EQUITY INVESTOR FD SEL TEN RET PORT SER 1998 DEF ASSET FD
497, 1998-02-12
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                                                   DEFINED ASSET FUNDSSM
- --------------------------------------------------------------------------------

EQUITY INVESTOR FUND          The objective of this Defined Fund is total return
SELECT TEN RETIREMENT         through a combination of capital appreciation and
PORTFOLIO                     current dividend income. The common stocks in the
SERIES 1998                   Portfolio were selected by following a strategy
(A UNIT INVESTMENT            that invests for a period of about one year in
TRUST)                        approximately equal values of the ten common
- ------------------------------stocks in the Dow Jones Industrial Average (DJIA)
/ / DESIGNED FOR TOTAL RETURN having the highest dividend yields two business
/ / DEFINED PORTFOLIO OF 10   days before the date of this Prospectus.
      HIGHEST DIVIDEND        The value of Units will fluctuate with the value
      YIELDING DOW STOCKS     of the common stocks in the Portfolio and no
/ / DIVIDEND INCOME           assurance can be given that dividends will be paid
                              or that the Units will appreciate in value.
                              Units are offered only to employee benefit plans
                              established by Merrill Lynch & Co., Inc. and its
                              affiliates ('collectively, the ML Plan') as an
                              investment alternative for plan allocations to
                              help participants meet their personal retirement
                              needs and goals. The ML Plan will invest in Units
                              in accordance with allocation instructions
                              received from employees pursuant to the plan.
                              Accordingly, the interests of an employee in the
                              Units is subject to the terms of the ML Plan and
                              the terms on which Units are offered as an
                              investment alternative under the ML Plan. The
                              rights of the ML Plan as a Holder of Units should
                              be distinguished from the rights of an employee.
                              The term 'Holder' in this Prospectus refers to the
                              ML Plan.


                               -------------------------------------------------
                               THESE SECURITIES HAVE NOT BEEN APPROVED OR
                               DISAPPROVED BY THE SECURITIES AND EXCHANGE
                               COMMISSION OR ANY STATE SECURITIES COMMISSION NOR
                               HAS THE COMMISSION OR ANY STATE SECURITIES
                               COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY
                               OF THIS DOCUMENT. ANY REPRESENTATION TO THE
                               CONTRARY IS A CRIMINAL OFFENSE.
                               Inquiries should be directed to the Trustee at
SPONSOR:                       1-800-221-7771.
Merrill Lynch,                 Prospectus dated February 11, 1998.
Pierce, Fenner & Smith         INVESTORS SHOULD READ THIS PROSPECTUS CAREFULLY
Incorporated                   AND RETAIN IT FOR FUTURE REFERENCE.

<PAGE>
- --------------------------------------------------------------------------------
Def ined Asset FundsSM
Defined Asset Funds is America's oldest and largest family of unit investment
trusts, with over $115 billion sponsored over the last 25 years. Each Defined
Asset Fund is a portfolio of preselected securities. The portfolio is divided
into 'units' representing equal shares of the underlying assets. Each unit
receives an equal share of income and principal distributions.
- ----------------------------------------------------------------
Defining the Strategy
- ----------------------------------------------------------------
The Select Ten Retirement Portfolio follows a simple, time-tested Strategy: buy
approximately equal amounts of the ten highest dividend-yielding common stocks
(Strategy Stocks) of the 30 stocks in the DJIA* (determined as of two business
days prior to the date of this Prospectus) and hold them for about one year. At
the end of the year, the Portfolio will be liquidated and the Strategy reapplied
to the DJIA to select a new portfolio. It is anticipated that a new Portfolio
will be offered each year to enable employees to continue the Strategy with
their ML Plan allocations. Each Portfolio is designed to be part of a longer
term strategy and investors are advised to follow the Strategy for at least a
three to five year period. For more than two decades, over those periods, the
Strategy has never lost money.
The Strategy provides a disciplined approach to investing, based on a buy and
hold philosophy, which ignores market timing and investment research and rejects
active management of the Portfolio. Merrill Lynch, Pierce, Fenner & Smith
Incorporated as sponsor of the Select Ten Retirement Portfolio (the 'Sponsor')
anticipates that the Portfolio will remain unchanged over its one-year life
despite any adverse developments concerning an issuer, an industry or the
economy or stock market generally. Although Select Ten Portfolios were not
available until 1991, a strategy of investing in approximately equal values of
Strategy Stocks (but not necessarily a given Portfolio) each year would have
yielded a higher total return than an investment in all of the stocks of the
DJIA, on a hypothetical basis in 16 of the last 25 years. Of course, past
performance of the Strategy can be no guarantee of future results and there can
be no assurance that the Portfolio will outperform the DJIA over its one-year
life, especially because of Portfolio expenses, or that the Strategy will not
lose money over its one-year life or over consecutive annual periods.
- ------------
* The name 'Dow Jones Industrial Average' is the property of Dow Jones &
Company, Inc., which is not affiliated with the Sponsor, has not participated in
any way in the creation of the Portfolio or in the selection of stocks included
in the Portfolio and has not reviewed or approved any information included in
this Prospectus.
- ----------------------------------------------------------------
Defining Your Portfolio
- ----------------------------------------------------------------
The Portfolio is diversified by industry. Based upon the principal business of
each issuer and current market values, the following industries are represented
in the Portfolio:
                                                                     APPROXIMATE
                                       PORTFOLIO PERCENTAGE
  / / Oil and Gas                                                            20%
/ / Automobile Manufacturing                                                  10
  / / Chemical Products                                                       10
  / / Financial Services and Banking                                          10
/ / Forest Products and Paper                                                 10
/ / Manufacturing                                                             10
/ / Photo Equipment/Supplies                                                  10
/ / Telecommunications                                                        10
/ / Tobacco and Food Processing                                               10
- ----------------------------------------------------------------
Defining Your Risks
- ----------------------------------------------------------------
The Strategy Stocks, as the 10 highest yielding stocks in the DJIA, generally
share attributes that have caused them to have lower prices or higher yields
relative to the other stocks in the DJIA. The Strategy Stocks may, for example,
be experiencing financial difficulty, or be out of favor in the market because
of weak performance, poor earnings forecasts or negative publicity; or they may
be reacting to general market cycles. The Strategy is therefore contrarian in
nature. The Strategy Stocks are chosen solely by application of the Strategy to
determine the highest yielding DJIA stocks. The Portfolio does not reflect any
investment recommendations of the Sponsor and one or more of the stocks in the
Portfolio may, from time to time, be subject to sell recommendations by the
Sponsor.
The Portfolio is not an appropriate investment for those who are not comfortable
with the Strategy or for those who are unable or unwilling to assume the risk
involved generally with an equity investment. It may not be appropriate for
investors seeking either preservation of capital or high current income.
There can be no assurance that the market factors that caused the relatively low
prices and high yields of the Strategy Stocks will change, that any negative
conditions adversely affecting the stock price will not deteriorate, that the
dividend rates on the Strategy Stocks will be maintained or that share prices
will not decline further during the life of the Portfolio, or that the Strategy
Stocks will continue to be included in the DJIA.
Unit price fluctuates with the value of the Portfolio, and the value of the
Portfolio could be affected by changes in the financial condition of the
issuers, changes in the various industries represented in the Portfolio,
movements in stock prices generally, the impact of the purchase and sale of
securities for a Portfolio (especially during the rollover period) and
                                      A-2
<PAGE>
other factors. Additionally, equity markets have been at historically high
levels and no assurance can be given that these levels will continue. Therefore,
there is no guarantee that the objective of the Portfolio will be achieved.
Also, the return on an investment in the Portfolio will be lower than the
hypothetical returns on Strategy Stocks because the Portfolio pays brokerage
commissions and expenses, purchases Strategy Stocks at different prices, is not
fully invested at all times and because of other factors described under
Performance Information.
Unlike a mutual fund, the Portfolio is not actively managed and the Sponsor
receives no management fee. Therefore, the adverse financial condition of an
issuer or any market movement in the price of a security will not require the
sale of securities from the Portfolio. Although the Sponsor may instruct the
Trustee to sell securities under certain limited circumstances, given the
investment philosophy of the Portfolio, the Sponsor is not likely to do so. The
Portfolio may continue to purchase or hold securities originally selected even
though the market value and yields on the securities may have changed or the
securities may no longer be included in the DJIA.
The Portfolio is not considered to be 'concentrated' in stocks of any particular
industry.
- ----------------------------------------------------------------
Defining Your Investment
- ----------------------------------------------------------------
OFFERING OF UNITS
Units may be purchased by certain employee benefit plans established for
employees of Merrill Lynch & Co., Inc. and its affiliates. The ML Plan may buy
Units only directly from the Trustee and may realize the value of Units only by
tendering them for redemption. See Fund Description--ML Plan in Part B. Units of
this Portfolio may not be held outside of the ML Plan.
OFFER PRICE PER 1,000 UNITS                      $1,000.00
The Offer Price as of February 10, 1998, the business day prior to the initial
date of deposit is based on the aggregate value of the underlying securities
($103,455.00) and any cash held to purchase securities ($6,545.00), divided by
the number of units outstanding (110,000) times 1,000. The Offer Price on any
subsequent date will vary. The underlying securities are valued by the Trustee
on the basis of their closing sale prices at 4:00 p.m. Eastern time on every
business day.
SPONSOR'S ADMINISTRATIVE FEE
Units are subject to the Sponsor's Administrative Fee (for reimbursement of
direct expenses), accrued on a daily basis while the Units are held. Payment of
this fee will be made from dividend income from the stocks held in the
Portfolio. See Expenses.
ROLLOVER
If your ML Plan assets are invested in a Select Ten Retirement Portfolio at the
termination of the Portfolio, the Plan Administrator will redeem Plan units and
reinvest the proceeds in units of the successor Select Ten Retirement Portfolio.
The new Portfolio will hold the then current Strategy Stocks. Of course, if you
no longer wish to hold the Select Ten Retirement Portfolio, you can change your
Plan allocation instructions at any time as permitted by the ML Plan.
DISTRIBUTIONS
The ML Plan as Holder will receive distributions of any dividend income, net of
expenses, on the 10th of May, August and November 1998 and January 1999, for all
units owned on the 9th of those months.
                                      A-3
<PAGE>
AUTOMATIC REINVESTMENT
Distributions to the ML Plan will be automatically reinvested into additional
Units of the Portfolio. Reinvesting helps to compound your income for a greater
total return.
TAXES
Because the ML Plan is exempt from tax under Section 501(a) of the Internal
Revenue Code of 1986, as amended, while Units are held by the ML Plan, neither
it nor any participating employee will be taxed on income from the Portfolio.
TERMINATION DATE
The Portfolio will terminate by February 11, 1999. The Portfolio may be
terminated earlier if its value is less than 40% of the value of the securities
when deposited.
- ----------------------------------------------------------------
Defining Your Costs
- ----------------------------------------------------------------
Although each Portfolio has a term of only one year and is a unit investment
trust rather than a mutual fund, the following information is presented to
facilitate a comparison of fees and an understanding of the direct or indirect
costs and expenses that ML Plan participants bear.
SPONSOR'S ADMINISTRATIVE FEE
Maximum of $0.10 annually per 1,000 Units (0.01% of initial offering price),
accrued daily (not to exceed its direct expenses). See Fund Description--ML
Plan.
ESTIMATED ANNUAL FUND OPERATING EXPENSES

                                         As a %        Amount per
                                  of Net Assets       1,000 Units
                                  -----------------  --------------
Trustee's Fee                              .090%       $     0.90
Organizational Costs                       .161%       $     1.61
Other Operating Expenses                   .018%       $     0.18
                                  -----------------  --------------
TOTAL                                      .269%       $     2.69

These estimates do not include the costs of purchasing and selling the
underlying Strategy Stocks.
This Portfolio (and therefore the investors) will bear all or a portion of its
organizational costs--including costs of preparing the registration statement,
the trust indenture and other closing documents, registering units with the SEC
and the states and the initial audit of the Portfolio--as is common for mutual
funds.
COSTS OVER TIME
A participant would bear the following cumulative expenses, including the
administrative fee, on a $1,000 investment, assuming a 5% annual return on the
investment throughout the indicated periods and redemption at the end of the
period:

 1 Year     3 Years    5 Years    10 Years
   $3         $9         $16         $35

This information assumes the principal amount and distributions are rolled over
each year into a successor Portfolio.
The example assumes reinvestment of all dividends and distributions and uses a
5% annual rate of return as mandated by SEC regulations applicable to mutual
funds.
The example should not be considered a representation of past or future expenses
or annual rates of return; the actual expenses and annual rates of return may be
more or less than the example.
SELLING YOUR INVESTMENT
The ML Plan as Holder may redeem Units at any time. The price will be based on
the then current net asset value. The redemption price as of February 10, 1998
was $1,000 per 1,000 units. If you reinvest in the new Series, you will pay your
share of any brokerage commissions on the sale of underlying securities when
your Units are liquidated during the rollover.
                                      A-4
<PAGE>
- --------------------------------------------------------------------------------
                               Defined Portfolio
- --------------------------------------------------------------------------------
Equity Investor Fund
Select Ten Retirement Portfolio--Series 1998                   February 11, 1998
Defined Asset Funds

<TABLE>
<CAPTION>
                                                                                                   PRICE
                                        TICKER         PERCENTAGE              CURRENT           PER SHARE          COST
NAME OF ISSUER                          SYMBOL         OF FUND (1)       DIVIDEND YIELD (2)       TO FUND        TO FUND (3)
- -------------------------------------------------------------------------------------------------------------------------------
<S>                                     <C>             <C>               <C>                  <C>            <C>

1. Philip Morris Companies, Inc.          MO                10.22%                 3.68%        $    43.5000   $     10,570.50
2. J.P. Morgan & Company, Inc.            JPM                9.71                  3.41             111.5625         10,040.62
3. Chevron Corporation                    CHV                9.85                  3.23              75.5000         10,192.50
4. General Motors Corporation             GM                 9.90                  3.16              63.2500         10,246.50
5. Eastman Kodak Company                  EK                10.30                  2.68              65.7500         10,651.50
6. Exxon Corporation                      XON               10.25                  2.64              62.0625         10,612.68
7. Minnesota Mining & Manufacturing
    Company                               MMM                9.75                  2.46              86.1875         10,083.94
8. American Telephone & Telegraph
    Company                                T                 9.74                  2.12              62.1875         10,074.38
9. International Paper Company            IP                 9.93                  2.10              47.5625         10,273.50
10. Du Pont (E.I.) De Nemours &
    Company                               DD                10.35                  2.01              62.6250         10,708.88
                                                    -----------------                                         -----------------
                                                           100.00%                                             $    103,455.00
                                                    -----------------                                         -----------------
                                                    -----------------                                         -----------------

- ------------------------------------
</TABLE>


(1) Based on Cost to Fund.
(2) Current Dividend Yield for each security was calculated by annualizing the
    last quarterly or semi-annual ordinary dividend declared on the security and
    dividing the result by its market value as of the close of trading on
    February 10, 1998.
(3) Valuation by the Trustee made on the basis of closing sale prices at the
    evaluation time on February 10, 1998.
                      ------------------------------------
The securities were acquired on February 10, 1998 and are represented entirely
by contracts to purchase the securities. The Sponsor may have acted as
underwriter, manager or co-manager of a public offering of other securities in
this Fund during the last three years. Affiliates of the Sponsor may serve as
specialists in the securities in this Fund on one or more stock exchanges and
may have a long or short position in any of these securities or in options on
any of them, and may be on the opposite side of public orders executed on the
floor of an exchange where the securities are listed. An officer, director or
employee of the Sponsor may be an officer or director of one or more of the
issuers of the securities in the Fund. The Sponsor may trade for its own account
as an odd-lot dealer, market maker, block positioner and/or arbitrageur in any
of the securities or in options on them. The Sponsor, its affiliates, directors,
elected officers and employee benefits programs may have either a long or short
position in any securities or in options on them.
                                      A-5
<PAGE>
- --------------------------------------------------------------------------------
              Hypothetical Strategy Stock Performance Information
- --------------------------------------------------------------------------------
Select Ten Portfolios are based on a strategy of investing equal amounts in the
10 highest dividend-yielding stocks ('Strategy Stocks') in the DJIA each year.
Although the Strategy Stocks underperformed the DJIA in eight of the last 25
years, their total return over several years generally outperformed the DJIA.
This is why the Sponsors recommend following the Strategy for at least three to
five years. Only the average annualized total return figures at the bottom of
each column reflect reinvestment of dividends (at the end of each year). The
results below are hypothetical for the following reasons: None of these figures
reflects any expenses or brokerage commissions which investors in the Portfolio
bear. Portfolio performance will also differ from the hypothetical performance
of Strategy Stocks because Select Ten Portfolios are established at various
times during a year, Portfolios may not be fully invested at all times or
equally weighted in all 10 stocks, and their stocks are normally purchased or
sold at prices different from the closing prices used in buying and selling
Portfolio units. Past performance is no guaranty of future results of the
Strategy or any Select Ten Portfolio.
             COMPARISON OF DIVIDENDS, APPRECIATION AND TOTAL RETURN
  (FIGURES DO NOT REFLECT SALES CHARGES, COMMISSIONS, FUND EXPENSES OR TAXES)

<TABLE>
<CAPTION>
                                                      STRATEGY STOCKS(1)             DOW JONES INDUSTRIAL AVERAGE (DJIA)
           -----------------------------------------------------------------  ----------------------------------------------
  YEAR     APPRECIATION(2)    ACTUAL DIVIDEND YIELD(3)     TOTAL RETURN(4)    APPRECIATION(2)    ACTUAL DIVIDEND YIELD(3)
- ---------  -----------------  ---------------------------  -----------------  -----------------  ---------------------------
<S>        <C>                <C>                          <C>                <C>                <C>

     1973          -6.22%                   5.20%                  -1.02%            -16.58%                   3.46%
     1974          -7.73                    7.42                   -0.31             -27.57                    4.43
     1975          49.06                    7.96                   57.02              38.32                    6.08
     1976          27.69                    7.12                   34.81              17.86                    4.86
     1977          -6.75                    5.92                   -0.83             -17.27                    4.56
     1978          -6.94                    7.10                    0.16              -3.15                    5.84
     1979           3.94                    8.41                   12.35               4.19                    6.33
     1980          17.83                    8.54                   26.37              14.93                    6.48
     1981          -0.94                    8.41                    7.47              -9.23                    5.83
     1982          17.24                    8.22                   25.46              19.60                    6.19
     1983          30.22                    8.24                   38.46              20.30                    5.38
     1984           0.69                    6.65                    7.34              -3.76                    4.82
     1985          21.66                    6.97                   28.63              27.66                    5.12
     1986          23.76                   10.81                   34.57              22.58                    4.33
     1987           1.87                    5.10                    6.97               2.26                    3.76
     1988          15.71                    5.79                   21.50              11.85                    4.10
     1989          20.35                    6.95                   27.30              26.96                    4.75
     1990         -13.00                    5.06                   -7.94              -4.34                    3.77
     1991          28.16                    5.21                   33.37              20.32                    3.61
     1992           3.62                    4.70                    8.32               4.17                    3.17
     1993          22.71                    4.21                   26.92              13.72                    3.00
     1994          -0.19                    4.08                    3.89               2.14                    2.81
     1995          32.45                    4.03                   36.48              33.45                    3.03
     1996          24.46                    3.48                   27.94              26.01                    2.56
     1997          18.34                    3.25                   21.59              22.64                    2.14
Average Annualized Total Return                                    18.12
 
<CAPTION>

  YEAR     TOTAL RETURN(4)
- ---------  -----------------
<S>        <C>

     1973         -13.12%
     1974         -23.14
     1975          44.40
     1976          22.72
     1977         -12.71
     1978           2.69
     1979          10.52
     1980          21.41
     1981          -3.40
     1982          25.79
     1983          25.68
     1984           1.06
     1985          32.78
     1986          26.91
     1987           6.02
     1988          15.95
     1989          31.71
     1990          -0.57
     1991          23.93
     1992           7.34
     1993          16.72
     1994           4.95
     1995          36.48
     1996          28.57
     1997          24.78
Average A          13.01

- ------------------------------------
</TABLE>

(1) The Strategy Stocks for any given year were selected by ranking the dividend
    yields for each of the stocks in the DJIA as of the beginning of that year,
    based upon an annualization of the last quarterly or semi-annual regular
    dividend distribution (which would have been declared in the preceding year)
    divided by that stock's market value on the first trading day that year on
    the New York Stock Exchange.
(2) Appreciation for the Strategy Stocks is calculated by subtracting the market
    value of these stocks at the opening value on the first trading day on the
    New York Stock Exchange in a given year from the market value of those
    stocks at the closing value on the last trading day in that year, and
    dividing the result by the market value of the stocks at the opeining value
    on the first trading day in that year. Appreciation for the DJIA is
    calculated by subtracting the opening value of the DJIA on the first trading
    day in each year from the closing value of the DJIA on the last trading day
    in that year, and dividing the result by the opening value of the DJIA on
    the first trading day in that year.
(3) Actual Dividend Yield for the Strategy Stocks is calculated by adding the
    total dividends on the stocks in the year and dividing the result by the
    market value of the stocks on the first trading day in that year. Actual
    Dividend Yield for the DJIA is calculated by taking the total dividends
    credited to the DJIA and dividing the result by the opening value of the
    DJIA on the first trading day of the year.
(4) Total Return represents the sum of Appreciation and Actual Dividend Yield.
    Individual year Total Returns do not take into consideration any
    reinvestment of dividend income.
                                      A-6
<PAGE>
- --------------------------------------------------------------------------------
           Past Performance of Prior Select Ten Retirement Portfolio
- --------------------------------------------------------------------------------
The first Select Ten Retirement Portfolio was offered in 1996. The following
table shows the actual performance of the 1996 Series. The table also shows the
Average Annual Total Return and the Cumulative Total Return for the 1996 and
1997 Series. These past performance returns reflect an investment made in the
initial 1996 Portfolio and assume a rollover into the successor 1997 Portfolio.
Past performance is no guarantee of future results of the Select Ten Strategy or
of any Portfolio currently offered.

<TABLE>
<CAPTION>
                                                                                                          CUMULATIVE
                                                       DIVIDEND                                                TOTAL
    RETIREMENT SERIES               TERM               YIELD(1)     APPRECIATION(2)    TOTAL RETURN(3)        RETURN
- -------------------------  ----------------------  ---------------  -----------------  ----------------  ------------
<S>                        <C>                     <C>              <C>                <C>               <C>

1996 Series                     2/20/96-  2/11/97          2.67%*           26.30%*            28.97%*
  Average Annual
  Total Return(4)               2/20/96- 12/31/97            --                --              24.95
  Cumulative
  Total Return                   2/20/96-12/31/97            --                --                 --           51.43%*
Performance for
Latest Year                       1/1/97-12/31/97            --                --              24.32%

- ------------------------------------
</TABLE>

(1) Dividends paid on the securities to the Portfolio less ongoing expenses,
    divided by maximum initial public offering price.
(2) Represents the difference between initial unit price and redemption or
    liquidation price on the ending date (reflecting brokerage commissions paid
    by the Portfolio and organization expenses, and assuming reinvestment of
    dividends on the distribution dates), divided by the maximum initial public
    offering price.
(3) Appreciation plus Dividend Yield. Reflects reinvestment of dividends,
    deduction of ongoing expenses, but no adjustment for taxes payable.
(4) Average Annual Total Return includes the brokerage commissions paid in
    selling securities received in kind on annual rollovers.
- ------------------------------------
 * Figures are not annualized.
                                      A-7
<PAGE>
                       REPORT OF INDEPENDENT ACCOUNTANTS
The Sponsor, Trustee and Holders of Defined Asset Funds, Equity Investor Fund
Select Ten Retirement Portfolio--Series 1998, Defined Asset Funds (the 'Fund'):
We have audited the accompanying statement of condition and the related
portfolio included in the prospectus of the Fund as of February 11, 1998. This
financial statement is the responsibility of the Trustee. Our responsibility is
to express an opinion on this financial statement based on our audit.
We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statement is free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statement. Our procedures included
confirmation of an irrevocable letter of credit deposited for the purchase of
securities, as described in the statement of condition, with the Trustee. An
audit also includes assessing the accounting principles used and significant
estimates made by the Trustee, as well as evaluating the overall financial
statement presentation. We believe that our audit provides a reasonable basis
for our opinion.
In our opinion, the financial statement referred to above presents fairly, in
all material respects, the financial position of the Fund as of February 11,
1998 in conformity with generally accepted accounting principles.
DELOITTE & TOUCHE LLP
New York, NY
February 11, 1998
                 STATEMENT OF CONDITION AS OF FEBRUARY 11, 1998
TRUST PROPERTY

Investments--Contracts to purchase Securities(1).........$         103,455.00
Cash.....................................................            6,545.00
Organizational Costs(2)..................................           80,500.00
                                                         --------------------
           Total.........................................$         190,500.00
                                                         --------------------
                                                         --------------------
LIABILITIES AND INTEREST OF HOLDERS
     Accrued Liability(2)................................$          80,500.00
                                                         --------------------
Interest of Holders of 110,000 Units of fractional
  undivided interest outstanding:
  Cost to investors(3)...................................$         110,000.00
                                                         --------------------
           Total.........................................$         190,500.00
                                                         --------------------
                                                         --------------------

- ---------------
          (1) Aggregate cost to the Fund of the securities listed under Defined
Portfolio determined by the Trustee at 4:00 p.m., Eastern time on February 10,
1998. The contracts to purchase securities are collateralized by an irrevocable
letter of credit which has been issued by DBS Bank, New York Branch, in the
amount of $103,536.45 and deposited with the Trustee. The amount of the letter
of credit includes $103,455.00 for the purchase of securities.
          (2) This represents a portion of the Fund's organizational costs which
will be deferred and amortized over the life of the Fund. Organizational costs
have been estimated based on projected total assets of $50 million. To the
extent the Fund is larger or smaller, the estimate may vary.
          (3) Aggregate offer price computed on the basis of the value of the
underlying securities at 4:00 p.m., Eastern time on February 10, 1998. There is
no sales charge. Instead, Units are subject to accrual of a Sponsor's
administrative fee at the annual rate per 1,000 Units set forth under Defining
Your Costs.
                                      A-8
<PAGE>
                             DEFINED ASSET FUNDSSM
                               PROSPECTUS--PART B
              EQUITY INVESTOR FUND SELECT TEN RETIREMENT PORTFOLIO
             FURTHER INFORMATION REGARDING THE FUND MAY BE OBTAINED
     WITHIN FIVE DAYS OF WRITING OR CALLING THE TRUSTEE AT THE ADDRESS AND
        TELEPHONE NUMBER SET FORTH ON THE BACK COVER OF THIS PROSPECTUS.
                                     Index

                                                          PAGE
                                                        ---------
Fund Description......................................          1
Risk Factors..........................................          3
How to Buy Units......................................          4
How to Redeem or Sell Units...........................          5
Income, Distributions and Reinvestment................          6
Expenses..............................................          6
                                                          PAGE
                                                        ---------
Taxes.................................................          7
Records and Reports...................................          7
Trust Indenture.......................................          7
Miscellaneous.........................................          8
Supplemental Information..............................          8

FUND DESCRIPTION
THE STRATEGY
     Simple strategies can sometimes be the most effective. The Fund seeks total
return by acquiring the ten highest dividend yielding stocks in the Dow Jones
Industrial Average as of the date indicated in Part A, and holding them for
about one year. This investment strategy is based on three time-tested
investment principles: time in the market is more important than timing the
market; the stocks to buy are the ones everyone else is selling; and dividends
can be an important part of total return. An investment in the Fund can be
cost-efficient, avoiding the odd-lot costs of buying small quantities of
securities directly. Purchasing a portfolio of these stocks as opposed to one or
two provides a more diversified holding. There is only one investment decision
instead of ten, four quarterly dividends instead of 40. Investments in a number
of companies with high dividends relative to their stock prices is designed to
increase the Fund's potential for higher returns. Investing in these stocks of
the DJIA may be effective as well as conservative because regular dividends are
common for established companies and dividends have accounted for a substantial
portion of the total return on stocks of the DJIA as a group. The Fund's return
will consist of a combination of capital appreciation and current dividend
income. The Fund will terminate in about one year. There can be no assurance
that the dividend rates on the selected stocks will be maintained. Reduction or
elimination of a dividend could adversely affect the stock price as well.
     The first DJIA, consisting of 12 stocks, was published in The Wall Street
Journal in 1896. The Dow Jones Industrial Average includes some of the most
well-known, widely followed and highly capitalized companies in America. These
companies are major factors in their industries. These companies file
information with the SEC which is available free of charge upon request from the
Trustee.
                                       1
<PAGE>

    LIST AS OF OCTOBER 1, 1928                CURRENT LIST
- ----------------------------------------------------------------------
Allied Chemical                    Allied Signal
American Can                       Aluminum Co. of America
American Smelting                  American Express
American Sugar                     AT&T
American Tobbaco                   Boeing
Atlantic Refining                  Caterpillar
Bethlehem Steel                    Chevron
Chrysler                           Coca-Cola
General Electric                   Du Pont
General Motors                     Eastman Kodak
General Railway Signal             Exxon
Goodrich                           General Electric
International Harvester            General Motors
International Nickel               Goodyear
Mack Trucks                        Hewlett-Packard
Nash Motors                        IBM
North American                     International Paper
Paramount Publix                   Johnson & Johnson
Postum, Inc.                       J.P. Morgan & Co.
Radio Corporation of America (RCA) McDonald's
Sears Roebuck                      Merck
Standard Oil of New Jersey         Minnesota Mining & Manufacturing
Texas Corporation                  Philip Morris
Texas Gulf Sulphur                 Procter & Gamble
Union Carbide                      Sears Roebuck
United States Steel                Travelers Group
Victor Talking Machine             Union Carbide
Westinghouse Electric              United Technologies
Woolworth                          Wal-Mart Stores
Wright Aeronautical                Walt Disney

PORTFOLIO SELECTION
     The Portfolio contains ten common stocks in the DJIA having the highest
dividend yields as of the date indicated in Part A. 'Highest dividend yield' is
calculated for each Security by annualizing the last quarterly or semi-annual
ordinary dividend distributed on the Security and dividing the result by its
closing sales price. This yield is historical and there is no assurance that any
dividends will be declared or paid in the future on the Securities. No leverage
or borrowing is used nor does the Portfolio contain other kinds of securities to
enhance yield.
     The Strategy selection process is a straightforward, objective,
mathematical application that ignores any subjective factors concerning an
issuer in the DJIA, an industry or the economy generally. The application of the
Strategy may cause the Portfolio to own a stock that the Sponsor does not
recommend for purchase and, in fact, the Sponsor may have sell recommendations
on a number of the stocks in the Portfolio at the time the stocks are selected
for inclusion in the Portfolio. Various theories attempt to explain why a common
stock is among the ten highest yielding stocks in the DJIA at any given time:
the issuer may be in financial difficulty or out of favor in the market because
of weak earnings or performance or forecasts or negative publicity;
uncertainties relating to pending or threatened litigation or pending or
proposed legislation or government regulation; the stock may be a cyclical stock
reacting to national and international economic developments; or the market may
be anticipating a reduction in or the elimination of the issuer's dividend. Some
of the foregoing factors may be relevant to only a segment of an issuer's
overall business yet the publicity may be strong enough to outweigh otherwise
solid business performance. In addition, companies in certain industries have
historically paid relatively high dividends.
     Additional Units may be created by the deposit of cash (including a letter
of credit) with instructions to purchase additional Securities. This practice
could cause both existing and new investors to experience a dilution of their
                                       2
<PAGE>
investments and a reduction in their anticipated income because of price
fluctuations in the Securities between the time of the cash deposit and the
actual purchase of the additional Securities. To minimize the risk of price
fluctuations when purchasing Securities, the Portfolio will try to purchase
Securities as close to the Evaluation Time or at prices as close to the
evaluated prices as possible.
     The deposit of the Securities in the Fund on the initial date of deposit
established a proportionate relationship among the number of shares of each
Security. During the 90-day period following the initial date of deposit the
Fund may acquire additional Securities by investing the proceeds from selling
additional Units, maintaining to the extent practicable that original
proportionate relationship. Deposits of additional Securities subsequent to the
90-day period must generally replicate exactly the proportionate relationship
among the number of shares of each Security at the end of the initial 90-day
period. The ability to acquire each Security at the same time will generally
depend upon the Security's availability and any restrictions on the purchase of
that Security under the federal securities laws or otherwise.
PORTFOLIO SUPERVISION
     The Portfolio follows a buy and hold investment strategy in contrast to the
frequent portfolio changes of a managed fund based on economic, financial and
market analyses. Although the Portfolio is regularly reviewed, because of the
Strategy, the Portfolio is unlikely to sell any of the Securities, other than to
satisfy redemptions of units, or to cease buying additional shares in connection
with the issuance of Additional Units. More specifically, adverse developments
concerning a Security including the adverse financial condition of the issuer, a
failure to maintain a current dividend rate, the institution of legal
proceedings against the issuer, a default under certain documents materially and
adversely affecting the future declaration of dividends, or a decline in the
price or the occurrence of other market or credit factors (including a public
tender offer or a merger or acquisition transaction) that might otherwise make
retention of the Security detrimental to the interest of investors, will
generally not cause the Fund to dispose of a Security or cease buying it.
Furthermore, the Portfolio will likely continue to hold a Security and purchase
additional shares notwithstanding its ceasing to be included among the ten
highest dividend yielding stocks in the DJIA or even its deletion from the DJIA.
ML PLAN
     The Sponsor, as a 'party in interest' with respect to the ML Plan, is
prohibited by ERISA from selling Units to or buying them from the ML Plan.
Accordingly, the ML Plan will purchase Units directly from the Trustee and may
only tender Units to the Trustee for redemption. It is also prohibited from
acting as dealer, and from charging for its services as broker, for the Trust in
acquiring Securities with monies paid for Units, and in selling Securities to
pay redemptions of Units, by the ML Plan. In addition, ERISA prohibits the
Sponsor from receiving compensation or other consideration except for
reimbursement of its direct expenses. Therefore, the proceeds of the Sponsor's
administrative fee paid by the ML Plan will be used to reimburse the Sponsor for
these expenses, and the Sponsor will not collect the administrative fee on Units
held by the ML Plan at any time when it has no unreimbursed expenses. An
application may be filed with the Department of Labor for exemption from certain
of the ERISA prohibited transaction provisions so that the Sponsor, among other
things, may provide a secondary market for Units held by the ML Plan and may
charge certain fees and recover certain additional costs.
RISK FACTORS
     An investment in the Fund entails certain risks, including the risk that
the value of your investment will decline if the financial condition of the
issuers of the Securities becomes impaired or if the general condition of the
stock market worsens. The rights of holders of common stocks to receive payments
from the issuer are generally inferior to the rights of creditors of, or holders
of debt obligations or preferred stocks issued by, the issuer. Moreover, because
common stocks do not represent an obligation of the issuer they do not offer any
assurance of income or provide the degree of protection of capital provided by
debt securities. Common stocks in general may be especially susceptible to
general stock market movements and to volatile increases and decreases in value
as market confidence in and perceptions of the issuers change. Equity markets
can be affected by unpredictable factors including expectations regarding
government, economic, monetary and fiscal policies, inflation and interest
rates, economic expansion or contraction, and global or regional political,
economic or banking crises. The Sponsor cannot predict the direction or scope of
any of these factors. Additionally, equity markets have been at historically
high levels and no assurance can
                                       3
<PAGE>
be given that these levels will continue. There can be no assurance that the
Portfolio will be effective in achieving its objective over the one-year life of
the Fund or that future portfolios selected through this process during
consecutive one-year periods will meet their objectives. The Portfolio is not
designed to be a complete investment program.
LITIGATION AND LEGISLATION
     The Sponsor does not know of any pending litigation as of the initial date
of deposit that might reasonably be expected to have a material adverse effect
on the Fund, although pending litigation may have a material adverse effect on
the value of Securities in the Fund. In addition, at any time after the initial
date of deposit, litigation may be initiated on a variety of grounds, or
legislation may be enacted, affecting the Securities in the Portfolio or the
issuers of the Securities. Changing approaches to regulation, particularly with
respect to the environment or with respect to the oil and gas or tobacco
industry, may have a negative impact on certain companies represented in the
Portfolio. There can be no assurance that future litigation, legislation,
regulation or deregulation will not have a material adverse effect on the
Portfolio or will not impair the ability of the issuers of the Securities to
achieve their business goals. From time to time Congress considers proposals to
reduce the rate of the dividends-received deduction. This type of legislation,
if enacted into law, would adversely affect the after-tax return to investors
who can take advantage of the deduction. See Taxes.
LIFE OF THE FUND; FUND TERMINATION
     The size and composition of the Portfolio will be affected by the level of
purchases and redemptions of Units that may occur from time to time.
Principally, this will depend upon the number of participants in the ML Plan who
are invested in the Portfolio. The Portfolio will be terminated no later than
the mandatory termination date specified in Part A of the Prospectus. It will
terminate earlier upon the disposition of the last Security or upon the consent
of investors holding 51% of the Units. The Portfolio may also be terminated
earlier by the Sponsor once its total assets have fallen below the minimum value
specified in Part A of the Prospectus. A decision by the Sponsor to terminate
the Portfolio early will be based on factors such as the size of the Portfolio
relative to its original size, the ratio of Portfolio expenses to income, and
the cost of maintaining a current prospectus.
     Notice of impending termination will be provided to the ML Plan and
thereafter Units will no longer be redeemable. On or shortly before termination,
the Trustee will seek to dispose of any Securities remaining in the Portfolio
although any Security unable to be sold at a reasonable price may continue to be
held by the Trustee in a liquidating trust pending its final disposition. A
proportional share of the expenses associated with termination, including
brokerage costs in disposing of Securities, will be borne by investors remaining
at that time. This may have the effect of reducing the amount of proceeds those
investors are to receive in any final distribution.
HOW TO BUY UNITS
UNIT OFFER PRICE
     Units may be purchased by the ML Plan at the Offer Price by means of this
Prospectus. The Offer Price per Unit of the Fund is computed as of the
Evaluation Time by adding the evaluation of the underlying Securities, as
determined by the Evaluator as described under How to Buy Units--Evaluations
below, and any cash held to purchase Securities, divided by the number of Units
outstanding. The Offer Price per Unit of a Trust will vary after the Evaluation
Date (set forth under Defining Your Investment) in accordance with fluctuations
in the evaluations of the underlying Securities. A proportionate share of any
cash held by the Portfolio in the Capital Account not allocated to purchase
Securities and net income in the Income Account on the date of delivery of the
Units to the Plan is added to the Offer Price.
     No sales charge is payable when Units are purchased. Instead, Units are
subject to a Sponsor's administrative fee at the annual rate set forth under
Defining Your Costs. If a Holder sells or redeems Units before the maturity of a
Trust, only the administrative fees accrued to the date of sale or redemption
will be payable, and this will have the effect of reducing the rate of
administrative fees. Similarly, if Units are purchased after the Initial Date of
Deposit, the purchaser will not pay fees previously accrued and this will also
have the effect of reducing the rate of administrative fees.
                                       4
<PAGE>
EVALUATIONS
     Evaluations are determined by the Trustee on each Business Day. This
excludes 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,
evaluations are generally based on closing sales prices on that exchange (unless
the Trustee deems these prices inappropriate) or, if closing sales prices are
not available, at the mean between the closing bid and offer prices. If the
Securities are not listed or if listed but the principal market is elsewhere,
the evaluation is generally determined based on sales prices of the Securities
on the over-the-counter market or, if sales prices in that market are not
available, on the basis of the mean between current bid and offer prices for the
Securities or for comparable securities or by appraisal or by any combination of
these methods. Neither the Sponsors nor the Trustee guarantee the
enforceability, marketability or price of any Securities.
NO CERTIFICATES
     The ML Plan is required to hold the Units in uncertificated form.
HOW TO REDEEM OR SELL UNITS
REDEMPTIONS
     Units may be redeemed by the ML Plan by sending the Trustee a redemption
request.
     By the seventh calendar day after tender the ML Plan will be wired an
amount equal to the Redemption Price per Unit. Because of market movements or
changes in the Portfolio, this price may be more or less than the cost of the
Units. The Redemption Price per Unit is computed each Business Day by adding the
value of the Securities, declared but unpaid dividends on the Securities, cash
and the value of any other Fund assets; deducting unpaid taxes or other
governmental charges, accrued but unpaid Fund expenses including the
administrative fees, unreimbursed Trustee advances, cash held to redeem Units or
for distribution to the ML Plan and the value of any other Fund liabilities; and
dividing the result by the number of outstanding Units.
     If cash is not available in the Fund's Income and Capital Accounts to pay
redemptions, the Trustee may sell Securities selected by the Sponsor in a manner
designed to maintain, to the extent practicable, the proportionate relationship
among the number of shares of each Security. These sales are often made at times
when the Securities would not otherwise be sold and may result in lower prices
than might be realized otherwise and will also reduce the size of the Fund.
Provision is made under the Indenture for the Sponsor to specify the minimum
dollar amount in which blocks of Securities are to be sold in order to obtain
the best price for the Portfolio. While these minimum amounts may vary from time
to time in accordance with market conditions, the Sponsor believes that the
minimum dollar amount which would be specified would be approximately $25,000.
     Redemptions may be suspended or payment postponed if the New York Stock
Exchange is closed other than for customary weekend and holiday closings, if the
SEC determines that trading on that Exchange is restricted or that an emergency
exists making disposal or evaluation of the Securities not reasonably
practicable, or for any other period permitted by the SEC.
ROLLOVER
     Upon termination of the Portfolio the Plan Administrator will redeem Units
held and invest the proceeds in the next Select Ten Retirement Portfolio. The
Plan Administrator may, however, stop offering the Select Ten Retirement
Portfolio as a Plan investment alternative at any time. The Sponsor may, in its
sole discretion and without penalty or liability to investors, decide not to
sponsor any successor Portfolio or decide to modify the terms of the rollover.
Prior notice of any decision would be provided to the Plan Administrator.
     The rollover is accomplished by the in-kind redemption of Units followed by
the sale of the underlying Securities by a distribution agent on behalf of
participating investors and the reinvestment of the sale proceeds (net of
brokerage fees, governmental charges and other sale expenses) in units of the
Successor Portfolio.
     The Sponsor intends to sell the distributed Securities, on behalf of the
distribution agent, as quickly as practicable and then to create units of the
successor Portfolio as quickly as possible, subject in both cases to the
Sponsor's sensitivity that the concentrated sale and purchase of large volumes
of securities may affect market prices in a manner adverse to the interest of
investors. Accordingly, the Sponsor may, in its sole discretion, undertake a
more gradual sale of the distributed Securities and a more gradual creation of
units of the New Portfolio to help mitigate any
                                       5
<PAGE>
negative market price consequences caused by this large volume of securities
trades. There can be no assurance, however, that this procedure will be
successful or might not result in less advantageous prices than had this
procedure not been practiced at all. Pending the investment of rollover proceeds
in the securities to comprise the new Portfolio, those moneys may be uninvested
for up to several days. For those Securities in the Portfolio that will also be
in the new Portfolio, a direct sale of those securities between the two funds is
now permitted pursuant to an SEC exemptive order. These sales will be effected
at the securities' closing sale prices on the exchanges where they are
principally traded, free of any brokerage costs.
     The Division of Investment Management of the SEC is of the view that the
rollover option constitutes an 'exchange offer', for the purposes of Section
11(c) of the Investment Company Act of 1940, and would therefore be prohibited
absent an exemptive order. The Sponsor has received exemptive orders under
Section 11(c) which it believes permit it to offer the rollover, but no
assurance can be given that the SEC will concur with the Sponsor's position and
additional regulatory approvals may be required.
INCOME, DISTRIBUTIONS AND REINVESTMENT
INCOME AND DISTRIBUTIONS
     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 purchases of additional Securities and sales
of Securities. There is no assurance that dividends on the Securities will
continue at their current levels or be declared at all.
     Each Unit receives an equal share of distributions of dividend income net
of estimated expenses and the administrative fee. 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. Dividends received are credited to an Income Account and other receipts
to a Capital Account. A Reserve Account may be created by withdrawing from the
Income and Capital Accounts amounts considered appropriate by the Trustee to
reserve for any material amount that may be payable out of the Fund. Funds held
by the Trustee in the various accounts do not bear interest. Proceeds of the
disposition of any Securities not used to pay the administrative fee or to
redeem Units will be held in the Income and Capital Account, respectively, and
distributed on the final Distribution Date or following liquidation of the Fund.
REINVESTMENT
     Income and principal distributions on Units will be reinvested by
participating in the Fund's reinvestment plan. Under the plan, the Units
acquired for investors will be new Units created by the deposit of cash (or a
bank letter of credit in lieu of cash) with instructions to purchase additional
Securities. Deposits or purchases of additional Securities will generally be
made so as to maintain the then existing proportionate relationship among the
number of shares of each Security in the Fund. Units acquired by reinvestment
will be subject to any unaccrued Administrative Fees. The Sponsor reserves the
right to amend, modify or terminate the reinvestment plan at any time without
prior notice.
EXPENSES
SPONSOR'S ADMINISTRATIVE FEE
     An administrative fee, to reimburse the Sponsor for certain expenses
described under Fund Description--ML Plan, at the rates set forth under Defining
Your Costs, calculated on a daily basis, will be deducted from the Income
Account on each Distribution Date and will be distributed to the Sponsor on
certification of its reimbursable expenses. Accrued administrative fees will be
deducted at the time of any interim redemption.
OTHER EXPENSES
     Estimated Fund expenses are listed in Part A of the Prospectus; if actual
expenses exceed the estimate, the excess will be borne by the Fund. The
estimated expenses do not include any brokerage commissions payable by the
Portfolio in buying and selling Securities. The Trustee's annual fee is payable
in monthly installments. The Trustee
                                       6
<PAGE>
also benefits when it holds cash for the Fund in non-interest bearing accounts.
Possible additional charges include Trustee fees and expenses for extraordinary
services, costs of indemnifying the Trustee and the Sponsor, costs of action
taken to protect the Fund and other legal fees and expenses, Fund termination
expenses and any governmental charges. The Trustee has a lien on Fund assets to
secure reimbursement of these amounts and may sell Securities for this purpose
if cash is not available.
     Expenses incurred in establishing the Fund, including the cost of the
initial preparation of documents relating to the Fund, Federal and State
registration fees, the initial fees and expenses of the Trustee, legal expenses
and any other out-of-pocket expenses will be paid by the Fund and amortized over
the life of the Fund. Advertising and selling expenses will be paid by the
Sponsor at no charge to the Fund. Defined Asset Funds can be a cost-effective
way to purchase and hold investments. Annual operating expenses are generally
lower than for managed funds. Because Defined Asset Funds have no management
fees, limited transaction costs and no ongoing marketing expenses, operating
expenses are generally less than 0.25% a year. When compounded annually, small
differences in expense ratios can make a big difference in your investment
results.
TAXES
     The Fund is not an association taxable as a corporation for federal income
tax purposes. Because the ML Plan is exempt from tax under Section 501(a) of the
Internal Revenue Code of 1986, as amended, while Units are held by the ML Plan,
neither it nor any participating employee will be taxed on income from the
Portfolio.
RECORDS AND REPORTS
     The Trustee keeps a register of the names, addresses and holdings of all
investors. The Trustee also keeps records of the transactions of the Fund,
including a current list of the Securities and a copy of the Indenture, which
may be inspected by investors at reasonable times during business hours.
     With each distribution, the Trustee includes a statement of the amounts of
income and any other receipts being distributed. Following the termination of
the Fund, the Trustee will send the participating ML Plan a statement
summarizing transactions in the Fund's accounts including amounts distributed
from them, identifying Securities sold and purchased and listing Securities held
and the number of Units outstanding at termination and stating the Redemption
Price per 1,000 Units at termination, and the fees and expenses paid by the
Fund, among other matters. Fund accounts will be audited by independent
accountants selected by the Sponsor and any report of the accountants will be
available from the Trustee on request.
TRUST INDENTURE
     The Portfolio is a 'unit investment trust' created under New York law by a
Trust Indenture between the Sponsor and the Trustee. This Prospectus summarizes
various provisions of the Indenture, but each statement is qualified in its
entirety by reference to the Indenture.
     The Indenture may be amended by the Sponsor and the Trustee without consent
by investors to cure ambiguities or to correct or supplement any defective or
inconsistent provision, to make any amendment required by the SEC or other
governmental agency or to make any other change not materially adverse to the
interest of investors (as determined in good faith by the Sponsor). The
Indenture may also generally be amended upon consent of investors holding 51% of
the Units. No amendment may reduce the interest of any investor in the Fund
without the investor's consent or reduce the percentage of Units required to
consent to any amendment without unanimous consent of investors. Investors will
be notified of the substance of any amendment.
     The Trustee may resign upon notice to the Sponsor. It may be removed by
investors holding 51% of the Units at any time or by the Sponsor without the
consent of investors if it becomes incapable of acting or bankrupt, its affairs
are taken over by public authorities, or if under certain conditions the
Sponsors determine in good faith that its replacement is in the best interest of
the investors. The resignation or removal becomes effective upon acceptance of
appointment by a successor; in this case, the Sponsor will use its best efforts
to appoint a successor promptly; however, if upon resignation no successor has
accepted appointment within 30 days after notification, the resigning Trustee
may apply to a court of competent jurisdiction to appoint a successor.
                                       7
<PAGE>
     The Sponsor and the Trustee are not liable to investors or any other party
for any act or omission in the conduct of their responsibilities absent bad
faith, willful misfeasance, negligence (gross negligence in the case of a
Sponsor) or reckless disregard of duty. The Indenture contains customary
provisions limiting the liability of the Trustee.
MISCELLANEOUS
LEGAL OPINION
     The legality of the Units has been passed upon by Davis Polk & Wardwell,
450 Lexington Avenue, New York, New York 10017, as special counsel for the
Sponsors.
AUDITORS
     The Statement of Condition in Part A of the Prospectus was audited by
Deloitte & Touche LLP, independent accountants, as stated in their opinion. It
is included in reliance upon that opinion given on the authority of that firm as
experts in accounting and auditing.
TRUSTEE
     The Trustee and its address are stated on the back cover of the Prospectus.
The Trustee is subject to supervision by the Federal Deposit Insurance
Corporation, the Board of Governors of the Federal Reserve System and New York
State banking authorities.
SPONSOR
     The Sponsor is listed on the back cover of the Prospectus. Merrill Lynch,
Pierce, Fenner & Smith Incorporated is a wholly-owned subsidiary of Merrill
Lynch & Co., Inc. The Sponsor has acted as principal underwriter and managing
underwriter of other investment companies. The Sponsor, in addition to
participating as a member of various selling groups or as agents of other
investment companies, executes orders on behalf of investment companies for the
purchase and sale of securities of these companies and sells securities to these
companies in its capacities as brokers or dealers in securities.
CODE OF ETHICS
     The Sponsor has adopted a code of ethics requiring preclearance and
reporting of personal securities transactions by its personnel who have access
to information on Defined Asset Funds portfolio transactions. The code is
intended to prevent any act, practice or course of conduct which would operate
as a fraud or deceit on any Fund and to provide guidance to these persons
regarding standards of conduct consistent with the Sponsor's responsibilities to
the Fund.
PERFORMANCE INFORMATION
     Total returns, average annualized returns and/or cumulative returns for
various periods of the Strategy Stocks, the related index, the current and/or
one or more prior Select Ten Portfolios may be included from time to time in
advertisements, sales literature and reports to current or prospective
investors. Total return shows changes in Unit price during the period plus
reinvestment of dividends and capital gains, divided by the maximum public
offering price. Average annualized returns show the average return for stated
periods of longer than a year. Sales material may also include an illustration
of the cumulative results of like annual investments in Strategy Stocks during
an accumulation period and like annual withdrawals during a distribution period.
Figures for actual Portfolios (but not Strategy Stocks or the related index)
reflect deduction of all Portfolio expenses and unless otherwise stated the
maximum sales charge. No provision is made for any income taxes payable. Similar
figures may be given for Strategy Stocks. The performance of Strategy Stocks may
also be shown in comparison to other indexes. Investors should bear in mind that
this represents past performance and is no assurance of future results of the
current or any future Portfolio.
SUPPLEMENTAL INFORMATION
     Upon writing or calling the Trustee shown on the back cover of this
Prospectus, investors will receive without charge supplemental information about
the Fund, which has been filed with the SEC. The supplemental information
                                       8
<PAGE>
includes more detailed risk factor disclosure about the types of securities that
may be part of the Portfolio and general information about the structure and
operation of the Fund.
                                       9
<PAGE>
                             Defined
                             Asset FundsSM

SPONSOR:                           EQUITY INVESTOR FUND
Merrill Lynch,                     SELECT TEN RETIREMENT
Pierce, Fenner & Smith IncorporatedPORTFOLIO--SERIES 1998
Defined Asset Funds
P.O. Box 9051
Princeton, NJ 08543-9051           This Prospectus does not contain all of the
(609) 282-8500                     information with respect to the investment
TRUSTEE:                           company set forth in its registration
The Bank of New York               statement and exhibits relating thereto which
P.O. Box 974                       have been filed with the Securities and
Wall Street Division               Exchange Commission, Washington, D.C. under
New York, NY 10268-0974            the Securities Act of 1933 and the Investment
1-800-221-7771                     Company Act of 1940, and to which reference
                                   is hereby made.
                                   ------------------------------
                                   No person is authorized to give any
                                   information or to make any representations
                                   with respect to this investment company not
                                   contained in its registration statement and
                                   related exhibits; and any information or
                                   representation not contained therein must not
                                   be relied upon as having been authorized.
                                   ------------------------------
                                   When Units of this Fund are no longer
                                   available this Prospectus may be used as a
                                   preliminary prospectus for a future series.

                                                      70052--2/98















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