MERRILL LYNCH & CO INC, 424B5, 1998-07-27

MERRILL LYNCH & CO INC
424B5, 1998-07-27
SECURITY BROKERS, DEALERS & FLOTATION COMPANIES

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<PAGE>

RULE NO. 424(b)(5)
REGISTRATION NO. 333-44173

Prospectus Supplement dated July 24, 1998
(To Prospectus Supplement dated July 24, 1998,
and Prospectus dated January 29, 1998)

[LOGO] Merrill Lynch

Protected Growth SM Investing
Pursuit of Growth, Protection of Principal

Merrill Lynch
EuroFund

MITTS(R)

Combining 100% Principal Protection
With Fund-Linked Participation

UPSIDE POTENTIAL: Based on the Performance of the EuroFund Index

Delivery of this brochure without an attached Prospectus and Prospectus
Supplement which provides a description of the MITTS Securities and the issuer,
including details on the risks associated with an investment in MITTS
Securities, is not authorized.
<PAGE>

Merrill Lynch EuroFund MITTS Features

The Merrill Lynch EuroFund Market Index Target-Term Securities SM (the "MITTS
Securities") combine protection of principal with participation in the potential
appreciation of an index based upon the performance of a mutual fund--the
Merrill Lynch EuroFund. The MITTS Securities offered hereby are senior debt
securities of Merrill Lynch & Co., Inc.

The Merrill Lynch EuroFund

The Merrill Lynch EuroFund ("EuroFund") is a mutual fund that seeks capital
appreciation primarily through investment in equities of corporations domiciled
in European countries. We have attached a prospectus for the shares of the
EuroFund that provides more information about the EuroFund.

The EuroFund Index

The return on the MITTS Securities at maturity is indexed to the performance of
the "EuroFund Index." The EuroFund Index will be calculated by the American
Stock Exchange ("AMEX") and will measure the total return of Class B shares of
the EuroFund, which reflects the change in price of Class B shares of the
EuroFund plus a reinvestment of cash dividends and distributions on such shares,
as reduced by an adjustment factor expected to be between 2.50% and 2.75% of the
value of the EuroFund Index each year. The value of the EuroFund Index, as
adjusted, will be published by the AMEX under the symbol "EFI."

These MITTS Securities Offer Investors:

. Principal Protection: The principal amount of the MITTS Securities (i.e., $10
per unit) will be paid through the delivery of Class D Shares of the EuroFund
to the investor at maturity.

. Intermediate Term: The MITTS Securities will mature approximately 7H years
from their date of issue.

. Participation in the Potential Appreciation of the EuroFund Index: Investors
will receive the percentage increase, if any, of the EuroFund Index as
calculated and published by the AMEX under the symbol "EFI."

. Senior Debt Securities: The MITTS Securities are non-callable senior debt
securities of Merrill Lynch & Co., Inc.

. AMEX Listing: Application will be made to list the MITTS Securities on the
AMEX under the symbol "EFM."

. Certain Risk Considerations: Like all investments, the MITTS Securities
offered hereby carry certain investment risks. Application will be made to
list the MITTS Securities offered hereby on the AMEX. You should be aware that
the listing of the MITTS Securities on the AMEX will not necessarily ensure
that a liquid trading market will be available for the MITTS
<PAGE>

Securities. Furthermore, the price that an investor receives for MITTS
Securities prior to maturity may be more or less than their original cost
depending on interest rates, time remaining until maturity, the value and
volatility of the EuroFund Index, the creditworthiness of Merrill Lynch & Co.,
Inc. and other factors described in the Prospectus Supplement.

How Do the MITTS Securities Work?

The following questions and answers are designed to give you a basic
understanding of the EuroFund MITTS and their payment characteristics at
maturity. The questions and answers must be read in conjunction with the
attached Prospectus and Prospectus Supplement, which contain a more detailed
description of the MITTS Securities offered hereby as well as a discussion of
risk factors and other special considerations.

How Much Do the MITTS Securities Pay at Maturity?

At maturity, you will receive a payment on the MITTS Securities equal to the sum
of two amounts: the Principal Amount and the Supplemental Redemption Amount.

[Principal Amount] + [Supplemental Redemption = [MITTS Payment
Amount (IF ANY)] at Maturity]

. The Principal Amount per unit of MITTS Securities is $10. As the principal
amount equals the initial public offering price, the MITTS Securities offered
hereby are designed to return 100% of your investment at maturity.

. The Supplemental Redemption Amount is an additional payment that may be made
at maturity, the amount of which depends upon the performance of the EuroFund
Index. The Supplemental Redemption Amount may be zero, but will not be less
than zero.

What Must Happen for Me to Receive a Supplemental Redemption Amount?

The Supplemental Redemption Amount paid at maturity, if any, will be based on
the percentage increase in the EuroFund Index beyond the Starting Index Value.

. The Starting Index Value of the EuroFund Index will be set to equal the Net
Asset Value of the Class B shares of the EuroFund on the date the MITTS
Securities are priced for initial sale to the public. If the value of the
EuroFund Index at maturity is greater than the Starting Index Value, you will
receive a Supplemental Redemption Amount per $10 unit of MITTS Securities
equal to:

$10 x Ending Index Value - Starting Index Value
-----------------------------------------
Starting Index Value

The Ending Index Value will equal the value of the EuroFund Index on a day
shortly prior to the stated maturity date of the MITTS Securities.
<PAGE>

How Is Payment Made at Maturity?

[MAP]

At maturity, the Principal Amount plus the Supplemental Redemption Amount, if
any, will not be paid in cash but, rather, in Class D shares of the EuroFund.
The payment due at maturity of the MITTS Securities will be paid by the delivery
of the number of Class D shares of the EuroFund equal in value to the Principal
Amount plus the Supplemental Redemption Amount, if any, based on the net asset
value of Class D shares of the EuroFund on a date shortly prior to the stated
maturity date of the MITTS Securities. Although you will not be charged any
sales charge or distribution fee when we deliver Class D shares at maturity, you
will be subject to ongoing account maintenance fees with respect to such Class D
shares so long as you hold such Class D shares. The EuroFund does not impose a
penalty or redemption charge in connection with a redemption of Class D shares.

Hypothetical Historical Data on the EuroFund Index

The following graph sets forth the hypothetical historical performance of the
EuroFund Index at the end of each June and December from January 1987 through
June 1998. All historical data presented in the following graph were calculated
as if the EuroFund Index had existed during such periods. The hypothetical
historical month-end value of the EuroFund Index was set to 10 on January 31,
1987, which was the net asset value of Class B shares of the EuroFund on such
date, to provide an illustration of past movements of the historical month-end
closing levels. The Starting Index Value will be set to the net asset value of
Class B shares of the EuroFund on the date the MITTS Securities are priced for
initial sale to the public. For purposes of calculating the following
hypothetical historical data, we have assumed the EuroFund was reduced by 2.625%
(the midpoint of the offering range of 2.50% to 2.75%) of its value each year
and have assumed a reinvestment of dividends and distributions at the end of the
month in which they were paid. These hypothetical historical data on the
EuroFund Index are not necessarily indicative of future performance of the
EuroFund Index or what the value of the MITTS Securities may be. Any historical
upward or downward trend in the level of the EuroFund Index during any period
set forth below is not any indication that the EuroFund Index is more or less
likely to increase or decrease at any time during the term of the MITTS
Securities.

LINE GRAPH
<PAGE>

SUBJECT TO COMPLETION
PRELIMINARY PROSPECTUS SUPPLEMENT, DATED JULY 24, 1998

PROSPECTUS SUPPLEMENT
(TO PROSPECTUS DATED JANUARY 29, 1998)
[LOGO] MERRILL LYNCH
PROTECTED GROWTH SM INVESTING
PURSUIT OF GROWTH, PROTECTION OF PRINCIPAL

2,500,000 UNITS
MERRILL LYNCH & CO., INC.

MERRILL LYNCH EUROFUND MARKET INDEX TARGET-TERM SECURITIES SM DUE FEBRUARY ,
2006
("MITTS(R) SECURITIES")
($10 PRINCIPAL AMOUNT PER UNIT)
GENERAL:
. 100% principal protection at maturity ($10 per Unit)

. No payments prior to the stated maturity date

. Senior unsecured debt securities of Merrill Lynch & Co., Inc.

. Application will be made to have the MITTS(R) Securities listed
on the American Stock Exchange ("AMEX") under the symbol "EFM"

PAYMENT AT
MATURITY:
. Principal Amount + Supplemental Redemption Amount

. The Supplemental Redemption Amount will be based on the
percentage increase, if any, in the total return value of Class
B Shares of the Merrill Lynch EuroFund, a registered mutual
fund (the "EuroFund"), adjusted as described below (the
"EuroFund Index"). The Supplemental Redemption Amount may be
ZERO, but will not be less than zero.

. Merrill Lynch & Co., Inc. intends to pay and discharge each
MITTS(R) Security by delivering the number of Class D Shares of
the Merrill Lynch EuroFund equal in value to the Principal
Amount plus the Supplemental Redemption Amount, if any, based
on a market price for Class D Shares shortly prior to the
stated maturity of the MITTS(R) Securities.

EUROFUND
INDEX:
. The EuroFund Index measures the total return of Class B Shares
of the EuroFund, which reflects the change in price of Class B
Shares plus a reinvestment of cash dividends and distributions
paid on Class B Shares of the EuroFund, as reduced by an
adjustment factor expected to be between 2.50% and 2.75% of the
value of the EuroFund Index each year. We will determine the
final adjustment factor on the Pricing Date and it will appear
in the final Prospectus Supplement. Such annual reduction will
be applied on a pro rata basis each calendar day to calculate
the value of the EuroFund Index.

. We have attached a prospectus for the shares of the EuroFund
that describes the operation and management of the EuroFund,
the Class B Shares reflected in the EuroFund Index, the Class D
Shares of the EuroFund which you will receive upon maturity of
the MITTS(R) Securities and the risks related to an investment
in the EuroFund. Although advised by an affiliate of Merrill
Lynch & Co., Inc., the EuroFund is not otherwise affiliated
with Merrill Lynch & Co., Inc. and will not receive any of the
proceeds from the sale of the MITTS(R) Securities or have any
obligations with respect to the MITTS(R) Securities.

BEFORE YOU DECIDE TO INVEST IN THE MITTS(R) SECURITIES, CAREFULLY READ THIS
PROSPECTUS SUPPLEMENT AND PROSPECTUS, ESPECIALLY THE RISK FACTORS BEGINNING ON
PAGE S-8.

Neither the SEC nor any state securities commission has approved these
MITTS(R) Securities or passed upon the adequacy of this Prospectus Supplement
or the attached Prospectus. Any representation to the contrary is a criminal
offense.

<TABLE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<CAPTION>
INITIAL PUBLIC UNDERWRITING PROCEEDS TO
OFFERING PRICE(1) DISCOUNT(1) COMPANY(2)
- --------------------------------------------------------------------------------
<S> <C> <C> <C>
Per Unit............................. $10.00 $ $
- --------------------------------------------------------------------------------
Total................................ $25,000,000 $ $
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
</TABLE>
(1) The "Initial Public Offering Price" and "Underwriting Discount" for any
single transaction to purchase 500,000 Units or more will be $ per Unit
and $ per Unit, respectively.
(2) Before deduction of expenses payable by the Company.

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

We expect that the MITTS(R) Securities will be ready for delivery in book-
entry form only through the facilities of DTC on or about August , 1998.

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

MERRILL LYNCH & CO.

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

The date of this Prospectus Supplement is August , 1998.

- -------
"MITTS" is a registered service mark and "Market Index Target-Term Securities"
is a service mark owned by Merrill Lynch & Co., Inc.
<PAGE>

STABILIZATION

Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S") as underwriter
may engage in transactions that stabilize, maintain or otherwise affect the
price of the MITTS Securities. Such transactions may include stabilizing and
the purchase of MITTS Securities to cover short positions. For a description
of these activities, see "Underwriting".

CONTENT OF PROSPECTUS

You should rely only on the information contained in this document or in
documents referenced herein that we have filed with the Securities and
Exchange Commission ("SEC"). We have not authorized anyone to provide you with
different information. You should not assume that the information in the
Prospectus or Prospectus Supplement is accurate as of any date other than the
date on the front of this document.

LIMITATIONS ON OFFERS OR SOLICITATIONS

We do not intend this document to be an offer or solicitation:

(A) if used in a jurisdiction in which such offer or solicitation is not
authorized;

(B) if the person making such offer or solicitation is not qualified to
do so; or

S-2
<PAGE>

TABLE OF CONTENTS

<TABLE>
<CAPTION>
PAGE
----
<S> <C>
SUMMARY INFORMATION-Q&A................................................... S-4
What are the MITTS Securities?.......................................... S-4
What will I receive at the stated maturity date of the MITTS
Securities?............................................................ S-4
What is the Merrill Lynch EuroFund?..................................... S-6
What does the EuroFund Index measure?................................... S-6
How has the EuroFund Index performed historically?...................... S-6
What about taxes?....................................................... S-6
Will the MITTS Securities or the EuroFund Index be listed on a stock
exchange?.............................................................. S-7
What is the role of our subsidiary, MLPF&S?............................. S-7
Can you tell me more about the Company?................................. S-7
Are there any risks associated with my investment?...................... S-7
WHERE YOU CAN FIND MORE INFORMATION....................................... S-8
The Company............................................................. S-8
The EuroFund............................................................ S-8
RISK FACTORS.............................................................. S-8
The Supplemental Redemption Amount...................................... S-8
Your yield on the MITTS Securities will not equal the yield on Class B
Shares................................................................. S-8
Your yield may be lower than the yield on a standard debt security of
comparable maturity.................................................... S-8
Uncertain trading market................................................ S-9
Factors affecting trading value of the MITTS Securities................. S-9
The EuroFund............................................................ S-10
No shareholder's rights................................................. S-10
State law limits on interest paid....................................... S-10
Purchases and sales by Merrill Lynch.................................... S-10
Potential conflicts..................................................... S-10
RATIO OF EARNINGS TO FIXED CHARGES........................................ S-11
DESCRIPTION OF THE MITTS SECURITIES....................................... S-11
General................................................................. S-11
</TABLE>
<TABLE>
<CAPTION>
PAGE
----
<S> <C>
Delivery at Maturity..................................................... S-11
Hypothetical Returns..................................................... S-13
Adjustments to the EuroFund Index........................................ S-13
Discontinuance of the EuroFund Index..................................... S-14
Events of Default and Acceleration....................................... S-14
Depositary............................................................... S-15
Same-Day Settlement and Delivery......................................... S-17
THE EUROFUND INDEX......................................................... S-17
Calculation of the EuroFund Index........................................ S-17
The EuroFund............................................................. S-17
Historical Data on the EuroFund Index.................................... S-19
CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS.................... S-20
General.................................................................. S-20
U.S. Holders............................................................. S-21
Hypothetical Table....................................................... S-23
Non-U.S. Holders......................................................... S-23
Backup Withholding....................................................... S-24
New Withholding Regulations.............................................. S-24
USE OF PROCEEDS............................................................ S-24
UNDERWRITING............................................................... S-25
VALIDITY OF THE MITTS SECURITIES........................................... S-25
INDEX OF DEFINED TERMS..................................................... S-26
</TABLE>

THE PROSPECTUS

<TABLE>
<S> <C>
AVAILABLE INFORMATION...................................................... 2
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE............................ 2
MERRILL LYNCH & CO., INC. ................................................. 3
USE OF PROCEEDS............................................................ 3
DESCRIPTION OF DEBT SECURITIES............................................. 4
DESCRIPTION OF DEBT WARRANTS............................................... 9
DESCRIPTION OF CURRENCY WARRANTS........................................... 10
DESCRIPTION OF INDEX WARRANTS.............................................. 12
DESCRIPTION OF PREFERRED STOCK............................................. 16
DESCRIPTION OF DEPOSITARY SHARES........................................... 21
DESCRIPTION OF PREFERRED STOCK WARRANTS.................................... 25
DESCRIPTION OF COMMON STOCK................................................ 27
DESCRIPTION OF COMMON STOCK WARRANTS....................................... 29
PLAN OF DISTRIBUTION....................................................... 31
EXPERTS.................................................................... 32
</TABLE>

S-3
<PAGE>

SUMMARY INFORMATION--Q&A

This summary includes questions and answers that highlight selected
information from the Prospectus and Prospectus Supplement to help you
understand the Merrill Lynch EuroFund Market Index Target-Term Securities SM
due February , 2006 (the "MITTS Securities"). You should carefully read the
Prospectus and Prospectus Supplement to understand fully the terms of the
MITTS Securities, the Merrill Lynch EuroFund Index (the "EuroFund Index") and
the tax and other considerations that are important to an investor in making a
decision about whether to invest in the MITTS Securities. You should, in
particular, carefully review the "Risk Factors" section, which highlights
certain risks associated with an investment in the MITTS Securities, to
determine whether an investment in the MITTS Securities is appropriate for
you.

We have attached the prospectus for the EuroFund (the "EuroFund
Prospectus"). You should carefully read the EuroFund Prospectus to fully
understand the operation and management of the EuroFund, particularly the
difference between fees associated with Class B Shares (which the EuroFund
Index measures) and Class D Shares (which we intend to deliver to you at
maturity). Although advised by an affiliate of the Company, the EuroFund is
not otherwise affiliated with the Company, will not receive any of the
proceeds from the sale of the MITTS Securities and will not have any
obligations with respect to the MITTS Securities. WE HAVE ATTACHED THE
EUROFUND PROSPECTUS AND ARE DELIVERING IT TO PROSPECTIVE PURCHASERS OF THE
MITTS SECURITIES TOGETHER WITH THIS PROSPECTUS SUPPLEMENT AND THE ACCOMPANYING
PROSPECTUS OF THE COMPANY FOR THE CONVENIENCE OF REFERENCE ONLY. THE EUROFUND
PROSPECTUS DOES NOT CONSTITUTE A PART OF THIS PROSPECTUS SUPPLEMENT OR THE
ACCOMPANYING PROSPECTUS OF THE COMPANY, NOR IS IT INCORPORATED BY REFERENCE
HEREIN OR THEREIN.

WHAT ARE THE MITTS SECURITIES?

The MITTS Securities are a series of senior debt securities issued by
Merrill Lynch & Co., Inc. (the "Company") and are not secured by collateral.
The MITTS Securities will rank equally with all other unsecured and
unsubordinated debt of the Company. The MITTS Securities will mature on
February , 2006 and do not provide for earlier redemption. You will not
receive any Class D Shares or any payments, on the MITTS Securities until
maturity.

Each "Unit" of MITTS Securities represents $10 principal amount of MITTS
Securities. You may transfer the MITTS Securities only in whole Units. You
will not have the right to receive physical certificates evidencing your
ownership except under limited circumstances. Instead, we will issue the MITTS
Securities in the form of a global certificate, which will be held by The
Depository Trust Company ("DTC"), or its nominee. Direct and indirect
participants in DTC will record beneficial ownership of the MITTS Securities
by individual investors. You should refer to the section "Description of the
MITTS Securities--Depositary" in this Prospectus Supplement.

WHAT WILL I RECEIVE AT THE STATED MATURITY DATE OF THE MITTS SECURITIES?

We have designed the MITTS Securities for investors who want to protect
their investment by receiving at least the principal amount of their
investment at maturity and who also want to participate in the price
appreciation of the Class B Shares of the EuroFund and distributions paid by
the EuroFund on Class B Shares (i.e., the "total return" of the Class B Shares
of the EuroFund), as measured by the EuroFund Index, an index published by the
AMEX under the symbol "EFI".

The AMEX will reduce the EuroFund Index by an adjustment factor expected to
be between 2.50% and 2.75% of the value of the EuroFund Index each year. Such
reduction will be applied to the value of the EuroFund Index on a daily basis
for the pro rata amount of such annual reduction. We will determine the final
adjustment factor on the date the MITTS Securities are priced for initial sale
to the public (the "Pricing Date") and it will appear in the final Prospectus
Supplement delivered to you in connection with sales of the MITTS Securities.

At maturity we will deliver to you the number of Class D Shares of the
EuroFund equal in value to the sum of two amounts: the "Principal Amount" and
the "Supplemental Redemption Amount". We will determine the number of Class D
Shares to be delivered to you based on the net asset value (i.e., the

S-4
<PAGE>

price) of the Class D Shares reported by the EuroFund shortly before the
stated maturity date of the MITTS Securities. If, however, the Class D Shares
of the EuroFund are not available for sale to new investors immediately prior
to the maturity date, any amounts due in respect of the MITTS Securities will
be paid in cash.

"Principal Amount"

The Principal Amount per Unit is $10.

"Supplemental Redemption Amount"

The Supplemental Redemption Amount per Unit will equal:

$10 X EIV - SIV
---------
SIV

but will not be less than zero.

EIV = Ending Index Value

SIV = Starting Index Value

"ENDING INDEX VALUE" means the closing value of the EuroFund Index on the
first Calculation Day during the Calculation Period.

"STARTING INDEX VALUE" means the value of the EuroFund Index on the date the
MITTS Securities are priced for initial sale to the public (the "Pricing
Date"). The value of the EuroFund Index on the Pricing Date will be set to
match the net asset value of the Class B Shares of the EuroFund determined and
published by the EuroFund as of approximately 15 minutes after the close of
business on the New York Stock Exchange ("NYSE") (generally, 4:00 p.m., New
York City time). We will disclose the Starting Index Value in the final form
of Prospectus Supplement delivered to you in connection with sales of the
MITTS Securities.

For more specific information about the Supplemental Redemption Amount,
please see the section "Description of the MITTS Securities" in this
Prospectus Supplement.

Examples

Here are two examples of Supplemental Redemption Amount calculations:

EXAMPLE 1--Ending Index Value is less than the Starting Index Value at
maturity:

Starting Index Value: 18.00
Ending Index Value: 10.80

<TABLE>
<S> <C>
SUPPLEMENTAL REDEMPTION AMOUNT (PER UNIT) = $10 X 10.80 - 18.00 = $0.00 (Supplemental
------------- Redemption
18.00 Amount cannot
be less than
zero)

TOTAL VALUE OF CLASS D SHARES DELIVERED AT MATURITY (PER UNIT) = $10 + $0 = $10
</TABLE>
EXAMPLE 2--Ending Index Value is greater than the Starting Index Value at
maturity:

Starting Index Value: 18.00
Ending Index Value: 25.20

SUPPLEMENTAL REDEMPTION AMOUNT (PER UNIT) = $10 X 25.20 - 18.00 = $4.00
18.00
<TABLE>
<S> <C>
TOTAL VALUE OF CLASS D SHARES DELIVERED AT MATURITY (PER UNIT) = $10 + $4.00 = $14.00
</TABLE>

S-5
<PAGE>

WHAT IS THE MERRILL LYNCH EUROFUND?

The EuroFund is a mutual fund that has announced that it seeks to provide
shareholders of the EuroFund with capital appreciation primarily through
investment in equities of corporations domiciled in European countries.

The EuroFund has four classes of shares representing ownership interests in
the EuroFund. Each class of shares has a different combination of sales
charges, ongoing fees and other features. The net asset value (i.e., price)
per share of the EuroFund is computed by dividing the sum of the market value
of the securities plus any cash or other assets held by the EuroFund minus all
liabilities of the EuroFund by the total number of shares outstanding at such
time. The net asset value of the various classes of shares will vary because
of the differing accrual of certain expenses, such as distribution expenses,
relating to each class of shares of the EuroFund. For example, buyers of Class
B Shares are not charged an initial sales charge when the Class B Shares are
purchased, but they are subject to an ongoing account maintenance fee and an
ongoing distribution fee. Buyers of Class D Shares incur an initial sales
charge when the Class D Shares are purchased and are subject to an ongoing
account maintenance fee. You will not be charged any sales charge or
distribution fee when we deliver Class D Shares to you in satisfaction of our
obligations under the MITTS Securities on the stated maturity date. Upon
delivery of the Class D Shares, you will become a shareholder of the EuroFund.
As a shareholder of the EuroFund, you will be subject to ongoing account
maintenance fees with respect to such Class D Shares so long as you hold such
Class D Shares. The EuroFund does not impose a penalty or redemption charge in
connection with a redemption of Class D Shares. The accompanying EuroFund
Prospectus describes the fees charged on each of the Class B and Class D
Shares in greater detail.

WHAT DOES THE EUROFUND INDEX MEASURE?

The EuroFund Index measures the change in the net asset value of Class B
Shares of the EuroFund plus a reinvestment of all cash dividends and
distributions paid by the EuroFund on Class B Shares as reduced on a "pro rata"
basis each day by an adjustment factor that will reduce the value of the
EuroFund Index by a percentage expected to be between 2.50% and 2.75% each
year.

The EuroFund generally distributes all of its net investment income, if any.
The EuroFund has announced that dividends from such net investment income will
be paid semi-annually and all realized net capital gains, if any, will be
distributed annually. The EuroFund has also announced that from time to time
the EuroFund may declare a special distribution (a "Tax Distribution") at or
about the end of a calendar year to comply with certain Federal tax
requirements.

The EuroFund Index will be calculated to include all cash dividend payments,
capital gains distributions, and Tax Distributions by assuming a reinvestment
of such dividends or distributions at the net asset value for Class B Shares
as of the close of business on the NYSE on the day that such dividends or
distributions are paid.

HOW HAS THE EUROFUND INDEX PERFORMED HISTORICALLY?

We have calculated the hypothetical values of the EuroFund Index on the last
business day of each month from January 1993 through June 1998 as if the
EuroFund Index had existed during such periods. We calculated these values on
the same basis that the EuroFund Index will be calculated in the future.

You can find a table with these values in the section "The EuroFund Index--
Historical Data on the EuroFund Index" in this Prospectus Supplement. We have
provided this historical information to help you evaluate the behavior of the
EuroFund Index in various past economic environments; however, such
hypothetical values based on prior performance of the EuroFund Index is not
necessarily indicative of how the EuroFund Index will perform in the future.

WHAT ABOUT TAXES?

Each year, you will be required to pay taxes on ordinary income from the
MITTS Securities over their term based upon an estimated yield for the MITTS
Securities, even though you will not receive any payments from us until
maturity. We have determined this estimated yield, in accordance with
regulations issued by the Treasury Department, solely in order for you to
figure the amount of taxes that you will owe each year as a result of owning a
Security. This amount is neither a prediction nor a guarantee of what the
actual Supplemental Redemption Amount will be, or that the actual Supplemental
Redemption Amount will even exceed zero. We have determined that this
estimated yield will equal % per annum (compounded semiannually).

S-6
<PAGE>

Based upon this estimated yield, if you pay your taxes on a calendar year
basis and if you buy a MITTS Security for $10 and hold the MITTS Security
until maturity, you will be required to pay taxes on the following amounts of
ordinary income from the MITTS Securities each year: $ in 1998, $ in 1999,
$ in 2000, $ in 2001, $ in 2002, $ in 2003, $ in 2004, $ in 2005
and $ in 2006. However, in 2006, the amount of ordinary income that you will
be required to pay taxes on from owning a MITTS Security may be greater or
less than $ , depending upon the Supplemental Redemption Amount, if any, you
receive. Also, if the Supplemental Redemption Amount is less than $ , you may
have a loss which you could deduct against other income you may have in 2006,
but under current tax regulations, you would neither be required nor permitted
to amend your tax returns for prior years. If you receive Class D Shares of
the EuroFund on the stated maturity date, your aggregate initial tax basis in
such Class D Shares of the EuroFund should be an amount equal to the sum of
$10 and the Supplemental Redemption Amount (less any cash received by you).
Your holding period for any Class D Shares of the EuroFund received by you on
the stated maturity date should begin on the day immediately following the
stated maturity date. For further information, see "Certain United States
Federal Income Tax Considerations" in this Prospectus Supplement.

WILL THE MITTS SECURITIES OR THE EUROFUND INDEX BE LISTED ON A STOCK EXCHANGE?

Application will be made to have the MITTS Securities listed on the AMEX
under the symbol "EFM". You should be aware that the listing of the MITTS
Securities on the AMEX will not necessarily ensure that a liquid trading
market will be available for the MITTS Securities. You should review "Risk
Factors--Uncertain trading market".

The AMEX will publish the EuroFund Index value under the symbol "EFI".

WHAT IS THE ROLE OF OUR SUBSIDIARY, MLPF&S?

Our subsidiary, MLPF&S, is the underwriter for the offering and sale of the
MITTS Securities. After the initial offering, MLPF&S intends to buy and sell
MITTS Securities to create a secondary market for holders of the MITTS
Securities, and may stabilize or maintain the market price of the MITTS
Securities during the initial distribution of the MITTS Securities. However,
MLPF&S will not be obligated to engage in any of these market activities, or
continue them once it has started.

MLPF&S will also be our agent (the "Calculation Agent") for purposes of
calculating the Ending Index Value and the Supplemental Redemption Amount.
Under certain circumstances, these duties could result in a conflict of
interest between MLPF&S's status as a subsidiary of the Company and its
responsibilities as Calculation Agent.

CAN YOU TELL ME MORE ABOUT THE COMPANY?

Merrill Lynch & Co., Inc. is a holding company with various subsidiary and
affiliated companies that provide investment, financing, insurance and related
services on a global basis. For information about the Company see the section
"Merrill Lynch & Co., Inc." in the Prospectus. You should also read the other
documents the Company has filed with the SEC, which you can find by referring
to the section "Where You Can Find More Information" in this Prospectus
Supplement.

ARE THERE ANY RISKS ASSOCIATED WITH MY INVESTMENT?

Yes, the MITTS Securities are subject to certain risks. Please refer to the
section "Risk Factors" in this Prospectus Supplement.

S-7
<PAGE>

WHERE YOU CAN FIND MORE INFORMATION

THE COMPANY

The Company files annual, quarterly and current reports, proxy statements
and other information with the SEC. Some of these documents are incorporated
by reference in, and form a part of, this Prospectus Supplement and the
Prospectus, as described in the section "Incorporation of Certain Documents by
Reference" in the Prospectus. You may read and copy any document we file by
visiting the SEC's public reference rooms in Washington, D.C. at 450 Fifth
Street, Room 1024, N.W., Washington, D.C., 20549; or at the SEC's regional
offices at 500 West Madison Street, Suite 400, Chicago, Illinois 60661-2511
and Seven World Trade Center, New York, New York 10048. Please call the SEC at
1-800-SEC-0330 for further information about the public reference rooms.
Copies of our SEC filings can also be obtained from the SEC's Internet web
site at http://www.sec.gov. You may also read copies of these documents at the
offices of the NYSE, the AMEX, the Chicago Stock Exchange, and the Pacific
Exchange.

We will send you copies of our SEC filings, excluding exhibits, at no cost
upon request. Please address your request to Lawrence M. Egan, Jr., Corporate
Secretary's Office, Merrill Lynch & Co., Inc., 100 Church Street, 12th Floor,
New York, New York 10080-6512; telephone number (212) 602-8439.

THE EUROFUND

The EuroFund is subject to the registration requirements of the Securities
Act of 1933, as amended, and the Investment Company Act of 1940, as amended.
Accordingly, the EuroFund files prospectuses, statements of additional
information, reports and other information with the SEC. Information provided
to or filed with the SEC by the EuroFund is available at the offices of the
SEC listed above and from the SEC's Internet web site referred to above. You
may also obtain copies of such documents at no cost by calling the EuroFund at
(609) 282-2800 or writing the EuroFund at: P.O. Box 9011, Princeton, New
Jersey 08543-9011. Such documents are not incorporated by reference herein,
and the Company makes no representation or warranty as to the accuracy or
completeness of such reports.

RISK FACTORS

Your investment in the MITTS Securities will involve certain risks. For
example, there is the risk that you might not earn a return on your
investment, and the risk that you will be unable to sell your MITTS Securities
prior to their maturity. You should carefully consider the following
discussion of risks before deciding whether an investment in the MITTS
Securities is suitable for you.

THE SUPPLEMENTAL REDEMPTION AMOUNT

You should be aware that if the Ending Index Value does not exceed the
Starting Index Value, the Supplemental Redemption Amount will be zero. This
will be true even if the value of the EuroFund Index was higher than the
Starting Index Value at some time during the life of the MITTS Securities but
subsequently falls below the Starting Index Value during the period in which
we calculate the Ending Index Value. If the Supplemental Redemption Amount is
zero, we will pay you only the Principal Amount of your MITTS Securities by
delivering, if available, a number of Class D Shares of the EuroFund in an
amount equal in value (determined based on the Maturity NAV) to such Principal
Amount.

YOUR YIELD ON THE MITTS SECURITIES WILL NOT EQUAL THE YIELD ON CLASS B SHARES

The yield you earn on the MITTS Securities, if any, will not be the same as
the yield that you would earn if you actually owned Class B Shares of the
EuroFund. In calculating the value of the EuroFund Index, the AMEX will deduct
an amount equal to between 2.50% and 2.75% of the value of the EuroFund Index
each year from the value of the EuroFund Index. Such annual reduction will be
applied to the value of the EuroFund Index on a "pro rata" basis each calendar
day. Because of such cumulative daily reductions, the value of the EuroFund
Index over time will increasingly diverge from the value of the Class B Shares
and their distributions had you owned such Class B Shares. Such reductions
would not apply if you owned the Class B Shares of the EuroFund.

YOUR YIELD MAY BE LOWER THAN THE YIELD ON A STANDARD DEBT SECURITY OF
COMPARABLE MATURITY

The amount we pay you at maturity may be less than the return you could earn
on other similar investments. Your yield may be less than the yield you would
earn if you bought a standard senior non-callable debt security

S-8
<PAGE>

of the Company with the same maturity date. Your investment may not reflect
the full opportunity cost to you when you consider the effect of factors that
affect the time value of money.

UNCERTAIN TRADING MARKET

Application will be made to have the MITTS Securities listed on the AMEX
under the symbol "EFM". However, you cannot assume that a trading market will
develop for the MITTS Securities. If such a trading market does develop, there
can be no assurance that there will be liquidity in the trading market. The
development of a trading market for the MITTS Securities will depend on the
financial performance of the Company, and other factors such as the
appreciation, if any, of the value of the EuroFund Index.

If the trading market for the MITTS Securities is limited, there may be a
limited number of buyers when you decide to sell your MITTS Securities if you
do not wish to hold your investment until maturity. This may affect the price
you receive.

FACTORS AFFECTING TRADING VALUE OF THE MITTS SECURITIES

We believe that the market value of the MITTS Securities will be affected by
the value of the EuroFund Index and by a number of other factors. Some of
these factors are interrelated in complex ways; as a result, the effect of any
one factor may be offset or magnified by the effect of another factor. The
following paragraphs describe the expected impact on the market value of the
MITTS Securities given a change in a specific factor, assuming all other
conditions remain constant.

. EUROFUND INDEX. We expect that the market value of the MITTS Securities
will depend substantially on the amount by which the value of the
EuroFund Index exceeds or does not exceed the Starting Index Value. If
you choose to sell your MITTS Securities when the value of the EuroFund
Index exceeds the Starting Index Value on any given date, you may
receive substantially less than the value that would be payable at
maturity based on that value of the EuroFund Index because of the
expectation that the value of the EuroFund Index will continue to
fluctuate until the Ending Index Value is determined. If you choose to
sell your MITTS Securities when the value of the EuroFund Index is
below, or not sufficiently above, the Starting Index Value, you may
receive less than the Principal Amount per Unit of MITTS Securities and
lose a substantial portion of your investment. Political, economic and
other developments that affect the securities owned by the EuroFund may
also affect the value of the EuroFund Index and the value of the MITTS
Securities.

. INTEREST RATES. Because the MITTS Securities repay, at a minimum, the
Principal Amount at maturity, we expect that the trading value of the
MITTS Securities will be affected by changes in interest rates. In
general, if interest rates increase, we expect that the trading value of
the MITTS Securities will decrease. If interest rates decrease, we
expect the trading value of the MITTS Securities will increase.

. VOLATILITY OF THE EUROFUND INDEX. Volatility is the term used to
describe the size and frequency of market fluctuations. If the
volatility of the EuroFund Index increases, we expect that the trading
value of the MITTS Securities will increase. If the volatility of the
EuroFund Index decreases, we expect that the trading value of the MITTS
Securities will decrease.

. TIME REMAINING TO MATURITY. The MITTS Securities may trade at a value
above that which would be expected based on the level of interest rates
and the EuroFund Index. This difference will reflect a "time premium"
due to expectations concerning the value of the EuroFund Index during
the period prior to maturity of the MITTS Securities. However, as the
time remaining to maturity of the MITTS Securities decreases, we expect
that this time premium will decrease, lowering the trading value of the
MITTS Securities.

. COMPANY CREDIT RATINGS. Real or anticipated changes in the Company's
credit ratings may affect the market value of the MITTS Securities.

It is important for you to understand that the impact of one of the factors
specified above, such as an increase in interest rates, may offset some or all
of any increase in the trading value of the MITTS Securities attributable to
another factor, such as an increase in the EuroFund Index.

S-9
<PAGE>

In general, assuming all relevant factors are held constant, we expect that
the effect on the trading value of the MITTS Securities of a given change in
most of the factors listed above will be less if it occurs later in the term
of the MITTS Securities than if it occurs earlier in the term of the MITTS
Securities except that we expect that the effect on the trading value of the
MITTS Securities of a given increase in the EuroFund Index will be greater if
it occurs later in the term of the MITTS Securities than if it occurs earlier
in the term of the MITTS Securities.

THE EUROFUND

Because the operation and management of the EuroFund will affect the value
of the EuroFund Index, you should carefully review the information concerning
the EuroFund provided in this Prospectus Supplement (see "The EuroFund Index--
The EuroFund" herein) and the information contained in the attached prospectus
for the shares of the EuroFund and filed by the EuroFund with the SEC that
describes the investment objectives of the EuroFund and risks related to an
investment in the EuroFund.

You should particularly review such information related to an investment in
the EuroFund because, if available, we will deliver Class D Shares of the
EuroFund to you upon maturity of the MITTS Securities. As a shareholder of the
EuroFund, you will be subject to the risks of investing in the EuroFund until
you redeem such Class D Shares. There may be costs to you in any such
redemption, which will be determined in accordance with the applicable fees
charged by the EuroFund at such time.

NO SHAREHOLDER'S RIGHTS

You will not be entitled to any rights with respect to any shares of the
EuroFund (including, without limitation, voting rights and rights to receive
any dividends or distributions on such shares) until we deliver Class D Shares
at the maturity of the MITTS Securities. For example, if the EuroFund sets a
record date for a matter to be voted on by holders of Class D Shares prior to
our delivery of Class D Shares to you, you will not be entitled to vote on any
such matter. You should be aware that if Class D Shares of the EuroFund are
not available for sale to new investors immediately prior to the stated
maturity date, we will pay you the Principal Amount and the Supplemental
Redemption Amount in cash instead of delivering Class D Shares on the stated
maturity date.

STATE LAW LIMITS ON INTEREST PAID

New York State laws govern the 1983 Indenture, as hereinafter defined. New
York has certain usury laws that limit the amount of interest that can be
charged and paid on loans, which includes debt securities like the MITTS
Securities. Under present New York law, the maximum rate of interest is 25%
per annum on a simple interest basis. This limit may not apply to debt
securities in which $2,500,000 or more has been invested.

While we believe that New York law would be given effect by a state or
Federal court sitting outside of New York, many other states also have laws
that regulate the amount of interest that may be charged to and paid by a
borrower. We will promise, for the benefit of Holders of the MITTS Securities,
to the extent permitted by law, not to voluntarily claim the benefits of any
laws concerning usurious rates of interest.

PURCHASES AND SALES BY MERRILL LYNCH

The Company, MLPF&S and other affiliates of the Company may from time to
time buy or sell shares of the EuroFund or shares of the companies in which
the EuroFund invests, for their own accounts, for business reasons or in
connection with hedging the Company's obligations under the MITTS Securities.
These transactions could affect the EuroFund Index.

POTENTIAL CONFLICTS

The Calculation Agent is a subsidiary of the Company, the issuer of the
MITTS Securities. Under certain circumstances, MLPF&S's role as a subsidiary
of the Company and its responsibilities as Calculation Agent for the MITTS
Securities could give rise to conflicts of interests. You should be aware that
because the Calculation Agent is controlled by the Company, potential
conflicts of interest could arise.

S-10
<PAGE>

RATIO OF EARNINGS TO FIXED CHARGES

The following table sets forth the historical ratios of earnings to fixed
charges for the periods indicated:

<TABLE>
<CAPTION>
YEAR ENDED LAST FRIDAY IN DECEMBER THREE MONTHS
-------------------------------------- ENDED
1993 1994 1995 1996 1997 MARCH 27, 1998
------ ------ ------ ------ ------ --------------
<S> <C> <C> <C> <C> <C> <C>
Ratio of earnings to fixed
charges..................... 1.4 1.2 1.2 1.2 1.2 1.2
</TABLE>

For the purpose of calculating the ratio of earnings to fixed charges,
"earnings" consist of earnings from continuing operations before income taxes
and fixed charges. "Fixed charges" consist of interest costs, amortization of
debt expense, preferred stock dividend requirements of majority-owned
subsidiaries, and that portion of rentals estimated to be representative of
the interest factor.

DESCRIPTION OF THE MITTS SECURITIES

GENERAL

The MITTS Securities are to be issued as a series of Senior Debt Securities
under the Senior Indenture, referred to as the "1983 Indenture", which is more
fully described in the accompanying Prospectus. The MITTS Securities will
mature on February , 2006.

While at maturity a beneficial owner of a MITTS Security will receive, if
available, the number of Class D Shares of the EuroFund equal in value
(determined based on the Maturity NAV) to the sum of the Principal Amount of
such MITTS Security plus the Supplemental Redemption Amount, if any, there
will be no other payment of interest, periodic or otherwise. See "Delivery at
Maturity".

The MITTS Securities are not subject to redemption by the Company or at the
option of any beneficial owner prior to maturity. Upon the occurrence of an
Event of Default with respect to the MITTS Securities, beneficial owners of
the MITTS Securities may accelerate the maturity of the MITTS Securities, as
described under "Description of the MITTS Securities--Events of Default and
Acceleration" in this Prospectus Supplement and "Description of Debt
Securities--General Events of Default" in the accompanying Prospectus.

The MITTS Securities are to be issued in denominations of whole Units.

DELIVERY AT MATURITY

"General"

At maturity, a beneficial owner of a MITTS Security will be entitled to
receive the number of Class D Shares of the EuroFund equal in value
(determined based on the Maturity NAV) to the Principal Amount of such MITTS
Security plus the Supplemental Redemption Amount, if any, all as provided
below. The number of Class D Shares delivered by the Company will be rounded
to the nearest one-thousandth of a share. If the Ending Index Value does not
exceed the Starting Index Value, a beneficial owner of a MITTS Security will
be entitled to receive only the number of Class D Shares of the EuroFund equal
in value (determined based on the Maturity NAV) to the Principal Amount of
such MITTS Security.

"Maturity NAV" shall mean the net asset value for the Class D Shares of the
EuroFund as reported by the EuroFund on the first Calculation Day during the
Calculation Period; "provided, however," if no Calculation Days occur during the
Calculation Period because of Market Disruption Events, then Maturity NAV
shall mean the net asset value for the Class D Shares of the EuroFund as
reported by the EuroFund on the last scheduled Index Business Day in the
Calculation Period regardless of the occurrence of a Market Disruption Event
on such day.

S-11
<PAGE>

Notwithstanding the foregoing, if the EuroFund is not issuing Class D Shares
to new investors in the EuroFund on the date Maturity NAV is to be determined,
the Company may, in lieu of delivering Class D Shares of the EuroFund, pay
cash in an amount equal to the sum of the Principal Amount of the MITTS
Securities and the Supplemental Redemption Amount, if any.

"Determination of the Supplemental Redemption Amount"

The Supplemental Redemption Amount for a MITTS Security will be determined
by the Calculation Agent and will equal:
<TABLE>
<S> <C>
Principal Amount of such MITTS Security ($10 per Unit) X (Ending Index Value - Starting Index Value)
(-----------------------------------------)
( Starting Index Value )
</TABLE>
"provided, however," that in no event will the Supplemental Redemption Amount be
less than zero.

The Starting Index Value will equal the value of the EuroFund Index on the
Pricing Date. The value of the EuroFund Index on the Pricing Date will be set
to match the net asset value of Class B Shares of the EuroFund determined and
published by the EuroFund as of approximately 15 minutes after the close of
business on the NYSE (generally, 4:00 p.m., New York City time). We will
disclose the Starting Index Value in the final form of Prospectus Supplement
delivered to purchasers of the MITTS Securities.

The Ending Index Value will be determined by the Calculation Agent and will
equal the closing value of the EuroFund Index determined on the first
Calculation Day during the Calculation Period. If no Calculation Days occur
during the Calculation Period because of Market Disruption Events, then the
Ending Index Value will equal the closing value of the EuroFund Index
determined on the last scheduled Index Business Day in the Calculation Period
regardless of the occurrence of a Market Disruption Event on such day.

The "Calculation Period" means the period from and including the fourth
scheduled Index Business Day prior to the stated maturity date to and
including the second scheduled Index Business Day prior to the stated maturity
date.

"Calculation Day" means any Index Business Day during the Calculation Period
on which a Market Disruption Event has not occurred.

"Index Business Day" means any day on which the NYSE and the AMEX are open
for trading and the AMEX calculates and publishes the EuroFund Index.

"Market Disruption Event" means the EuroFund (i) is unable or otherwise
fails to issue a net asset value for any series of shares of the EuroFund
within one hour of the close of business on the NYSE (generally, 4:00 p.m.,
New York City time) or (ii) suspends redemption of shares of the EuroFund.

All determinations made by the Calculation Agent shall be at the sole
discretion of the Calculation Agent and, absent a determination by the
Calculation Agent of a manifest error, shall be conclusive for all purposes
and binding on the Company and beneficial owners of the MITTS Securities.

S-12
<PAGE>

HYPOTHETICAL RETURNS

The following table illustrates, for a range of hypothetical Ending Index
Values, (i) the percentage change of the Ending Index Value over the Starting
Index Value, (ii) the total value of Class D Shares deliverable at maturity
for each $10 Principal Amount of MITTS Securities, (iii) the total rate of
return to beneficial owners of the MITTS Securities, (iv) the pretax
annualized rate of return to beneficial owners of MITTS Securities, and (v)
the pretax annualized rate of return of Class B Shares.

<TABLE>
<CAPTION>
TOTAL AMOUNT OF CLASS
PERCENTAGE CHANGE OF D SHARES DELIVERABLE
ENDING INDEX VALUE AT MATURITY PER $10 TOTAL RATE OF PRETAX ANNUALIZED RATE PRETAX ANNUALIZED RATE
HYPOTHETICAL ENDING OVER THE STARTING PRINCIPAL AMOUNT OF RETURN ON THE MITTS OF RETURN ON THE OF RETURN OF CLASS B
INDEX VALUE INDEX VALUE MITTS SECURITIES SECURITIES MITTS SECURITIES(1) SHARES(1)(2)
- ------------------- -------------------- --------------------- ------------------- ---------------------- ----------------------
<S> <C> <C> <C> <C> <C>
3.60 -80.00% $10.00 0.00% 0.00% -17.97%
7.20 -60.00% $10.00 0.00% 0.00% -9.36%
10.80 -40.00% $10.00 0.00% 0.00% -4.14%
14.40 -20.00% $10.00 0.00% 0.00% -0.35%
18.00(3) 0.00% $10.00 0.00% 0.00% 2.64%
21.60 20.00% $12.00 20.00% 2.45% 5.12%
25.20 40.00% $14.00 40.00% 4.54% 7.24%
28.80 60.00% $16.00 60.00% 6.36% 9.09%
32.40 80.00% $18.00 80.00% 7.99% 10.74%
36.00 100.00% $20.00 100.00% 9.46% 12.22%
39.60 120.00% $22.00 120.00% 10.79% 13.58%
43.20 140.00% $24.00 140.00% 12.02% 14.82%
46.80 160.00% $26.00 160.00% 13.15% 15.97%
50.40 180.00% $28.00 180.00% 14.21% 17.04%
54.00 200.00% $30.00 200.00% 15.20% 18.04%
</TABLE>
- -------
(1) The annualized rates of return specified in the preceding table are
calculated on a semiannual bond equivalent basis.
(2) This rate of return assumes, in addition to the price changes described
above, (i) an initial investment of a fixed amount in the Series B Shares
of the EuroFund; (ii) a reinvestment of all cash dividends and
distributions in the Series B Shares of the EuroFund; (iii) no transaction
fees or expenses; (iv) an investment term equal to the term of the MITTS
Securities; and (v) a final EuroFund Index value equal to the Ending Index
Value.
(3) The net asset value of Class B Shares on July 22, 1998 was 18.07. The
Starting Index Value will equal the value of the EuroFund Index on the
Pricing Date (which will equal the net asset value of Class B Shares on
the Pricing Date).

The above figures are for purposes of illustration only. The actual
Supplemental Redemption Amount and the total and pretax annualized rate of
return resulting therefrom will depend entirely on the actual Starting Index
Value and Ending Index Value determined by the Calculation Agent as provided
herein. Historical data regarding the EuroFund Index is included in this
Prospectus Supplement under "The EuroFund Index--Historical Data on the
EuroFund Index".

ADJUSTMENTS TO THE EUROFUND INDEX

If at any time the method of calculating the EuroFund Index, or the value
thereof, is changed in any material respect, or if the EuroFund Index is in
any other way modified so that such EuroFund Index does not, in the opinion of
the Calculation Agent, fairly represent the value of the EuroFund Index had
such changes or modifications not been made, then, from and after such time,
the Calculation Agent shall, at the close of business in New York, New York,
on each date that the closing value with respect to the Ending Index Value is
to be calculated, make such adjustments as, in the good faith judgment of the
Calculation Agent, may be necessary in order to arrive at a calculation of a
value of a fund index comparable to the EuroFund Index as if such changes or
modifications had not been made, and calculate such closing value with
reference to the EuroFund Index, as adjusted. Accordingly, if the method of

S-13
<PAGE>

calculating the EuroFund Index is modified so that the value of such EuroFund
Index is a fraction or a multiple of what it would have been if it had not
been modified (e.g., due to a split in the EuroFund Index), then the
Calculation Agent shall adjust such EuroFund Index in order to arrive at a
value of the EuroFund Index as if it had not been modified (e.g., as if such
split had not occurred).

DISCONTINUANCE OF THE EUROFUND INDEX

If the AMEX discontinues publication of the EuroFund Index and the AMEX or
another entity publishes a successor or substitute index that the Calculation
Agent determines, in its sole discretion, to be comparable to such EuroFund
Index (any such index being referred to hereinafter as a "Successor Index"),
then, upon the Calculation Agent's notification of such determination to the
Trustee and the Company, the Calculation Agent will substitute the Successor
Index as calculated by the AMEX or such other entity for the EuroFund Index
and calculate the Ending Index Value as described above under "Payment at
Maturity". Upon any selection by the Calculation Agent of a Successor Index,
the Company shall cause notice thereof to be given to Holders of the MITTS
Securities.

If the AMEX discontinues publication of the EuroFund Index and a Successor
Index is not selected by the Calculation Agent or is no longer published on
any of the Calculation Days, the value to be substituted for the EuroFund
Index for any such Calculation Day used to calculate the Supplement Redemption
Amount at maturity will be a value computed by the Calculation Agent for each
Calculation Day in accordance with the procedures last used to calculate the
EuroFund Index prior to any such discontinuance. If a Successor Index is
selected or the Calculation Agent calculates a value as a substitute for the
EuroFund Index as described below, such Successor Index or value shall be
substituted for the EuroFund Index for all purposes, including for purposes of
determining whether a Market Disruption Event exists.

If the AMEX discontinues publication of the EuroFund Index prior to the
period during which the Supplemental Redemption Amount is to be determined and
the Calculation Agent determines that no Successor Index is available at such
time, then on each Business Day until the earlier to occur of (a) the
determination of the Ending Index Value and (b) a determination by the
Calculation Agent that a Successor Index is available, the Calculation Agent
shall determine the value that would be used in computing the Supplemental
Redemption Amount as described in the preceding paragraph as if such day were
a Calculation Day. The Calculation Agent will cause notice of each such value
to be published not less often than once each month in "The Wall Street Journal"
(or another newspaper of general circulation), and arrange for information
with respect to such values to be made available by telephone. Notwithstanding
these alternative arrangements, discontinuance of the publication of the
EuroFund Index may adversely affect trading in the MITTS Securities.

EVENTS OF DEFAULT AND ACCELERATION

In case an Event of Default with respect to any MITTS Securities shall have
occurred and be continuing, the amount payable to a beneficial owner of a
MITTS Security upon any acceleration permitted by the MITTS Securities, with
respect to each $10 principal amount thereof, will be equal to the Principal
Amount and the Supplemental Redemption Amount, if any, calculated as though
the date of early repayment were the stated maturity date of the MITTS
Securities. See "Description of the MITTS Securities--Payment at Maturity" in
this Prospectus Supplement. If a bankruptcy proceeding is commenced in respect
of the Company, the claim of the beneficial owner of a MITTS Security may be
limited, under Section 502(b)(2) of Title 11 of the United States Code, to the
Principal Amount of the MITTS Security plus an additional amount of contingent
interest calculated as though the date of the commencement of the proceeding
were the maturity date of the MITTS Securities.

In case of default in payment at the maturity date of the MITTS Securities
(whether at their stated maturity or upon acceleration), from and after the
maturity date the MITTS Securities shall bear interest, payable upon demand of
the beneficial owners thereof, at the rate of % per annum (to the extent that
payment of such interest shall be legally enforceable) on the unpaid amount
due and payable on such date in accordance with the terms of the MITTS
Securities to the date payment of such amount has been made or duly provided
for.

S-14
<PAGE>

DEPOSITARY

Upon issuance, all MITTS Securities will be represented by one or more fully
registered global securities (the "Global Securities"). Each such Global
Security will be deposited with, or on behalf of, The Depository Trust Company
("DTC"; DTC, together with any successor thereto, being a "Depositary"), as
Depositary, registered in the name of Cede & Co. (DTC's partnership nominee).
Unless and until it is exchanged in whole or in part for MITTS Securities in
definitive form, no Global Security may be transferred except as a whole by
the Depositary to a nominee of such Depositary or by a nominee of such
Depositary to such Depositary or another nominee of such Depositary or by such
Depositary or any such nominee to a successor of such Depositary or a nominee
of such successor.

So long as DTC, or its nominee, is a registered owner of a Global Security,
DTC or its nominee, as the case may be, will be considered the sole owner or
Holder of the MITTS Securities represented by such Global Security for all
purposes under the 1983 Indenture. Except as provided below, the actual owner
of the MITTS Securities represented by a Global Security (the "Beneficial
Owner") will not be entitled to have the MITTS Securities represented by such
Global Securities registered in their names, will not receive or be entitled
to receive physical delivery of the MITTS Securities in definitive form and
will not be considered the owners or Holders thereof under the 1983 Indenture,
including for purposes of receiving any reports delivered by the Company or
the Trustee pursuant to the 1983 Indenture. Accordingly, each person owning a
beneficial interest in a Global Security must rely on the procedures of DTC
and, if such person is not a participant of DTC (a "Participant"), on the
procedures of the Participant through which such person owns its interest, to
exercise any rights of a Holder under the 1983 Indenture. The Company
understands that under existing industry practices, in the event that the
Company requests any action of Holders or that an owner of a beneficial
interest in such a Global Security desires to give or take any action which a
Holder is entitled to give or take under the 1983 Indenture, DTC would
authorize the Participants holding the relevant beneficial interests to give
or take such action, and such Participants would authorize Beneficial Owners
owning through such Participants to give or take such action or would
otherwise act upon the instructions of Beneficial Owners. Conveyance of
notices and other communications by DTC to Participants, by Participants to
Indirect Participants, as defined below, and by Participants and Indirect
Participants to Beneficial Owners will be governed by arrangements among them,
subject to any statutory or regulatory requirements as may be in effect from
time to time.

If (x) the Depositary is at any time unwilling or unable to continue as
Depositary and a successor depositary is not appointed by the Company within
60 days, (y) the Company executes and delivers to the Trustee a Company Order
to the effect that the Global Securities shall be exchangeable or (z) an Event
of Default has occurred and is continuing with respect to the MITTS
Securities, the Global Securities will be exchangeable for MITTS Securities in
definitive form of like tenor and of an equal aggregate principal amount, in
denominations of $10 and integral multiples thereof. Such definitive MITTS
Securities shall be registered in such name or names as the Depositary shall
instruct the Trustee. It is expected that such instructions may be based upon
directions received by the Depositary from Participants with respect to
ownership of beneficial interests in such Global Securities.

The following is based on information furnished by DTC:

DTC will act as securities depositary for the MITTS Securities. The MITTS
Securities will be issued as fully registered securities registered in the
name of Cede & Co. (DTC's partnership nominee). One or more fully registered
Global Securities will be issued for the MITTS Securities in the aggregate
principal amount of such issue, and will be deposited with DTC.

DTC is a limited-purpose trust company organized under the New York Banking
Law, a "banking organization" within the meaning of the New York Banking Law,
a member of the Federal Reserve System, a "clearing corporation" within the
meaning of the New York Uniform Commercial Code, and a "clearing agency"
registered pursuant to the provisions of Section 17A of the Securities
Exchange Act of 1934, as amended. DTC holds securities that its Participants
deposit with DTC. DTC also facilitates the settlement among

S-15
<PAGE>

Participants of securities transactions, such as transfers and pledges, in
deposited securities through electronic computerized book-entry changes in
Participants' accounts, thereby eliminating the need for physical movement of
securities certificates. Direct Participants of DTC ("Direct Participants")
include securities brokers and dealers, banks, trust companies, clearing
corporations and certain other organizations. DTC is owned by a number of its
Direct Participants and by the New York Stock Exchange, Inc., the American
Stock Exchange, Inc., and the National Association of Securities Dealers, Inc.
Access to the DTC's system is also available to others such as securities
brokers and dealers, banks and trust companies that clear through or maintain
a custodial relationship with a Direct Participant, either directly or
indirectly ("Indirect Participants"). The rules applicable to DTC and its
Participants are on file with the SEC.

Purchases of MITTS Securities under the DTC's system must be made by or
through Direct Participants, which will receive a credit for the MITTS
Securities on the DTC's records. The ownership interest of each Beneficial
Owner is in turn to be recorded on the records of Direct Participants and
Indirect Participants. Beneficial Owners will not receive written confirmation
from DTC of their purchase, but Beneficial Owners are expected to receive
written confirmations providing details of the transaction, as well as
periodic statements of their holdings, from the Direct Participants or
Indirect Participants through which such Beneficial Owner entered into the
transaction. Transfers of ownership interests in the MITTS Securities are to
be accomplished by entries made on the books of Participants acting on behalf
of Beneficial Owners. Beneficial Owners will not receive certificates
representing their ownership interests in MITTS Securities, except in the
event that use of the book-entry system for the MITTS Securities is
discontinued.

To facilitate subsequent transfers, all MITTS Securities deposited with DTC
are registered in the name of DTC's partnership nominee, Cede & Co. The
deposit of MITTS Securities with DTC and their registration in the name of
Cede & Co. effect no change in beneficial ownership. DTC has no knowledge of
the actual Beneficial Owners of the MITTS Securities; DTC's records reflect
only the identity of the Direct Participants to whose accounts such MITTS
Securities are credited, which may or may not be the Beneficial Owners. The
Participants will remain responsible for keeping account of their holdings on
behalf of their customers.

Conveyance of notices and other communications by DTC to Direct
Participants, by Direct Participants to Indirect Participants, and by Direct
Participants and Indirect Participants to Beneficial Owners will be governed
by arrangements among them, subject to any statutory or regulatory
requirements as may be in effect from time to time.

Neither DTC nor Cede & Co. will consent or vote with respect to the MITTS
Securities. Under its usual procedures, DTC mails an Omnibus Proxy to the
Company as soon as possible after the applicable record date. The Omnibus
Proxy assigns Cede & Co.'s consenting or voting rights to those Direct
Participants to whose accounts the MITTS Securities are credited on the record
date (identified in a listing attached to the Omnibus Proxy).

Principal, premium, if any, and/or interest, if any, payments to be made in
cash on the MITTS Securities will be made in immediately available funds to
DTC. DTC's practice is to credit Direct Participants' accounts on the
applicable payment date in accordance with their respective holdings shown on
the Depositary's records unless DTC has reason to believe that it will not
receive payment on such date. Such payments by Participants to Beneficial
Owners will be governed by standing instructions and customary practices, as
is the case with securities held for the accounts of customers in bearer form
or registered in "street name", and will be the responsibility of such
Participant and not of DTC, the Trustee or the Company, subject to any
statutory or regulatory requirements as may be in effect from time to time.
Payment of principal, premium, if any, and/or interest, if any, to DTC is the
responsibility of the Company or the Trustee, disbursement of such payments to
Direct Participants shall be the responsibility of DTC, and disbursement of
such payments to the Beneficial Owners shall be the responsibility of Direct
Participants and Indirect Participants.

DTC may discontinue providing its services as securities depositary with
respect to the MITTS Securities at any time by giving reasonable notice to the
Company or the Trustee. Under such circumstances, in the event that

S-16
<PAGE>

a successor securities depositary is not obtained, MITTS Security certificates
are required to be printed and delivered.

The Company may decide to discontinue use of the system of book-entry
transfers through DTC (or a successor securities depositary). In that event,
security certificates will be printed and delivered.

The information in this section concerning DTC and DTC's system has been
obtained from sources that the Company believes to be reliable, but the
Company takes no responsibility for the accuracy thereof.

SAME-DAY SETTLEMENT AND DELIVERY

Settlement for the MITTS Securities will be made by the underwriter in
immediately available funds. All payments of principal and the Supplemental
Redemption Amount, if any, will be made by the Company, if available, by
delivery of Class D Shares in an equivalent value.

THE EUROFUND INDEX

CALCULATION OF THE EUROFUND INDEX

"General"

The AMEX will set the starting value of the EuroFund Index to equal the net
asset value of one Class B Share of the EuroFund as of approximately 15
minutes after the close of business on the NYSE (generally, 4:00 p.m., New
York City time) on the Pricing Date. Thereafter, the AMEX will calculate the
value of the EuroFund Index on any day by multiplying the current Index Share
Multiplier by the most recent net asset value per Class B Share announced by
the EuroFund.

"Calculation of the Index Share Multiplier"

The Index Share Multiplier shall initially be set to one, representing one
Class B Share of the EuroFund. If the EuroFund distributes any cash dividends
or distributions of any character to holders of the Class B Shares (a "Cash
Distribution"), then the Index Share Multiplier shall be increased by a
percentage of Class B Shares equal to the Cash Distribution divided by the net
asset value for Class B Shares reported by the EuroFund as of approximately 15
minutes after the close of business on the NYSE (generally, 4:00 p.m., New
York City time) on the date that such Cash Distribution is paid to holders of
Class B Shares. If a Market Disruption Event has occurred on the day any such
Cash Distribution is paid, the adjustment to the Index Share Multiplier shall
be postponed until the next succeeding Index Business Day on which a Market
Disruption Event has not occurred. The Index Share Multiplier shall also be
adjusted by the AMEX to reflect certain stock splits, reverse stock splits or
share dividends that may occur with respect to the Class B Shares.

At the close of business on each calendar day, the AMEX shall reduce the
value of the EuroFund Index by a percentage equal to between 2.50% to 2.75%
divided by 365 and reset the Index Multiplier so that the product of such net
asset value and the revised Index Share Multiplier equals the value of the
EuroFund Index so reduced. If a Market Disruption Event occurs on any day on
which the EuroFund Index value is to be determined, then the foregoing
adjustment to the Index Share Multiplier shall occur on the next succeeding
Index Business Day on which a Market Disruption Event has not occurred.

THE EUROFUND

WE HAVE ATTACHED THE EUROFUND PROSPECTUS DESCRIBING THE EUROFUND AND ARE
DELIVERING IT TO PROSPECTIVE PURCHASERS OF THE MITTS SECURITIES TOGETHER WITH
THIS PROSPECTUS SUPPLEMENT AND THE ACCOMPANYING PROSPECTUS OF THE COMPANY FOR
THE CONVENIENCE OF REFERENCE ONLY. THE EUROFUND PROSPECTUS DOES NOT CONSTITUTE
A PART OF THIS PROSPECTUS SUPPLEMENT OR THE ACCOMPANYING PROSPECTUS OF

S-17
<PAGE>

THE COMPANY, NOR IS IT INCORPORATED BY REFERENCE HEREIN OR THEREIN. THE
SUMMARY DESCRIPTION BELOW IS QUALIFIED IN ITS ENTIRETY BY THE INFORMATION
DESCRIBING THE EUROFUND INCLUDED IN THE ATTACHED EUROFUND PROSPECTUS.

The EuroFund has stated that its investment objectives are to seek capital
appreciation primarily through investment in equities of corporations
domiciled in European countries. Current income from dividends and interest
will not be an important consideration in selecting portfolio securities. The
EuroFund has stated that it anticipates that under normal market conditions at
least 80% of its net assets will consist of European corporate securities,
primarily common stocks and securities convertible into common stock.

The EuroFund is a diversified, open-end management investment company under
the Investment Company Act of 1940, as amended (the "Investment Company Act").

The EuroFund has publicly disclosed its intention to distribute all of its
net investment income, if any. The EuroFund Prospectus indicates that
dividends from such net investment income are paid at least annually and all
net realized capital gains, if any, are distributed to the shareholders of the
EuroFund annually.

The EuroFund is subject to the registration requirements of the Securities
Act of 1933, as amended, and the Investment Company Act. Accordingly, the
EuroFund files prospectuses, statements of additional information, reports,
proxy and other information statements and other information with the SEC.
Information provided to or filed with the SEC by the EuroFund is available at
the offices of the SEC specified under "Available Information" in the
accompanying Prospectus. The Company makes no representation or warranty as to
the accuracy or completeness of such reports.

The foregoing summary of the policies of the EuroFund reflect certain
investment restrictions which are subject to change by shareholders of the
EuroFund at any time.

The EuroFund is managed by Merrill Lynch Asset Management, L.P., an
affiliate of the Company. The EuroFund itself is governed by an independent
board of directors.

THE EUROFUND HAS NO OBLIGATIONS WITH RESPECT TO THE MITTS SECURITIES. THIS
PROSPECTUS SUPPLEMENT RELATES ONLY TO THE MITTS SECURITIES OFFERED HEREBY AND
DOES NOT RELATE TO THE CLASS B OR CLASS D SHARES OF THE EUROFUND. THE
INFORMATION CONTAINED IN THIS PROSPECTUS SUPPLEMENT REGARDING THE EUROFUND HAS
BEEN DERIVED FROM THE PUBLICLY AVAILABLE DOCUMENTS DESCRIBED IN THE PRECEDING
PARAGRAPH. THE COMPANY HAS NOT PARTICIPATED IN THE PREPARATION OF SUCH
DOCUMENTS OR MADE ANY DUE DILIGENCE INQUIRIES WITH RESPECT TO THE EUROFUND IN
CONNECTION WITH THE OFFERING OF THE MITTS SECURITIES. THE COMPANY MAKES NO
REPRESENTATION THAT SUCH PUBLICLY AVAILABLE DOCUMENTS OR ANY OTHER PUBLICLY
AVAILABLE INFORMATION REGARDING THE EUROFUND ARE ACCURATE OR COMPLETE.
FURTHERMORE, THERE CAN BE NO ASSURANCE THAT ALL EVENTS OCCURRING PRIOR TO THE
DATE HEREOF (INCLUDING EVENTS THAT WOULD AFFECT THE ACCURACY OR COMPLETENESS
OF THE PUBLICLY AVAILABLE DOCUMENTS DESCRIBED IN THE PRECEDING PARAGRAPH) THAT
WOULD AFFECT THE EUROFUND INDEX (AND THEREFORE THE TRADING PRICE OF THE MITTS
SECURITIES) HAVE BEEN PUBLICLY DISCLOSED. SUBSEQUENT DISCLOSURE OF ANY SUCH
EVENTS OR THE DISCLOSURE OF OR FAILURE TO DISCLOSE MATERIAL FUTURE EVENTS
CONCERNING THE EUROFUND COULD AFFECT THE SUPPLEMENTAL REDEMPTION AMOUNT TO BE
RECEIVED AT THE STATE MATURITY DATE AND THEREFORE THE TRADING VALUE OF THE
MITTS SECURITIES.

S-18
<PAGE>

HISTORICAL DATA ON THE EUROFUND INDEX

The following table sets forth the hypothetical level of the EuroFund Index
at the end of each month (the "Historical Month-End Closing Level") in the
period from January 1993 through June 1998. All historical data presented in
the following table were calculated and are presented as if the EuroFund Index
had existed during such periods. The Historical Month-End Closing Level was
set to 10.85 on December 31, 1992, which was the net asset value of the Class
B Shares of the EuroFund on such date, to provide an illustration of past
movements of the Historical Month-End Closing Level only. The Starting Index
Value and EuroFund Index will each be set to the net asset value of Class B
Shares of the EuroFund determined and published by the EuroFund as of
approximately 15 minutes after the close of business on the NYSE (generally,
4:00 p.m., New York City time) on the Pricing Date. For purposes of
calculating the following hypothetical historical values, we have assumed that
the EuroFund was reduced by 2.625% of its value each year and have assumed a
reinvestment of dividends and distributions at the end of the month in which
they were paid. The 2.625% amount represents the midpoint of the range of
possible percentages that will be used to reduce the EuroFund Index each year.
These historical data on the EuroFund Index are not necessarily indicative of
the future performance of the EuroFund Index or what the value of the MITTS
Securities may be. Any historical upward or downward trend in the level of the
EuroFund Index during any period set forth below is not any indication that
the EuroFund Index is more or less likely to increase or decrease at any time
during the term of the MITTS Securities.

HISTORICAL MONTH-END CLOSING LEVELS

The following graph sets forth the hypothetical historical performance of
the EuroFund Index at the end of each quarter from January 1993 through June
1998. Past movements of the EuroFund Index are not necessarily indicative of
the future EuroFund Index values.

LINE GRAPH

S-19
<PAGE>

CERTAIN UNITED STATES FEDERAL INCOME TAX CONSIDERATIONS

Set forth in full below is the opinion of Brown & Wood LLP, counsel to the
Company, as to certain United States Federal income tax consequences of the
purchase, ownership and disposition of the MITTS Securities. Such opinion is
based upon laws, regulations, rulings and decisions now in effect, all of
which are subject to change (including retroactive changes in effective dates)
or possible differing interpretations. The discussion below deals only with
MITTS Securities held as capital assets and does not purport to deal with
persons in special tax situations, such as financial institutions, insurance
companies, regulated investment companies, dealers in securities or
currencies, tax-exempt entities, persons holding MITTS Securities in a tax-
deferred or tax-advantaged account, or persons holding MITTS Securities as a
hedge against currency risks, as a position in a "straddle" or as part of a
"hedging" or "conversion" transaction for tax purposes. It also does not deal
with holders other than original purchasers (except where otherwise
specifically noted herein). The following discussion also assumes that the
issue price of the MITTS Securities, as determined for United States Federal
income tax purposes, equals the principal amount thereof. Persons considering
the purchase of the MITTS Securities should consult their own tax advisors
concerning the application of the United States Federal income tax laws to
their particular situations as well as any consequences of the purchase,
ownership and disposition of the MITTS Securities arising under the laws of
any other taxing jurisdiction.

As used herein, the term "U.S. Holder" means a beneficial owner of a MITTS
Security that is for United States Federal income tax purposes (a) a citizen
or resident of the United States, (b) a corporation, partnership or other
entity created or organized in or under the laws of the United States or of
any political subdivision thereof (other than a partnership that is not
treated as a United States person under any applicable Treasury regulations),
(c) an estate the income of which is subject to United States Federal income
taxation regardless of its source, (d) a trust if a court within the United
States is able to exercise primary supervision over the administration of the
trust and one or more United States persons have the authority to control all
substantial decisions of the trust, or (e) any other person whose income or
gain in respect of a MITTS Security is effectively connected with the conduct
of a United States trade or business. Notwithstanding the preceding sentence,
to the extent provided in Treasury regulations, certain trusts in existence on
August 20, 1996, and treated as United States persons prior to such date that
elect to continue to be treated as United States persons also will be a U.S.
Holder. As used herein, the term "Non-U.S. Holder" means a beneficial owner of
a MITTS Security that is not a U.S. Holder.

GENERAL

There are no statutory provisions, regulations, published rulings or
judicial decisions addressing or involving the characterization, for United
States Federal income tax purposes, of the MITTS Securities or securities with
terms substantially the same as the MITTS Securities. However, although the
matter is not free from doubt, under current law, each MITTS Security should
be treated as a debt instrument of the Company for United States Federal
income tax purposes. The Company currently intends to treat each MITTS
Security as a debt instrument of the Company for United States Federal income
tax purposes and, where required, intends to file information returns with the
Internal Revenue Service ("IRS") in accordance with such treatment, in the
absence of any change or clarification in the law, by regulation or otherwise,
requiring a different characterization of the MITTS Securities. Prospective
investors in the MITTS Securities should be aware, however, that the IRS is
not bound by the Company's characterization of the MITTS Securities as
indebtedness and the IRS could possibly take a different position as to the
proper characterization of the MITTS Securities for United States Federal
income tax purposes. The following discussion of the principal United States
Federal income tax consequences of the purchase, ownership and disposition of
the MITTS Securities is based upon the assumption that each MITTS Security
will be treated as a debt instrument of the Company for United States Federal
income tax purposes. If the MITTS Securities are not in fact treated as debt
instruments of the Company for United States Federal income tax purposes, then
the United States Federal income tax treatment of the purchase, ownership and
disposition of the MITTS Securities could differ from the treatment discussed
below with the result that the timing and character of income, gain or loss
recognized in respect of a MITTS Security could differ from the timing and
character of income, gain or loss recognized in respect of a MITTS Security
had the MITTS Securities in fact been treated as debt instruments of the
Company for United States Federal income tax purposes.

S-20
<PAGE>

U.S. HOLDERS

On June 11, 1996, the Treasury Department issued final regulations (the
"Final Regulations") concerning the proper United States Federal income tax
treatment of contingent payment debt instruments such as the MITTS Securities,
which apply to debt instruments issued on or after August 13, 1996 and,
accordingly, will apply to the MITTS Securities. In general, the Final
Regulations cause the timing and character of income, gain or loss reported on
a contingent payment debt instrument to substantially differ from the timing
and character of income, gain or loss reported on a contingent payment debt
instrument under general principles of prior United States Federal income tax
law. Specifically, the Final Regulations generally require a U.S. Holder of
such an instrument to include future contingent and noncontingent interest
payments in income as such interest accrues based upon a projected payment
schedule. Moreover, in general, under the Final Regulations, any gain
recognized by a U.S. Holder on the sale, exchange, or retirement of a
contingent payment debt instrument is treated as ordinary income and all or a
portion of any loss realized could be treated as ordinary loss as opposed to
capital loss (depending upon the circumstances). The Final Regulations provide
no definitive guidance as to whether or not an instrument is properly
characterized as a debt instrument for United States Federal income tax
purposes.

In particular, solely for purposes of applying the Final Regulations to the
MITTS Securities, the Company has determined that the projected payment
schedule for the MITTS Securities will consist of payment on the maturity date
of the principal amount thereof and a projected Supplemental Redemption Amount
equal to $ per Unit (the "Projected Supplemental Redemption Amount"). This
represents an estimated yield on the MITTS Securities equal to % per annum
(compounded semiannually). Accordingly, during the term of the MITTS
Securities, a U.S. Holder of a MITTS Security will be required to include in
income as ordinary interest an amount equal to the sum of the daily portions
of interest on the MITTS Security that are deemed to accrue at this estimated
yield for each day during the taxable year (or portion of the taxable year) on
which the U.S. Holder holds such MITTS Security. The amount of interest that
will be deemed to accrue in any accrual period (i.e., generally each six-month
period during which the MITTS Securities are outstanding) will equal the
product of this estimated yield (properly adjusted for the length of the
accrual period) and the MITTS Security's adjusted issue price (as defined
below) at the beginning of the accrual period. The daily portions of interest
will be determined by allocating to each day in the accrual period the ratable
portion of the interest that is deemed to accrue during the accrual period. In
general, for these purposes, a MITTS Security's adjusted issue price will
equal the MITTS Security's issue price (i.e., $10), increased by the interest
previously accrued on the MITTS Security. At maturity of a MITTS Security, in
the event that the actual Supplemental Redemption Amount, if any, exceeds $
per Unit (i.e., the Projected Supplemental Redemption Amount), a U.S. Holder
will be required to include the excess of the actual Supplemental Redemption
Amount over $ per Unit (i.e., the Projected Supplemental Redemption Amount)
in income as ordinary interest on the stated maturity date. Alternatively, in
the event that the actual Supplemental Redemption Amount, if any, is less than
$ per Unit (i.e., the Projected Supplemental Redemption Amount), the amount
by which the Projected Supplemental Redemption Amount (i.e., $ per Unit)
exceeds the actual Supplemental Redemption Amount will be treated first as an
offset to any interest otherwise includible in income by the U.S. Holder with
respect to the MITTS Security for the taxable year in which the stated
maturity date occurs to the extent of the amount of such includible interest.
Further, a U.S. Holder will be permitted to recognize and deduct, as an
ordinary loss that is not subject to the limitations applicable to
miscellaneous itemized deductions, any remaining portion of the Projected
Supplemental Redemption Amount (i.e., $ per Unit) in excess of the actual
Supplemental Redemption Amount that is not treated as an interest offset
pursuant to the foregoing rules. In general, if a U.S. Holder receives Class D
Shares of the EuroFund on the maturity date, such U.S. Holder's initial
aggregate tax basis in the Class D Shares of the EuroFund received by the U.S.
Holder should equal the sum of the principal amount of the MITTS Security and
the actual Supplemental Redemption Amount (less any cash received in lieu of
fractional Class D Shares of the EuroFund). This aggregate tax basis should be
allocated among the Class D Shares of the EuroFund received by the U.S. Holder
in accordance with the relative fair market value of such Class D Shares of
the EuroFund. Moreover, such U.S. Holder's holding period for any Class D
Shares of the EuroFund received by the U.S. Holder should begin on the day
immediately following the maturity date.

S-21
<PAGE>

Upon the sale, exchange or redemption of a MITTS Security prior to the
stated maturity date, a U.S. Holder will be required to recognize taxable gain
or loss in an amount equal to the difference, if any, between the amount
realized by the U.S. Holder upon such sale, exchange or redemption and the
U.S. Holder's adjusted tax basis in the MITTS Security as of the date of
disposition. A U.S. Holder's adjusted tax basis in a MITTS Security generally
will equal such U.S. Holder's initial investment in the MITTS Security
increased by any interest previously included in income with respect to the
MITTS Security by the U.S. Holder. Any such taxable gain will be treated as
ordinary income. Any such taxable loss will be treated as ordinary loss to the
extent of the U.S. Holder's total interest inclusions on the MITTS Security.
Any remaining loss generally will be treated as long-term or short-term
capital loss (depending upon the U.S. Holder's holding period for the MITTS
Security). All amounts includible in income by a U.S. Holder as ordinary
interest pursuant to the Final Regulations will be treated as original issue
discount.

Prospective investors in the MITTS Securities should be aware that if a
significant percentage of the total aggregate amount of the MITTS Securities
originally issued is sold at a discount from the principal amount thereof,
which is not expected to be the case, then the issue price of the MITTS
Securities, as determined for United States Federal income tax purposes, may
be less than the Principal Amount of the MITTS Securities. In such event, if a
U.S. Holder purchases a MITTS Security in connection with the original
issuance thereof for an amount equal to the principal amount thereof, the
amount of the difference between the Principal Amount of the MITTS Securities
and the issue price thereof generally should be allocated by the U.S. Holder
to daily portions of interest that are deemed to accrue on each such date as
an offset to such interest on each such date. In addition, on each such date,
the U.S. Holder's adjusted tax basis in the MITTS Security will be reduced by
the amount treated as an interest offset pursuant to the foregoing rule.
Alternatively, in the event that the issue price of the MITTS Securities, as
determined for United States Federal income tax purposes, equals the principal
amount thereof and a U.S. Holder purchases a MITTS Security in connection with
the original issuance thereof for an amount that is less than the principal
amount thereof, the amount of the difference between the Principal Amount of
the MITTS Security and the amount paid by the U.S. Holder to purchase the
MITTS Security generally should be allocated by the U.S. Holder to daily
portions of interest that are deemed to accrue on each such date as additional
ordinary interest includible in income by the U.S. Holder on each such date.
In such event, on each such date, the U.S. Holder's adjusted tax basis in the
MITTS Security will be increased by the amount treated as additional ordinary
interest income. In addition, U.S. Holders purchasing a MITTS Security at a
price that differs from the adjusted issue price of the MITTS Security as of
the purchase date (e.g., subsequent purchases) will be subject to special
rules providing for certain adjustments to the foregoing rules and such U.S.
Holders should consult their own tax advisors concerning these rules.
Moreover, prospective investors in the MITTS Securities should consult their
own tax advisors concerning the application of the Final Regulations to their
investment in the MITTS Securities. Investors in the MITTS Securities may also
obtain the projected payment schedule, as determined by the Company for
purposes of the application of the Final Regulations to the MITTS Securities,
by submitting a written request for such information to Merrill Lynch & Co.,
Inc., Attn: Darryl W. Colletti, Corporate Secretary's Office, 100 Church
Street, 12th Floor, New York, New York 10080-6512.

The projected payment schedule (including both the Projected Supplemental
Redemption Amount and the estimated yield on the MITTS Securities) has been
determined solely for United States Federal income tax purposes (i.e., for
purposes of applying the Final Regulations to the MITTS Securities), and is
neither a prediction nor a guarantee of what the actual Supplemental
Redemption Amount will be, or that the actual Supplemental Redemption Amount
will even exceed zero.

S-22
<PAGE>

HYPOTHETICAL TABLE

The following table sets forth the amount of interest that would be deemed
to have accrued with respect to each Unit of the MITTS Securities during each
accrual period over an assumed term of seven years and seven months for the
MITTS Securities based upon a hypothetical projected payment schedule for the
MITTS Securities (including both a hypothetical Projected Supplemental
Redemption Amount and a hypothetical estimated yield equal to 6.02% per annum
(compounded semiannually)) as determined by the Company for purposes of
illustrating the application of the Final Regulations to the MITTS Securities
as if the MITTS Securities had been issued on the date hereof. The following
table is for illustrative purposes only. The actual projected payment schedule
for the MITTS Securities (including both the actual Projected Supplemental
Redemption Amount and the actual estimated yield) will be determined by the
Company on the Pricing Date and will depend upon actual market interest rates
(and thus the Company's borrowing costs for debt instruments with comparable
maturities) as of the Pricing Date. The actual projected payment schedule for
the MITTS Securities (including both the actual Projected Supplemental
Redemption Amount and the actual estimated yield) and the actual tax accrual
table will be set forth in the final form of the Prospectus Supplement
delivered to investors in connection with sales of MITTS Securities:

<TABLE>
<CAPTION>
TOTAL INTEREST
DEEMED TO HAVE
ACCRUED ON
INTEREST DEEMED TO MITTS SECURITIES AS
ACCRUE DURING OF END
ACCRUAL PERIOD ACCRUAL PERIOD OF ACCRUAL PERIOD
-------------- ------------------ -------------------
(PER UNIT) (PER UNIT)
<S> <C> <C>
July 22, 1998 through February 22, 1999. $0.3555 $0.3555
February 23, 1999 through August 22,
1999................................... $0.3117 $0.6672
August 23, 1999 through February 22,
2000................................... $0.3211 $0.9883
February 23, 2000 through August 22,
2000................................... $0.3308 $1.3191
August 23, 2000 through February 22,
2001................................... $0.3407 $1.6598
February 23, 2001 through August 22,
2001................................... $0.3509 $2.0107
August 23, 2001 through February 22,
2002................................... $0.3616 $2.3723
February 23, 2002 through August 22,
2002................................... $0.3724 $2.7447
August 23, 2002 through February 22,
2003................................... $0.3836 $3.1283
February 23, 2003 through August 22,
2003................................... $0.3951 $3.5234
August 23, 2003 through February 22,
2004................................... $0.4071 $3.9305
February 23, 2004 through August 22,
2004................................... $0.4193 $4.3498
August 23, 2004 through February 22,
2005................................... $0.4319 $4.7817
February 23, 2005 through August 22,
2005................................... $0.4450 $5.2267
August 23, 2005 through February 22,
2006................................... $0.4583 $5.6850
</TABLE>

Hypothetical Projected Supplemental Redemption Amount = $5.6850 per Unit.

NON-U.S. HOLDERS

A non-U.S. Holder will not be subject to United States Federal income taxes
on payments of principal, premium (if any) or interest (including original
issue discount, if any) on a MITTS Security, unless such non-U.S. Holder is a
direct or indirect 10% or greater shareholder of the Company, a controlled
foreign corporation related to the Company or a bank receiving interest
described in section 881(c)(3)(A) of the Internal Revenue Code of 1986, as
amended. However, income allocable to non-U.S. Holders will generally be
subject to annual tax reporting on IRS Form 1042S. For a non-U.S. Holder to
qualify for the exemption from taxation, the last United States payor in the
chain of payment prior to payment to a non-U.S. Holder (the "Withholding
Agent") must have received in the year in which a payment of interest or
principal occurs, or in either of the two preceding calendar years, a
statement that (a) is signed by the beneficial owner of the MITTS Security
under penalties of perjury, (b) certifies that such owner is not a U.S. Holder
and (c) provides the name and address of the beneficial owner. The statement
may be made on an IRS Form W-8 or a substantially similar form, and the
beneficial owner

S-23
<PAGE>

must inform the Withholding Agent of any change in the information on the
statement within 30 days of such change. If a MITTS Security is held through a
securities clearing organization or certain other financial institutions, the
organization or institution may provide a signed statement to the Withholding
Agent. However, in such case, the signed statement must be accompanied by a
copy of the IRS Form W-8 or the substitute form provided by the beneficial
owner to the organization or institution. The Treasury Department is
considering implementation of further certification requirements.

Under current law, a MITTS Security will not be includible in the estate of
a non-U.S. Holder unless the individual is a direct or indirect 10% or greater
shareholder of the Company or, at the time of such individual's death,
payments in respect of such MITTS Security would have been effectively
connected with the conduct by such individual of a trade or business in the
United States.

BACKUP WITHHOLDING

Backup withholding of United States Federal income tax at a rate of 31% may
apply to payments made in respect of the MITTS Securities to registered owners
who are not "exempt recipients" and who fail to provide certain identifying
information (such as the registered owner's taxpayer identification number) in
the required manner. Generally, individuals are not exempt recipients, whereas
corporations and certain other entities generally are exempt recipients.
Payments made in respect of the MITTS Securities to a U.S. Holder must be
reported to the IRS, unless the U.S. Holder is an exempt recipient or
establishes an exemption. Compliance with the identification procedures
described in the preceding section would establish an exemption from backup
withholding for those non-U.S. Holders who are not exempt recipients.

In addition, upon the sale of a MITTS Security to (or through) a broker, the
broker must withhold 31% of the entire purchase price, unless either (a) the
broker determines that the seller is a corporation or other exempt recipient
or (b) the seller provides, in the required manner, certain identifying
information and, in the case of a non-U.S. Holder, certifies that such seller
is a non-U.S. Holder (and certain other conditions are met). Such a sale must
also be reported by the broker to the IRS, unless either (a) the broker
determines that the seller is an exempt recipient or (b) the seller certifies
its non-U.S. status (and certain other conditions are met). Certification of
the registered owner's non-U.S. status would be made normally on an IRS Form
W-8 under penalties of perjury, although in certain cases it may be possible
to submit other documentary evidence.

Any amounts withheld under the backup withholding rules from a payment to a
beneficial owner would be allowed as a refund or a credit against such
beneficial owner's United States Federal income tax provided that the required
information is furnished to the IRS.

NEW WITHHOLDING REGULATIONS

On October 6, 1997, the Treasury Department issued new regulations (the "New
Regulations") which make certain modifications to the withholding, backup
withholding and information reporting rules described above. The New
Regulations attempt to unify certification requirements and modify reliance
standards. The New Regulations will generally be effective for payments made
after December 31, 1999, subject to certain transition rules. Prospective
investors are urged to consult their own tax advisors regarding the New
Regulations.

USE OF PROCEEDS

The net proceeds from the sale of the MITTS Securities will be used as
described under "Use of Proceeds" in the attached Prospectus and to hedge
market risks of the Company associated with its obligation to pay the
Principal Amount and the Supplemental Redemption Amount.

S-24
<PAGE>

UNDERWRITING

MLPF&S (the "Underwriter") has agreed, subject to the terms and conditions
of the Underwriting Agreement and a Terms Agreement, to purchase from the
Company $25,000,000 aggregate principal amount of MITTS Securities. The
Underwriting Agreement provides that the obligations of the Underwriter are
subject to certain conditions precedent and that the Underwriter will be
obligated to purchase all of the MITTS Securities if any are purchased.

The Underwriter has advised the Company that it proposes initially to offer
all or part of the MITTS Securities directly to the public at the offering
prices set forth on the cover page of this Prospectus Supplement. After the
initial public offering, the public offering price and concession may be
changed. The Underwriter is offering the MITTS Securities subject to receipt
and acceptance and subject to the Underwriter's right to reject any order in
whole or in part.

The underwriting of the MITTS Securities will conform to the requirements
set forth in the applicable sections of Rule 2720 of the Conduct Rules of the
National Association of Securities Dealers, Inc.

The Underwriter is permitted to engage in certain transactions that
stabilize the price of the MITTS Securities. Such transactions consist of bids
or purchases for the purpose of pegging, fixing or maintaining the price of
the MITTS Securities.

If the Underwriter creates a short position in the MITTS Securities in
connection with the offering, i.e., if they sell more Units of the MITTS
Securities than are set forth on the cover page of this Prospectus Supplement,
the Underwriter may reduce that short position by purchasing Units of the
MITTS Securities in the open market.

In general, purchases of a security for the purpose of stabilization or to
reduce a short position could cause the price of the security to be higher
than it might be in the absence of such purchases.

Neither the Company nor the Underwriter makes any representation or
prediction as to the direction or magnitude of any effect that the
transactions described above may have on the price of the MITTS Securities. In
addition, neither the Company nor the Underwriter makes any representation
that the Underwriter will engage in such transactions or that such
transactions, once commenced, will not be discontinued without notice.

The Underwriter may use this Prospectus Supplement and the accompanying
Prospectus for offers and sales related to market-making transactions in the
MITTS Securities. The Underwriter may act as principal or agent in these
transactions, and the sales will be made at prices related to prevailing
market prices at the time of sale.

VALIDITY OF THE MITTS SECURITIES

The validity of the MITTS Securities will be passed upon for the Company and
for the Underwriter by Brown & Wood LLP, New York, New York.

S-25
<PAGE>

INDEX OF DEFINED TERMS

<TABLE>
<CAPTION>
PAGE
----
<S> <C>
AMEX....................................................................... S-1
Beneficial Owner........................................................... S-15
Calculation Agent.......................................................... S-7
Calculation Day............................................................ S-12
Calculation Period......................................................... S-12
Cash Distribution.......................................................... S-17
Company.................................................................... S-4
Depositary................................................................. S-15
Direct Participants........................................................ S-16
DTC........................................................................ S-4
Ending Index Value......................................................... S-5
EuroFund................................................................... S-1
EuroFund Index............................................................. S-4
EuroFund Prospectus........................................................ S-4
Final Regulations.......................................................... S-21
Global Securities.......................................................... S-15
Historical Month-End Closing Level......................................... S-19
Index Business Day......................................................... S-12
Index Share Multiplier..................................................... S-17
Indirect Participants...................................................... S-16
Investment Company Act..................................................... S-18
IRS........................................................................ S-20
Market Disruption Event.................................................... S-12
Maturity N A V............................................................. S-11
MITTS Securities........................................................... S-4
MLPF&S..................................................................... S-2
New Regulations............................................................ S-24
Non-U.S. Holder............................................................ S-20
1983 Indenture............................................................. S-11
NYSE....................................................................... S-5
Participant................................................................ S-15
Pricing Date............................................................... S-4
Principal Amount........................................................... S-4
Projected Supplemental Redemption Amount................................... S-21
SEC........................................................................ S-2
Starting Index Value....................................................... S-5
Successor Index............................................................ S-14
Supplemental Redemption Amount............................................. S-4
Tax Distribution........................................................... S-6
Underwriter................................................................ S-25
Unit....................................................................... S-4
U.S. Holder................................................................ S-20
Withholding Agent.......................................................... S-23
</TABLE>

S-26
<PAGE>

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

[LOGO]

2,500,000 UNITS

MERRILL LYNCH & CO., INC.

MERRILL LYNCH EUROFUND MARKET INDEX
TARGET-TERM SM SECURITIES
DUE FEBRUARY , 2006
"MITTS(R) SECURITIES"

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

PROSPECTUS SUPPLEMENT

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

MERRILL LYNCH & CO.

AUGUST , 1998

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

Who Should Consider MITTS Securities?

Since the MITTS Securities offered hereby are tied to the results of the
EuroFund Index, they may be appropriate for investors with specific investment
horizons who seek to participate in the potential appreciation of European
stocks as represented by the EuroFund Index, and who want principal protected at
maturity.

In Particular, MITTS Securities May Be Appropriate for Investors Who:

. Are seeking Protected Growth SM investments.

. Want to participate in the appreciation potential offered by equity mutual
funds but are concerned about limiting principal risk.

. Are not seeking current income. Any supplemental payment will be payable only
at maturity. Such payment will be made in delivery of Class D shares of the
EuroFund.

. Seek to add an equity fund-linked investment to balance out a portfolio
otherwise dominated by fixed income investments.

. Are willing to forego current interest rates in order to seek higher potential
longer term results.

The MITTS Securities offering is made by the attached Prospectus and Prospectus
Supplement only, which provide a description of the issuer and the securities,
including details on risks associated with an investment in MITTS Securities.

[LOGO] Merrill Lynch

MITTS is a registered service mark and Market Index Target-Term Securities and
Protected Growth are service marks owned by Merrill Lynch & Co., Inc.