at December 31, 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.
 March 28, 2000


                                      D - 1
<PAGE>

 DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
 INDEX SERIES, S&P MIDCAP TRUST

 STATEMENT OF CONDITION
 AS OF DECEMBER 31, 1999

<TABLE>
<S>                                                 <C>            <C>
 TRUST PROPERTY:
   Investment in marketable securities - at value
     (cost $136,373,127) (Note 1)..................                $153,741,098
   Dividends receivable............................                      95,623
   Receivable from securties sold..................                     799,192
                                                                 ---------------

             Total trust property..................                 154,635,913

LESS LIABILITIES:
  Advance from trustee............................. $  3,929,927
  Accrued expenses.................................       79,358
  Payable for securties purchased..................      357,620      4,366,905
                                                    ------------ --------------

 NET ASSETS, REPRESENTED BY:
     94,479,164 units of fractional undivided
     interest outstanding (Note 3).................  150,210,689
   Undistributed net investment income.............       58,319
                                                    ------------
                                                                    $150,269,008
                                                                 ==============

 UNIT VALUE ($150,269,008/94,479,164 units)........                   $1.59050
                                                                 ==============

</TABLE>

                       See Notes to Financial Statements.


                                      D - 2
<PAGE>

 DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
 INDEX SERIES, S&P MIDCAP TRUST

 STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                    .........Years Ended December 31,.........
                                                          1999          1998          1997
                                                    ------------------------------------------
<S>                                                 <C>            <C>           <C>
 INVESTMENT INCOME:
   Dividend income.................................   $ 1,667,966  $ 1,301,738   $ 1,137,334
   Trustee's fees and expenses.....................      (129,130)    (128,720)     (128,718)
   Sponsors' fees .................................       (53,067)     (24,158)       (2,449)
                                                    ------------------------------------------

   Net investment income...........................     1,485,769    1,148,860     1,006,167
                                                    ------------------------------------------

 REALIZED AND UNREALIZED GAIN (LOSS) ON
   INVESTMENTS:
   Realized gain on securities sold or
     redeemed......................................    19,529,579   26,528,231     8,040,846
   Unrealized appreciation (depreciation)
     of investments................................      (628,853)  (9,055,120)   13,838,901
                                                     ------------------------------------------

   Net realized and unrealized gain on
     investments...................................    18,900,726   17,473,111    21,879,747
                                                    ------------------------------------------

 NET INCREASE IN NET ASSETS RESULTING
   FROM OPERATIONS.................................   $20,386,495  $18,621,971   $22,885,914
                                                    ==========================================
</TABLE>

                       See Notes to Financial Statements.


                                      D - 3
<PAGE>

 DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
 INDEX SERIES, S&P MIDCAP TRUST

 STATEMENTS OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>

                                                    .........Years Ended December 31,.........
                                                          1999          1998          1997
                                                    ------------------------------------------
<S>                                                <C>            <C>            <C>
OPERATIONS:
   Net investment income...........................  $  1,485,769 $  1,148,860   $ 1,006,167
   Realized gain on securities sold
      or redeemed..................................    19,529,579   26,528,231     8,040,846
   Unrealized appreciation (depreciation)
      of investments...............................      (628,853)  (9,055,120)   13,838,901
                                                    ------------------------------------------

   Net increase in net assets resulting
      from operations..............................    20,386,495   18,621,971    22,885,914
                                                    ------------------------------------------

 DISTRIBUTIONS TO HOLDERS (Note 2):
   Income..........................................    (1,523,024)  (1,159,944)     (946,032)
   Principal.......................................   (27,778,501) (17,276,624)   (7,083,369)
                                                    ------------------------------------------

   Total distributions.............................   (29,301,525) (18,436,568)   (8,029,401)
                                                    ------------------------------------------

 CAPITAL SHARE TRANSACTIONS:
   Issuance of 25,550,703, 19,617,727 and 8,266,165
     additional units, respectively ...............    40,941,769   34,580,318    13,613,877
   Redemptions of 2,738,414, 3,694,169 and
     2,071,441 units, respectively ................    (4,555,877)  (6,109,494)   (3,299,904)
                                                    ------------------------------------------

   Net capital share transactions..................    36,385,892   28,470,824    10,313,973
                                                    ------------------------------------------

 NET INCREASE IN NET ASSETS........................    27,470,862   28,656,227    25,170,486

 NET ASSETS AT BEGINNING OF YEAR...................   122,798,146   94,141,919    68,971,433
                                                    ------------------------------------------

 NET ASSETS AT END OF YEAR.........................  $150,269,008 $122,798,146   $94,141,919
                                                    ==========================================

 PER UNIT:
   Income distributions during year................       .01828        .01856        .01796
                                                    ==========================================
   Principal distributions during year.............       .32793        .26442        .12801
                                                    ==========================================
   Net asset value at end of year..................       1.59050      1.71346       1.68885
                                                    ==========================================

 TRUST UNITS OUTSTANDING AT END OF YEAR............    94,479,164   71,666,875    55,743,317
                                                    ==========================================

</TABLE>

                       See Notes to Financial Statements.


                                      D - 4
<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

 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 market value; for securities listed on a
         national securities exchange, value is based on the closing price on
         such exchange and for securities not so listed, value is based on the
         current bid price on the over-the-counter market. Realized gains or
         losses on sales of securities are determined using the first-in,
         first-out cost method.

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

     (c) Dividend income is recorded on the ex-dividend date.

  2. DISTRIBUTIONS

     A distribution of net investment income is made to Holders on the
     twenty-fifth day of each month. Receipts other than dividends, after
     deductions for redemptions and applicable expenses, are also distributed
     periodically.

  3. NET CAPITAL

<TABLE>
<S>                                                            <C>
     Cost of 94,479,164 units at Date of Deposit................. $135,599,609
     Less sales charge...........................................    3,051,263
                                                                ---------------
     Net amount applicable to Holders............................  132,548,346
     Redemptions of units - net cost of 10,981,253 units
       redeemed less redemption amounts..........................   (3,218,130)
     Realized gain on securities sold or redeemed................   63,942,215
     Principal distributions.....................................  (60,429,713)
     Net unrealized appreciation of investments..................   17,367,971
                                                                ---------------

     Net capital applicable to Holders........................... $150,210,689
                                                                ===============

</TABLE>


                                      D - 5
<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

NOTES TO FINANCIAL STATEMENTS

  4. INCOME TAXES

     As of December 31, 1999, net unrealized appreciation of investments, based
     on cost for Federal income tax purposes, aggregated $17,367,971, of which
     $36,033,391 related to appreciated securities and $18,665,420 related to
     depreciated securities. The cost of investment securities for Federal
     income tax purposes was $136,373,127 at December 31, 1999.


                                      D - 6
<PAGE>

  DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
  INDEX SERIES, S&P MIDCAP TRUST

  PORFOLIO
  AS OF DECEMBER 31, 1999

  <TABLE>
  <CAPTION>
                                                                      Percentage
  Port-                                                                of Total
  folio                                                                  Market
  No.     Common Stocks               Shares      Cost (1)      Value (1) Value
  ---     -------------              ------      --------      --------   -----
 <S>  <C>                             <C>      <C>           <C>           <C>
  1 Veritas Software                 43,200  $  1,488,223  $  6,183,000  4.02 %
  2 Siebel Sys. Inc.                 32,200       696,413     2,704,800  1.76 %
  3 Maxim Integrated Products        45,600       822,700     2,151,750  1.40 %
  4 Biogen Inc.                      25,100       799,456     2,120,950  1.38 %
  5 Intuit Inc.                      32,600       708,945     1,953,963  1.27 %
  6 Medimmune Inc.                   11,200       859,256     1,857,800  1.21 %
  7 Linear Technology Corporation    25,700       890,234     1,839,156  1.20 %
  8 Univision                        17,000     1,061,821     1,737,188  1.13 %
  9 Altera Corporation               33,300       713,447     1,650,431  1.07 %
 10 Harley Davidson Inc.             25,200       833,591     1,614,375  1.05 %
 11 Broadwing Inc.                   36,100       747,095     1,331,188  0.87 %
 12 Vitesse                          25,600       691,019     1,342,400  0.87 %
 13 Chiron Corporation               30,300       649,444     1,283,963  0.84 %
 14 Telephone & Data                 10,300       509,166     1,297,800  0.84 %
 15 Marshall & Ilsley Corporation    17,800       835,507     1,118,063  0.73 %
 16 Stryker Corporation              16,200       615,850     1,127,925  0.73 %
 17 Tiffany & Co.                    12,000       319,889     1,071,000  0.70 %
 18 E Trade Group Inc.               40,800     1,042,024     1,065,900  0.69 %
 19 JBL                              14,600       708,418     1,065,800  0.69 %
 20 Atmel Corporation                33,600       364,112       993,300  0.65 %
 21 Cintas Corporation               18,500       864,766       982,813  0.64 %
 22 Legato Systems                   14,200       492,206       977,138  0.64 %
 23 SCI Systems Inc.                 12,000       488,395       986,250  0.64 %
 24 Cadence Design Sys. Inc.         40,600       847,353       974,400  0.63 %
 25 Qlogic Corporation                6,100       508,384       975,238  0.63 %
 26 Sanmina Corporation               9,700       668,256       968,788  0.63 %
 27 Checkfree Holdings                9,100       452,085       950,950  0.62 %
 28 Comdisco Inc.                    25,544       338,603       951,514  0.62 %
 29 Symbol Technologies              14,787       354,828       939,899  0.61 %
 30 Millennium Pharmacies             7,400       554,300       902,800  0.59 %
 31 Conford EFS, Inc.                34,350       867,597       884,513  0.58 %
 32 Washington Post                   1,600       755,235       889,400  0.58 %
 33 Electronic Arts                  10,500       448,190       882,000  0.57 %
 34 Forest Laboratories Inc.         13,900       475,275       853,981  0.56 %
</TABLE>


                                      D - 7

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                 Shares      Cost (1)     Value (1)  Value
- ---     -------------                 ------      --------     --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
35  American Power Conversion Corp.  32,100  $    470,135  $    846,638  0.55 %
36  Hispanic Broadcasting             9,100       599,569       839,191  0.55 %
37  Zions Bancorp                    14,300       738,387       846,381  0.55 %
38  First Security Corporation       32,630       589,894       833,085  0.54 %
39  DST                              10,600       725,493       808,913  0.53 %
40  Novellus Systems Inc.             6,500       459,750       796,453  0.52 %
41  CVG                              25,500       509,326       784,125  0.51 %
42  Fiserv Inc.                      20,450       480,433       783,491  0.51 %
43  Synopsys Inc.                    11,800       565,567       787,650  0.51 %
44  Starbucks Coffee                 30,400       642,993       737,200  0.48 %
45  Noble Drilling Corporation       21,900       410,485       717,225  0.47 %
46  Rational Software Co.            14,600       511,569       717,225  0.47 %
47  Weatherford Intl. Inc.           18,021       654,606       719,714  0.47 %
48  Nabors Inds. Inc.                23,100       470,245       714,656  0.46 %
49  Westwood One, Inc.                9,200       449,695       699,200  0.45 %
50  Calpine Corporation              10,500       452,741       672,000  0.44 %
51  Charter One Financial Inc.       35,351       918,152       676,088  0.44 %
52  Montana Power Company            18,400       355,139       663,550  0.43 %
53  Genzyme Corporation              14,000       481,907       630,000  0.41 %
54  Park Pl Entmn. Corporation       50,900       651,895       636,250  0.41 %
55  AMBAC Financial Group            11,700       542,634       610,594  0.40 %
56  First Tennessee National Corp.   21,700       559,379       618,450  0.40 %
57  NCR Corporation                  16,100       586,718       609,788  0.40 %
58  Network Associates               23,250       935,668       620,484  0.40 %
59  Tyson Foods                      38,300       734,782       622,375  0.40 %
60  Cypress Semiconducter            18,200       258,706       589,225  0.38 %
61  Microchip Technology              8,500       249,068       581,719  0.38 %
62  Reliastar                        14,800       645,578       579,975  0.38 %
63  CDW Computer Centers              7,250       469,659       570,031  0.37 %
64  Health Management                42,250       638,888       565,094  0.37 %
65  Symantec Corporation              9,700       217,588       568,663  0.37 %
66  Jones Apparel Group              20,406       504,022       553,511  0.36 %
67  Visx Inc.                        10,700       683,088       553,725  0.36 %
68  Waters Corporation               10,400       635,016       551,200  0.36 %

</TABLE>


                                      D - 8

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                Shares      Cost (1)     Value (1)   Value
- ---     -------------                ------      --------      --------   -----
<S>  <C>                              <C>      <C>           <C>        <C>
69  American Standard                11,800  $    507,169   $   541,325  0.35 %
70  Mylan Labs                       21,550       524,487       542,791  0.35 %
71  Sepracor Inc.                     5,500       474,030       545,531  0.35 %
72  Ensco International              22,900       360,706       523,838  0.34 %
73  Keyspan Energy Corporation       22,350       693,972       518,241  0.34 %
74  Readers Digest Association       17,800       635,456       520,650  0.34 %
75  Allamerica Financial              9,000       516,373       500,625  0.33 %
76  New England Electric              9,900       423,691       512,325  0.33 %
77  Sterling Commerce Inc.           14,711       507,071       501,093  0.33 %
78  Sungard Data Systems Inc.        21,400       641,070       508,250  0.33 %
79  Allegheny Energy Inc.            18,400       556,399       495,650  0.32 %
80  B J Svcs. Co.                    11,800       265,666       493,388  0.32 %
81  Dollar Tree Stores               10,300       362,094       498,906  0.32 %
82  Edward A.G. Inc.                 15,387       429,533       493,346  0.32 %
83  Hannaford Bros. Co.               7,000       279,086       485,188  0.32 %
84  Hormel (Geo. A.) & Co.           12,100       385,429       491,563  0.32 %
85  Consolidated Paper Inc.          15,100       401,300       480,369  0.31 %
86  Devon Energy                     14,300       567,830       470,113  0.31 %
87  Family Dlr. Stores Inc.          28,800       398,959       469,800  0.31 %
88  Global Marine Inc.               29,100       367,708       483,788  0.31 %
89  Manpower Inc.                    12,700       388,263       477,838  0.31 %
90  Abercrombie & Fitch              17,200       486,051       459,025  0.30 %
91  Bowater Inc.                      8,600       378,288       467,088  0.30 %
92  DPL Inc.                         26,500       532,317       458,781  0.30 %
93  Potomac Electric Power Company   19,800       499,679       454,163  0.30 %
94  Scana Corporation                17,300       470,002       464,938  0.30 %
95  Unitrin Inc.                     12,100       478,250       455,263  0.30 %
96  BJ'S Club                        12,300       242,249       448,950  0.29 %
97  Integrated Device Tech.          15,200       209,163       440,800  0.29 %
98  International Speed               8,900       551,535       448,338  0.29 %
99  Ivax Corporation                 17,600       280,820       453,200  0.29 %
100 Northeast Utilities              21,900       411,635       450,319  0.29 %
101 Sterling Software                14,100       374,642       444,150  0.29 %
102 Viad Corporation                 15,800       354,179       440,425  0.29 %

</TABLE>

                                      D - 9

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
 INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                Shares      Cost (1)     Value (1)   Value
- ---     -------------                ------      --------      --------  -----
<S>  <C>                              <C>      <C>           <C>           <C>
103 Vishay Intertechnology           14,076  $    273,440   $   445,154  0.29 %
104 Avnet, Inc.                       7,000       351,051       423,500  0.28 %
105 Compass Bancshares               19,000       553,510       423,938  0.28 %
106 DQE                              12,600       485,595       436,275  0.28 %
107 Dial Corporation                 17,600       373,398       427,900  0.28 %
108 Greenpoint Finance               18,000       577,761       428,625  0.28 %
109 Murphy Oil Corporation            7,500       326,187       430,313  0.28 %
110 Robert Half International        15,000       543,489       428,438  0.28 %
111 Sybron International Corporation 17,300       404,505       427,094  0.28 %
112 Williams-Sonoma                   9,300       432,392       427,800  0.28 %
113 Express Scripts Inc.              6,400       321,782       409,600  0.27 %
114 National Commerce Bancorp        18,100       435,275       410,644  0.27 %
115 Quantum Corporation              27,500       432,738       415,938  0.27 %
116 SPX Corporation                   5,200       297,399       420,225  0.27 %
117 Smith International Inc.          8,200       285,073       407,438  0.27 %
118 Arrow Electronics Inc.           16,000       332,987       406,000  0.26 %
119 Chris Craft Industries Inc.       5,604       252,394       404,189  0.26 %
120 Energy East Corporation          19,100       381,124       397,519  0.26 %
121 Gilead Sciences Inc.              7,300       383,027       395,113  0.26 %
122 Illinova Corporation             11,700       309,387       406,575  0.26 %
123 Nstar                            10,000       419,262       405,000  0.26 %
124 Teco Energy                      21,600       528,302       400,950  0.26 %
125 ACS                               8,200       358,846       377,200  0.25 %
126 AH Bello Corp.                   19,800       401,959       377,438  0.25 %
127 Informix Corporation             33,600       391,285       384,300  0.25 %
128 Keane Inc.                       12,000       551,377       381,000  0.25 %
129 Kinder Morgan Inc.               18,750       522,829       378,516  0.25 %
130 Litton Industries Inc.            7,600       394,095       379,050  0.25 %
131 Minimed Inc.                      5,200       442,008       380,900  0.25 %
132 North Fork Bancor                21,750       519,041       380,625  0.25 %
133 Nova                             12,300       379,818       388,219  0.25 %
134 Pacificare Health Sys-B Inc.      7,256       532,852       384,568  0.25 %
135 Sonoco Products Co.              17,015       451,445       387,091  0.25 %
136 USG Corp.                         8,200       400,891       386,425  0.25 %

</TABLE>


                                     D - 10
<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                Shares      Cost (1)     Value (1)   Value
- ---     -------------                ------      --------      --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
137 Wisconsin Energy                 19,700  $    546,456   $   379,225  0.25 %
138 Associated Banc. Corporation     10,675       399,766       365,619  0.24 %
139 The Finova Group, Inc.           10,200       494,472       362,100  0.24 %
140 LG & E Energy                    21,600       545,480       376,650  0.24 %
141 Mercantile Bankshare Corporation 11,500       331,897       367,281  0.24 %
142 Nisource Inc.                    20,900       495,156       373,588  0.24 %
143 Premier Parks                    13,000       494,665       375,375  0.24 %
144 Saks Incorporated                24,160       739,572       375,990  0.24 %
145 Alliant Communications           13,100       410,558       360,250  0.23 %
146 American Eagle Outfit             7,800       350,213       351,000  0.23 %
147 First Virginia Banks Inc.         8,250       340,901       354,750  0.23 %
148 Harris Corporation               13,300       255,430       354,944  0.23 %
149 Lear Corporation                 11,200       538,634       358,400  0.23 %
150 McCormick & Co. Inc.             11,800       339,138       351,050  0.23 %
151 The PMI Group Inc.                7,400       274,553       361,213  0.23 %
152 Polycom Inc.                      5,500       339,475       350,281  0.23 %
153 Acxiom Corporation               14,300       281,495       343,200  0.22 %
154 Adtran, Inc.                      6,600       257,507       339,488  0.22 %
155 American Water Works             16,200       436,194       344,250  0.22 %
156 Firstmerit Corporation           15,000       398,625       345,000  0.22 %
157 Georgia Pacific Timber Group     13,800       329,606       339,825  0.22 %
158 Hillenbrand Industries Inc.      10,900       526,451       345,394  0.22 %
159 ICN Pharmacueticals              13,100       493,772       331,594  0.22 %
160 Legg Mason Inc.                   9,500       306,204       344,375  0.22 %
161 MCN Energy Group Inc.            14,300       320,939       339,625  0.22 %
162 Midamerican Energy Co.           10,000       323,469       336,875  0.22 %
163 Protective Life Corporation      10,800       393,500       343,575  0.22 %
164 Shaw Industries Inc.             22,300       390,633       344,256  0.22 %
165 TCF Financial Corporation        13,800       405,218       343,275  0.22 %
166 Tidewater Inc.                    9,300       307,295       334,800  0.22 %
167 AK Steel Holding Corporation     17,200       338,745       324,650  0.21 %
168 Martin Marietta Materials         7,800       337,889       319,800  0.21 %
169 Outback Steakhouse               12,550       291,658       325,516  0.21 %
170 RJ Reynolds Tobacco              18,300       580,966       322,538  0.21 %

</TABLE>


                                     D - 11

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                Shares      Cost (1)     Value (1)   Value
- ---     -------------                ------      --------      --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
171 Ultramar Diamond Shamrock Corp.  14,462  $    420,902   $   328,107  0.21 %
172 Whitman Corporation              23,500       412,841       315,781  0.21 %
173 IMC Global Inc.                  19,100       569,670       312,763  0.20 %
174 International Game Technology    15,000       313,078       304,688  0.20 %
175 Lincare Hldgs.                    9,000       318,250       312,188  0.20 %
176 Mandalay                         15,100       348,922       303,888  0.20 %
177 Miller Herman Inc.               13,300       234,394       305,900  0.20 %
178 National Fuel Gas Co.             6,500       269,613       302,250  0.20 %
179 Pentair Inc.                      8,000       283,526       308,000  0.20 %
180 Southdown Incorporated            6,000       352,588       309,750  0.20 %
181 Storage Technology               16,700       446,795       307,906  0.20 %
182 Sykes Enterprises                 7,100       194,356       311,513  0.20 %
183 Utilicorp United                 15,450       344,925       300,309  0.20 %
184 CCB Financial Corporation         6,800       348,606       296,225  0.19 %
185 Hubbell Inc. Class B             10,840       403,524       295,390  0.19 %
186 Old Republic International       21,050       482,118       286,806  0.19 %
187 Reynolds & Reynolds Company      12,900       225,901       290,250  0.19 %
188 Sotheby's Holdings Inc.           9,800       220,350       294,000  0.19 %
189 Astoria Financial Corporation     9,100       430,866       276,981  0.18 %
190 CNF Transportation Inc.           8,100       267,241       279,450  0.18 %
191 Diebold Inc.                     11,468       329,971       269,498  0.18 %
192 Dime Bancorp Inc.                18,500       454,303       279,813  0.18 %
193 Fastenal Company                  6,300       263,653       283,106  0.18 %
194 Gatx Corporation                  8,200       262,503       276,750  0.18 %
195 Hibernia Bancorp                 26,700       397,915       283,688  0.18 %
196 IBP Inc.                         15,400       326,792       277,200  0.18 %
197 Lubizol Corporation               9,100       271,600       280,963  0.18 %
198 Puget Sound Energy, Inc.         14,100       364,585       273,188  0.18 %
199 Ross Stores                      15,100       346,163       270,856  0.18 %
200 Solutia Inc.                     18,400       407,452       284,050  0.18 %
201 Sovereign Bancorp                36,600       503,087       272,784  0.18 %
202 U.S. Foodservice                 16,900       333,291       283,075  0.18 %
203 American Financial Group Hldg.    9,700       344,230       255,838  0.17 %
204 Apollo Group Inc.                12,900       381,217       258,806  0.17 %

</TABLE>


                                     D - 12

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                Shares      Cost (1)     Value (1)   Value
- ---     -------------                ------      --------      --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
205 Brinker Intl. Inc.               10,925  $    236,054   $   262,200  0.17 %
206 CK Witco                         19,879       447,136       265,882  0.17 %
207 Cambridge Tech. Partn.           10,100       215,306       265,125  0.17 %
208 Conectiv                         15,475       335,438       260,173  0.17 %
209 Dean Foods Co.                    6,500       258,513       258,375  0.17 %
210 Flowers Industries Inc.          16,750       284,557       266,953  0.17 %
211 Mohawk Industries Inc.           10,100       299,001       266,388  0.17 %
212 Provident Financial               7,300       316,569       261,888  0.17 %
213 Wilmington Trust                  5,400       259,792       260,550  0.17 %
214 A.C. Nielson Corporation          9,700       209,288       238,863  0.16 %
215 Barnes & Noble                   11,600       339,730       239,250  0.16 %
216 Beckman Instrs. Inc.              4,800       214,739       244,200  0.16 %
217 City National Corporation         7,600       193,531       250,325  0.16 %
218 Federal-Mogul Corporation        12,300       581,246       247,538  0.16 %
219 Harte-Hanks                      11,500       305,604       250,125  0.16 %
220 Ipalco Enterprises               14,300       271,382       243,994  0.16 %
221 Lyondell Petrochemical           19,600       418,883       249,900  0.16 %
222 OGE Energy Corporation           13,000       302,213       247,000  0.16 %
223 Pacific Century Financial Corp.  13,400       274,813       250,413  0.16 %
224 Payless Shoesource                5,200       260,423       244,400  0.16 %
225 Santa Fe Snyder                  30,800       264,949       246,400  0.16 %
226 Cabot Corporation                11,000       260,893       224,125  0.15 %
227 Callaway Golf Co.                12,700       246,641       224,631  0.15 %
228 Kansas City Power & Light Co.    10,300       276,296       227,244  0.15 %
229 Lee Enterprises Inc.              7,400       186,792       236,338  0.15 %
230 Media General Inc.                4,400       181,646       228,800  0.15 %
231 Modis Professional               16,000       414,696       228,000  0.15 %
232 Neiman Marcus Group               8,200       222,281       229,088  0.15 %
233 Sierra Pacific Resource          13,100       322,313       226,794  0.15 %
234 Tech Data Corporation             8,700       335,488       235,988  0.15 %
235 Borders Group, Inc.              13,000       373,611       208,813  0.14 %
236 Clayton Homes Inc.               23,313       275,424       214,188  0.14 %
237 Dentsply Intl. Inc.               8,800       206,721       207,900  0.14 %
238 Devry Inc.                       11,600       234,392       216,050  0.14 %

</TABLE>


                                     D - 13

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                Shares      Cost (1)     Value (1)   Value
- ---     -------------                ------      --------      --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
239 First Health Group                8,200  $    188,774   $   220,375  0.14 %
240 Harsco Corporation                6,700       221,032       212,725  0.14 %
241 Hon Inds. Inc.                   10,100       217,806       221,569  0.14 %
242 Houghton Mifflin Company          5,200       166,743       219,375  0.14 %
243 Interstate Bakeries              11,700       307,987       212,063  0.14 %
244 Lancaster Colony Corporation      6,665       196,021       220,778  0.14 %
245 Meritor Automotive               11,500       254,696       222,813  0.14 %
246 Minnesota Power And Light Co.    12,300       229,530       208,331  0.14 %
247 Ocean Energy Inc.                27,800       468,312       215,450  0.14 %
248 Rayonier Inc.                     4,600       184,498       222,238  0.14 %
249 Sensormatic Electronics Corp.    12,650       211,702       220,584  0.14 %
250 Washington Gas Light              7,700       184,022       211,750  0.14 %
251 BLYTH                             8,100       254,445       198,956  0.13 %
252 Cordant                           6,100       187,828       201,300  0.13 %
253 Foundation Health Systems Inc.   20,400       433,444       202,725  0.13 %
254 Gartner Group Inc.               14,700       317,531       203,044  0.13 %
255 Helmerich & Payne Inc.            9,000       191,520       196,313  0.13 %
256 Imation Corporation               6,100       132,209       204,731  0.13 %
257 Noble Affiliates Inc.             9,500       297,460       203,656  0.13 %
258 Questar Corporation              13,700       246,762       205,500  0.13 %
259 Suiza Foods Corporation           5,200       240,177       206,050  0.13 %
260 Teleflex                          6,300       204,717       197,269  0.13 %
261 Airborne Freight Corporation      8,100       207,291       178,200  0.12 %
262 Bergen Brunswig Corporation      22,350       403,538       185,784  0.12 %
263 Borg-Warner Automotive, Inc.      4,500       234,215       182,250  0.12 %
264 Carlisle Companies Inc.           5,000       177,297       180,000  0.12 %
265 Claires Stores Inc.               8,575       140,388       191,866  0.12 %
266 Donaldson Co. Inc.                7,700       128,053       185,281  0.12 %
267 Furniture Brands Intl.            8,200       214,208       180,400  0.12 %
268 Hanover Compressor Co.            4,800       157,488       181,200  0.12 %
269 Omnicare, Inc.                   15,200       438,518       182,400  0.12 %
270 RPM, Inc.                        17,975       257,128       183,120  0.12 %
271 Swift Transportation             10,700       236,475       188,588  0.12 %
272 Trigon Healthcare                 6,500       228,163       191,750  0.12 %

</TABLE>


                                     D - 14

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                Shares      Cost (1)     Value (1)   Value
- ---     -------------                ------      --------      --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
273 Trinity Industries                6,550  $    227,795   $   186,266  0.12 %
274 Valero Refining & Marketing Co.   9,300       206,087       184,838  0.12 %
275 Webster Financial                 7,600       201,413       179,075  0.12 %
276 York International                6,500       271,782       178,344  0.12 %
277 AGL Resources                     9,500       186,111       161,500  0.11 %
278 Alexander & Baldwin Inc.          7,200       176,070       164,250  0.11 %
279 Church & Dwight Co.               6,500       104,949       173,469  0.11 %
280 Comsat Corporation                8,800       236,328       174,900  0.11 %
281 Cytec Ind. Inc.                   7,000       239,886       161,875  0.11 %
282 Everest Reinsurance Holdings      7,800       278,111       174,038  0.11 %
283 HSB Group, Inc.                   4,850       188,343       163,991  0.11 %
284 Idacorp Inc. Hldg.                6,300       197,822       168,919  0.11 %
285 Kennametal Inc.                   5,000       160,324       168,125  0.11 %
286 Keysone Fin. Inc.                 8,100       253,947       170,606  0.11 %
287 Lands' End Inc.                   5,000       138,140       173,750  0.11 %
288 Oxford Health Plans              13,600       511,617       172,550  0.11 %
289 Scholastic Corporation            2,800       148,747       174,125  0.11 %
290 Universal Foods                   8,400       172,003       171,150  0.11 %
291 Westamerica Bancorp               6,300       223,675       176,006  0.11 %
292 Alaska Air Group, Inc.            4,400       186,716       154,550  0.10 %
293 Albemarle Corporation             7,800       153,277       149,663  0.10 %
294 Apria Healthcare Group            8,700       162,118       156,056  0.10 %
295 CMP Group Inc. Holding            5,400       107,981       148,838  0.10 %
296 Dexter Corporation                3,800       116,491       151,050  0.10 %
297 Dole Food Inc.                    9,300       322,897       151,125  0.10 %
298 Georgia Gulf Corporation          5,200       125,645       158,275  0.10 %
299 Hawaiian Electric Ind. Inc.       5,400       204,530       155,925  0.10 %
300 Investment Technology             5,200       199,239       149,500  0.10 %
301 Kelly Services Inc.               6,000       186,579       150,750  0.10 %
302 Newport News Shipbuilding         5,500       125,980       151,250  0.10 %
303 Ohio Casualty Corporation        10,000       178,838       160,625  0.10 %
304 Olin Corporation                  7,500       157,249       148,594  0.10 %
305 Olsten Corporation               13,550       228,169       153,284  0.10 %
306 Pioneer Natural Resources Co.    16,700       380,437       149,256  0.10 %

</TABLE>


                                     D - 15
<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                Shares      Cost (1)     Value (1)   Value
- ---     -------------                ------      --------      --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
307 Pittston Brink's Group            6,800  $    199,179   $   149,600  0.10 %
308 Policy Management Systems Corp.   5,900       207,236       150,819  0.10 %
309 Tecumseh Product                  3,300       174,288       155,719  0.10 %
310 Transaction Sys. Architects Inc.  5,400       212,988       151,200  0.10 %
311 Westpoint Stevens                 8,900       286,638       155,750  0.10 %
312 Agco Corporation                  9,900       218,580       133,031  0.09 %
313 Carter Wallace Inc.               7,500       157,763       134,531  0.09 %
314 Cirrus Logic Inc.                10,900       163,206       145,106  0.09 %
315 Horace Mann Educator              6,800       175,589       133,450  0.09 %
316 Jacobs Engr. Group Inc.           4,300       136,851       139,750  0.09 %
317 Kaydon Corporation                5,100       149,133       136,744  0.09 %
318 Mark IV Industries Inc.           7,805       143,847       138,051  0.09 %
319 Mentor Graphics Corporation      10,700       125,776       141,106  0.09 %
320 Minerals Technologies             3,500       148,137       140,219  0.09 %
321 Papa John's International         5,100       222,131       132,919  0.09 %
322 Pennzoil-Quaker State Co.        12,973       201,289       132,162  0.09 %
323 UCAR International                7,500       253,239       133,594  0.09 %
324 Arvin Industries Inc.             4,300       144,264       122,013  0.08 %
325 CLECO Corporation                 3,800       112,009       121,838  0.08 %
326 Federal Signal Corporation        7,700       175,612       123,681  0.08 %
327 Ferro Corporation                 5,875       130,415       129,250  0.08 %
328 Fuller (H.B.) Co.                 2,300       109,675       128,656  0.08 %
329 GTech Holdings Corporation        5,800       170,399       127,600  0.08 %
330 Longview Fibre Co.                8,600       133,166       122,550  0.08 %
331 Modine Manufacturing Co.          4,900       144,533       122,500  0.08 %
332 NCO Group Inc.                    4,200       202,925       126,525  0.08 %
333 Nordson Corporation               2,700       145,361       130,275  0.08 %
334 Ruddick Corporation               7,700       116,901       119,350  0.08 %
335 Steris Corporation               11,300       316,158       116,531  0.08 %
336 Superior Industries               4,400       124,200       117,975  0.08 %
337 Unifi, Inc.                       9,850       251,610       121,278  0.08 %
338 Universal Corporation             5,200       163,936       118,625  0.08 %
339 Wallace Computer                  7,000       170,038       116,375  0.08 %
340 Airgas Inc.                      11,700       195,641       111,150  0.07 %

</TABLE>


                                     D - 16

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                 Shares     Cost (1)     Value (1)   Value
- ---     -------------                 ------     --------      --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
341 Ametek                             5,400 $    104,533   $   102,938  0.07 %
342 Bob Evans Farms Inc.               6,600      132,498       101,888  0.07 %
343 Carpenter Technology               3,700      142,829       101,519  0.07 %
344 Covance Inc.                       9,700      220,245       104,881  0.07 %
345 Flowserve Corporation              6,250      158,582       106,250  0.07 %
346 Glatfelter Ph & Company            7,000      112,459       101,938  0.07 %
347 Micro Warehouse, Inc.              6,000      186,620       111,000  0.07 %
348 Officemax Inc.                    18,900      246,156       103,950  0.07 %
349 Pss World Medical Inc.            11,800      222,775       111,363  0.07 %
350 Precision Castparts Corporation    4,100      189,633       107,625  0.07 %
351 Public Service Co.                 6,800      121,604       110,500  0.07 %
352 Quorem Health Group               11,800      236,968       109,888  0.07 %
353 Sylvan Learning System             8,500      230,819       110,500  0.07 %
354 Varco International               10,900      105,883       111,044  0.07 %
355 Warnaco Group, Inc.                9,300      265,145       114,506  0.07 %
356 Wausau-Mosinee Paper Corporation   8,588      160,237       100,372  0.07 %
357 Wellman, Inc.                      5,700      108,695       106,163  0.07 %
358 Wisconsin Central Transport        8,500      206,594       114,219  0.07 %
359 Bandag Inc.                        3,700      161,624        92,500  0.06 %
360 Banta Corporation                  4,400      111,864        99,275  0.06 %
361 CBRL Group                         9,750      247,858        94,605  0.06 %
362 Chesapeake Corp.                   2,900       97,415        88,450  0.06 %
363 Hanna (M.A.) Co.                   8,200      129,841        89,688  0.06 %
364 Indiana Energy Inc.                4,933       97,562        87,561  0.06 %
365 Ogden Corporation                  8,200      180,470        97,888  0.06 %
366 Perrigo Co.                       12,200      201,424        97,600  0.06 %
367 Sequa Corporation                  1,700       90,971        91,694  0.06 %
368 JM Smucker Co.                     4,800      117,228        93,600  0.06 %
369 Standard Register Co.              4,600      131,476        89,125  0.06 %
370 Stewart Enterprises, Inc.         18,100      357,504        85,975  0.06 %
371 Total Rental Care                 13,500      368,319        90,281  0.06 %
372 Albany Intl. Corporation           5,113       96,960        79,256  0.05 %
373 Beverly Enterprises               17,100      175,593        74,813  0.05 %
374 Black Hills Inc.                   3,600       75,050        79,875  0.05 %

</TABLE>


                                     D - 17

<PAGE>

DEFINED ASSET FUNDS - EQUITY INVESTOR FUND
INDEX SERIES, S&P MIDCAP TRUST

PORFOLIO
AS OF DECEMBER 31, 1999

<TABLE>
<CAPTION>
                                                                      Percentage
Port-                                                                  of Total
folio                                                                    Market
No.     Common Stocks                 Shares     Cost (1)     Value (1)   Value
- ---     -------------                 ------     --------      --------   -----
<S>  <C>                              <C>      <C>           <C>           <C>
375 Buffets Inc.                       7,000 $     81,624   $    70,000  0.05 %
376 Comp-USA Inc.                     15,500      335,938        79,438  0.05 %
377 Dreyers Grand Ice Cream Inc.       4,600       72,144        78,200  0.05 %
378 Granite Construction Inc.          4,550       89,853        83,891  0.05 %
379 Hunt JB Trans. Svcs. Inc.          5,900      130,063        81,678  0.05 %
380 Navigant Consulting                6,900      276,705        75,038  0.05 %
381 Overseas Shipholding Group Inc.    5,600      104,659        82,950  0.05 %
382 Rollins, Inc.                      5,050      104,899        75,750  0.05 %
383 Ryerson Tull                       4,100       96,724        79,694  0.05 %
384 Schulman A Inc.                    5,150      108,444        84,009  0.05 %
385 Structural Dynamic                 6,000      116,598        76,500  0.05 %
386 Acuson                             4,500       77,214        56,531  0.04 %
387 Arnold Inds.                       4,100       66,683        57,656  0.04 %
388 Cleveland Cliffs Inc.              1,800       75,430        56,025  0.04 %
389 Ethyl Corporation                 13,900      114,949        54,731  0.04 %
390 Stewart & Stevenson                4,700      111,064        55,666  0.04 %
391 International Multifoods Corp.     3,100       75,497        41,075  0.03 %
392 Lance Inc.                         5,000       98,190        50,000  0.03 %
393 Lone Star Steakhouse               5,500      118,042        49,070  0.03 %
394 Maxxam Inc.                        1,200       58,484        51,450  0.03 %
395 NCH Corporation                      900       55,077        40,106  0.03 %
396 Vlasic Food                        7,600      159,368        43,225  0.03 %
397 Burlington Inds. Inc.              8,800       93,171        35,200  0.02 %
398 Heilg-Meyers Co.                   9,975      134,787        27,431  0.02 %
399 Magnetek Inc.                      4,000       58,783        30,750  0.02 %
400 Oregon Steel Mills Inc.            4,300       72,711        34,093  0.02 %
                                   --------- ------------- ------------ ------
                                   4,979,112 $136,373,127  $153,741,098   100 %
                                   ========= ============= ============ ======

</TABLE>

NOTE:
(1) See Notes to Financial Statements.


                                     D - 18

<PAGE>

DEFINED ASSET FUNDS--REGISTERED TRADEMARK--

<TABLE>
<S>                                      <C>
HAVE QUESTIONS ?                         EQUITY INVESTOR FUND
Request the most                         INDEX SERIES
recent free Information                  S&P 500 TRUST 2
Supplement that gives more               S&P 500 MIDCAP TRUST
details about the Fund,                  (A Unit Investment Trust)
by calling:                              ---------------------------------------
The Chase Manhattan Bank                 This Prospectus does not contain
1-800-323-1508                           complete information about the
The Bank of New York                     investment company filed with the
1-800-221-7771                           Securities and Exchange Commission in
                                         Washington, D.C. under the:
                                         - Securities Act of 1933 (file no.
                                         33-44844) and
                                         - Investment Company Act of 1940 (file
                                         no. 811-3044).
                                         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.
                                                                     14124--4/00
</TABLE>
<PAGE>
                       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).

    1.11.1-- Merrill Lynch Code of Ethics (incorporated by reference to Exhibit
             1.11.1 to Post-Effective Amendment No. 2 to the Registration
             Statement of Equity Participation Series, Low Five Portfolio,
             Defined Asset Funds, 1933 Act File No. 333-05685).

    1.11.2-- Equity Investor Fund Code of Ethics (incorporated by reference to
             Exhibit 1.11.2 to Post-Effective Amendment No. 2 to the
             Registration Statement of Equity Participation Series, Low Five
             Portfolio, Defined Asset Funds, 1933 Act File No. 333-05685).

    5.1  --Consent of independent accountants.

    9.1  -- Information Supplement (incorporated by reference to Exhibit 9.1 to
           the Registration Statement of Equity Investor Fund, Select Ten
           Portfolio 1999 International Series A (United Kingdom Portfolio),
           1933 Act File No. 333-70593).

                                      R-1
<PAGE>
                             DEFINED ASSET FUNDS--
                              EQUITY INVESTOR FUND
                                  INDEX SERIES
                                S&P 500 TRUST 2
                                S&P MIDCAP TRUST

                                   SIGNATURES

    PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT,
DEFINED ASSET FUNDS, EQUITY INVESTOR FUND, INDEX SERIES, S&P 500 TRUST 2, S&P
MIDCAP TRUST 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 12TH DAY OF
APRIL, 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

<TABLE>
<S>                                       <C>
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
</TABLE>

     GEORGE A. SCHIEREN
     JOHN L. STEFFENS
     By JAY FIFE
       (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:
                                                                33-49753,
                                                                33-55073,
                                                                333-10441 and
                                                                333-63417
</TABLE>

     JAMES DIMON
     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 and
  Reynolds Inc.:                            333-13039
</TABLE>

     RICHARD M. DeMARTINI
     ROBERT J. DWYER
     CHRISTINE A. EDWARDS
     CHARLES A. FIUMEFREDDO
     JAMES F. HIGGINS
     MITCHELL M. MERIN
     STEPHEN R. MILLER
     RICHARD F. POWERS III
     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


                                                                     Exhibit 5.1
                       CONSENT OF INDEPENDENT ACCOUNTANTS

The Sponsors and Trustee of Defined Asset Funds, Equity Investor Fund,
Index Series, S&P 500 Trust 2, S&P Midcap Trust

We consent to the use in this Post-Effective Amendment No. 8 to Registration
Statement No. 33-44844 of our opinion dated March 28, 2000 appearing in the
Prospectus, which is part of such Registration Statement, and to the reference
to us under the heading "How The Fund Works--Auditors" in such Prospectus.

DELOITTE & TOUCHE LLP
New York, N.Y.
April 12, 2000



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