CORPORATE INCOME FD INSURED SERIES 101 DEFINED ASSET FDS
497, 2000-06-30
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                           DEFINED ASSET FUNDS-REGISTERED TRADEMARK-
                           ----------------------------------------------------

                           CORPORATE INCOME FUND
                           INSURED SERIES--101
                           (A UNIT INVESTMENT TRUST)
                           -  PORTFOLIO OF INSURED LONG TERM CORPORATE BONDS
                           -  DESIGNED FOR HIGH CURRENT INCOME
                           -  MONTHLY INCOME DISTRIBUTIONS
                           -  U.S. TAX EXEMPT FOR MANY FOREIGN HOLDERS

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 June 30, 2000.

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

Def ined 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 and bonds in advance, so you know
    what you're investing in.
  - Professional research: Our dedicated research team seeks out stocks or bonds
    appropriate for a particular fund's objectives.
  - Ongoing supervision: We monitor each portfolio on an ongoing basis.
No matter what your investment goals, tolerance for risk or time horizon,
there's probably a Defined Asset Fund that suits your investment style. Your
financial professional can help you select a Defined Asset Fund that works best
for your investment portfolio.

THE FINANCIAL INFORMATION IN THIS PROSPECTUS IS AS OF THE EVALUATION DATE,
FEBRUARY 29, 2000.

<TABLE>
<S>                                    <C>
CONTENTS
                                       PAGE
                                       ---
Risk/Return Summary..................    3
What You Can Expect From Your
  Investment.........................    6
  Monthly Income.....................    6
  Return Figures.....................    6
  Records and Reports................    6
The Risks You Face...................    7
  Interest Rate Risk.................    7
  Call Risk..........................    7
  Reduced Diversification Risk.......    7
  Liquidity Risk.....................    7
  Concentration Risk.................    7
  Bond Quality Risk..................    7
  Insurance Related Risk.............    7
  Litigation Risk....................    8
Selling or Exchanging Units..........    8
  Sponsors' Secondary Market.........    8
  Selling Units to the Trustee.......    8
  Exchange Option....................    9
How The Fund Works...................    9
  Pricing............................    9
  Evaluations........................   10
  Income.............................   10
  Expenses...........................   10
  Portfolio Changes..................   11
  Fund Termination...................   11
  Certificates.......................   11
  Trust Indenture....................   11
  Legal Opinion......................   12
  Auditors...........................   12
  Sponsors...........................   12
  Trustee............................   13
  Underwriters' and Sponsors'
    Profits..........................   13
  Public Distribution................   13
  Code of Ethics.....................   13
  Year 2000 Issues...................   13
Taxes................................   14
Supplemental Information.............   15
Financial Statements.................  D-1
</TABLE>

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

RISK/RETURN SUMMARY

<TABLE>
<C>  <S>
 1.  WHAT IS THE FUND'S OBJECTIVE?
     The Fund seeks high current interest
     income by investing in a fixed portfolio
     consisting primarily of insured
     corporate bonds.

 2.  WHAT ARE CORPORATE BONDS?
     Corporate bonds are bonds issued by
     companies, governments or other
     institutions to raise money to use in
     their business or to fund their
     activities. In return, they pay a fixed
     rate of interest and principal at
     maturity.

 3.  WHAT IS THE FUND'S INVESTMENT STRATEGY?

  -  The Fund plans to hold to maturity 9
     insured long-term corporate bonds, and
     some short-term U.S. Treasury notes
     reserved to pay the deferred sales fee,
     with a current aggregate face amount of
     $28,814,000.

  -  The Fund is a unit investment trust
     which means that, unlike a mutual fund,
     the Fund's portfolio is not managed.
  -  The bonds are insured by MBIA while they
     remain in the Portfolio.
  -  All of the bonds are rated AAA by
     Standard & Poor's for as long as they
     remain in the Portfolio.
  -  Many of the bonds can be called at a
     premium declining over time to par
     value. Some bonds may be called earlier
     at par for extraordinary reasons.

     The Portfolio consists of corporate
     bonds of the following types of issuers:
</TABLE>

<TABLE>
  -  Corporate Utilities                      98%
<C>  <S>
  -  U.S. Government                        2%
</TABLE>

<TABLE>
<C>  <S>
 4.  WHAT ARE THE SIGNIFICANT RISKS?

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

 5.  IS THIS FUND APPROPRIATE FOR YOU?

     Yes, if you want current monthly income.
     You will benefit from a professionally
     selected and supervised portfolio whose
     risk is reduced by investing in insured
     bonds of several different issuers.
     The Fund is NOT appropriate for you if
     you want a speculative investment that
     changes to take advantage of market
     movements or if you cannot tolerate any
     risk.
</TABLE>

                                       3
<PAGE>

<TABLE>
<C>  <S>
     DEFINING YOUR INCOME
</TABLE>

<TABLE>
<C>  <S>
     WHAT YOU MAY EXPECT (Payable on the 25th day each
     month):
</TABLE>

<TABLE>
<C>  <S>                                           <C>
     Regular Monthly Income per unit:               $ 5.47
     Annual Income per unit:                        $65.67
     RECORD DAY: 10th day of each month

     THESE FIGURES ARE ESTIMATES ON THE EVALUATION DATE;
     ACTUAL PAYMENTS MAY VARY.
</TABLE>

<TABLE>
<C>  <S>
 6.  WHAT ARE THE FUND'S FEES AND EXPENSES?

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

<TABLE>
<C>  <S>                                   <C>
     INVESTOR FEES

                                             3.50%
     Maximum Sales Fee (Load) on new
     purchases (as a percentage of $1,000
     invested)
</TABLE>

<TABLE>
<C>  <S>
     You will pay an up-front sales fee of 2.75%, as
     well as a total deferred sales fee of $3.75 per
     unit (paid in quarterly installments November,
     February, May and August through August, 2000).
     Employees of some of the Sponsors and their
     affiliates may be charged a reduced sales fee
     of no less than $5.00 per Unit.

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

<TABLE>
<CAPTION>
                               YOUR MAXIMUM
                                SALES FEE
          IF YOU INVEST:         WILL BE:
          --------------       ------------
<C>  <S>                       <C>
     Less than $100,000            3.50%
     $100,000 to $249,999          3.25%
     $250,000 to $499,999          3.00%
     $500,000 to $999,999          2.75%
     $1,000,000 and over           2.50%

     Maximum Exchange Fee          2.50%
</TABLE>

<TABLE>
<C>  <S>
     ESTIMATED ANNUAL FUND OPERATING EXPENSES
</TABLE>

<TABLE>
<CAPTION>
                                                   AMOUNT
                                                  PER UNIT
                                                  --------
<C>  <S>                                          <C>
                                                   $0.61
     Trustee's Fee
                                                   $0.56
     Portfolio Supervision,
     Bookkeeping and
     Administrative Fees   (including
     updating
     expenses)
                                                   $0.32
     Evaluator's Fee
                                                   $1.92
     Insurance Premium
                                                   $0.20
     Organization Costs
                                                   $0.32
     Other Operating Expenses
                                                   -----
                                                   $3.93
     TOTAL
</TABLE>

<TABLE>
<C>  <S>
     The Sponsors historically paid organization
     costs and updating expenses.
</TABLE>

<TABLE>
<C>  <S>
 7.  HOW HAVE SIMILAR FUNDS PERFORMED IN THE
     PAST?

     IN THE FOLLOWING CHART WE SHOW PAST
     PERFORMANCE OF PRIOR INSURED SERIES OF
     CORPORATE INCOME FUND, WHICH HAD THE
     SAME INVESTMENT OBJECTIVES, STRATEGIES
     AND TYPES OF BONDS AS THIS FUND. THESE
     PRIOR SERIES DIFFERED IN THAT THEY
     CHARGED A HIGHER SALES FEE. These prior
     Insured Series were offered after 1987
     and were outstanding on March 31, 2000.
     OF COURSE, PAST PERFORMANCE OF PRIOR
     SERIES IS NO GUARANTEE OF FUTURE RESULTS
     OF THIS FUND.

     AVERAGE ANNUAL COMPOUND TOTAL RETURNS
     FOR PRIOR SERIES
     REFLECTING ALL EXPENSES. FOR PERIODS
     ENDED 3/31/00.
</TABLE>

<TABLE>
<CAPTION>
                           WITH SALES FEE         NO SALES FEE
                         1 YEAR     5 YEARS    1 YEAR     5 YEARS
 <S>                    <C>        <C>        <C>        <C>
 -----------------------------------------------------------------
 High                     1.82%      6.88%      5.42%      8.07%
 Average                  -4.61      6.26       -1.21      7.43
 Low                      -8.07      5.50       -4.79      6.67

<C>  <S>

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

 9.  HOW DO I BUY UNITS?

     The minimum investment is one unit.

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

                                       4
<PAGE>

<TABLE>
<C>  <S>
     UNIT PRICE PER UNIT              $909.81
     (as of February 29, 2000)

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

10.  HOW DO I SELL UNITS?

     You may sell your units at any time to
     any Sponsor or the Trustee for the net
     asset value determined at the close of
     business on the date of sale, less any
     remaining deferred sales fee. You will
     not pay any other fee when you sell your
     units.
11.  HOW ARE DISTRIBUTIONS MADE AND TAXED?

     The Fund pays income monthly. Interest
     on the bonds in this Fund is subject to
     federal income taxes for U.S. investors,
     but if you are a non-U.S. investor, your
     interest may be exempt from U.S. federal
     income taxes, including withholding
     taxes. Interest on the U.S. Treasury
     notes will be exempt from state and
     local personal income taxes. You will
     receive this interest at the end of each
     of the years in which they mature.
</TABLE>

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

12.  WHAT OTHER SERVICES ARE AVAILABLE?

     REINVESTMENT
     You will receive your monthly income in
     cash unless you choose to compound your
     income by reinvesting at no sales fee in
     the Corporate Fund Investment
     Accumulation Program, Inc. This program
     is an open-end mutual fund with a
     comparable investment objective, but
     those bonds are not insured. Income from
     this program will be subject to U.S.
     federal income taxes for both U.S. and
     foreign investors. FOR MORE COMPLETE
     INFORMATION ABOUT THE PROGRAM, INCLUDING
     CHARGES AND FEES, ASK THE TRUSTEE FOR
     THE PROGRAM'S PROSPECTUS. READ IT
     CAREFULLY BEFORE YOU INVEST. THE TRUSTEE
     MUST RECEIVE YOUR WRITTEN ELECTION TO
     REINVEST AT LEAST 10 DAYS BEFORE THE
     RECORD DAY OF AN INCOME PAYMENT.

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

                                       5
<PAGE>
WHAT YOU CAN EXPECT FROM YOUR INVESTMENT

MONTHLY INCOME

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

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

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

RETURN FIGURES

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

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

<TABLE>
<S>              <C>  <C>
Estimated Annual         Estimated
Interest Income   -   Annual Expenses
-------------------------------------
             Unit Price
</TABLE>

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

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

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

RECORDS AND REPORTS

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

You may request:

- copies of bond evaluations to enable you to comply with federal and state tax
  reporting requirements; and

- audited financial statements of the Fund.

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

                                       6
<PAGE>
THE RISKS YOU FACE

INTEREST RATE RISK

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

CALL RISK

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

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

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

REDUCED DIVERSIFICATION RISK

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

LIQUIDITY RISK

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

CONCENTRATION RISK

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

Here is what you should know about the Fund's concentration in corporate utility
bonds, including telecommunications bonds:
  - payment for these bonds depends on rates that the utility companies may
    charge, the demand for their services and their operating costs;
  - electric utilities face pressure to keep rates low, which may make it
    difficult to recover investments in generating plant;
  - utilities generally are sensitive to costs and availability of fuel;
  - some electric utilities are subject to the risks of the nuclear industry;
  - telecommunications companies are extensively regulated and the industry is
    increasingly competitive; and
  - the rate of technological innovation has a major impact on
    telecommunications companies.

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

BOND QUALITY RISK

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

INSURANCE RELATED RISK

The bonds are backed by MBIA Insurance Corporation as long as they remain in the
Fund. Insurance policies generally make payments only according to a bond's
original payment schedule and do not make early

                                       7
<PAGE>
payments when a bond defaults or becomes taxable. Although the federal
government does not regulate the insurance business, various state laws and
federal initiatives and tax law changes could significantly affect the insurance
business. The claims-paying ability of MBIA is rated AAA by Standard & Poor's.
Insurance company ratings are subject to change at any time at the discretion of
the rating agencies.

LITIGATION RISK

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

SELLING OR EXCHANGING UNITS

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

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

If you sell your units before the final deferred sales fee installment, the
amount of any remaining installments will be deducted from your proceeds.

SPONSORS' SECONDARY MARKET

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

We have maintained a secondary market continuously for over 28 years, but we
could discontinue it without prior notice for any business reason.

SELLING UNITS TO THE TRUSTEE

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

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

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

                                       8
<PAGE>
do so. In that case, you will receive the net proceeds of the sale.

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

If you acquire 25% or more of the outstanding units of the Fund and you sell
units with a value exceeding $250,000, the Trustee may choose to pay you "in
kind" by distributing bonds and cash with a total value equal to the price of
those units. The Trustee will try to distribute bonds in the portfolio pro rata,
but it reserves the right to distribute only one or a few bonds. The Trustee
will act as your agent in an in kind distribution and will either hold the bonds
for your account or sell them as you instruct. You must pay any transaction
costs as well as transfer and ongoing custodial fees on sales of bonds
distributed in kind.

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

EXCHANGE OPTION

You may exchange units of certain Defined Asset Funds for units of this Fund at
a maximum exchange fee of 2.50%. You may exchange units of this Fund for units
of certain other funds at a reduced sales fee if your investment goals change.
To exchange units, you should talk to your financial professional about what
funds are exchangeable, suitable and currently available.

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

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

HOW THE FUND WORKS

PRICING

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

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

In addition, as with mutual funds, the Fund (and therefore the investors) pay
all or some of the costs of organizing the Fund including:
  - cost of initial preparation of legal documents;

                                       9
<PAGE>
  - federal and state registration fees;
  - initial fees and expenses of the Trustee;
  - initial audit; and
  - legal expenses and other out-of-pocket expenses.

EVALUATIONS

An independent Evaluator values the bonds on each business day (excluding
Saturdays, Sundays and the following holidays as observed by the New York Stock
Exchange: New Year's Day, Presidents' Day, Martin Luther King, Jr. Day, Good
Friday, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas).
Bond values are based on current bid or offer prices for the bonds or comparable
bonds. In the past, the difference between bid and offer prices of publicly
offered bonds has ranged from 0.25% of face amount on actively traded issues to
1.5% on inactively traded issues; the difference has averaged between 0.5% and
1%.

INCOME

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

EXPENSES

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

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

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

Any quarterly deferred sales charges you owe are paid with interest and
principal from certain bonds. If these amounts are not enough, the rest will be
paid out of distributions to you from the Fund's Capital and Income Accounts.

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

                                       10
<PAGE>
of Fund expenses and may sell bonds if cash is not available.

PORTFOLIO CHANGES

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

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

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. Units offered in the secondary market may not
represent the same face amount of bonds that they did originally.

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

FUND TERMINATION

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

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

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

CERTIFICATES

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

TRUST INDENTURE

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

                                       11
<PAGE>
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 Evaluator may
resign or be removed by the Sponsors and the Trustee without the consent of
investors. The resignation or removal of either becomes effective when a
successor accepts appointment. The Sponsors will try to appoint a successor
promptly; however, if no successor has accepted within 30 days after notice of
resignation, the resigning Trustee or Evaluator may petition a court to appoint
a successor.

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

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

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

LEGAL OPINION

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

AUDITORS

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

SPONSORS

The Sponsors are:

MERRILL LYNCH, PIERCE, FENNER & SMITH INCORPORATED (a wholly-owned subsidiary of
Merrill Lynch & Co., Inc.)
P.O. Box 9051,
Princeton, NJ 08543-9051

SALOMON SMITH BARNEY INC. (an indirectly wholly-owned subsidiary of Citigroup
Inc.)
388 Greenwich Street--23rd Floor,
New York, NY 10013

                                       12
<PAGE>
DEAN WITTER REYNOLDS INC. (a principal operating subsidiary of Morgan Stanley
Dean Witter & Co.)
Two World Trade Center--59th Floor,
New York, NY 10048
PRUDENTIAL SECURITIES INCORPORATED (an
indirect wholly-owned subsidiary of the
Prudential Insurance Company of America)
One New York Plaza
New York, NY 10292

PAINEWEBBER INCORPORATED (a wholly-owned subsidiary of PaineWebber Group Inc.)
1285 Avenue of the Americas,
New York, NY 10019

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

TRUSTEE

The Chase Manhattan Bank, Unit Investment Trust Departament, 4 New York
Plaza--6th Floor, New York, New York 10004, is the Trustee. It 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. The Sponsors also
realized a profit or loss on the initial deposit of the bonds. Any cash made
available by you to the Sponsors before the settlement date for those units may
be used in the Sponsors' businesses to the extent permitted by federal law and
may benefit the Sponsors.

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

In maintaining a secondary market, the Sponsors will also realize profits or
sustain losses in the amount of any difference between the prices at which they
buy units and the prices at which they resell or redeem them.

PUBLIC DISTRIBUTION

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

CODE OF ETHICS

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

                                       13
<PAGE>
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 the Portfolio. We cannot
predict whether any impact will be material to the Fund as a whole.

TAXES

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

In the opinion of our counsel, under existing law:

GENERAL TREATMENT OF THE FUND AND YOUR INVESTMENT

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

GAIN OR LOSS UPON DISPOSITION

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

If your net long-term capital gains exceed your net short-term capital losses,
the excess may be subject to tax at a lower rate than ordinary income. Any
capital gain from the Fund will be long-term if you are considered to have held
your investment on each bond for more than one year and short-term otherwise.
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 BONDS

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

EXPENSES

If you are an individual who itemizes deductions, you may deduct your share of
Fund expenses, but only to the extent that such amount, together with your other
miscellaneous deductions, exceeds 2% of your adjusted gross income. Your ability
to deduct Fund expenses will be limited further if your adjusted gross income
exceeds a specified amount, currently, $128,950 ($64,475 for a married person
filing separately).

                                       14
<PAGE>
FOREIGN INVESTORS

If you are a foreign investor and you are not engaged in a U.S. trade or
business, you generally will not be subject to U.S. federal income tax,
including withholding tax, on the interest or gain on a bond issued after July
18, 1984 if you meet certain requirements, including the certification of
foreign status and other matters. 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
about the types of bonds that may be in the Fund's portfolio, general risk
disclosure concerning any insurance securing certain bonds, and general
information about the structure and operation of the Fund. The supplemental
information is also available from the SEC.

                                       15

<PAGE>

          CORPORATE INCOME FUND,
          INSURED SERIES - 101,
          DEFINED ASSET FUNDS

          REPORT OF INDEPENDENT ACCOUNTANTS

          The Sponsors,  Trustee and Holders of Corporate  Income Fund,  Insured
          Series - 101, Defined Asset Funds:

          We have audited the  accompanying  statement of condition of Corporate
          Income Fund, Insured Series - 101, Defined Asset Funds,  including the
          portfolio,  as of  February  29, 2000 and the  related  statements  of
          operations  and of changes in net assets for the period August 1, 1999
          to  February  29,  2000 and and the year ended  July 31,  1999 and the
          period August 29, 1997 to July 31, 1998.  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  auditing   standards
          generally  accepted in the United States of America.  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 February  29, 2000,  as shown in such  portfolio,
          were  confirmed to us by The Chase  Manhattan  Bank,  the Trustee.  An
          audit also  includes  assessing  the  accounting  principles  used and
          significant  estimates made by the Trustee,  as well as evaluating the
          overall financial statement  presentation.  We believe that our audits
          provide a reasonable basis for our opinion.

          In our opinion,  the  financial  statements  referred to above present
          fairly, in all material respects,  the financial position of Corporate
          Income Fund, Insured Series - 101, Defined Asset Funds at February 29,
          2000 and the results of its  operations  and changes in its net assets
          for the above-stated periods in accordance with accounting  principles
          generally accepted in the United States of America.


          DELOITTE & TOUCHE LLP


          New York, N.Y.
          May 30, 2000


                                     D - 1.
<PAGE>

     CORPORATE INCOME FUND,
     INSURED SERIES - 101,
     DEFINED ASSET FUNDS


     STATEMENT OF CONDITION
     As of February 29, 2000

<TABLE>
     <S>                                                                                <C>             <C>
     TRUST PROPERTY:
       Investment in marketable securities -
          at value (cost $ 28,367,404) (Note 1)........                                                 $25,107,642
       Accrued interest ...............................                                                     609,614
       Accrued interest on Segregated
         Bonds (Note 5) ...............................                                                       1,592
       Principal payments receivable ..................                                                   1,027,279
       Income payments receivable (Segregated Bond) ...                                                          79
       Prepaid Trustee's fees and expenses ...........                                                        7,094
       Cash - income on Segregated Bonds ..............                                                       8,597
       Cash - principal ...............................                                                     408,817
       Deferred organization costs (Note 6) ...........                                                      21,470
                                                                                                        -----------
         Total trust property .........................                                                  27,192,184


     LESS LIABILITIES:
       Income advance from Trustee.....................                                 $   505,858
       Income payments payable (Segregated Bonds) .....                                       3,819
       Principal payments payable .....................                                   1,096,968
       Principal payments payable (Segregated Bonds) ..                                       5,074
       Deferred sales charge (Note 5) .................                                     193,864
       Accrued Sponsors' fees .........................                                       2,802
       Other liabilities (Note 6) .....................                                      21,470       1,829,855
                                                                                        -----------     -----------


     NET ASSETS, REPRESENTED BY:
       28,357 units of fractional undivided
          interest outstanding (Note 3)................                                  25,254,281

       Undistributed net investment income ............                                     108,048     $25,362,329
                                                                                        -----------     ===========

     UNIT VALUE ($ 25,362,329 / 28,357 units ).........                                                 $    894.39
                                                                                                        ===========
</TABLE>

                       See Notes to Financial Statements.


                                     D - 2.
<PAGE>

     CORPORATE INCOME FUND,
     INSURED SERIES - 101,
     DEFINED ASSET FUNDS


     STATEMENTS OF OPERATIONS

<TABLE>
<CAPTION>
                                                                  August 1, 1999      Year Ended      August 29, 1997
                                                                        to             July 31,              to
                                                                 February 29, 2000       1999          July 31, 1998
                                                                        ----             ----               ----
     <S>                                                                                                <C>
     INVESTMENT INCOME:
       Interest income ........................                    $ 1,277,883       $ 2,593,286        $ 1,938,158
       Interest income on Segregated
         Bonds (Note 5) ......................                          23,900            75,526             75,972
       Trustee's fees and expenses ............                        (25,464)          (47,162)           (38,099)
       Insurance expense ......................                        (34,884)          (72,976)           (55,344)
       Sponsors' fees .........................                        (11,380)          (17,787)           (11,768)
                                                                 ---------------------------------------------------
       Net investment income ..................                      1,230,055         2,530,887          1,908,919
                                                                 ---------------------------------------------------


     REALIZED AND UNREALIZED GAIN (LOSS)
       ON INVESTMENTS:
       Realized gain (loss) on
         securities sold or redeemed ..........                       (418,038)          125,179             93,071
       Unrealized appreciation (depreciation)
         of investments .......................                       (735,909)       (3,383,797)           859,944
                                                                 ---------------------------------------------------
       Net realized and unrealized
          gain (loss) on investments ..........                     (1,153,947)       (3,258,618)           953,015
                                                                 ---------------------------------------------------


     NET INCREASE (DECREASE) IN NET ASSETS
       RESULTING FROM OPERATIONS ..............                    $    76,108       $  (727,731)       $ 2,861,934
                                                                 ===================================================
</TABLE>

                       See Notes to Financial Statements.


                                     D - 3.
<PAGE>

     CORPORATE INCOME FUND,
     INSURED SERIES - 101,
     DEFINED ASSET FUNDS

     STATEMENTS OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
                                                                 August 1, 1999       Year Ended      August 29, 1997
                                                                       to              July 31,              to
                                                               February 29, 2000         1999          July 31, 1998
                                                                      ----               ----               ----
<S>                                                             <C>                 <C>                 <C>
     OPERATIONS:
       Net investment income ..................                 $  1,230,055        $  2,530,887        $ 1,908,919
       Realized gain (loss) on
         securities sold or redeemed ..........                     (418,038)            125,179             93,071
       Unrealized appreciation (depreciation
         of investments........................                     (735,909)         (3,383,797)           859,944
                                                               -----------------------------------------------------
       Net increase (decrease) in net assets
         resulting from operations ............                       76,108            (727,731)         2,861,934
                                                               -----------------------------------------------------
     DISTRIBUTIONS TO HOLDERS (Note 2):
       Income .................................                   (1,211,170)         (2,465,754)        (1,802,130)
       Principal ..............................                      (35,244)               (382)
       Income on Segregated Bonds .............                      (56,021)            (97,016)           (13,116)
       Principal on Segregated Bonds ..........                                                             (13,176)
                                                               -----------------------------------------------------
       Total Distributions ....................                   (1,302,435)         (2,563,152)        (1,828,422)
                                                               -----------------------------------------------------
     SHARE TRANSACTIONS:
       Subscription amounts ...................                                                          38,188,152
       Deferred sales charge
         principal (Note 5) ...................                    (421,823)            (776,280)          (501,900)
       Redemption amounts:
         Income ...............................                     (16,768)             (16,300)            (6,810)
         Income on Segregated Bonds ...........                      (5,119)              (7,674)            (3,027)
         Principal ............................                  (4,883,077)          (6,529,657)        (2,225,414)
                                                               -----------------------------------------------------
       Net share transactions .................                  (5,326,787)          (7,329,911)        35,451,001
                                                               -----------------------------------------------------

     NET INCREASE (DECREASE) IN NET ASSETS ....                  (6,553,114)         (10,620,794)        36,484,513
     NET ASSETS AT BEGINNING OF PERIOD ........                  31,915,443           42,536,237          6,051,724
                                                               -----------------------------------------------------
     NET ASSETS AT END OF PERIOD ..............                 $25,362,329         $ 31,915,443        $42,536,237
                                                               =====================================================
     PER UNIT:
       Income distributions during period .....                 $     38.28         $      66.08        $     57.22
                                                               =====================================================
       Principal distributions during period...                                     $       1.13                .01
                                                                                    ================================
       Income distributions on Segregated
         Bonds during period ..................                 $      1.82         $       2.56        $       .72
                                                               =====================================================
       Principal distributions on Segregated
         Bonds during period ..................                                                         $       .31
                                                                                                         ===========
       Net asset value at end of period .......                 $    894.39         $     943.13        $  1,055.28
                                                               =====================================================
     TRUST UNITS:
       Issued during period ...................                                                              36,432
       Redeemed during period .................                       5,483                6,468              2,196
       Outstanding at end of period ...........                      28,357               33,840             40,308
                                                               =====================================================
</TABLE>

                       See Notes to Financial Statements.


                                     D - 4.
<PAGE>

          CORPORATE INCOME FUND,
          INSURED SERIES - 101,
          DEFINED ASSET FUNDS

          NOTES TO FINANCIAL STATEMENTS

     1.   SIGNIFICANT ACCOUNTING POLICIES

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

            (A)   Securities are stated at value as determined by the Evaluator
                  based on bid side evaluations for the securities except that
                  value on August 29, 1997 was based upon offering side
                  evaluations at August 27, 1997, the day prior to the Date of
                  Deposit. Cost of securities at August 29, 1997 was also based
                  on such offering side evaluations. Cost of securities
                  purchased subsequent to the initial Date of Deposit is based
                  on the offering side evaluations on those dates. Realized
                  gains and losses on the securities are determined using the
                  first-in, first-out method.

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

            (C)   Interest income is recorded as earned.

     2.   DISTRIBUTIONS

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

     3.   NET CAPITAL

<TABLE>
     <S>                                                                                                <C>
          Cost of 28,357 units at Date of Deposit ....................                                  $29,409,217
          Transfer to capital of interest on Segregated Bonds (Note 5)                                      201,601
          Redemptions of units - net cost of 14,147 units redeemed
            less redemption amounts (principal).......................                                    1,033,791
          Income on Segregated Bonds paid upon redemption ............                                      (15,820)
          Income distributions on Segregated Bonds ...................                                     (166,153)
          Principal distributions ....................................                                      (35,626)
          Principal distribution on Segregated Bonds .................                                      (13,176)
          Deferred sales charge (Note 5) .............................                                   (1,700,003)
          Realized loss on securities sold or redeemed ...............                                     (199,788)
          Unrealized depreciation of investments .....................                                   (3,259,762)
                                                                                                        -----------
          Net capital applicable to Holders ..........................                                  $25,254,281
                                                                                                        ===========
</TABLE>

     4.   INCOME TAXES

          As of February 29, 2000, unrealized depreciation of investments, based
          on cost for Federal income tax purposes, aggregated $3,259,762, all of
          which  related  to  depreciated  securities.  The  cost of  investment
          securities for Federal income tax purposes was $28,367,404 at February
          29, 2000.


                                     D - 5.
<PAGE>

          CORPORATE INCOME FUND,
          INSURED SERIES - 101,
          DEFINED ASSET FUNDS

          NOTES TO FINANCIAL STATEMENTS


     5.   DEFERRED SALES CHARGE

          $ 644,000  face  amount  of United  States  Treasury  Notes  have been
          segregated to fund the deferred sales  charges.  The sales charges are
          being paid for by periodic  sales or maturity of these bonds,  as well
          as the proceeds  received in conjunction  with the  disposition of the
          unsegregated  bonds in the  portfolio.  A deferred  sales  charge of $
          15.00  per  Unit is  charged  each  year,  and  paid  to the  Sponsors
          periodically  by  the  Trustee  on  behalf  of the  Holders,  up to an
          aggregate of $45.00 per unit over the first three years of the life of
          the Fund.  Should a Holder redeem units prior to the third anniversary
          of the Fund,  the remaining  balance of the deferred sales charge will
          be charged.

     6.   DEFERRED ORGANIZATION COSTS

          Deferred  organization  costs are  being  amortized  over five  years.
          Included in "Other  liabilities"  on the  Statement  of  Condition  is
          $21,470 payable to the Trustee for  reimbursement  of costs related to
          the organization of the Trust.


                                     D - 6.
<PAGE>

     CORPORATE INCOME FUND,
     INSURED SERIES - 101,
     DEFINED ASSET FUNDS

     PORTFOLIO
     As of February 29, 2000

<TABLE>
<CAPTION>
                                   Rating of Issues(1)(5)
                                   ----------------------
                                              Standard
                                   Moody's    & Poor's                                          Optional
     Portfolio No. and Title of    Investors  Corpora-     Face                                Redemption
            Securities             Service    tion        Amount     Coupon     Maturities(3) Provisions(3)   Cost(2)    Value(2)
            ----------             --------- --------- ----------- -----------  ------------- ------------- ----------- -----------
<S>                               <C>        <C>        <C>         <C>           <C>          <C>          <C>         <C>
   1 BellSouth Telecommunications,   Aa2        AAA     $ 1,085,000     7.500 %      2033      06/15/03     $ 1,126,694 $ 1,001,552
     Debentures                                                                                @  104.750

   2 New York Telephone Company,     A2         A+        3,215,000     7.250        2024      02/15/04       3,249,284   2,870,976
     Debentures                                                                                @  103.060

   3 Pacific Gas & Electric          A1         AA-       6,110,000     6.750        2023      12/01/03       5,960,812   5,234,938
     Company, First and Refunding                                                              @  102.740
     Mortgage Bonds, Ser. 93-F

   4 Public Service Electric and     A3         A-        2,395,000     7.000        2024      09/01/03       2,370,256   2,124,286
     Gas Company, First and                                                                    @  102.740
     Refunding Mortgage Bonds,
     Ser. SS

   5 SBC Communications Inc.,        Aa3        AA          270,000     7.125        2026      None             284,456     248,986
     Debentures

   6 Southwestern Bell Telephone,    Aa2        AA        3,500,000     7.250        2025      07/15/03       3,576,470   3,191,412
     Debentures                                                                                @  102.860

   7 Texas Utilities, First          A3         BBB+      1,245,000     7.375        2025      10/01/03       1,251,528   1,114,823
     Mortgage Bonds                                                                            @  103.350

   8 US West Communications          A2         A         6,850,000     6.875        2033      09/15/03       6,525,627   5,707,057
     Company, Debentures                                                                       @  101.950

   9 Virginia Electric Power,        A2         A         3,500,000     6.750        2023      10/01/03       3,373,030   2,969,813
     First Refunding Mortgage                                                                  @  102.770
     Bonds, Ser. G

  10 United States Treasury          Aaa        AAA         644,000     6.000        2000      None             649,247     643,799
     Notes (4)

                                                        -----------                                          ----------  ----------
     TOTAL                                              $28,814,000                                         $28,367,404 $25,107,642
                                                        ===========                                          ==========  ==========
</TABLE>

                             See Notes to Portfolio.


                                      D - 7
<PAGE>

     CORPORATE INCOME FUND,
     INSURED SERIES - 101,
     DEFINED ASSET FUNDS

     NOTES TO PORTFOLIO
     As of February 29, 2000

    (1)   "NR", if  applicable,  indicates that this security is not currently .
          rated  by the  indicated  rating  service.  These  ratings  have  been
          furnished by the Evaluator but not confirmed with the rating agencies.

    (2)   See Notes to Financial Statements.

    (3)   Optional redemption provisions,  which may be exercised in whole or in
          part, are initially at prices of par plus a premium, then subsequently
          at  prices  declining  to par.  Certain  securities  may  provide  for
          redemption  at par prior or in addition to any  optional or  mandatory
          redemption dates or maturity, for example,  through the operation of a
          maintenance and replacement  fund, if proceeds are not able to be used
          as  contemplated,  the project is  condemned or sold or the project is
          destroyed  and insurance  proceeds are used to redeem the  securities.
          Many of the  securities  are also  subject to  mandatory  sinking fund
          redemption commencing on dates which may be prior to the date on which
          securities may be optionally redeemed. Sinking fund redemptions are at
          par and redeem  only part of the issue.  Some of the  securities  have
          mandatory sinking funds which contain optional  provisions  permitting
          the issuer to increase the principal amount of securities  called on a
          mandatory  redemption date. The sinking fund redemptions with optional
          provisions  may, and optional  refunding  redemptions  generally will,
          occur at times when the  redeemed  securities  have an  offering  side
          evaluation which represents a premium over par. To the extent that the
          securities were acquired at a price higher than the redemption  price,
          this will  represent a loss of capital when  compared  with the Public
          Offering  Price  of  the  Units  when  acquired.   Distributions  will
          generally be reduced by the amount of the income which would otherwise
          have been paid with respect to redeemed  securities  and there will be
          distributed  to Holders any principal  amount and premium  received on
          such  redemption  after  satisfying any redemption  requests for Units
          received by the Fund. The estimated  current return may be affected by
          redemptions.

    (4) These bonds have been segregated to fund the deferred sales charges.


    (5)   Insured  by AAA - rated  insurance  companies  that  guarantee  timely
          payments of principal and interest on the bonds (but not Fund units or
          the market value of the bonds before they mature).


                                     D - 8.
<PAGE>
DEFINED ASSET FUNDS--REGISTERED TRADEMARK--

<TABLE>
<S>                                      <C>
HAVE QUESTIONS ?                         CORPORATE INCOME FUND
Request the most recent free             INSURED SERIES--101
Information Supplement                   (A Unit Investment Trust)
that gives more details about            ---------------------------------------
the Fund, by calling:                    This Prospectus does not contain
The Chase Manhattan Bank                 complete information about the
1-800-323-1508                           investment company filed with the
                                         Securities and Exchange Commission in
                                         Washington, D.C. under the:
                                         - Securities Act of 1933 (file no.
                                         333-21527) and
                                         - Investment Company Act of 1940 (file
                                         no. 811-2295).
                                         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.
                                                                     11321--6/00
</TABLE>



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