MERRILL LYNCH INDEX TRUST
POS AM, 1998-03-31
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<PAGE>
 
   
    As filed with the Securities and Exchange Commission on March 31, 1998
    
                                                              File No. 811-7885
                                                              
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                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

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

                                    FORM N-1A

                             REGISTRATION STATEMENT

                                      UNDER

                       THE INVESTMENT COMPANY ACT OF 1940                [ ]

   
                                AMENDMENT NO. 2                          [X]
    

                        (Check appropriate box or boxes)

                            MERRILL LYNCH INDEX TRUST
               (Exact Name of Registrant as Specified in Charter)

                 P.O. Box 9011, Princeton, New Jersey 08543-9011
                    (Address of Principal Executive Offices)

                                 (609) 282-2800
              (Registrant's Telephone Number, including Area Code)

                                  ARTHUR ZEIKEL
                                    Box 9011
                        Princeton, New Jersey 08543-9011
                     (Name and Address of Agent for Service)


                                   Copies to:

        Counsel for the Fund:          and
        JOEL H. GOLDBERG, Esq.                      PHILIP L. KIRSTEIN, Esq.
Shereff, Friedman, Hoffman & Goodman, LLP        Merrill Lynch Asset Management
         919 Third Avenue                               P.O. Box 9011
      New York, New York 10022                 Princeton, New Jersey 08543-9011
<PAGE>
 
                                EXPLANATORY NOTE


         This Registration Statement has been filed by the Registrant pursuant
to Section 8(b) of the Investment Company Act of 1940, as amended (the
"Investment Company Act"). However, beneficial interests in the Registrant are
not being registered under the Securities Act of 1933, as amended (the "1933
Act") because such interests will be issued solely in private placement
transactions that do not involve any "public offering" within the meaning of
Section 4(2) of the 1933 Act. Investments in the Registrant may be made only by
a limited number of institutional investors, including investment companies,
common or commingled trust funds, group trusts and certain other "accredited
investors" within the meaning of Regulation D under the 1933 Act. This
Registration Statement does not constitute an offer to sell, or the solicitation
of an offer to buy, any beneficial interests in the Registrant.

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<PAGE>
 
                                     PART A


         Responses to Items 1 through 3 and 5A have been omitted pursuant to
paragraph 4 of Instruction F of the General Instructions to Form N-1A.

Item 4. General Description of Registrant.

    
         Merrill Lynch Index Trust (the "Trust") is a no-load, open-end
management investment company which was organized as a Delaware business trust
on August 28, 1996. The Trust currently consists of four separate series or
portfolios: Merrill Lynch S&P 500 Index Series ("S&P 500 Index Series"), Merrill
Lynch Small Cap Index Series ("Small Cap Index Series"), Merrill Lynch Aggregate
Bond Index Series ("Aggregate Bond Index Series") and Merrill Lynch
International Index Series ("International Index Series"), (collectively, the
"Series," and each, a "Series"). Beneficial interests in the Trust corresponding
to each Series are issued solely in private placement transactions that do not
involve any "public offering" within the meaning of Section 4(2) of the 1933
Act. Investments in each Series may be made only by a limited number of
institutional investors, including investment companies, common or commingled
trusts, group trusts, and certain other "accredited investors" within the
meaning of Regulation D under the 1933 Act ("Investing Funds"). This
Registration Statement does not constitute an offer to sell, or a solicitation
of an offer to buy, any "security" within the meaning of the 1933 Act.     

         Each of the Series is a non-diversified investment company with
different investment objectives and policies, so that investors may choose the
Series which are most appropriate to their specific needs.

    
         There can, of course, be no assurance that the respective investment
objectives of the Series can be achieved. Except for certain investment
restrictions designated as fundamental in this Part A or in Part B of this
Registration Statement, the investment objectives and policies of each Series
may be changed by the Board of Trustees of the Trust (the "Trustees") without
the approval of the investors in the respective Series. THE TRUSTEES MAY ALSO
CHANGE THE TARGET INDEX OF ANY RESPECTIVE SERIES IF THEY CONSIDER THAT A
DIFFERENT INDEX WOULD FACILITATE THE MANAGEMENT OF THE SERIES IN A MANNER WHICH
BETTER ENABLES THE SERIES TO SEEK TO REPLICATE THE TOTAL RETURN OF THE MARKET
SEGMENT REPRESENTED BY THE CURRENT INDEX.    

                INVESTMENT OBJECTIVES, POLICIES AND RESTRICTIONS

S&P 500 INDEX SERIES

   
The investment objective of the S&P 500 Index Series is to provide investment
results that, before expenses, seek to replicate the total return (i.e., the
combination of capital changes and income) of the Standard & Poor's(R) 500
Composite Stock Price Index (the "S&P 500"). Additional information about the
investment policies of the Series appears in Part B. There can be no assurance
that the investment objective of the Series will be achieved.     

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In seeking to replicate the total return of the S&P 500, Merrill Lynch Asset
Management, L.P. ("MLAM" or the "Manager") generally will allocate the Series'
investments among common stocks in approximately the same weightings as the
index. In addition, the Manager may use options and futures contracts and other
types of financial instruments relating to all or a portion of the index. The
Series may also engage in securities lending and index arbitrage. See "About
Indexing and Management of the Series - Other Types of Investments and
Investment Techniques."    

The S&P 500 is composed of the common stocks of 500 large capitalization
companies from several industrial sectors, most of which are listed on the New
York Stock Exchange Inc. A company's stock market capitalization is the total
market value of its outstanding shares. The S&P 500 represents a significant
portion of the market value of all common stocks publicly traded in the United
States.

SMALL CAP INDEX SERIES
   
The investment objective of the Small Cap Index Series is to provide investment
results that, before expenses, seek to replicate the total return (i.e., the
combination of capital changes and income) of the Russell 2000(R) Index (the
"Russell 2000"). Additional information about the investment policies of the
Series appears in Part B. There can be no assurance that the investment
objective of the Series will be achieved.    

In seeking to replicate the total return of the Russell 2000, the Manager may
not allocate the Series' investments among all of the common stocks in the
index, or in the same weightings as the index. Instead, the Series may invest in
a statistically selected sample of the stocks included in the Russell 2000 and
other types of financial instruments. The Manager may use options and futures
contracts and other types of financial instruments relating to all or a portion
of the index. The investments to be included in the Series will be selected so
that the market capitalizations, industry weightings and other fundamental
characteristics of the stocks, and of the stocks underlying or otherwise related
to the foregoing financial instruments, closely approximate those same factors
in the Russell 2000, with the objective of reducing the selected investment
portfolio's deviation from the performance of the Index (this deviation is
referred to as "tracking error"). The Series may also engage in securities
lending and index arbitrage. See "About Indexing and Management of the Series -
Other Types of Investments and Investment Techniques."

The Russell 2000 is composed of approximately 2,000 smaller-capitalization
common stocks from various industrial sectors. A company's stock market
capitalization is the total market value of its outstanding shares.

AGGREGATE BOND INDEX SERIES
    
The investment objective of the Aggregate Bond Index Series is to provide
investment results that, before expenses, seek to replicate the total return
(i.e., the combination of    

                                       4
<PAGE>
 
capital changes and income) of the Lehman Brothers Aggregate Bond Index (the
"Aggregate Bond Index"). Additional information about the investment policies of
the Series appears in Part B. There can be no assurance that the investment
objective of the Series will be achieved.

In seeking to replicate the total return of the Aggregate Bond Index, the
Manager may not allocate the Series' investments among all of the fixed-income
securities in the index, or in the same weightings as the index. Instead, the
Series may invest in a statistically selected sample of fixed-income securities
and other types of financial instruments. The Manager may use options and
futures contracts and other types of financial instruments relating to all or a
portion of the index. The investments to be included in the Series will be
selected with the objective of reducing the selected investment portfolio's
deviation from the performance of the Aggregate Bond Index (tracking error). The
Series may, from time to time, substitute a different type of bond for one
included in the index. Substitution may result in levels of interest rate,
credit or prepayment risks that differ from the levels of risks on the
securities composing the Aggregate Bond Index. See "Risk Factors - Investments
in Fixed-Income Securities." The Series may also engage in securities lending
and index arbitrage. See "About Indexing and Management of the Series - Other
Types of Investments and Investment Techniques."

The Aggregate Bond Index is composed primarily of dollar-denominated investment
grade fixed- income securities in the following major classes: U.S. Treasury and
agency securities, U.S. corporate bonds, foreign corporate bonds, foreign
sovereign debt (debt securities issued or guaranteed by foreign governments and
governmental agencies), supranational debt (debt securities issued by entities,
such as the World Bank, constituted by the governments of several countries to
promote economic development) and mortgage-backed securities with maturities
greater than one year. Corporate bonds contained in the index represent issuers
from various industrial sectors.

The Series may invest in U.S. Treasury bills, notes and bonds and other "full
faith and credit" obligations of the U.S. Government. The Series may also invest
in U.S. Government agency securities, which are debt obligations issued or
guaranteed by agencies or instrumentalities of the U.S. Government. "Agency"
securities may not be backed by the "full faith and credit" of the U.S.
Government. U.S. Government agencies may include the Federal Farm Credit Bank,
the Resolution Trust Corporation and the Government National Mortgage
Association. "Agency" obligations are not explicitly guaranteed by the U.S.
Government and so are perceived as somewhat riskier than comparable Treasury
bonds.
    
The Series' corporate fixed-income securities will be primarily of investment
grade quality -- i.e., those rated at least Baa3 by Moody's Investors Service,
Inc. ("Moody's") or BBB- by Standard & Poor's Ratings Services ("S&P"), the
equivalent by another nationally recognized statistical rating organization
("NRSRO") or, if unrated, of equal quality in the opinion of the Manager.  
Corporate fixed-income securities ranked in the fourth highest rating 
category, while considered "investment grade", have more speculative 
characteristics and are more likely to be downgraded than securities rated in 
the three highest ratings categories.  In the event that the rating of a 
security in the Series is lowered below Baa or BBB, the Series may continue to 
hold the security.  Such securities rated below investment grade are considered 
to be speculative with respect to the issuer's capacity to pay interest and
repay principal in accordance with the terms of the obligation.     

                                       5
<PAGE>
 
     
Descriptions of the ratings of fixed-income securities are contained in Appendix
B hereto.     

The Series may also invest in other instruments that "pass through" payments on
such obligations, such as collateralized mortgage obligations ("CMOs").

INTERNATIONAL INDEX SERIES
    
The investment objective of the International Index Series is to provide
investment results that, before expenses, seek to replicate the total return
(i.e., the combination of capital changes and income) of the Morgan Stanley
Capital International EAFE(R) (GDP Weighted) Index (the "EAFE Index").
Additional information about the investment policies of the Series appears in
Part B. There can be no assurance that the investment objective of the Series
will be achieved.    

   
In seeking to replicate the total return of the EAFE Index, the Manager may not
allocate the Series' investments among all of the countries, or all of the
companies within a country, represented in the EAFE Index, or in the same
weightings as the EAFE Index. Instead, the Series may invest in a statistically
selected sample of the equity securities included in the EAFE Index and other
types of financial instruments. In addition, the Manager may use options and
futures contracts and other types of financial instruments relating to all or a
portion of the EAFE Index. The investments to be included in the Series will be
selected so that the market capitalizations, industry weightings and other
fundamental characteristics of the stocks, and of the stocks underlying or
otherwise related to the foregoing financial instruments, closely approximate
those same factors in the EAFE Index, with the objective of reducing the
selected investment portfolio's deviation from the performance of the EAFE Index
(tracking error). The Series may also engage in securities lending and index
arbitrage. See "About Indexing and Management of the Series - Other Types of
Investments and Investment Techniques."     

   
The EAFE Index is composed of equity securities of companies from various
industrial sectors whose primary trading markets are located outside the United
States and which are selected from among the larger capitalization companies in
such markets. A company's stock market capitalization is the total market value
of its outstanding shares. The countries currently included in the EAFE Index
are Australia, Austria, Belgium, Denmark, Finland, France, Germany, Hong Kong,
Ireland, Italy, Japan, Malaysia, The Netherlands, New Zealand, Norway,
Singapore, Spain, Sweden, Switzerland and United Kingdom. The weighting of the
EAFE Index among these countries is based upon gross domestic product (GDP).
(Market capitalization is the basis for country weightings in another version of
the EAFE Index. Using GDP weighting tends to decrease the relative weighting of
Japan and the United Kingdom while increasing the weighting of certain European
countries, generally resulting in a more diversified EAFE Index). Portugal is 
expected to be included in the EAFE Index, effective July 1, 1998.    

ABOUT INDEXING AND MANAGEMENT OF THE SERIES


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<PAGE>
 
ABOUT INDEXING.

The Series are not managed according to traditional methods of "active"
investment management, which involve the buying and selling of securities based
upon economic, financial, and market analyses and investment judgment. Instead,
each Series, utilizing essentially a "passive" or "indexing" investment
approach, seeks to replicate, before each Series' expenses (which can be
expected to reduce the return of the Series), the total return of its respective
index.

INDEXING AND MANAGING THE SERIES.

Under normal conditions each Series will invest at least 80% of its assets
(exclusive of assets held as collateral for securities loans or as margin for
futures transactions) in securities or other financial instruments which are
contained in, or related to the securities contained in, the applicable index
(equity securities, in the case of the Merrill Lynch S&P 500 Index Series,
Merrill Lynch Small Cap Index Series and Merrill Lynch International Index
Series (the "Equity Series"), and debt securities in the case of the Merrill
Lynch Aggregate Bond Index Series (the "Fixed-Income Series")).

Because each Series seeks to replicate the total return of its respective index,
generally the Manager will not attempt to judge the merits of any particular
security as an investment but will seek only to replicate the total return of
the securities in the relevant index. However, the Manager may omit or remove a
security which is included in an index from the portfolio of a Series if,
following objective criteria, the Manager judges the security to be
insufficiently liquid or believes the merit of the investment has been
substantially impaired by extraordinary events or financial conditions.

   
In managing the Equity Series, the Manager may employ index arbitrage. Index
arbitrage involves the sale of a replicating selection, or "basket," of stocks
with the simultaneous purchase of an equivalent dollar value of related futures
contracts, or alternatively the purchase of such an equity basket with a
simultaneous sale of related futures contracts. This technique is designed to
take advantage of a possible mispricing which could arise between the securities
market and the futures market.      


In addition, the Manager may acquire certain financial instruments based upon
individual securities or upon one or more baskets of securities (which basket
may be based upon a target index ). Certain of these instruments may represent
an indirect ownership interest in such securities or baskets. Others may provide
for the payment to a Series or by a Series of amounts based upon the performance
(positive, negative or both) of a particular security or basket. The Manager
will select such instruments when it believes that the use of the instrument
will correlate substantially with the expected total return of a target security
or index. In connection with the use of such instruments, the Manager may enter
into short sales in an effort to adjust the weightings of particular securities
represented in the basket to more accurately reflect such securities' weightings
in the target index.

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<PAGE>
 
Each Series' ability to replicate the total return of its respective index may
be affected by, among other things, transaction costs, administration and other
expenses incurred by the Series, taxes (including foreign withholding taxes,
which will affect the International Index Series due to foreign tax withholding
practices), changes in either the composition of the index or the assets of a
Series, and the timing and amount of Series investor contributions and
withdrawals, if any. Under normal circumstances, it is anticipated that each
Series' total return over periods of one year and longer will, on a gross basis
and before taking into account expenses, be within 5 basis points (a basis point
is one one-hundredth of one percent (0.01%)) for the S&P 500 Index Series, 100
basis points for the Small Cap Index Series, 150 basis points for the
International Index Series, and 25 basis points for the Aggregate Bond Index
Series, of the total return of the applicable indices. There can be no
assurance, however, that these levels of correlation will be achieved. In the
event that this correlation is not achieved over time, the Trustees of the Trust
will consider alternative strategies for the Series.

OTHER TYPES OF INVESTMENTS AND INVESTMENT TECHNIQUES.

Cash Management. Generally, the Manager will employ futures and options on
futures to provide liquidity necessary to meet anticipated redemptions or for
day-to-day operating purposes. However, if considered appropriate in the opinion
of the Manager, a portion of a Series' assets may be invested in certain types
of instruments with remaining maturities of 397 days or less for liquidity
purposes. Such instruments would consist of: (i) obligations of the U.S.
Government, its agencies, instrumentalities, authorities or political
subdivisions ("U.S. Government Securities"); (ii) other fixed-income securities
rated Aa or higher by Moody's or AA or higher by S&P or, if unrated, of
comparable quality in the opinion of the Manager; (iii) commercial paper; (iv)
bank obligations, including negotiable certificates of deposit, time deposits
and bankers' acceptances; and (v) repurchase agreements. At the time the Series
invests in commercial paper, bank obligations or repurchase agreements, the
issuer or the issuer's parent must have outstanding debt rated Aa or higher by
Moody's or AA or higher by S&P or outstanding commercial paper, bank obligations
or other short-term obligations rated Prime-1 by Moody's or A-1 by S&P; or, if
no such ratings are available, the instrument must be of comparable quality in
the opinion of the Manager.

   
Portfolio Strategies Involving Futures, Options, Swaps and Indexed Instruments.
Each Series will also utilize options, futures, options on futures, swaps and
other indexed instruments. Futures and options on futures may be employed to
provide liquidity as described in the preceding paragraph, and may also be
employed in connection with a Series' index arbitrage strategies. Futures,
options on futures, swaps and other indexed instruments may be employed as a
proxy for a direct investment in securities underlying the Series' index. In
addition, the Merrill Lynch International Index Series may engage in futures
contracts on foreign currencies in connection with certain foreign securities
transactions.     

                                       8
<PAGE>
 
The Manager will choose among the foregoing instruments based on its judgment of
how best to meet each Series' goals. In connection therewith, the Manager will
assess such factors as current and anticipated securities prices, relative
liquidity and price levels in the options, futures and swap markets compared to
the securities markets, and the Series' cash flow and cash management needs.

The Series' use of the foregoing instruments and the associated risks are
described in detail in Appendix A attached to this Part A.

Foreign Exchange Transactions. The International Index Series may engage in
futures contracts on foreign currencies and foreign currency forward and spot
transactions in connection with transactions or anticipated transactions in
securities denominated in foreign currencies. Specifically, the Series may
purchase or sell a currency to settle a security transaction or sell a currency
in which the Series has received or anticipates receiving a dividend or
distribution.

OTHER INVESTMENT POLICIES AND PRACTICES.

    
Illiquid Investments. Each of the Series may invest up to 15% of its net assets
in illiquid investments. Pursuant to that restriction each Series may not invest
in instruments that cannot be readily resold because of legal or contractual
restrictions, that cannot otherwise be marketed, redeemed, put to the issuer or
a third party, which do not mature within seven days, or which the Trustees have
not determined to be liquid, if, regarding all such instruments, more than 15%
of its net assets, taken at market value, would be invested in such instruments.
     
   
Each Series may purchase, without regard to the above limitation, securities
that are not registered under the Securities Act of 1933(the "Securities Act")
but that can be offered and sold to "qualified institutional buyers" under Rule
144A under the Securities Act, provided that the Trustees, or the Manager
pursuant to guidelines adopted by the Trustees, continuously determines, based
on the trading markets for the specific Rule 144A security, that it is liquid.
The Trustees, however, will retain oversight and are ultimately responsible for
these determinations. The Trustees monitor each Series' investments in these
securities, focusing on such factors, among others, as valuation, liquidity and
availability of information. This investment practice could have the effect of
increasing the level of illiquidity in each Series to the extent that qualified
institutional buyers become for a time uninterested in purchasing these
securities.    

Repurchase Agreements. Each Series may invest in securities pursuant to
repurchase agreements. Repurchase agreements may be entered into only with a
member bank of the Federal Reserve System, primary dealers in U.S. Government
securities, or an affiliate thereof, or with other entities which the Manager
otherwise deems to be creditworthy. Under repurchase agreements, the
counterparty agrees, upon entering into the contract, to repurchase the security
from the Series at a mutually agreed upon time and price in a specified
currency, thereby determining the 

                                       9
<PAGE>
 
yield during the term of the agreement. This results in a fixed rate of return
insulated from market fluctuations during such period although it may be
affected by currency fluctuations. In the event of default by the seller under a
repurchase agreement the Series may suffer time delays and incur costs or
possible losses in connection with disposition of the collateral. Repurchase
agreements maturing in more than seven days are deemed illiquid by the
Securities and Exchange Commission and are therefore subject to the Series'
investment restrictions limiting investments in securities that are not readily
marketable to 15% of the Series' net assets.

    
Lending of Portfolio Securities. To the extent permitted by law, each Series may
from time to time lend securities from its portfolio to banks, brokers and other
financial institutions and receive collateral in cash or securities issued or
guaranteed by the United States government. Such collateral will be maintained
at all times in an amount equal to at least 100% of the current market value of
the loaned securities. Each Series' policy concerning lending is fundamental and
it may not be changed without the approval of the holders of a majority of the
Series' outstanding voting securities, as defined in the Investment Company Act.
During the period of such a loan, the Series receives the income on the loaned
securities and either receives the income on the collateral or other
compensation, i.e., negotiated loan premium or fee, for entering into the loan
and thereby increases its yield. In the event that the borrower defaults on its
obligation to return borrowed securities, because of insolvency or otherwise,
the Series could experience delays and costs in gaining access to the collateral
and could suffer a loss to the extent that the value of the collateral falls
below the market value of the borrowed securities. Presently, no Series intends
to lend portfolio securities representing in excess of 33 1/3% of its total 
assets.     
    
When-Issued Securities and Delayed Delivery Transactions. The Aggregate Bond
Index Series may purchase securities on a when-issued basis, and it may purchase
or sell securities for delayed delivery. These transactions occur when
securities are purchased or sold by the Series with payment and delivery taking
place in the future to secure what is considered an advantageous yield and price
to the Series at the time of entering into the transaction. Although the
Aggregate Bond Index Series has not established any limit on the percentage of
its assets that may be committed in connection with such transactions, the
Aggregate Bond Index Series will maintain a segregated account with its
custodian of liquid securities in an aggregate amount equal to the amount of its
commitment in connection with such purchase transactions.    
   
Dollar Rolls. The Aggregate Bond Index Series may enter into dollar rolls, in
which the Aggregate Bond Index Series will sell securities for delivery in the
current month and simultaneously contract to repurchase substantially similar
(the same type and coupon) securities on a specified future date from the same
party. During the roll period, the Aggregate Bond Index Series forgoes principal
and interest paid on the securities sold. The Aggregate Bond Index Series is
compensated by the difference between the current sales price and the forward
price for the future purchase (often referred to as the "drop") as well as by
the interest earned on the cash proceeds of the initial sale.    

                                       10
<PAGE>
 
   
Dollar rolls involve the risk that the market value of the securities subject to
the Aggregate Bond Index Series' forward purchase commitment may decline below
the price of the securities the Aggregate Bond Index Series has sold. In the
event the buyer of the securities files for bankruptcy or becomes insolvent, the
Aggregate Bond Index Series' use of the proceeds of the current sale portion
of the transaction may be restricted pending a determination by the other party,
or its trustee or receiver, whether to enforce the Aggregate Bond Index Series'
obligation to purchase the similar securities in the forward transaction. Dollar
rolls are speculative techniques which can be deemed to involve leverage. The
Aggregate Bond Index Series will establish a segregated account with its
custodian in which it will maintain liquid securities in an aggregate amount
equal to the amount of the forward commitment. The Aggregate Bond Index Series
will engage in dollar roll transactions to enhance return and not for the
purpose of borrowing. Each dollar roll transaction is accounted for as a sale of
a portfolio security and a subsequent purchase of a substantially similar
security in the forward market.    

    
Standby Commitment Agreements. The Aggregate Bond Index Series may from time to
time enter into standby commitment agreements. Such agreements commit the
Aggregate Bond Index Series, for a stated period of time, to purchase a stated
amount of a fixed income security which may be issued and sold to the Aggregate
Bond Index Series at the option of the issuer. The price and coupon of the
security is fixed at the time of the commitment. At the time of entering into
the agreement , the Aggregate Bond Index Series is paid a commitment fee,
regardless of whether or not the security is ultimately issued. The Aggregate
Bond Index Series will enter into such agreements only for the purpose of
investing in the security underlying the commitment at a yield and price which
is considered advantageous to the Series. The Aggregate Bond Index Series will
not enter into a standby commitment with a remaining term in excess of 90 days
and will limit its investment in such commitments so that the aggregate purchase
price of the securities subject to such commitments, together with the value of
all other illiquid securities, will not exceed 15% of its total assets taken at
the time of acquisition of such commitment or security. The Aggregate Bond Index
Series will at all times maintain a segregated account with its custodian of
liquid securities in an aggregate amount equal to the purchase price of the
securities underlying the commitment.    

There can be no assurance that the securities subject to a standby commitment
will be issued and the value of the security, if issued, on the delivery date
may be more or less than its purchase price. Since the issuance of the security
underlying the commitment is at the option of the issuer, the Aggregate Bond
Index Series may bear the risk of a decline in the value of such security and
may not benefit from an appreciation in the value of the security during the
commitment period.

The purchase of a security subject to a standby commitment agreement and the
related commitment fee will be recorded on the date on which the security can
reasonably be expected to be issued, and the value of the security will
thereafter be reflected in the calculation of the Aggregate Bond Index Series'
net asset value. The cost basis of the security will be adjusted by the amount
of the commitment fee. In the event the security is not issued, the commitment
fee will be recorded as income on the expiration date of the standby commitment.

Short Sales. In connection with the use of certain instruments based upon or
consisting of one or more baskets of securities, the Manager may sell a security
a Series does not own, or in an amount greater than the Series owns (i.e., make
short sales). Such transactions will be 


                                       11
<PAGE>
 
used only in an effort to adjust the weightings of particular securities
represented in the basket to reflect such securities' weightings in the target
index. The Manager will not employ short sales in reflection of the Manager's
outlook for the securities markets or for the performance of the securities sold
short. Generally, to complete a short sale transaction, the Series will borrow
the security to make delivery to the buyer. The Series is then obligated to
replace the security borrowed. The price at the time of replacement may be more
or less than the price at which the security was sold by the Series. Until the
security is replaced, the Series is required to pay to the lender any interest
which accrues during the period of the loan. To borrow the security, the Series
may be required to pay a premium which would increase the cost of the security
sold. The proceeds of the short sale will be retained by the broker to the
extent necessary to meet margin requirements until the short position is closed
out. Until the Series replaces the borrowed security, it will (a) maintain in a
segregated account with its custodian cash or liquid securities at such a level
that the amount deposited in the account plus the amount deposited with the
broker as collateral will equal the current market value of the security sold
short or (b) otherwise cover its short position.

INVESTMENT RESTRICTIONS.

    
Each Series has adopted a number of policies and restrictions which are
described below and in Part B. A Series' investment policies and restrictions
are not fundamental policies unless otherwise specified in this Part A or in
Part B. Any restriction or policy that is not fundamental may be changed without
investor approval. Fundamental policies may not be changed without the approval
of the holders of a majority of the respective Series' outstanding voting
securities defined in the Investment Company Act.     

The Trustees may change the target index of any respective series if they
consider that a different index would facilitate the management of the Series in
a manner which better enables the Series to seek to replicate the total return
of the market segment represented by the current index.

Each Series is classified as a non-diversified fund under the Investment Company
Act and is not subject to the diversification requirements of the Investment
Company Act. Accordingly, any Series may invest more than 5% of the value of its
assets in the obligations of a single issuer. Under the Declaration of Trust,
each Series is to be managed in compliance with the provisions of Subchapter M
of the Internal Revenue Code of 1986, as amended (the "Code"), applicable to
regulated investment companies ("RICs") as though such requirements were
applicable to the Series. Thus, consistent with its investment objectives, each
Series will meet the income and diversification of assets tests of the Code
applicable to RICs. Those requirements include limiting investments so that at
the close of each quarter of the taxable year (i) not more than 25% of the
market value of the Series' total assets are invested in the securities of a
single issuer, or any two or more issuers which are controlled by the Series and
engaged in the same, similar or related businesses, and (ii) with respect to 50%
of the market value of its total assets, not more than 5% 

                                       12
<PAGE>
 
of the market value of its total assets are invested in the securities of a
single issuer, and the Series does not own more than 10% of the outstanding
voting securities of a single issuer. The U.S. Government, its agencies and
instrumentalities are not included within the definition of "issuer" for
purposes of the diversification requirements of the Code.

Among the more significant fundamental restrictions, a Series may not invest
more than 25% of its total assets (taken at market value at the time of each
investment) in the securities of issuers in any particular industry (excluding
the U.S. Government and its agencies and instrumentalities); provided, that in
replicating the weighting of a particular industry in its target index, a Series
may invest more than 25% of its total asssets in securities of issuers in that
industry.

RISK FACTORS

Cash Flows; Expenses. The ability of each Series to satisfy its investment
objective depends to some extent on the Manager's ability to manage cash flow
(primarily from purchases and redemptions and distributions from the Series'
investments). The Manager will make investment changes to a Series' portfolio to
accommodate cash flow while continuing to seek to replicate the total return of
the Series' target index. Investors should also be aware that the investment
performance of each index is a hypothetical number which does not take into
account brokerage commissions and other transaction costs, custody and other
costs of investing, which will be borne by the Series. Finally, since each
Series seeks to replicate the total return of its target index, the Manager
generally will not attempt to judge the merits of any particular security as an
investment.

   
Options, Futures, Swaps and Indexed Instruments. The Manager expects to use
options, futures, options on futures, swaps and indexed instruments as described
above under "About Indexing and Management of the Series - Other Types of
Investments and Techniques - Portfolio Strategies Involving Futures, Options,
Swaps and Indexed Instruments." Use of such instruments may involve investment
risks and transaction costs to which the Series would not be subject absent the
use of these instruments. A discussion of these instruments is contained in
Appendix A to this Part A.    

Investment in Foreign Securities. Investments on an international basis involve
certain risks not typically involved in domestic investments, including
fluctuations in foreign exchange rates, future political and economic
developments, and the possible imposition of exchange controls or other foreign
or U.S. governmental laws or restrictions applicable to such investments.
Securities prices in different countries are subject to different economic,
financial, political and social factors. Moreover, individual foreign economies
may differ favorably or unfavorably from the United States economy in such
respects as growth of gross domestic product, rate of inflation, capital
reinvestment, resources, self-sufficiency and balance of payments position.
Also, it is anticipated that most of the foreign securities held by a Series
will not be registered with the Securities and Exchange Commission nor will the
issuers thereof be subject to the reporting requirements of 


                                       13
<PAGE>
 
such agency. In addition, foreign investors such as the Series may be subject to
withholding taxes in certain countries, which may reduce the returns of the
Series.
   
Since the International Index Series will invest heavily in securities
denominated or quoted in currencies other than the United States dollar, changes
in foreign currency exchange rates will affect the value of securities in the
Series' portfolio and the unrealized appreciation or depreciation of investments
so far as United States investors are concerned. Currencies of certain foreign
countries may be volatile and therefore may affect the value of securities
denominated in such currencies. Changes in foreign currency exchange rates
relative to the United States dollar will affect the United States dollar value
of the Series' assets denominated in that currency and the return on such
assets. The rate of exchange between the dollar and other currencies is
determined by forces of supply and demand in the foreign exchange markets. These
forces are, in turn, affected by the international balance of payments, the
level of interest and inflation rates and other economic and financial
conditions, government intervention, speculation and other factors.     

    
Investment in Fixed-Income Securities. Because the Merrill Lynch Aggregate Bond
Index Series will invest in fixed-income securities, it will be subject to the
general risks inherent in such securities, primarily interest rate risk, credit
risk and prepayment risk.     

Interest rate risk is the potential for fluctuations in bond prices due to
changing interest rates. As a rule bond prices vary inversely with interest
rates. If interest rates rise, bond prices generally decline; if interest rates
fall, bond prices generally rise. In addition, for a given change in interest
rates, longer-maturity bonds generally fluctuate more in price than
shorter-maturity bonds. To compensate investors for these larger fluctuations,
longer-maturity bonds usually offer higher yields than shorter-maturity bonds,
other factors, including credit quality, being equal. These basic principles of
bond prices also apply to U.S. Government Securities. A security backed by the
"full faith and credit" of the U.S. Government is guaranteed only as to its
stated interest rate and face value at maturity, not its current market price.
Just like other fixed-income securities, government-guaranteed securities will
fluctuate in value when interest rates change.

Credit risk is the possibility that an issuer of securities held by the Series
will be unable to make payments of either interest or principal or will be
perceived to have a diminished capacity to make such payments in the future. The
credit risk of the Series is a function of the diversification and credit
quality of its underlying securities.

   
The Aggregate Bond Index Series may also be exposed to event risk, which
includes the possibility that fixed-income securities held by the Aggregate Bond
Index Series may suffer a substantial decline in credit quality and market value
due to issuer restructurings. Certain restructurings such as mergers, leveraged
buyouts, takeovers or similar events, are often financed by a significant
expansion of corporate debt. As a result of the added debt burden, the credit
quality and market value of a firm's existing debt securities may decline
significantly. Other types of restructurings (such as corporate spinoffs or
privatizations of governmental or agency borrowers or the termination of express
or implied governmental credit support) may also result in decreased credit
quality of a particular issuer.     

                                       14
<PAGE>
 
    
Prepayment risk is the possibility that the principal of the mortgage loans
underlying mortgage- backed securities may be prepaid at any time. As a general
rule, prepayments increase during a period of falling interest rates and
decrease during a period of rising interest rates. As a result of prepayments,
in periods of declining interest rates the Aggregate Bond Index Series may be
required to reinvest its assets in securities with lower interest rates. In
periods of increasing interest rates, prepayments generally may decline, with
the effect that the mortgage-backed securities held by the Aggregate Bond Index
Series may exhibit price characteristics of longer-term debt securities.     
    
The corporate substitution strategy used by the Aggregate Bond Index Series
(discussed above) may increase or decrease the Aggregate Bond Index Series'
exposure to the foregoing risks relative to those of the Aggregate Bond
Index.    
   
Investments in Small Companies. The Small Cap Index Series will invest primarily
in securities of smaller capitalization issuers. Investments in securities of
smaller capitalization issuers involve special considerations and risks not
typically associated with investments in securities of larger capitalization
issuers, including an issuer's limited product lines, markets or financial
resources, or dependence on a limited management group. In addition, many
smaller capitalization stocks trade less frequently and in smaller volume, and
may be subject to more abrupt or erratic price movements, than stocks of larger
companies. The securities of smaller companies may also be more sensitive to
market changes than the securities of larger companies.     
   
Portfolio Turnover. Although each Series will use a passive, indexing approach
to investing, each Series may engage in a substantial number of portfolio
transactions. The rate of portfolio turnover will be a limiting factor when the
Manager considers whether to purchase or sell securities for a Series only to
the extent that the Manager will consider the impact of transaction costs on a
Series' tracking error. Changes in the securities comprising a Series' index
will tend to increase that Series' portfolio turnover rate, as the Manager
restructures the Series' holdings to reflect the changes in the index. The
portfolio turnover rate is, in summary, the percentage computed by dividing the
lesser of a Series' purchases or sales of securities by the average net asset
value of the Series. High portfolio turnover involves correspondingly greater
brokerage commissions for a Series investing in equity securities and other
transaction costs which are borne directly by a Series. A high portfolio
turnover rate may also result in the realization of taxable capital gains,
including short-term capital gains taxable at ordinary income rates.     

ADDITIONAL INFORMATION CONCERNING THE INDICES.

S&P 500. "Standard & Poor's(R)", "S&P(R)", "S&P 500(R)", "Standard & Poor's
500", and "500" are trademarks of The McGraw-Hill Companies, Inc. and have been
licensed for use by the Trust. The S&P 500 Index Series is not sponsored,
endorsed, sold or promoted by Standard & Poor's, a


                                       15
<PAGE>
 
    
division of the McGraw Hill Companies, Inc. ("Standard & Poor's"). Standard &
Poor's makes no representation regarding the advisability of investing in the
Series. Standard & Poor's makes no representation or warranty, express or
implied, to the owners of shares of the Series or any member of the public
regarding the advisability of investing in securities generally or in the Series
particularly or the ability of the S&P 500 to track general stock market
performance. Standard & Poor's only relationship to the Series is the licensing
of certain trademarks and trade names of Standard & Poor's and of the S&P 500
which is determined, composed and calculated by Standard & Poor's without regard
to the Series. Standard & Poor's has no obligation to take the needs of the
Series or the owners of shares of the Series into consideration in determining,
composing or calculating the S&P 500 Index. Standard & Poor's is not responsible
for and has not participated in the determination of the prices and amount of
the Series or the timing of the issuance of sale of shares of the Series or in
the determination or calculation of the equation by which the Series is to be
converted into cash. Standard & Poor's has no obligation or liability in
connection with the administration, marketing or trading of the Series.     

Standard & Poor's does not guarantee the accuracy and/or the completeness of the
S&P 500 Index or any data included therein and Standard & Poor's shall have no
liability for any errors, omissions, or interruptions therein. Standard & Poor's
makes no warranty, express or implied, as to results to be obtained by the
Series, owners of shares of the Series, or any other person or entity from the
use of the S&P 500 Index or any data included therein. Standard & Poor's makes
no express or implied warranties and expressly disclaims all warranties of
merchantability or fitness for a particular purpose or use with respect to the
S&P 500 Index or any data included therein. Without limiting any of the
foregoing, in no event shall Standard & Poor's have any liability for any
special, punitive, indirect, or consequential damages (including lost profits),
even if notified of the possibility of such damages.

Russell 2000. The Merrill Lynch Small Cap Index Series is not promoted,
sponsored or endorsed by, nor in any way affiliated with Frank Russell Company.
Frank Russell Company is not responsible for and has not reviewed the Series nor
any associated literature or publications and Frank Russell Company makes no
representation or warranty, express or implied, as to their accuracy, or
completeness, or otherwise.

Frank Russell Company reserves the right, at any time and without notice, to
alter, amend, terminate or in any way change the Russell 2000(R) Index. Frank
Russell Company has no obligation to take the needs of any particular fund or
its participants or any other product or person into consideration in
determining, composing or calculating the Index.
   
Frank Russell Company's publication of the Russell 2000(R) Index in no way
suggests or implies an opinion by Frank Russell Company as to the attractiveness
or appropriateness of investment in any or all securities upon which the Russell
2000 is based. Frank Russell     

                                       16
<PAGE>
 
   
Company makes no representation, warranty, or guarantee as to the accuracy,
completeness, reliability, or otherwise of the Russell 2000 or any data included
in the Russell 2000. Frank Russell Company makes no representation or warranty
regarding the use, or the results of use, of the Russell 2000 or any data
included therein, or any security (or combination thereof) comprising the
Russell 2000. Frank Russell Company makes no other express or implied warranty,
and expressly disclaims any warranty, of any kind, including, without means of
limitation, any warranty of merchantability or fitness for a particular purpose
with respect to the Russell 2000 or any data or any security (or combination
thereof) included therein.     

    
EAFE Index. The EAFE Index is the exclusive property of Morgan Stanley & Co.
Incorporated ("Morgan Stanley"). The EAFE Index is a service mark of Morgan
Stanley Group Inc. and has been licensed for use by MLAM and certain of its
affiliates.    
   
The International Index Series is not sponsored, endorsed, sold or promoted by
Morgan Stanley. Morgan Stanley makes no representation or warranty, express or
implied, to the owners of shares of the International Index Series or any member
of the public regarding the advisability of investing in securities generally or
in the International Index Series particularly or the ability of the EAFE Index
to track general stock market performance. Morgan Stanley is the licensor of
certain trademarks, service marks and trade names of Morgan Stanley and of the
EAFE Index. Morgan Stanley has no obligation to take the needs of the
International Index Series or the owners of shares of the International Index
Series into consideration in determining, composing or calculating the EAFE
Index. Morgan Stanley is not responsible for and has not participated in the
determination of the timing of, prices at, or quantities of shares of the
International Index Series to be issued or in the determination or calculation
of the equation by which shares of the International Index Series are redeemable
for cash. Morgan Stanley has no obligation or liability to owners of shares of
the International Index Series in connection with the administration, marketing
or trading of the International Index Series.     
   
Although Morgan Stanley shall obtain information for inclusion in or for use in
the calculation of the EAFE Index from sources which Morgan Stanley considers
reliable, Morgan Stanley does not guarantee the accuracy and/or the completeness
of the EAFE Index or any data included therein. Morgan Stanley makes no
warranty, express or implied, as to results to be obtained by licensee,
licensee's customers and counterparties, owners of the shares of the
International Index Series, or any other person or entity from the use of the
EAFE Index or any data included therein in connection with the rights licensed
therefrom or for any other use. Morgan Stanley makes no express or implied
warranties, and hereby expressly disclaims all warranties of merchantability or
fitness for a particular purpose with respect to the EAFE Index or any data
included therein. Without limiting any of the foregoing, in no event shall
Morgan Stanley have any liability for any direct, indirect, special, punitive,
consequential or any other damages (including lost profits) even if notified of
the possibility of such damages.     

Item 5. Management of the Series.

                                       17
<PAGE>
 
The Trustees of the Trust are responsible for the general oversight of the
conduct of the Trust's business.

INVESTMENT MANAGER.

   
The Trust on behalf of each Series has entered into an investment management
agreement (the "Management Agreement") with the Manager. The Manager, with
offices at 800 Scudders Mill Road, Plainsboro, New Jersey (mailing address: Box
9011, Princeton, New Jersey 08543-9011) acts as manager for the Trust and each
Series and provides them with management and investment advisory services. The
Manager is owned and controlled by Merrill Lynch & Co., Inc. ("ML & Co."), a
financial services holding company and the parent of Merrill Lynch. The Asset
Management Group of ML&Co. (which includes the Investment Adviser) acts as the
manager for more than 100 other registered investment companies. The Manager and
FAM also offer portfolio management services to individuals and institutions. As
of February, 1998, the Asset Management Group had a total of approximately
$476 billion in investment company and other portfolio assets under management.
This amount includes assets managed for certain affiliates of MLAM.    
    
The Trust will pay the Manager a monthly fee with respect to each Series equal
to a percentage of the average daily net assets of that Series at the rates
described below. In addition, the Management Agreement obligates the Trust to
pay certain expenses incurred in its operations including, among other things,
the investment advisory fee, legal and audit fees, registration fees,
unaffiliated Trustees' fees and expenses, custodian and transfer agency fees,
accounting costs, the costs of issuing and redeeming shares and certain of the
costs of printing proxies, shareholder reports, prospectuses and statements of
additional information. For the fiscal period April 3, 1997 (commencement of
operations) to December 31, 1997, the total fee paid by the S&P 500 Index Series
to the Manager was $148,645, all of which was voluntarily waived, and the total
fee paid by the Aggregate Bond Index Series to the Manager was $88,609, of which
$37,562 was voluntarily waived (based on average daily net assets of
approximately $398.9 million and $197.4 million, respectively). For the fiscal
period April 9, 1997 (commencement of operations) to December 31, 1997, the
total fee paid by the Small Cap Index Series to the Manager was $36,425, all of
which was voluntarily waived, and the total fee paid by the International Index
Series to the Manager was $100,102, of which $35,546 was voluntarily waived
(based on average daily net assets of approximately $62.5 million and $124.9
million, respectively). Accounting services are provided to the Trust by the
Manager, and the Trust reimburses the Manager for its costs in connection with
such services on a semi-annual basis. For the fiscal period April 3, 1997
(commencement of operations) to December 31, 1997, the amount of such
reimbursement for the S&P 500 Index Series and the Aggregate Bond Index Series
was $192,752 and $113,606, respectively. For the fiscal period April 9, 1997
(commencement of operations) to December 31, 1997, the amount of such
reimbursement for the Small Cap Index Series and the International Index Series
was $31,090 and $68,823, respectively.    
    
For the fiscal period April 3, 1997 (commencement of operations) to December 31,
1997, the ratio of total expenses to average net assets was .17% and .18% for
the S&P 500 Index Series and the Aggregate Bond Index Series, respectively. For
the fiscal period April 9, 1997 (commencement of operations) to December 31,
1997, the ratio of total expenses to average net assets was .29% and .36% for
the Small Cap Index Series and the International Index Series, 
respectively.     

The following table sets forth the annual management fee rates to be paid by
each Series, expressed as a percentage of the Series' average daily net assets.

<TABLE>
<CAPTION>
           Name of Series                                  Total Management Fee
           --------------                                  --------------------
<S>                                                               <C>   
Merrill Lynch S & P 500 Index Series...............................0.05%
Merrill Lynch Small Cap Index Series...............................0.08%
Merrill Lynch Aggregate Bond Index Series..........................0.06%
Merrill Lynch International Equity Index Series....................0.11%
</TABLE>
    
Eric Mitofsky is primarily responsible for the day-to-day management of the
investments of the S&P 500 Index Series, Small Cap Index Series and
International Index Series. Mr. Mitofsky has been associated with MLAM since
1987, has been a First Vice President of MLAM since 1997 and was a Vice
President of MLAM from 1992 to 1997. Jay C. Harbeck and Gregory M. Maunz are
primarily responsible for the day-to-day management of the investments of     



                                       18
<PAGE>

     
the Merrill Lynch Aggregate Bond Index Series. Mr. Harbeck has been a First Vice
President of MLAM since 1997 and was a Vice President of MLAM from 1986 to
1997, and Mr. Maunz has been a First Vice President of MLAM since 1997 and was a
Vice President of MLAM from 1985 to 1997.    

CUSTODY ARRANGEMENTS.

    
Merrill Lynch Trust Company, 800 Scudders Mill Road, Plainsboro, New Jersey,
acts as custodian of the assets of S&P 500 Index Series, Small Cap Index Series
and Aggregate Bond Index Series. State Street Bank and Trust Company ("State
Street"), P.O. Box 351, Boston Massachusetts 02101 acts as custodian of the
assets of International Index Series. Under its contract with the Trust, State
Street is authorized to establish separate accounts in foreign currencies and to
cause foreign securities owned by the International Index Series to be held in
its offices outside the United States and with certain foreign banks and
securities depositories. Each Custodian is responsible for safeguarding and
controlling cash and securities, handling the receipt and delivery of securities
and collecting interest and dividends on investments.     

Item 6. Capital Stock and Other Securities.

Investors in the Trust have no preemptive or conversion rights and beneficial
interests in the Trust are fully paid and non-assessable. The Trust has no
current intention to hold annual meetings of investors, except to the extent
required by the Investment Company Act, but will hold special meetings of
investors when in the judgment of the Trustees it is necessary or desirable to
submit matters for an investor vote. Investors have under certain circumstances
(e.g., upon application and submission of certain specified documents to the
Trustees by a specified number of investors) the right to communicate with other
investors in connection with requesting a meeting of investors for the purpose
of removing one or more Trustees. Investors also have the right to remove one or
more Trustees without a meeting by a declaration in writing by a specified
number of investors. Upon liquidation of the Trust or any Series, investors
would be entitled to share, in proportion to their investment in the Trust or
Series (as the case may be), in the assets of the Trust or Series available for
distribution to investors.

The Trust is organized as a Delaware business trust and currently consists of
four Series. Each investor is entitled to a vote in proportion to its investment
in the Trust or the Series (as the case may be). Investors in any Series will
participate equally in accordance with their pro rata interests in the earnings,
dividends and assets of the particular Series. The Trust reserves the right to
create and issue interests in additional Series.

Investments in the Trust may not be transferred, but an investor may withdraw
all or any portion of its investment in any Series on any day on which the New
York Stock Exchange is open at net asset value. The complete withdrawal of any
investor from a Series will result in the dissolution of the Series unless the
remaining investors unanimously agree to continue the Series.

                                       19
<PAGE>
 
The net asset value of each Series is determined on each day during which the
New York Stock Exchange is open for trading ("Pricing Day"). This determination
is made once during each such day by deducting the amount of the Series' total
liabilities (including accrued expenses) from the value of its total assets.
Total assets consist of the value of the securities held by the Series plus cash
and other assets (including interest and dividends accrued and not yet
received).

A Series' securities which are traded on stock exchanges are valued at the last
sale price as of the close of business on the day the securities are being
valued, or, lacking any sales, at the closing bid price for long positions, and
at the last available ask price for short positions. In cases where securities
are traded on more than one exchange, the securities are valued on the exchange
designated by or under authority of the Board of Trustees as the primary market.
Securities traded in the over-the-counter market are valued at the last quoted
bid prices as at the close of trading on the New York Stock Exchange on each day
by brokers that make markets in the securities. Securities traded on the NASDAQ
national market system are valued at the last sale price prior to the time of
the valuation. Portfolio securities that are traded both in the over-the-counter
market and on a stock exchange are valued according to the broadest and most
representative market. Short positions in securities traded on the over-the-
counter market are valued at the last available ask price in the over-the-
counter market prior to the time of valuation. Other investments, including
futures contracts and related options, are stated at market value. Securities
and assets for which market quotations are not readily available are valued at
fair market value, as determined in good faith by or under the direction of the
Trustees of the Trust. See "Item 19. Purchase, Redemption and Pricing of
Securities" in Part B.

Each investor in the Trust may add to or reduce its investment in any Series on
each Pricing Day. On each Pricing Day, the value of each investor's beneficial
interest in a Series will be determined 15 minutes after the close of business
of the New York Stock Exchange (generally 4:00 p.m., New York time) by
multiplying the net asset value of the Series by the percentage, effective for
that day, that represents that investor's share of the aggregate beneficial
interests in such Series. Any additions or withdrawals, which are to be effected
on that day, will then be effected. The investor's percentage of the aggregate
beneficial interests in a Series will then be re-computed as the percentage
equal to the fraction (i) the numerator of which is the value of such investor's
investment in the Series as of the time or determination on such day plus or
minus, as the case may be, the amount of any additions to or withdrawals from
the investor's investment in the Series effected on such day, and (ii) the
denominator of which is the aggregate net asset value of the Series as of such
time on such day plus or minus, as the case may be, the amount of the net
additions to or withdrawals from the aggregate investments in the Series by all
investors in the Series. The percentage so determined will then be applied to
determine the value of the investor's interest in such Series as of 15 minutes
after the close of business of the New York Stock Exchange on the next Pricing
Day of the Series.

Under the anticipated method of operation of the Series, each Series will be
treated as a separate partnership for tax purposes and, thus, will not be
subject to any income tax. The Series have received a ruling from the Internal
Revenue Service establishing their status as partnerships. Based upon the status
of each Series as a partnership, each investor in a Series will be taxable on
its share (as determined in accordance with the governing instruments of the
Series) of such Series' ordinary income and capital gain in determining its
income tax liability. The determination of such share will be made in accordance
with the Code and Treasury Regulations promulgated thereunder.



                                       20
<PAGE>
 
It is intended that each Series' assets, income and distributions will be
managed in such a way that an investor in any Series will be able to satisfy the
requirements of Subchapter M of the Code assuming that the investor invested all
of its assets in the Series.

Investor inquiries should be made by contacting Merrill Lynch Funds Distributor,
Inc. (the "Placement Agent").

DIVIDENDS AND DISTRIBUTIONS.
    

It is the Trust's intention to distribute all of its net investment income, if
any. Dividends from such net investment income will be paid at least annually
with respect to each of the S&P 500 Index Series, Small Cap Index Series and
International Index Series. Dividends with respect to the Aggregate Bond Series
will be declared daily and paid monthly. All net realized long- or short-term
capital gains, if any, are distributed to Series interestholders at least
annually. From time to time, a Series may declare a special distribution at or
about the end of the calendar year in order to comply with certain Federal
income tax requirements. All Dividends and Distributions will be credited ot the
accounts of interestholders or paid to interestholders, in each case as the
interestholder directs.      

Item 7. Purchase of Securities.
    
YEAR 2000 ISSUES      
    
Many computer systems were designed using only two digits to designate years.
These systems may not be able to distinguish the Year 2000 from the Year 1900
(commonly known as the "Year 2000 Problem"). Like other investment companies and
financial and business organizations, the Trust could be adversely affected if
the computer systems used by the Manager or other Trust service providers do not
properly address this problem prior to January 1, 2000. The Manager has
established a dedicated group to analyze these issues and to implement any
systems modifications necessary to prepare for the Year 2000. Currently, the
Manager does not anticipate that the transition to the 21st century will have
any material impact on its ability to continue to service the Trust at current
levels. In addition, the Manager has sought assurances from the Trust's other
service providers that they are taking all necessary steps to ensure that their
computer systems will accurately reflect the Year 2000, and the Manager will
continue to monitor the situation. At this time, however, no assurance can be
given that the Trust's other service providers have anticipated every step
necessary to avoid any adverse effect on the Trust attributable to the Year 2000
Problem.    

Beneficial interests in the Trust are issued solely in private placement
transactions that do not involve any "public offering" within the meaning of
Section 4(2) of the 1933 Act. Investments in each Series of the Trust may only
be made by a limited number of institutional investors including investment
companies, common or commingled trust funds, group trusts, and certain other
"accredited investors" within the meaning of Regulation D under the 1933 Act.
This Registration Statement does not constitute an offer to sell, or the
solicitation of an offer to buy, any "security" within the meaning of the 1933
Act.

Investments in the Series will be made without a sales load. All investments are
made at net asset value next determined after an order is received by the
Series. The net asset value of each Series is determined on each Pricing Day.

There is no minimum initial or subsequent investment in each Series. However,
because each Series intends to be as fully invested at all times as is
reasonably consistent with its investment objectives and policies in order to
enhance the yield on its assets, investments must be made in federal funds
(i.e., monies credited to the account of the respective Series' custodian bank
by a Federal Reserve Bank).

Each Series reserves the right to cease accepting investments at any time or to
reject any investment order.

The Trust's placement agent is Merrill Lynch Funds Distributor, Inc.

                                       21
<PAGE>
 
Item 8. Redemption or Repurchase.

An investor in the Trust may withdraw all or a portion of its investment in any
Series on any Pricing Day at the net asset value next determined after a
withdrawal request in proper form is furnished by the investor to the Series.
The proceeds of the withdrawal will be paid by the Series normally on the
business day on which the withdrawal is effected, but in any event within seven
days. Investments in any Series of the Trust may not be transferred.

Item 9. Pending Legal Proceedings.

Not applicable.

                                       22
<PAGE>
 
                                   APPENDIX A

The Series are authorized to use certain instruments, including indexed
securities, options, futures and swaps, as described below. Such instruments,
which may be regarded as derivatives, are referred to collectively herein as
"Strategic Instruments."

INDEXED SECURITIES

The Series may invest in securities the potential return of which is based on
the change in particular measurements of value or rate (an "index"). As an
illustration, a Series may invest in a debt security that pays interest and
returns principal based on the change in the value of a securities index or a
basket of securities, or based on the relative changes of two indices. If a
Series invests in such securities, it may be subject to reduced or eliminated
interest payments or loss of principal in the event of an adverse movement in
the relevant index or indices.

OPTIONS ON SECURITIES AND SECURITIES INDICES

Purchasing Options. Each Series is authorized to purchase put options on
securities held in its portfolio or securities indices the performance of which
is substantially correlated with securities held in its portfolio. When a Series
purchases a put option, in consideration for an upfront payment (the "option
premium") the Series acquires a right to sell to another party specified
securities owned by the Series at a specified price (the "exercise price") on or
before a specified date (the "expiration date"), in the case of an option on
securities, or to receive from another party a payment based on the amount a
specified securities index declines below a specified level on or before the
expiration date, in the case of an option on a securities index. The purchase of
a put option limits the Series' risk of loss in the event of a decline in the
market value of the portfolio holdings underlying the put option prior to the
option's expiration date. If the market value of the portfolio holdings
associated with the put option increases rather than decreases, however, the
Series will lose the option premium and will consequently realize a lower return
on the portfolio holdings than would have been realized without the purchase of
the put.

Each Series is also authorized to purchase call options on securities it intends
to purchase or securities indices. When a Series purchases a call option, in
consideration for the option premium the Series acquires the right to purchase
from another party specified securities at the exercise price on or before the
expiration date, in the case of an option on securities, or to receive from
another party a payment based on the amount a specified securities index
increases beyond a specified level on or before the expiration date, in the case
of an option on a securities index. The purchase of a call option may protect
the Series from having to pay more for a security as a consequence of increases
in the market value for the security during a period when the Series is
contemplating its purchase, in the case of an option on a security, or
attempting to maintain exposure to an index prior to purchasing underlying
securities. in the case of an option on an index (an "anticipatory hedge"). In
the event the Series determines not to



                                       23
<PAGE>
 
purchase a security underlying a call option, however, the Series may lose the
entire option premium.

Each Series is also authorized to purchase put or call options in connection
with closing out put or call options it has previously sold.

Writing Options. Each Series is authorized to write (i.e., sell) call options on
securities held in its portfolio or securities indices the performance of which
is substantially replicated by securities held in its portfolio. When a Series
writes a call option, in return for an option premium the Series gives another
party the right to buy specified securities owned by the Series at the exercise
price on or before the expiration date, in the case of an option on securities,
or agrees to pay to another party an amount based on any gain in a specified
securities index beyond a specified level on or before the expiration date, in
the case of an option on a securities index. In the event the party to which a
Series has written an option fails to exercise its rights under the option
because the value of the underlying securities is less than the exercise price,
the Series will partially offset any decline in the value of the underlying
securities through the receipt of the option premium. By writing a call option,
however, a Series limits its ability to sell the underlying securities, and
gives up the opportunity to profit from any increase in the value of the
underlying securities beyond the exercise price, while the option remains
outstanding.

Each Series may also write put options on securities or securities indices. When
a Series writes a put option, in return for an option premium the Series gives
another party the right to sell to the Series a specified security at the
exercise price on or before the expiration date, in the case of an option on a
security, or agrees to pay to another party an amount based on any decline in a
specified securities index below a specified level on or before the expiration
date, in the case of an option on a securities index. In the event the party to
which the Series has written an option fails to exercise its rights under the
option because the value of the underlying securities is greater than the
exercise price, the Series will profit by the amount of the option premium. By
writing a put option, however, a Series will be obligated to purchase the
underlying security at a price that may be higher than the market value of the
security at the time of exercise as long as the put option is outstanding, in
the case of an option on a security, or make a cash payment reflecting any
decline in the index, in the case of an option on an index. Accordingly, when
the Series writes a put option it is exposed to a risk of loss in the event the
value of the underlying securities falls below the exercise price, which loss
potentially may substantially exceed the amount of option premium received by
the Series for writing the put option. A Series will write a put option on a
security or a securities index only if the Series would be willing to purchase
the security at the exercise price for investment purposes (in the case of an
option on a security) or is writing the put in connection with trading
strategies involving combinations of options -- for example, the sale and
purchase of options on the same security or index but different expiration dates
or exercise prices (a technique called a "spread").

Each Series is also authorized to sell call or put options in connection with
closing out call or put options it has previously purchased.

                                       24
<PAGE>
 
Other than with respect to closing transactions, the Series will only write call
or put options that are "covered." A call or put option will be considered
covered if a Series has segregated assets with respect to such option in the
manner described in "Risk Factors in Strategic Instruments" below. A call option
will also be considered covered if a Series owns the securities it would be
required to deliver upon exercise of the option (or, in the case of option on a
securities index, securities which substantially replicate the performance of
such index) or owns a call option, warrant or convertible instrument which is
immediately exercisable for, or convertible into, such security.

Types of Options. Each Series may engage in transactions in options on
securities or securities indices on exchanges and in the over-the-counter
("OTC") markets. In general, exchange-traded options have standardized exercise
prices and expiration dates and require the parties to post margin against their
obligations, and the performance of the parties' obligations in connection with
such options is guaranteed by the exchange or a related clearing corporation.
OTC options have more flexible terms negotiated between the buyer and seller,
but generally do not require the parties to post margin and are subject to
greater risk of counterparty default. See "Additional Risk Factors of OTC
Transactions" below.

FUTURES

Each Series may engage in transactions in futures and options thereon. Futures
are standardized, exchange-traded contracts which obligate a purchaser to take
delivery, and a seller to make delivery, of a specific amount of a commodity at
a specified future date at a specified price. No price is paid upon entering
into a futures contract. Rather, upon purchasing or selling a futures contract
the Series is required to deposit collateral ("margin") equal to a percentage
(generally less than 10%) of the contract value. Each day thereafter until the
futures position is closed, the Series will pay additional margin representing
any loss experienced as a result of the futures position the prior day or be
entitled to a payment representing any profit experienced as a result of the
futures position the prior day. The Series will further limit transactions in
futures and options on futures to the extent necessary to prevent the Series
from being deemed a "commodity pool" under regulations of the Commodity Futures
Trading Commission.

SWAPS

The Series are authorized to enter into equity swap agreements, which are OTC
contracts in which one party agrees to make periodic payments based on the
change in market value of a specified equity security, basket of equity
securities or equity index in return for periodic payments based on a fixed or
variable interest rate or the change in market value of a different equity
security, basket of securities or equity index. Swap agreements may also be used
to obtain exposure to a secrity or market without owning or taking physical
custody of securities in circumstances in which direct investment is restricted
by local law or is otherwise impractical.



                                       25
<PAGE>
 
RISK FACTORS IN STRATEGIC INSTRUMENTS

The Series intend to enter into transactions involving Strategic Instruments
only if there appears to be a liquid secondary market for such instruments or,
in the case of illiquid instruments traded in OTC transactions, such instruments
satisfy the criteria set forth below under "Additional Risk Factors of OTC
Transactions." However, there can be no assurance that, at any specific time,
either a liquid secondary market will exist for a Strategic Instrument or a
Series will otherwise be able to sell such instrument at an acceptable price. It
may therefore not be possible to close a position in a Strategic Instrument
without incurring substantial losses, if at all.

Certain transactions in Strategic Instruments (e.g., futures transactions, sales
of put options) may expose a Series to potential losses which exceed the amount
originally invested by the Series in such instruments. When a Series engages in
such a transaction, the Series will deposit in a segregated account at its
custodian liquid securities with a value at least equal to the Series' exposure,
on a mark-to-market basis, to the transaction (as calculated pursuant to
requirements of the Securities and Exchange Commission). Such segregation will
ensure that the Series has assets available to satisfy its obligations with
respect to the transaction, but will not limit the Series' exposure to loss.

ADDITIONAL RISK FACTORS OF OTC TRANSACTIONS; LIMITATIONS ON THE USE OF OTC
STRATEGIC INSTRUMENTS

Certain Strategic Instruments traded in OTC markets, including indexed
securities, swaps and OTC options, may be substantially less liquid than other
instruments in which a Series may invest. The absence of liquidity may make it
difficult or impossible for a Series to sell such instruments promptly at an
acceptable price. The absence of liquidity may also make it more difficult for
the Series to ascertain a market value for such instruments. A Series will
therefore acquire illiquid OTC instruments (i) if the agreement pursuant to
which the instrument is purchased contains a formula price at which the
instrument may be terminated or sold, or (ii) for which the Manager anticipates
the Series can receive on each business day at least two independent bids or
offers, unless a quotation from only one dealer is available, in which case that
dealer's quotation may be used.

The staff of the Securities and Exchange Commission has taken the position that
purchased OTC options and the assets underlying written OTC options are illiquid
securities. The Series have therefore adopted an investment policy pursuant to
which they will not purchase or sell OTC options (including OTC options on
futures contracts) if, as a result of such transactions, the sum of the market
value of OTC options currently outstanding which are held by the Series, the
market value of the securities underlying OTC call options currently outstanding
which have been sold by the Series and margin deposits on the Series'
outstanding OTC options exceeds 15% of the total assets of the Series, taken at
market value, together with all other assets of the Series which are deemed to
be illiquid or are otherwise not readily marketable. However, if an OTC option
is sold by the Series to a dealer in U.S. government securities recognized as a
"primary

                                       26
<PAGE>
 
dealer" by the Federal Reserve Bank of New York and the Series has the
unconditional contractual right to repurchase such OTC option at a predetermined
price, then the Series will treat as illiquid such amount of the underlying
securities as is equal to the repurchase price less the amount by which the
option is "in-the-money" (i.e., current market value of the underlying security
minus the option's exercise price).

Because Strategic Instruments traded in OTC markets are not guaranteed by an
exchange or clearing corporation and generally do not require payment of margin,
to the extent that a Series has unrealized gains in such instruments or has
deposited collateral with its counterparty the Series is at risk that its
counterparty will become bankrupt or otherwise fail to honor its obligations.
The Series will attempt to minimize the risk that a counterparty will become
bankrupt or otherwise fail to honor its obligations by engaging in transactions
in Strategic Instruments traded in OTC markets only with financial institutions
which have substantial capital or which have provided the Series with a
third-party guaranty or other credit enhancement.

    
ADDITIONAL LIMITATIONS ON THE USE OF STRATEGIC INSTRUMENTS.  

The Series may not use any Strategic Instrument to gain exposure to an asset or
class of assets that it would be prohibited by its investment restrictions from
purchasing directly.    
                                       27
<PAGE>
 
                     APPENDIX B - DESCRIPTION OF COMMERCIAL
                             PAPER AND BOND RATINGS

COMMERCIAL PAPER

   
Description of relevant commercial paper ratings of Standard & Poor's Ratings
Group ("S&P") are as follows:
    

A-1:         This highest category indicates that the degree of safety regarding
             timely payment is strong. Those issues determined to possess
             extremely strong safety characteristics are denoted with a plus (+)
             sign designation.

A-2:         Capacity for timely payment on issues with this designation is
             satisfactory. However, the relative degree of safety is not as high
             as for issues designated A-1.

A-3:         Issues carrying this designation have an adequate capacity for
             timely payment. They are, however, somewhat more vulnerable to the
             adverse effects of changes in circumstances than obligations
             carrying the higher designations.

Description of the relevant commercial paper ratings of Moody's Investors
Service, Inc. ("Moody's") are as follows:

PRIME-1:          Issuers rated Prime-1 (or supporting institutions) have a
                  superior ability for repayment of senior short-term debt
                  obligations. Prime-1 repayment ability will often be evidenced
                  by many of the following characteristics:

             --   Leading market positions in well-established industries.

             --   High rates of return on funds employed.

             --   Conservative capitalization structure with moderate reliance
                  on debt and ample asset protection.

             --   Broad margins in earnings coverage of fixed financial charges
                  and high internal cash generation.

             --   Well-established access to a range of financial markets and
                  assured sources of alternate liquidity.

PRIME-2:          Issuers rated Prime-2 (or supporting institutions) have a
                  strong ability for repayment of senior short-term debt
                  obligations. This will normally be evidenced by many of the
                  characteristics cited above but to a lesser degree.
                  Capitalization

                                       28
<PAGE>
 
                  characteristics, while still appropriate, may be more affected
                  by external conditions. Ample alternate liquidity is
                  maintained.

PRIME-3:          Issuers rated Prime-3 (or supporting institutions) have an
                  acceptable ability for repayment of senior short-term
                  obligations. The effect of industry characteristics and market
                  compositions may be more pronounced. Variability in earnings
                  and profitability may result in changes in the level of debt
                  protection measurement and may require relatively high
                  financial leverage. Adequate alternate liquidity is
                  maintained.

CORPORATE BONDS

Descriptions of the bond ratings of S&P are:

AAA --       Debt rated AAA has the highest rating assigned by Standard &
             Poor's. Capacity to pay interest and repay principal is extremely
             strong.

AA --        Debt rated AA has a very strong capacity to pay interest and repay
             principal and differs from the higher rated issues only in small
             degree.

A --         Debt rated A has a strong capacity to pay interest and repay
             principal although it is somewhat more susceptible to the adverse
             effects of changes in circumstances and economic conditions than
             debt in higher rated categories.

BBB --       Debt rated BBB is regarded as having an adequate capacity to pay
             interest and repay principal. Whereas it normally exhibits adequate
             protection parameters, adverse economic conditions or changing
             circumstances are more likely to lead to a weakened capacity to pay
             interest and repay principal for debt in this category than for
             debt in higher rated categories.

BB, B, CCC, CC or C--Debt rated BB, B, CCC, CC or C is regarded, on balance, as
predominantly speculative with respect to the issuer's capacity to pay interest
and repay principal in accordance with the terms of the obligation. While such
debt will likely have some quality and protective characteristics, these are
outweighed by large uncertainties or major risk exposures to adverse debt
conditions.

C1 --        The rating C1 is reserved for income bonds on which no interest is
             being paid.

D --         Debt rated D is in default and payment of interest and/or repayment
             of principal is in arrears.

The ratings from AA to CC may be modified by the addition of a plus (+) or minus
(-) sign to show relative standing within the major rating categories.

                                       29
<PAGE>
 
Descriptions of the bond ratings of Moody's are as follows:

Aaa --       Bonds which are rated Aaa are judged to be of the best quality.
             They carry the smallest degree of investment risk and are generally
             referred to as "gilt edge." Interest payments are protected by a
             large or by an exceptionally stable margin, and principal is
             secure. While the various protective elements are likely to change,
             such changes as can be visualized are more unlikely to impair the
             fundamentally strong position of such issues.

Aa --        Bonds which are rated Aa are judged to be of high quality by all
             standards. Together with the Aaa group they comprise what are
             generally known as high grade bonds. They are rated lower than the
             best bonds because margins of protection may not be as large as in
             Aaa securities or fluctuation of protective elements may be of
             greater amplitude or there may be other elements present which make
             the long-term risks appear somewhat greater than the Aaa
             securities.

A --         Bonds which are rated A possess many favorable investment
             attributes and are to be considered as upper-medium-grade
             obligations. Factors giving security to principal and interest are
             considered adequate, but elements may be present which suggest a
             susceptibility to impairment some time in the future.

Baa --       Bonds which are rated Baa are considered as medium grade
             obligations, i.e., they are neither highly protected nor poorly
             secured. Interest payments and principal security appear adequate
             for the present, but certain protective elements may be lacking or
             may be characteristically unreliable over any great length of time.
             Such bonds lack outstanding investment characteristics and in fact
             have speculative characteristics as well.

Ba --        Bonds which are rated Ba are judged to have speculative elements;
             their future cannot be considered as well assured. Often the
             protection of interest and principal payments may be very moderate
             and thereby not well safeguarded during both good and bad times
             over the future. Uncertainty of position characterizes bonds in
             this class.

B --         Bonds which are rated B generally lack characteristics of the
             desirable investment. Assurance of interest and principal payments
             or of maintenance of other terms of the contract over any long
             period of time may be small.

Caa --       Bonds which are rated Caa are of poor standing. Such issues may be
             in default or there may be present elements of danger with respect
             to principal or interest.

Ca --        Bonds which are rated Ca represent obligations which are
             speculative to a high degree. Such issues are often in default or
             have other marked shortcomings.

                                       30
<PAGE>
 
C --         Bonds which are rated C are the lowest class of bonds and issues so
             rated can be regarded as having extremely poor prospects of ever
             attaining any real investment standing.

Moody's applies modifiers to each rating classification from Aa through B to
indicate relative ranking within its rating categories. The modifier "1"
indicates that a security ranks in the higher end of its rating category; the
modifier "2" indicates a mid-range ranking; and the modifier "3" indicates that
the issue ranks in the lower end of its rating category.

                                       31
<PAGE>
 
                                     PART B

Except as otherwise indicated herein, all capitalized terms shall have the
meaning assigned to them in Part A hereof.

Item 10. Cover Page.

Not applicable.

<TABLE>
<CAPTION>
Item 11. Table of Contents.                                        Page
                                                                   ----
   
<S>                                                                 <C>
General Information and History.....................................32
Investment Objectives and Policies..................................32
Management of the Registrant........................................34
Control Persons and Principal Holders of Securities.................36
Investment Advisory And Other Services .............................37
Brokerage Allocation and Other Practices............................38
Capital Stock and Other Securities..................................40
Purchase, Redemption and Pricing of Securities......................41
Tax Status..........................................................42
Underwriters........................................................44
Calculations of Performance Data....................................44
Financial Statements................................................44
</TABLE>
    

Item 12.          General Information and History

Not applicable

Item 13.          Investment Objectives and Policies.

The investment objectives and policies of the Series are described in Part A.
There can be no assurance that the Series will achieve their investment
objectives.

Except as described below under "Investment Restrictions" and except as
otherwise specifically stated in Part A or this Part B, the investment objective
and policies of each Series are not fundamental and may be changed without
shareholder approval.

The Trustees may also change the target index of any respective Series if they
consider that a different index would facilitate the management of the Series in
a manner which better enables the Series to seek to replicate the total return
of the market segment represented by the current index.


                                       32

<PAGE>
 
INVESTMENT RESTRICTIONS

The following investment restrictions have been adopted by each Series and may
be changed with respect to a particular Series only by the vote of the holders
of a majority of that Series' outstanding beneficial interests ("shares"), which
as used in this Part B means the lesser of (a) 67% of the shares of the Series
present at a meeting of shareholders if the holders of more than 50% of the
Series' shares are present or represented at that meeting, or (b) more than 50%
of the shares of the Series. Accordingly, no Series may:

         1.       Make any investment inconsistent with the Series'
classification as a non-diversified company under the Investment Company Act.

         2.       Invest more than 25% of its assets, taken at market value, in
the securities of issuers in any particular industry (excluding the U.S.
Government and its agencies and instrumentalities); provided, that in
replicating the weighting of a particular industry in its target index, a Series
may invest more that 25% of its total asssets in securities of issuers in that
industry.

         3.       Make investments for the purpose of exercising control or
management.

         4.       Purchase or sell real estate, except that, to the extent
permitted by applicable law, a Series may invest in securities directly or
indirectly secured by real estate or interests therein or issued by companies
which invest in real estate or interests therein.

         5.       Make loans to other persons, except that the acquisition of
bonds, debentures or other corporate debt securities and investment in
government obligations, commercial paper, pass-through instruments, certificates
of deposit, bankers' acceptances, repurchase agreements or any similar
instruments shall not be deemed to be the making of a loan, and except further
that a Series may lend its portfolio securities, provided that the lending of
portfolio securities may be made only in accordance with applicable law and the
guidelines set forth in the Trust's Registration Statement under the Investment
Company Act (the "Registration Statement"), as such Registration Statement may
be amended from time to time.

         6.       Issue senior securities to the extent such issuance would
violate applicable law.

         7.       Borrow money, except that (i) a Series may borrow from banks
(as defined in the Investment Company Act) in amounts up to 33 1/3% of its total
assets (including the amount borrowed), (ii) a Series may borrow up to an
additional 5% of its total assets for temporary purposes, (iii) a Series may
obtain such short-term credit as may be necessary for the clearance of purchases
and sales of portfolio securities and (iv) a Series may purchase securities on
margin to the extent permitted by applicable law.  A Series may not pledge its
assets other than to secure such borrowings or, to the extent permitted by the
Series' investment policies as set forth in its Registration Statement, as it
may be amended from time to time, in connection with hedging 

 
                                      33

<PAGE>
 
transactions, short sales, when-issued and forward commitment transactions and
similar investment strategies.

         8.       Underwrite securities of other issuers except insofar as a
Series technically may be deemed an underwriter under the Securities Act of
1933, as amended (the "Securities Act") in selling portfolio securities.

         9.       Purchase or sell commodities or contracts on commodities,
except to the extent that a Series may do so in accordance with applicable law
and the Trust's Registration Statement, as it may be amended from time to time,
and without registering as a commodity pool operator under the Commodity
Exchange Act.

In addition, the Trust has adopted as an operating policy, which may be changed
by the Trustees without shareholder approval, that no Series will make any
additional investments if the amount of its borrowings exceeds 5% of its total
assets. For purposes of this policy, borrowings will not include the use of
investment techniques that may be deemed to create leverage, including, but not
limited to, such techniques as dollar rolls, when-issued securities, options and
futures.

Portfolio securities of a Series generally may not be purchased from, sold or
loaned to the Manager or its affiliates or any of their directors, officers or
employees, acting as principal, unless pursuant to a rule or exemptive order
under the Investment Company Act.

Because of the affiliation of the Manager with the Trust, the Trust is
prohibited from engaging in certain transactions involving the Manager's
affiliate, Merrill Lynch, Pierce, Fenner & Smith Incorporated ("Merrill Lynch"),
or its affiliates except for brokerage transactions permitted under the
Investment Company Act involving only usual and customary commissions or
transactions pursuant to an exemptive order under the Investment Company Act.
See "Portfolio Transactions and Brokerage." Without such an exemptive order, the
Trust is prohibited from engaging in portfolio transactions with Merrill Lynch
or its affiliates acting as principal and from purchasing securities in public
offerings which are not registered under the Securities Act of 1933 in which
such firms or any of their affiliates participate as an underwriter or dealer.

Item 14. Management of the Registrant.

         The Trustees and executive officers of the Trust and their principal
occupations for at least the last five years are set forth below. Unless
otherwise noted, the address of each executive officer and Trustee is P.O. Box
9011, Princeton, New Jersey 08543-9011.
    
         TERRY K. GLENN (57) - President and Trustee(1)(2) - Executive Vice
President of MLAM and Fund Asset Management, L.P. ("FAM") since 1983; Executive
Vice President and Director of Princeton Services, Inc. since 1993; President of
Merrill Lynch Funds Distributor, Inc. (the "Distributor") since 1986 and
Director thereof since 1991; President
    

                                       34

<PAGE>
 
of Princeton Administrators, L.P. since 1988; and Director of Merrill Lynch
Financial Data Services, Inc. since 1985.
   
         JACK B. SUNDERLAND (69) - Trustee(2) - P.O. Box 7, West Cornwall,
Connecticut. 06796. President and Director of American Independent Oil Company,
Inc. (energy company) since 1987; Member of Council on Foreign Relations since
1971.
    
   
         STEPHEN B. SWENSRUD (64) - Trustee(2) - 24 Federal Street, Suite 400,
Boston, Massachusetts 02110. Chairman, Fernwood Advisers (investment adviser)
since 1996; Principal, Fernwood Associates (financial consultant) since 1975.
    
   
         J. THOMAS TOUCHTON (58) - Trustee(2) - Suite 3405, One Tampa City
Center, Tampa, Florida 33602. Managing Partner of The Witt-Touchton Company and
its predecessor The Witt Co. (private placement partnership) since 1972; Trustee
Emeritus of Washington and Lee University; Director of TECO Energy, Inc.
(electric utility holding company).     

   
         NORMAN R. HARVEY (64) - Senior Vice President(1)(2) - Senior Vice
President of MLAM and FAM since 1982.
    
   
         JOSEPH T. MONAGLE, JR. (49) - Senior Vice President(1)(2) - Senior Vice
President and Department Head of the Global Fixed Income Division of MLAM since
1990; Vice President of MLAM from 1978 to 1990.
    
   
         GREGORY MARK MAUNZ (44) - Senior Vice President (1)(2) - First Vice
President of MLAM since 1997; Vice President of MLAM from 1985 to 1997;
Portfolio Manager of MLAM since 1984.
    
   
         ERIC S. MITOFSKY (43) - Senior Vice President (1)(2) - First Vice
President of MLAM since 1997; Vice President of MLAM from 1992 to 1997; Senior
Desk Analyst with Merrill Lynch Program Trading Desk from 1987 to 1992.     
   
         JAY C. HARBECK (62) - Senior Vice President(1)(2) - First Vice
President of MLAM since 1997; Vice President of MLAM and FAM from 1986 to 1997.
    
   
         GERALD M. RICHARD (48) - Treasurer(1)(2) - Senior Vice President and
Treasurer of the Manager since 1984; Senior Vice President and Treasurer of FAM
since 1984; Treasurer of the Distributor since 1984 and Vice President since
1981.
    
   
         IRA SHAPIRO (34) - Secretary (1)(2) - Director (Legal-Advisory) of MLAM
since 1997; Attorney with MLAM and FAM from 1993 to 1997; Attorney in private
practice prior to 1993.
    
- ----------
(1)      Interested person, as defined in the Investment Company Act, of the
         Corporation.

(2)      Such Trustee or officer is a director, trustee or officer of other
         investment companies for which MLAM or FAM acts as investment adviser.


                                       35

<PAGE>
 
   
         As of the date of this Part B, the officers and Trustees of the Trust
as a group (eleven persons) owned an aggregate of less than 1/4 of 1% of the
outstanding shares of Common Stock of Merrill Lynch & Co., Inc. and owned an
aggregate of less than 1% of the outstanding shares of any of the Series.
    
   
         Pursuant to the terms of the Management Agreement with the Trust, the
Manager pays all compensation of officers of the Trust as well as the fees of
all Trustees who are affiliated persons of MLAM. The Trust and Merrill Lynch
Index Funds, Inc. (the "Corporation") pay each individual who serves as a
Director/Trustee not affiliated with the Manager (each a "non-affiliated
Director/Trustee") a fee of $2,500 per year plus $250 per Board meeting
attended, together with such individual's actual out-of-pocket expenses relating
to attendance at meetings. The Corporation and the Trust also compensate members
of the Audit and Nominating Committee (the "Committee"), which consists of all
of the Directors/Trustees who are not affiliated persons of the Funds of the
Corporation and the Series, with a fee of $1,000 per year. For the fiscal period
April 3, 1997 (commencement of operations) to December 31, 1997 for the S&P 500
Index Fund, the S&P 500 Index Series, the Aggregate Bond Index Fund and the
Aggregate Bond Index Series, fees and expenses paid to non-affiliated
Directors/Trustees aggregated $200, $5,797, $750 and $3,065, respectively. For
the fiscal period April 9, 1997 (commencement of operations) to December 31,
1997 for the Small Cap Index Fund,the Small Cap Index Series, the International
Index Fund and the International Index Series, fees and expenses paid to non-
affiliated Directors/Trustees aggregated $0, $2,203, $381 and $3,361,
respectively.     
   
COMPENSATION OF DIRECTORS/TRUSTEES
    
   
The following table sets forth the aggregate compensation the Corporation and
the Trust expect to pay to the non-affiliated Directors/Trustees for the current
fiscal year and the total compensation paid by all investment companies
advised by MLAM and its affiliate, FAM ("MLAM/FAM-Advised Funds") to the
non-affiliated Directors/Trustees for the calendar year ended December 31, 1997.
    
   
<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------------------------------
                                                                                                 TOTAL COMPENSATION
                                                                     PENSION OR RETIREMENT      FROM FUNDS/SERIES AND
                                                 AGGREGATE            BENEFITS ACCRUED AS         MLAM/FAM ADVISED
   NAME OF DIRECTOR/TRUSTEE                  COMPENSATION FROM        PART OF FUND/SERIES           FUNDS PAID TO
                                               FUNDS/SERIES                EXPENSES                 DIRECTORS/TRUSTEES(1)
- -----------------------------------------------------------------------------------------------------------------------
- -----------------------------------------------------------------------------------------------------------------------
<S>                                      <C>                                 <C>                       <C>      
Jack B. Sunderland                       $ 4,500                             None                      $ 132,600
- -----------------------------------------------------------------------------------------------------------------------
Stephen B. Swensrud                      $ 4,500                             None                      $ 175,500
- -----------------------------------------------------------------------------------------------------------------------
J. Thomas Touchton                       $ 4,500                             None                      $ 132,100
- -----------------------------------------------------------------------------------------------------------------------
</TABLE>
    
   
(1)      The Directors/Trustees serve on the boards of MLAM/FAM Advised Funds as
         follows: Mr. Sunderland (18 registered investment companies consisting
         of 30 portfolios); Mr. Swensrud (23 registered investment companies
         consisting of 54 portfolios); Mr. Touchton (18 registered investment
         companies consisting of 30 portfolios).
    
Item 15. Control Persons and Principal Holders of Securities.

   
    
    
The following chart sets forth the name and percentage of ownership of
each person who owns of record or is known by the Trust to own of record or
beneficially 5 percent or more of the Trust's outstanding interests, as of March
16, 1998. The address of each is P.O. Box 9011, Princeton, NJ 08543-9011:     
<TABLE>    
<CAPTION> 

Name                                                                   Percentage of ownership
- ----                                                                   -----------------------

<S>                                                                                      <C> 


Merrill Lynch Index Funds, Inc., - S&P 500 Index Fund                          51.39%
                                                                                    
Merrill Lynch Index Funds, Inc., - Small Cap Index Fund                         3.86%
                                                                                    
Merrill Lynch Small Cap Index Trust                                             2.59%
                                                                                    
Merrill Lynch Index Funds, Inc., - Aggregate Bond Index Fund                   32.84%
                                                                                    
Merrill Lynch Aggregate Bond Index Trust                                        0.03%
                                                                                    
Merrill Lynch Index Funds, Inc., - International Index Fund                     8.33%
                                                                                    
Merrill Lynch International Index Trust                                         0.96% 
</TABLE>     

                                       36
<PAGE>
 
All holders of interests ("Holders") are entitled to vote in proportion to the
amount of their interest in a Series or in the Trust, as the case may be. There
is no cumulative voting. Accordingly, the Holder or Holders of more than 50% of
the aggregate beneficial interests of the Trust would be able to elect all the
Trustees. With respect to the election of Trustees and ratification of
accountants the shareholders of separate Series vote together; they generally
vote separately by Series on other matters.

The Manager's address is 800 Scudders Mill Road, Plainsboro, New Jersey (mailing
address: Box 9011, Princeton, New Jersey 08543-9011).

Item 16.  Investment Advisory And Other Services.

INVESTMENT ADVISORY SERVICES

The Trust has engaged the Manager as investment manager to each of the Series.
The Manager is a limited partnership, the partners of which are ML & Co. and
Princeton Services. ML & Co. and Princeton Services are "controlling persons" of
the Manager as defined under the Investment Company Act because of their
ownership of its voting securities or their powers to exercise a controlling
influence over its management or policies. Similarly, the following entities may
be considered "controlling persons" of MLAM U.K.: Merrill Lynch Europe Limited
(MLAM U.K.'s parent), a subsidiary of Merrill Lynch International, Inc., a
subsidiary of ML & CO. Reference is made to Part A for certain information
concerning the management and advisory arrangements of the Trust.

Securities held by the Series may also be held by, or be appropriate investments
for, other funds or investment advisory clients for which the Manager or its
affiliates act as an adviser. Because of different objectives or other factors,
a particular security may be bought for one or more clients when one or more
clients are selling the same security. If purchases or sales of securities by
the Manager for the Series or other funds for which it acts as investment
adviser or for its advisory clients arise for consideration at or about the same
time, transactions in such securities will be made, insofar as feasible, for the
respective funds and clients in a manner deemed equitable to all. To the extent
that transactions on behalf of more than one client of the Manager or its
affiliates during the same period may increase the demand for securities being
purchased or the supply of securities being sold, there may be an adverse effect
on price.
   
The Trust has entered into a Management Agreement (the "Management Agreement")
with the Manager. As discussed in Part A, the Manager will receive for its
services to the Portfolios monthly compensation based upon a percentage of the
average daily net assets of the Series. For the fiscal period April 3, 1997
(commencement of operations) to December 31, 1997, the fee earned by the
Manager from the S&P 500 Index Series was $148,645, all of which was
voluntarily waived, and the fee earned by the Manager from the Aggregate Bond
Index Series was $88,609, of which $37,562 was voluntarily waived. For the
fiscal period April 9, 1997 (commencement of operations) to December 31, 1997,
the fee earned by the Manager from the Small Cap Index Series was $36,425, all
of which was voluntarily waived, and the fee earned by the Manager from the
International Index Series was $100,102, of which $35,546 was voluntarily
waived.

    
The Management Agreement obligates the Manager to provide investment advisory
services and to pay all compensation of and furnish office space for officers
and employees of the Trust connected with investment and economic research,
trading and investment management of the Trust, as well as the fees of all
Trustees who are affiliated persons of the Manager or any of their affiliates.
The Trust pays all other expenses incurred in the operation of the Trust,
including, among other things, taxes, expenses for legal and auditing services,
costs of printing proxies, stock certificates, shareholder reports and its
registration statement (except to the extent paid by Merrill Lynch Funds
Distributor, Inc. as Placement Agent), charges of the Custodian, any Sub-
custodian and Transfer Agent, expenses of redemption of shares, registration and
other regulatory fees, expenses of registering the shares under federal, state
or foreign laws, fees and expenses of 


                                       37

<PAGE>
 
unaffiliated Trustees, accounting and pricing costs (including the daily
calculation of net asset value), insurance, interest, brokerage costs,
litigation and other extraordinary or non-recurring expenses, and other
expenses properly payable by the Trust. The Placement Agent will pay the
expenses of the Trust incurred in connection with the placement of its shares.

Unless earlier terminated as described below, the Management Agreement will
remain in effect for two years from the date of its adoption. Thereafter, it
will remain in effect from year to year if approved annually (a) by the Trustees
or, with respect to any Series, by a majority of the outstanding shares of the
Series and (b) by a majority of the Trustees who are not parties to such
contract or interested persons (as defined in the Investment Company Act) of any
such party. Such contracts are not assignable and may be terminated without
penalty on 60 days' written notice at the option of either party thereto or,
with respect to any Series, by the vote of the shareholders of the Series.


INDEPENDENT ACCOUNTANTS

Deloitte & Touche LLP, has been selected as the independent auditors of the
Trust. The selection of independent auditors is subject to ratification by the
Trust's shareholders in years when an annual meeting of shareholders is held. In
addition, employment of such auditors may be terminated without any penalty by
vote of a majority of the outstanding shares of the Trust at a meeting called
for the purpose of terminating such employment. The independent auditors are
responsible for auditing the annual financial statements of the Trust.

LEGAL COUNSEL

Shereff, Friedman, Hoffman & Goodman, LLP, 919 Third Avenue, New York 10022, is
counsel for the Trust.

CUSTODIAN

Merrill Lynch Trust Company, 800 Scudders Mill Road, Plainsboro, New Jersey
08536, acts as the custodian of the assets of S&P 500 Index Series, Small Cap
Index Series and Aggregate Bond Index Series. State Street Bank and Trust
Comnpany ("State Street"), P.O. Box 351, Boston Massachusetts 02101, acts as the
custodian of the assets of International Index Series. Under its contract with
the Trust, State Street is authorized to establish separate accounts in foreign
currencies and to cause foreign securities owned by International Index Series
to be held in its offices outside the United States and with certain foreign
banks and securities depositories. Each custodian is responsible for
safeguarding and controlling cash and securities, handling the receipt and
dilivery of securities and collecting interest and dividends on investments.

Item 17. Brokerage Allocation and Other Practices.

The Manager is responsible for making portfolio decisions for each Series,
placing the Series' brokerage business, evaluating the reasonableness of
brokerage commissions and negotiating the amount of any commissions paid subject
to a policy established by the Trust's Trustees and officers. The Trust has no
obligation to deal with any broker or group of brokers in the execution of
transactions in portfolio securities. Orders for transactions in portfolio
securities are placed for the Trust with a number of brokers and dealers,
including Merrill Lynch. In placing orders, it is the policy of the Trust to
obtain the most favorable net results, taking into account various factors,
including price, commissions, if any, size of the transaction and difficulty of
execution. Where practicable, the Manager surveys a number of brokers and
dealers in connection with proposed portfolio transactions and selects the
broker or dealer which offers the Trust the best 

                                       38

<PAGE>
 
price and execution or other services which are of benefit to the Trust.
Securities firms also may receive brokerage commissions on transactions
including covered call options written by the Trust and the sale of underlying
securities upon the exercise of such options.

    
The Trust does not use any particular broker or dealer, and brokers who provide
supplemental investment research to the Manager may receive orders for
transactions by the Trust. Such supplemental research services ordinarily
consist of: quantitative and modeling information assessments and analyses of
the business or prospects of a company, industry or economic sector. Information
so received will be in addition to and not in lieu of the services required to
be performed by the Manager under the Management Agreement. If in the judgment
of the Manager the Trust will be benefited by supplemental research services,
the Manager is authorized to pay brokerage commissions to a broker furnishing
such services which are in excess of commissions which another broker may have
charged for effecting the same transaction. The expenses of the Manager will not
necessarily be reduced as a result of the receipt of such supplemental
information, and the Manager may use such information in servicing its other
accounts. For the fiscal period April 3, 1997 to December 31, 1997, the Series
did not acquire any Securities of brokers or dealers which executed its
portfolio transactions during that period.     

The Trust anticipates that brokerage transactions involving securities of 
companies domiciled in countries other than the United States will be conducted 
primarily on the principal stock exchanges of such countries. Brokerage 
Commissions and other transaction costs on foreign stock exchange transactions 
are higher than in the United States, although the Trust will endeavor to 
achieve the best net results in effecting its portfolio transactions. There is 
generally less government supervision and regulation of foreign stock exchanges 
and brokers than in the United States.

A Series may invest in certain securities traded in the over-the-counter market
and, where possible, deal directly with the dealers who make a market in the
securities involved, except in those circumstances in which better prices and
execution are available elsewhere. Under the Investment Company Act, persons
affiliated with the Trust generally are prohibited from dealing with the Trust
as principal in purchase and sale of securities. Since transactions in the
over-the-counter market usually involve transactions with dealers acting as
principal for their own accounts, affiliated persons of the Trust, including
Merrill Lynch, will not serve as the Trust's dealer in such transactions.
However, affiliated persons of the Trust may serve as its broker in the
over-the-counter transactions conducted on an agency basis.

Pursuant to Section 11(a) of the Securities Exchange Act of 1934, as amended,
Merrill Lynch may execute transactions for the Trust on the floor of any
national securities exchange provided that prior authorization of such
transactions is obtained and Merrill Lynch furnishes a statement to the Trust at
least annually setting forth the compensation it has received in connection with
such transactions.

    
For the fiscal period April 3, 1997 (commencement of operations) to December 31,
1997, the Series paid brokerage commissions of $118,903 and $0 for the S&P 500
Index Series and the Aggregate Bond Index Series, respectively. For the fiscal
period April 9, 1997 (commencement of operations) to December 31, 1997, the
Trust paid brokerage commissions of $60,361 and $146,336 for the Small Cap Index
Series and the International Index Series, respectively. The Series paid no
commissions to Merrill Lynch.    

The Trustees have considered the possibility of seeking to recapture for the
benefit of the Trust brokerage commissions, dealer spreads and other expenses of
possible portfolio transactions, such as underwriting commissions, by conducting
such portfolio transactions through affiliated entities, including Merrill
Lynch. For example, brokerage commissions received by Merrill Lynch could be
offset against the management fee paid by the Trust to the Manager. After
considering all factors deemed relevant, the Trustees made a determination not
to seek such recapture. The Trustees will reconsider this matter from time to
time.

Portfolio Turnover. Although the Series will use a passive, indexing approach to
investing, each Series may engage in a substantial number of portfolio
transactions. The rate of portfolio turnover will be a limiting factor when the
Manager considers whether to purchase or sell securities for a 



                                       39

<PAGE>
 
    
Series only to the extent that the Manager will consider the impact of
transaction costs on a Series' tracking error. Changes in the securities
comprising a Series' index will tend to increase that Series' portfolio turnover
rate, as the Manager restructures the Series' holdings to reflect the changes in
the index. A high rate of turnover would result in correspondingly greater
brokerage commission expenses. Portfolio turnover rate is calculated by dividing
the lesser of the Series' annual sales or purchases of portfolio Securities
(exclusive of purchases and sales of Government securities and of all other
securities, including options, whose maturity or expiration dates at the time of
acquisition were one year or less) by the monthly average value of the
securities in the Series during the fiscal year. For the fiscal period April 3,
1997 (commencement of operations) to December 31, 1997, the portfolio turnover
of the S&P 500 Index Series and the Aggregate Bond Index Series was 24.31% and
86.58%, respectively. For the fiscal period April 9, 1997, (commencement of
operations) to December 31, 1997, the portfolio turnover of the Small Cap Index
Series and the International Index Series was 16.45% and 14.79%,
respectively.    

Item 18. Capital Stock and Other Securities.

Under the Declaration of Trust that establishes the Trust, a Delaware business
trust, the Trustees are authorized to issue beneficial interests in each Series
of the Trust. Investors are entitled to participate, in proportion to their
investment, in distributions of taxable income, loss, gain and deduction with
respect to the Series in which they have invested. Upon liquidation or
dissolution of a Series, investors are entitled to share in proportion to their
investment in such Series' net assets available for distribution to its
investors. Interests in a Series have no preference, preemptive, conversion or
similar rights and are fully paid and nonassessable, except as set forth below.
Investments in a Series generally may not be transferred.

Each investor is entitled to a vote in proportion to the amount of its interest
in a Series or in the Trust, as the case may be. Investors in the Trust, or in
any Series, do not have cumulative voting rights, and investors holding more
than 50% of the aggregate beneficial interests in the Trust may elect all of the
Trustees of the Trust if they choose to do so and in such event the other
investors in the Trust would not be able to elect any Trustee. The Trust is not
required and has no current intention to hold annual meetings of investors but
the Trust will hold special meetings of investors when in the judgment of the
Trustees it is necessary or desirable to submit matters for an investor vote.

A Series shall be dissolved (i) by the affirmative vote of the Holders holding
not less than two-thirds of the beneficial interests in the Series, at any
meeting of such Holders or by an instrument in writing, without a meeting signed
by the Trustees and consented to by the Holders holding not less than two-thirds
of the beneficial interests in such Series, (ii) by the Trustees by written
notice of such dissolution to the Holders in such Series, (iii) upon the
complete withdrawal of a Holder from the Series, or (iv) upon the bankruptcy or
dissolution of a Holder in the Series; provided that in the case of (iii) or
(iv) the Holders in such Series may unanimously vote to continue the Series. The
Trust shall be dissolved upon the dissolution of the last remaining Series.

The Declaration of Trust provides that obligations of the Trust and the Series
are not binding upon the Trustees individually but only upon the property of the
Series and that the Trustees will not be liable for any action or failure to
act, but nothing in the Declaration of Trust protects a Trustee against any
liability to which he would otherwise be subject by reason of willful


                                       40

<PAGE>
 
misfeasance, bad faith, gross negligence, or reckless disregard of the duties
involved in the conduct of his office. The Declaration of Trust provides that
the Trust may maintain appropriate insurance (for example, fidelity bonding and
errors and omissions insurance) for the protection of the Series, their Holders,
Trustees, officers, employees and agents covering possible tort and other
liabilities.

The Trust currently consists of four Series. The Trust reserves the right to
create and issue interests in a number of additional Series. As indicated above,
Holders of each Series participate equally in the earnings and assets of the
particular Series. Holders of each Series are entitled to vote separately to
approve advisory agreements or changes in investment policy, but Holders of all
Series vote together in the election or selection of Trustees and accountants
for the Trust. Upon liquidation or dissolution of a Series, the Holders of such
Series are entitled to share in proportion to their investment in the net assets
of such Series available for distribution to Holders.

DIVIDENDS AND DISTRIBUTIONS.

   
It is the Trust's intention to distribute all of its net investment income, if
any. Dividends from such net investment income will be paid at least annually
with respect to each of the S&P 500 Index Series, Small Cap Index Series and
International Index Series. Dividends with respect to the Aggregate Bond Series
will be declared daily and paid monthly. All net realized long- or short-term
capital gains, if any, are distributed to Series interestholders at least
annually. From time to time, a Series may declare a special distribution at or
about the end of the calendar year in order to comply with certain Federal
income tax requirements. All Dividends and Distributions will be credited to the
accounts of interestholders or paid to interestholders, in each case as the
interestholder directs.
    
Item 19. Purchase, Redemption and Pricing of Securities.

Beneficial interests in the Trust are not offered to the public and are issued
solely in private placement transactions that do not involve any "public
offering" within the meaning of Section 4(2) of the 1933 Act. Investments in the
Trust may be made only by a limited number of institutional investors, including
investment companies, common or commingled trust funds, group trusts and certain
other entities that are "accredited investors" within the meaning of Regulation
D under the 1933 Act. The number of Holders of any Series shall be limited to
fewer than 100. This Registration Statement does not constitute an offer to
sell, or the solicitation of an offer to buy, any "security" within the meaning
of the 1933 Act.

    
The net asset value of each Series is determined on each Pricing Day. During the
12 months following the date of this Registration Statement, the weekdays that
the New York Stock Exchange is expected to be closed are New Year's Day,
Presidents' Day, Martin Luther King, Jr. Day, Good Friday, Memorial Day,
Independence Day, Labor Day, Thanksgiving Day and Christmas Day.     



                                       41

<PAGE>
 
The net asset value of each Series is determined once each day as of 15 minutes
after the close of regular trading on the New York Stock Exchange (normally,
4:00 p.m. New York time). For further information concerning the Series' net
asset value, and the valuation of the Series' assets, see Part A.

WITHDRAWALS

An investor in the Trust may withdraw all or a portion of its investment in any
Series on any Pricing Day at the net asset value next determined after a
withdrawal request in proper form is furnished by the investor to the Series.
The proceeds of the withdrawal will be paid by the Series normally on the
business day on which the withdrawal is effected, but in any event within seven
days. Investments in any Series of the Trust may not be transferred.

Item 20. Tax Status.
    
The Trust is organized as a Delaware business trust. Each Series is treated as a
separate partnership under the Internal Revenue Code of 1986 (the "Code") and,
thus, is not subject to income tax. The Series have received rulings from the
Internal Revenue Service establishing their status as partnerships. Based upon
the status of each Series as a partnership, each investor in a Series will be
taxable on its share (as determined in accordance with the governing instruments
of such Series) of such Series's ordinary income and capital gain in determining
its income tax liability. The determination of such share will be made in
accordance with the Code and regulations promulgated thereunder.    

Although, as described above, the Series will not be subject to federal income
tax, they will file appropriate income tax returns. Each prospective Investor
Fund which is a regulated investment company ("RIC") will be required to agree,
in its subscription agreement, that, for purposes of determining its required
distribution under Code Section 4982(a), it will account for its share of items
of income, gain, loss and deduction of a Series as they are taken into account
by the Series.

All of the Series may invest in futures contracts or options. Certain options,
futures contracts and options on futures contracts are "section 1256 contracts."
Any gains or losses on section 1256 contracts are generally considered 60%
long-term and 40% short-term capital gains or losses ("60/40"). Also, section
1256 contracts held by a Series at the end of each taxable year are treated for
federal income tax purposes as being sold on such date for their fair market
value. The resultant paper gains or losses are also treated as 60/40 gains or
losses. When the section 1256 contract is subsequently disposed of, the actual
gain or loss will be adjusted by the amount of any preceding year-end gain or
loss.



                                       42

<PAGE>
 
Foreign currency gains or losses on non-U.S. dollar denominated bonds and other
similar debt instruments and on any non-U.S. dollar denominated futures
contracts, options and forward contracts that are not section 1256 contracts
generally will be treated as ordinary income or loss.

    
Certain hedging transactions undertaken by a Series may result in "straddles"
for federal income tax purposes. The straddle rules may affect the character of
gains (or losses) realized by the Series. In addition, losses realized by the
Series on positions that are part of a straddle may be deferred, rather than
being taken into account in calculating taxable income for the taxable year in
which such losses are realized. Because only a few regulations implementing the
straddle rules have been promulgated, the tax consequences of hedging
transactions to the Series are not entirely clear. The Series may make one or
more of the elections available under the Code which are applicable to
straddles. If the Series makes any of the elections, the amount, character and
timing of the recognition of gains or losses from the affected straddle
positions will be determined under rules that vary according to the elections
made. The rules applicable under certain of the elections operate to accelerate
the recognition of gains or losses from the affected straddle positions.
Additionally, the conversion transaction or constructive sale rules may apply
to certain transactions (including straddles) to change the character of capital
gains to ordinary income or require the recognition of income prior to the
economic recognition of such income.     


The Series may be subject to a tax on dividend or interest income received from
securities of a non-U.S. issuer withheld by a foreign country at the source. The
United States has entered into tax treaties with many foreign countries which
entitle the Series to a reduced rate of tax or exemption from tax on such
income. It is impossible to determine the effective rate of foreign tax in
advance since the amount of each Series' assets to be invested within various
countries is not known.

The Series may make investments that produce income that is not matched by a
corresponding cash receipt by the Series, such as investments in obligations
having original issue discount or market discount (if a Series elects to accrue
the market discount on a current basis with respect to such instruments).
Because such income may not be matched by a corresponding cash receipt, the
Series may be required to borrow money or dispose of other securities to be able
to make distributions to investors.

Each Series' taxable income will in most cases be determined on the basis of
reports made to such Series by the issuers of the securities in which such
Series invests. The tax treatment of certain securities in which a Series may
invest is not free from doubt, and it is possible that an Internal Revenue
Service examination of the issuers of such securities or of such Series could
result in adjustments to the income of the Series.

    
Under the Trust, each Series is to be managed in compliance with the provisions
of the Code applicable to RICs as though such requirements were applied at the
Series level. Thus, consistent with its investment objectives, each Series will
meet the income and diversification of assets tests of the Code applicable to
RICs. The Series have received rulings from the Internal
Revenue Service that Holders of interests in the Series     

                                       43

<PAGE>
 
that are RICs will be treated as owners of their proportionate shares of the
Series' assets and income for purposes of the Code's requirements applicable
thereto.

Item 21. Underwriters.

The exclusive placement agent for each Series of the Trust is Merrill Lynch
Funds Distributor, Inc., which receives no compensation for serving in this
capacity. Investment companies, common and commingled trust funds and similar
organizations and entities may continuously invest in the Series.

Item 22. Calculations of Performance Data.

Beneficial interests in the Trust are not offered to the public and are issued
solely in private placement transactions that do not involve any "public
offering" within the meaning of Section 4(2) of the 1933 Act. Accordingly, the
Trust will not advertise the Series' performance. However, certain of the
Trust's Holders may from time to time advertise their performance, which will be
based upon the Trust's performance.

Total return figures are based on historical performance and are not intended to
indicate future performance. Average annual total return is determined in
accordance with a formula specified by the Securities and Exchange Commission.

Average annual total return quotations for the specified periods are computed by
finding the average annual compounded rates of return (based on net investment
income and any realized and unrealized capital gains or losses on portfolio
investments over such periods) that would equate the initial amount invested to
the redeemable value of such investment at the end of each period. Average
annual total return is computed assuming all dividends and distributions are
reinvested and taking into account all applicable recurring and nonrecurring
expenses.

Annual, average annual and annualized total return and aggregate total return
performance data, both as a percentage and as a dollar amount, are based on a
hypothetical $1,000 investment and computed as described above, except that as
required by the periods of the quotations, actual annual, annualized or
aggregate data, rather than average annual data, may be quoted. Actual annual or
annualized total return data generally will be lower than average annual total
return data since the average rates of return reflect compounding of return;
aggregate total return data generally will be higher than average annual total
return data since the aggregate rates of return reflect compounding over a
longer period of time.

Yield quotations will be computed based on a 30-day period by dividing (a) the
net income based on the yield of each security earned during the period by (b)
the average number of shares outstanding during the period that were entitled to
receive dividends multiplied by the maximum offering price per share on the last
day of the period.

Item 23. Financial Statements


         Independent Auditors' Report and Financial Statements of S&P 500
         Index Series 

         Independent Auditors' Report and Financial Statements of Small Cap 
         Index Series 

         Independent Auditors' Report and Financial Statements of Aggregate Bond
         Index Series

         Independent Auditors' Report and Financial Statements of International
         Index Series 



                                       44

<PAGE>
     
INDEPENDENT AUDITORS' REPORT
 
The Board of Trustees and Investors of 
Merrill Lynch Index Trust:

We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Merrill Lynch S&P 500 Index Series (one of the
series constituting Merrill Lynch Index Trust) as of December 31, 1997, the
related statements of operations and changes in net assets, and the financial
highlights for the period April 3, 1997 (commencement of operations) to December
31, 1997. These financial statements and the financial highlights are the
responsibility of the Trust's management. Our responsibility is to express an
opinion on these financial statements and the financial highlights based on our
audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements and the financial highlights
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. Our
procedures included confirmation of securities owned at December 31, 1997 by
correspondence with the custodian and brokers. An audit also includes assessing
accounting principles used and significant estimates made by management, as well
as evaluating the overall financial statement presentation. We believe that our
audit provides a reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of Merrill Lynch S&P
500 Index Series of the Merrill Lynch Index Trust as of December 31, 1997, the
results of its operations, the changes in its net assets, and the financial
highlights for the period April 3, 1997 to December 31, 1997 in conformity with
generally accepted accounting principles.

/s/ Deloitte & Touche LLP

Deloitte & Touche LLP
Princeton, New Jersey
February 18, 1998
     

                                      45
<PAGE>
 
SCHEDULE OF INVESTMENTS

Common
Stocks

  Merrill Lynch S&P 500 Index Series
  ------------------------------------------------------------------------------
                                                     Shares              Value
  Issue                                               Held             (Note 1a)
================================================================================
+ 3Com Corporation..............................     26,738            $ 934,159
  ALLTEL Corporation............................     14,325              588,220
+ ALZA Corporation..............................      6,600              209,963
  AMP Inc.......................................     17,005              714,210
+ AMR Corporation...............................      7,046              905,411
  ASARCO Inc....................................      3,119               69,983
  AT&T Corp.....................................    125,542            7,689,448
  Abbott Laboratories...........................     59,119            3,875,989
  Adobe Systems Inc.............................      5,629              231,493
+ Advanced Micro Devices, Inc...................     10,958              196,559
  Aeroquip-Vickers Inc..........................      2,161              106,024
  Aetna, Inc....................................     11,485              810,410
  Ahmanson (H.F.) & Company.....................      7,297              488,443
  Air Products and Chemicals, Inc...............      8,475              697,069
+ AirTouch Communications, Inc..................     39,014            1,621,519
  Alberto-Culver Company (Class B)..............      4,321              138,542
  Albertson's, Inc..............................     18,979              899,130
  Alcan Aluminium Ltd...........................     17,539              484,515
  Allegheny Teledyne, Inc.......................     13,469              348,510
  Allergan, Inc.................................      5,044              169,289
  AlliedSignal, Inc.............................     43,601            1,697,714
  Allstate Corporation..........................     33,143            3,011,870
  Aluminum Company of America...................     13,330              938,099
  Amerada Hess Corporation......................      7,085              388,789
  American Electric Power Company, Inc..........     14,655              756,564
  American Express Company......................     35,923            3,206,128
  American General Corporation..................     18,826            1,017,781
  American Greetings Corporation                                  
    (Class A)...................................      5,691              222,660
  American Home Products Corp...................     50,213            3,841,295
  American International Group, Inc.............     54,220            5,896,425
  American Stores Company.......................     21,102              433,910
  Ameritech Corporation.........................     42,298            3,404,989
  Amgen Inc.....................................     20,343            1,101,065
  Amoco Corporation.............................     37,636            3,203,765
  Anadarko Petroleum Corporation................      4,604              279,405
+ Andrew Corporation............................      7,008              168,192
  Anheuser-Busch Companies, Inc.................     37,869            1,666,236
  Aon Corporation...............................     12,962              759,897
  Apache Corporation............................      6,969              244,351
+ Apple Computer, Inc...........................      9,834              129,071
+ Applied Materials, Inc........................     28,158              848,260
  Archer-Daniels-Midland Company................     43,093              934,579
+ Armco Inc.....................................      8,345             $ 41,203
  Armstrong World Industries, Inc...............      3,162              236,360
  Ashland Inc...................................      5,798              311,280
  Atlantic Richfield Company....................     24,776            1,985,177
  Autodesk, Inc.................................      3,736              138,232
  Automatic Data Processing, Inc................     22,628            1,388,794
+ AutoZone, Inc.................................     11,663              338,227
  Avery Dennison Corporation....................      7,932              354,957
  Avon Products, Inc............................     10,222              627,375
  BB&T Corporation..............................     10,590              678,422
  Baker Hughes, Inc.............................     13,032              568,521
  Ball Corporation..............................      2,344               82,773
  Baltimore Gas and Electric Company............     11,388              387,904
  Banc One Corporation..........................     45,367            2,463,995
  Bank of New York Co., Inc. (The)..............     29,113            1,683,095
  BankAmerica Corporation.......................     53,599            3,912,727
  BankBoston Corporation........................     11,251            1,056,891
  Bankers Trust NY Corporation..................      7,571              851,264
  Bard (C.R.), Inc..............................      4,405              137,932
  Barnett Banks, Inc............................     14,907            1,071,441
  Barrick Gold Corporation......................     28,803              536,456
  Battle Mountain Gold Company..................     17,749              104,275
  Bausch & Lomb Inc.............................      4,279              169,555
  Baxter International, Inc.....................     21,645            1,091,720
+ Bay Networks, Inc.............................     16,354              418,049
  Becton, Dickinson & Company...................      9,453              472,650
  Bell Atlantic Corporation.....................     60,028            5,462,548
  BellSouth Corporation.........................     76,643            4,315,959
  Bemis Company, Inc............................      4,066              179,158
  Beneficial Corporation........................      4,101              340,896
+ Bethlehem Steel Corporation...................      8,696               75,003
  Biomet, Inc...................................      8,598              220,324
  Black & Decker Corporation (The)..............      7,328              286,250
  Block (H & R), Inc............................      8,023              359,531
  Boeing Company (The)..........................     77,261            3,780,960
  Boise Cascade Corporation.....................      4,345              131,436
+ Boston Scientific Corporation.................     15,042              690,052
  Briggs & Stratton Corporation.................      1,953               94,843
  Bristol-Myers Squibb Co.......................     76,850            7,271,931
  Brown-Forman Corporation (Class B)............      5,321              293,985
  Browning-Ferris Industries, Inc...............     15,263              564,731
  Brunswick Corporation.........................      7,670              232,497
  Burlington Northern Santa Fe Corp.............     12,072            1,121,942
                                                                

                                      46
<PAGE>
 
              Merrill Lynch S&P 500 Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

Common
Stocks
(continued)

  Merrill Lynch S&P 500 Index Series (continued)
  ------------------------------------------------------------------------------
                                                     Shares              Value
  Issue                                               Held             (Note 1a)
================================================================================
  Burlington Resources Inc......................     13,645            $ 611,467
  CBS Corporation...............................     54,414            1,601,812
  CIGNA Corporation.............................      5,752              995,456
  CINergy Corporation...........................     12,165              466,072
  CPC International Inc.........................     11,080            1,193,870
  CSX Corporation...............................     16,864              910,656
  CVS Corporation...............................     13,283              850,942
+ Cabletron Systems, Inc........................     12,177              182,655
  Caliber System, Inc...........................      3,013              146,695
  Campbell Soup Company.........................     35,363            2,055,474
  Cardinal Health, Inc..........................      8,451              634,881
  Carolina Power & Light Company................     11,620              493,124
  Case Corporation..............................      5,804              350,779
  Caterpillar, Inc..............................     28,774            1,397,337
+ Cendant Corporation...........................     61,144            2,101,825
  Centex Corporation............................      2,291              144,190
  Central and South West Corporation............     16,403              443,906
+ Ceridian Corporation..........................      5,867              268,782
  Champion International Corp...................      7,430              336,672
+ Charming Shoppes, Inc.........................      8,190               38,391
  Chase Manhattan Corp. (The)...................     32,575            3,566,963
  Chevron Corporation...........................     50,761            3,908,597
  Chrysler Corporation..........................     51,205            1,801,776
  Chubb Corporation.............................     13,152              994,620
  Cincinnati Financial Corporation..............      4,213              592,980
  Cincinnati Milacron Inc.......................      3,072               79,680
  Circuit City Stores--Circuit City Group.......      7,629              271,306
+ Cisco Systems, Inc............................     77,770            4,335,650
  Citicorp......................................     35,310            4,464,508
+ Clear Channel Communications, Inc.............      7,573              601,580
  Clorox Company................................      7,981              630,998
  Coastal Corporation (The).....................      8,186              507,020
  Coca-Cola Company.............................    191,161           12,736,102
  Cognizant Corporation.........................     12,533              558,502
  Colgate-Palmolive Company.....................     22,863            1,680,431
  Columbia Gas System, Inc. (The)...............      4,266              335,148
  Columbia/HCA Healthcare Corp..................     50,051            1,482,761
  Comcast Corporation (Class A).................     26,942              850,357
  Comerica, Inc.................................      8,120              732,830
  Compaq Computer Corporation...................     58,510            3,302,158
  Computer Associates International, Inc........     42,254            2,234,180
+ Computer Sciences Corporation.................      6,001              501,084
  ConAgra, Inc..................................     36,480            1,197,000
  Conseco, Inc..................................     14,562              661,661
  Consolidated Edison Company of                                 
   New York, Inc................................     18,130              743,330
  Consolidated Natural Gas Company..............      7,379              446,430
  Cooper Industries, Inc........................      9,353              458,297
  Cooper Tire & Rubber Company..................      6,092              148,493
  Coors (Adolph) Company (Class B)..............      2,898               96,359
  CoreStates Financial Corp.....................     15,289            1,224,076
  Corning, Inc..................................     17,867              663,312
+ Costco Companies, Inc.........................     16,413              732,430
  Countrywide Credit Industries, Inc............      8,342              357,663
  Crane Co......................................      3,538              153,461
  Crown Cork & Seal Company, Inc................      9,906              496,538
  Cummins Engine Co., Inc.......................      2,952              174,353
  Cyprus Amax Minerals Co.......................      7,203              110,746
+ DSC Communications Corporation................      9,116              218,784
  DTE Energy Company............................     11,195              388,327
  Dana Corporation..............................      8,117              385,558
  Darden Restaurants, Inc.......................     11,820              147,750
+ Data General Corporation......................      3,695               64,432
  Dayton Hudson Corp............................     16,854            1,137,645
  Deere & Company...............................     19,470            1,135,344
+ Dell Computer Corporation.....................     25,230            2,119,320
  Delta Air Lines, Inc..........................      5,720              680,680
  Deluxe Corporation............................      6,287              216,902
+ Digital Equipment Corporation.................     11,423              422,651
  Dillard's Inc. (Class A)......................      8,549              301,352
  Disney (Walt) Company (The)...................     52,169            5,167,992
  Dominion Resources, Inc.......................     14,448              614,943
  Donnelley (R.R.) & Sons Co....................     11,308              421,223
  Dover Corporation.............................     17,175              620,447
  Dow Chemical Company (The)....................     17,526            1,778,889
  Dow Jones & Company, Inc......................      7,419              398,308
  Dresser Industries, Inc.......................     13,565              568,882
  Duke Energy Corporation.......................     27,776            1,538,096
  Dun & Bradstreet Corp. (The)..................     13,159              407,107
  duPont (E.I.) de Nemours & Company............     87,462            5,253,186
  EG & G, Inc...................................      3,532               73,510
+ EMC Corporation...............................     38,332            1,051,734
  Eastern Enterprises...........................      1,567               70,515
  Eastman Chemical Company......................      6,060              360,949
  Eastman Kodak Company.........................     25,112            1,527,124
  Eaton Corporation.............................      5,954              531,395
  Echlin Inc....................................      4,868              176,161
+ Echo Bay Mines Ltd............................     10,750               26,203
  Ecolab Inc....................................      4,991              276,689
  Edison International..........................     29,483              801,569
  Emerson Electric Co...........................     34,248            1,932,872

                                      47
<PAGE>
 
  Engelhard Corporation.........................     11,166            $ 194,009
  Enron Corp....................................     24,579            1,021,565
  Entergy Corporation...........................     18,853              564,412
  Equifax Inc...................................     11,607              411,323
  Exxon Corporation++...........................    190,596           11,662,093
+ FMC Corporation...............................      2,870              193,187
  FPL Group, Inc................................     14,090              833,952
+ Federal Express Corporation...................      8,881              542,296
  Federal Home Loan Mortgage                                     
   Corporation..................................     53,708            2,252,379
  Federal National Mortgage Association.........     81,986            4,678,326
+ Federated Department Stores, Inc..............     16,196              697,440
  Fifth Third BanCorp...........................     11,901              972,907
  First Chicago NBD Corporation.................     22,486            1,877,581
  First Data Corporation........................     33,084              967,707
  First Union Corporation.......................     48,495            2,485,369
+ FirstEnergy Corp..............................     17,762              515,098
  Fleet Financial Group, Inc....................     19,308            1,446,893
  Fleetwood Enterprises, Inc....................      2,748              116,618
  Fluor Corporation.............................      6,479              242,153
  Ford Motor Company............................     92,750            4,515,766
  Fort James Corporation........................     16,139              617,317
  Fortune Brands Inc............................     13,277              492,079
  Foster Wheeler Corporation....................      3,134               84,814
  Freeport-McMoRan Copper &                                      
   Gold Co., Inc. (Class B).....................     14,948              235,431
  Frontier Corporation..........................     12,688              305,305
+ Fruit of the Loom, Inc. (Class A).............      5,658              144,986
  GPU, Inc......................................      9,299              391,720
  GTE Corporation...............................     74,011            3,867,075
  Gannett Co., Inc..............................     21,891            1,353,137
  Gap, Inc. (The)...............................     31,060            1,100,706
  General Dynamics Corporation..................      4,840              418,358
  General Electric Company......................    252,957           18,560,720
  General Mills, Inc............................     12,230              875,974
  General Motors Corporation....................     54,666            3,314,126
  General Re Corporation........................      6,062            1,285,144
  General Signal Corporation....................      3,861              162,886
  Genuine Parts Company.........................     13,811              468,711
  Georgia-Pacific Corporation...................      7,158              434,849
  Giant Food Inc. (Class A).....................      4,647              156,546
  Gillette Company (The)........................     43,289            4,347,839
  Golden West Financial Corporation.............      4,415              431,842
  Goodrich (B.F.) Company (The).................      5,551              230,020
  Goodyear Tire & Rubber Co. (The)..............     12,087              769,035
  Grace (W.R.) & Co.............................      5,738              461,550
  Grainger (W.W.), Inc..........................      3,840              373,200
  Great Atlantic & Pacific Tea Co., Inc.........      2,949               87,548
  Great Lakes Chemical Corporation..............      4,625              207,547
  Green Tree Financial Corporation..............     10,539              275,990
  Guidant Corporation...........................     11,437              711,953
  HBO & Company.................................     15,445              741,360
+ HEALTHSOUTH Corporation.......................     30,425              844,294
  Halliburton Company...........................     20,248            1,051,631
  Harcourt General, Inc.........................      5,471              299,537
  Harland (John H.) Company (The)...............      2,382               50,022
  Harnischfeger Industries, Inc.................      3,801              134,223
+ Harrah's Entertainment, Inc...................      7,795              147,131
  Harris Corporation............................      6,169              283,003
  Hartford Financial Services                                    
   Group, Inc. (The)............................      9,124              853,664
  Hasbro, Inc...................................      9,805              308,858
  Heinz (H.J.) Company..........................     28,380            1,442,059
  Helmerich & Payne, Inc........................      1,925              130,659
  Hercules Inc..................................      7,466              373,767
  Hershey Foods Corporation.....................     11,051              684,471
  Hewlett-Packard Company.......................     80,398            5,024,875
  Hilton Hotels Corporation.....................     19,347              575,573
  Home Depot, Inc. (The)........................     56,543            3,328,969
  Homestake Mining Company......................     11,323              100,492
  Honeywell Inc.................................      9,847              674,520
  Household International Inc...................      8,270            1,054,942
  Houston Industries Inc........................     22,030              587,926
+ Humana, Inc...................................     12,643              262,342
  Huntington Bancshares Inc.....................     14,781              532,116
+ ITT Corporation...............................      8,981              744,300
  ITT Industries, Inc...........................      9,127              286,360
  Ikon Office Solutions, Inc....................     10,242              288,056
  Illinois Tool Works, Inc......................     19,262            1,158,128
  Inco Limited..................................     12,917              219,589
  Ingersoll-Rand Company........................     12,814              518,967
  Inland Steel Industries, Inc..................      3,773               64,613
  Intel Corporation.............................    126,450            8,883,113
  International Business Machines Corp..........     75,141            7,856,931
  International Flavors & Fragrances Inc........      8,464              435,896
  International Paper Company...................     23,356            1,007,228
  Interpublic Group of Companies, Inc...........      9,735              484,925
  Jefferson-Pilot Corporation...................      5,458              425,042
  Johnson & Johnson.............................    103,947            6,847,509
  Johnson Controls, Inc.........................      6,439              307,462
  Jostens, Inc..................................      2,994               69,049
                                                               
                                      48
<PAGE>
 
              Merrill Lynch S&P 500 Index Fund, December 31, 1997

  SCHEDULE OF INVESTMENTS (continued)

Common
Stocks
(continued)

  Merrill Lynch S&P 500 Index Series (continued)
  ------------------------------------------------------------------------------
                                                     Shares              Value
  Issue                                               Held             (Note 1a)
================================================================================
+ KLA-Tencor Corporation........................      6,540           $  252,607
  Kaufman and Broad Home Corporation............      2,997               67,245
  Kellogg Company...............................     31,759            1,576,040
  Kerr-McGee Corporation........................      3,714              235,143
  KeyCorp Limited...............................     16,980            1,202,396
  Kimberly-Clark Corporation....................     42,309            2,086,363
  King World Productions, Inc...................      2,834              163,664
+ Kmart Corporation.............................     37,699              435,895
  Knight-Ridder, Inc............................      6,527              339,404
  Kroger Co. (The)..............................     19,699              727,632
+ LSI Logic Corporation.........................     10,941              216,085
  Laidlaw, Inc. (Class B).......................     25,383              345,843
  Lilly (Eli) & Company.........................     85,741            5,969,717
  Limited, Inc. (The)...........................     21,016              535,908
  Lincoln National Corporation..................      7,873              615,078
  Liz Claiborne, Inc............................      5,165              215,962
  Lockheed Martin Corporation...................     14,985            1,476,022
  Loews Corporation.............................      8,874              941,753
  Longs Drug Stores Corporation.................      3,009               96,664
  Louisiana-Pacific Corporation.................      8,466              160,854
  Lowe's Companies, Inc.........................     13,490              643,304
  Lucent Technologies, Inc......................     49,560            3,958,605
  MBIA, Inc.....................................      6,892              460,472
  MBNA Corporation..............................     38,738            1,058,032
  MCI Communications Corporation................     53,833            2,304,725
  MGIC Investment Corp..........................      8,814              586,131
  Mallinckrodt Inc..............................      5,637              214,206
  Manor Care, Inc...............................      4,913              171,955
  Marriott International, Inc...................      9,828              680,589
  Marsh & McLennan Companies, Inc...............     13,128              978,856
  Masco Corporation.............................     12,741              648,198
  Mattel, Inc...................................     22,432              835,592
  May Department Stores Company (The)...........     17,876              941,842
  Maytag Corporation............................      7,340              273,874
  McDermott International, Inc..................      4,329              158,550
  McDonald's Corporation........................     53,179            2,539,297
  McGraw-Hill Companies, Inc....................      7,680              568,320
  Mead Corporation (The)........................      8,105              226,940
  Medtronic, Inc................................     36,251            1,896,380
  Mellon Bank Corporation.......................     19,676            1,192,857
  Mercantile Stores Company, Inc................      2,838              172,763
  Merck & Co., Inc..............................     92,616            9,840,450
  Meredith Corporation..........................      4,127              147,282
  Merrill Lynch & Co., Inc......................     25,750            1,878,141
+ Micron Technology, Inc........................     16,335              424,710
+ Microsoft Corporation++.......................     93,267           12,054,760
  Millipore Corporation.........................      3,349              113,657
  Minnesota Mining &                                             
   Manufacturing Company........................     31,586            2,592,026
+ Mirage Resorts, Inc...........................     13,866              315,451
  Mobil Corporation.............................     60,629            4,376,656
  Monsanto Company..............................     45,833            1,924,986
  Moore Corporation Limited                                      
   (NY Registered Shares).......................      6,852              103,636
  Morgan (J.P.) & Co., Inc......................     13,730            1,549,774
  Morgan Stanley, Dean Witter,                                   
   Discover and Co. Inc.........................     45,789            2,707,275
  Morton International, Inc.....................     10,285              353,547
  Motorola, Inc.................................     46,140            2,632,864
  NACCO Industries Inc. (Class A)...............        631               67,635
  NICOR Inc.....................................      3,750              158,203
  Nalco Chemical Company........................      5,172              204,617
  National City Corporation.....................     16,515            1,085,861
+ National Semiconductor Corporation............     12,615              327,202
  National Service Industries, Inc..............      3,339              165,489
  NationsBank Corporation.......................     54,984            3,343,714
+ Navistar International Corporation............      5,817              144,334
  New York Times Company                                         
   (Class A) (The)..............................      7,423              490,846
  Newell Co.....................................     12,265              521,262
  Newmont Mining Corporation....................     12,094              355,261
+ NextLevel Systems, Inc........................     11,432              204,347
+ Niagara Mohawk Power Corp.....................     11,138              116,949
  Nike Inc. (Class B)...........................     22,448              881,084
  Nordstrom, Inc................................      5,963              360,016
  Norfolk & Southern Corporation................     29,143              897,969
  Northern States Power Company.................      5,754              335,170
  Northern Telecom Limited......................     20,248            1,802,072
  Northrop Grumman Corporation..................      5,125              589,375
  Norwest Corporation...........................     58,380            2,254,927
+ Novell, Inc...................................     27,019              202,642
  Nucor Corporation.............................      6,773              327,221
  ONEOK, Inc....................................      2,373               95,810
  Occidental Petroleum Corporation..............     26,183              767,489
  Omnicom Group, Inc............................     12,520              530,535
+ Oracle Corporation............................     75,785            1,690,953
+ Oryx Energy Company...........................      8,171              208,360
  Owens-Corning Fiberglass Corp.................      4,116              140,458
+ Owens-Illinois, Inc...........................     10,838              411,167
  PACAAR, Inc...................................      6,000              315,000
  PECO Energy Company...........................     17,170              416,372

                                      49
<PAGE>
 
  PG & E Corporation............................     33,867          $ 1,030,827
  PNC Bank Corp.................................     23,576            1,345,305
  PP&L Resources, Inc...........................     12,821              306,903
  PPG Industries, Inc...........................     13,767              786,440
  PacifiCorp....................................     22,921              626,030
  Pacific Enterprises, Inc......................      6,438              242,230
  Pall Corporation..............................      9,826              203,275
+ Parametric Technology Corporation.............      9,836              465,980
  Parker-Hannifin Corporation...................      8,614              395,167
  Penney (J.C.) Company, Inc....................     19,318            1,165,117
  Pennzoil Co...................................      3,670              245,202
  Peoples Energy Corporation....................      2,699              106,273
  Pep Boys-Manny, Moe & Jack (The)..............      4,881              116,534
  PepsiCo, Inc..................................    117,259            4,272,625
  Perkin-Elmer Corporation (The)................      3,372              239,623
  Pfizer Inc....................................     99,959            7,453,193
  Pharmacia & Upjohn Inc........................     39,219            1,436,396
  Phelps Dodge Corporation......................      4,542              282,739
  Philip Morris Companies, Inc..................    187,387            8,490,973
  Phillips Petroleum Company....................     20,319              988,011
  Pioneer Hi-Bred International, Inc............      5,081              544,937
  Pitney Bowes Inc..............................     11,193            1,006,670
  Placer Dome, Inc..............................     18,474              234,389
  Polaroid Corporation..........................      3,492              170,017
  Potlatch Corporation..........................      2,229               95,847
  Praxair, Inc..................................     12,190              548,550
  Procter & Gamble Company (The)................    103,880            8,290,922
  Progressive Corporation.......................      5,568              667,464
  Providian Financial Corporation...............      7,353              332,264
  Public Service Enterprise Group, Inc..........     17,924              567,967
  Pulte Corporation.............................      1,638               68,489
  Quaker Oats Company (The).....................     10,703              564,583
  Ralston Purina Company........................      8,207              762,738
  Raychem Corporation...........................      6,645              286,150
  Raytheon Company (Class A)....................     12,913              636,772
  Raytheon Company (Class B)....................     13,288              671,044
+ Reebok International Ltd......................      4,314              124,297
  Republic of New York Corp.....................      4,234              483,470
  Reynolds Metals Company.......................      5,693              341,580
  Rite Aid Corporation..........................      9,639              565,689
  Rockwell International Corporation............     16,127              842,636
  Rohm & Haas Company...........................      4,731              452,993
+ Rowan Companies, Inc..........................      6,682              203,801
  Royal Dutch Petroleum Co.                                      
   (NY Registered Shares).......................    165,738            8,980,928
  Rubbermaid Inc................................     11,558              288,950
  Russell Corporation...........................      2,816               74,800
  Ryder System, Inc.............................      5,913              193,651
  SAFECO Corporation............................     10,909              530,450
  SBC Communications Inc........................     70,844            5,189,323
  Safety-Kleen Corp.............................      4,494              123,304
  Sara Lee Corporation..........................     37,083            2,088,236
  Schering-Plough Corporation...................     56,554            3,513,417
  Schlumberger Ltd..............................     38,233            3,077,756
  Schwab (Charles) Corporation (The)............     20,527              860,851
  Scientific-Atlanta, Inc.......................      6,097              102,125
+ Seagate Technology, Inc.......................     18,887              363,575
  Seagram Company Ltd. (The)....................     27,551              890,242
  Sears, Roebuck and Co.........................     30,284            1,370,351
  Service Corporation International.............     19,440              718,065
  Shared Medical Systems Corporation............      1,928              127,248
  Sherwin-Williams Company (The)................     13,334              370,018
  Sigma-Aldrich Corporation.....................      7,724              307,029
+ Silicon Graphics, Inc.........................     14,471              179,983
  Snap-on, Inc..................................      4,701              205,081
  Sonat Inc.....................................      6,641              303,826
  Southern Company (The)........................     53,341            1,380,198
  Southwest Airlines Co.........................     16,914              416,507
  Spring Industries, Inc........................      1,555               80,860
  Sprint Corporation............................     33,220            1,947,522
+ St. Jude Medical, Inc.........................      7,101              216,580
  St. Paul Companies, Inc.......................      6,476              531,437
  Stanley Works (The)...........................      6,864              323,895
  State Street Corporation......................     12,403              721,700
+ Stone Container Corporation...................      7,656               79,909
  Sun Company, Inc..............................      5,529              232,564
+ Sun Microsystems, Inc.........................     28,956            1,154,620
  SunAmerica, Inc...............................     15,064              643,986
  SunTrust Banks, Inc...........................     16,298            1,163,270
  SuperValu Stores Inc..........................      4,679              195,933
  Synovus Financial Corp........................     13,492              441,863
  Sysco Corporation.............................     13,219              602,291
  TJX Companies, Inc............................     12,609              433,434
  TRW, Inc......................................      9,518              508,023
  Tandy Corporation.............................      7,990              308,114
  Tektronix, Inc................................      3,914              155,337
+ Tele-Communications, Inc. (Class A)...........     39,202            1,095,206
+ Tellabs, Inc..................................     14,026              741,625
  Temple-Inland Inc.............................      4,397              230,018
+ Tenet Healthcare Corporation..................     23,592              781,485
  Tenneco, Inc..................................     13,181              520,649
                                                               
                                      50
<PAGE>
 
              Merrill Lynch S&P 500 Index Fund, December 31, 1997

  SCHEDULE OF INVESTMENTS (concluded)

Common
Stocks
(concluded)

  Merrill Lynch S&P 500 Index Series (concluded)
  ------------------------------------------------------------------------------
                                                     Shares             Value
  Issue                                               Held            (Note 1a)
================================================================================
  Texaco Inc....................................     42,359         $ 2,303,271
  Texas Instruments Inc.........................     30,163           1,357,335
  Texas Utilities Company.......................     19,048             791,682
  Textron Inc...................................     12,738             796,125
+ Thermo Electron Corporation...................     11,696             520,472
  Thomas & Betts Corporation....................      4,245             200,576
  Time Warner Inc...............................     43,269           2,682,678
  Times Mirror Company (The) (Class A)..........      7,392             454,608
  Timken Company (The)..........................      4,868             167,337
  Torchmark Corporation.........................     10,822             455,200
+ Toys `R' Us, Inc..............................     22,074             693,951
  Transamerica Corporation......................      4,886             520,359
  Travelers Group, Inc..........................     88,633           4,775,103
  Tribune Company...............................      9,484             590,379
+ Tricon Global Restaurants, Inc................     11,730             340,903
  Tupperware Corporation........................      4,715             131,431
  Tyco International Ltd........................     41,155           1,854,547
  U S West Communications Group, Inc............     37,342           1,685,058
+ U S West Media Group Inc......................     46,920           1,354,815
  UNUM Corporation..............................     10,724             583,117
  US Bancorp....................................     18,936           2,119,648
+ USAirways Group, Inc..........................      7,055             440,937
  USF & G Corporation...........................      8,708             192,120
  UST Inc.......................................     14,242             526,064
  USX-Marathon Group, Inc.......................     22,292             752,355
  USX-US Steel Group, Inc.......................      6,619             206,844
  Unicom Corp...................................     16,714             513,955
  Unilever N.V. (NY Registered Shares)..........     49,479           3,089,345
  Union Camp Corporation........................      5,358             287,658
  Union Carbide Corporation.....................      9,522             408,851
  Union Electric Company........................     10,588           $ 457,931
  Union Pacific Corporation.....................     19,082           1,191,432
  Union Pacific Resources Group Inc.............     19,611             475,567
+ Unisys Corporation............................     13,588             188,533
  United Healthcare Corporation.................     14,556             723,251
  United States Surgical Corporation............      5,851             171,507
  United Technologies Corporation...............     18,007           1,311,135
  Unocal Corp...................................     19,075             740,348
  V.F. Corporation..............................      9,442             433,742
+ Viacom, Inc. (Class B)........................     27,300           1,131,244
  Wachovia Corporation..........................     15,774           1,279,666
  Wal-Mart Stores, Inc..........................    174,175           6,869,027
  Walgreen Co...................................     38,021           1,192,909
  Warner-Lambert Company........................     21,047           2,609,828
  Washington Mutual Savings Bank................     19,889           1,269,167
  Waste Management Inc..........................     35,169             967,147
  Wells Fargo & Company.........................      6,701           2,274,571
  Wendy's International, Inc....................     10,215             245,798
+ Western Atlas Inc.............................      4,212             311,688
  Westvaco Corporation..........................      7,865             247,256
  Weyerhaeuser Company..........................     15,399             755,513
  Whirlpool Corporation.........................      5,797             318,835
  Whitman Corporation...........................      7,848             204,538
  Willamette Industries, Inc....................      8,594             276,619
  Williams Companies, Inc. (The)................     24,704             700,976
  Winn-Dixie Stores, Inc........................     11,538             504,066
+ Woolworth Corporation.........................     10,420             212,307
+ WorldCom, Inc.................................     69,824           2,112,176
  Worthington Industries, Inc...................      7,453             122,043
  Wrigley (Wm.) Jr. Company (Class B)...........      8,961             712,960
  Xerox Corporation.............................     25,188           1,859,189
- --------------------------------------------------------------------------------
  Total Common Stocks (Cost - $537,951,365) - 96.9%                 583,872,599
================================================================================
Commercial
Paper*
================================================================================
     Face
    Amount                    Short-Term Obligations
================================================================================
$16,349,000  General Motors Acceptance Corp., 6.75% due
              1/02/1998                                              16,345,935
================================================================================
Total Short-Term Obligations (Cost--$16,345,935)--2.7%               16,345,935
================================================================================
Total Investments (Cost--$554,297,300)--99.6%                       600,218,534
Variation Margin on Financial Futures Contracts**--0.0%                    (806)

                                      51
<PAGE>
 
Other Assets Less Liabilities--0.4%                                   2,582,773
                                                                   ------------
Net Assets--100.0%                                                 $602,800,501
                                                                   ============
================================================================================
+     Non-income producing security.
++    Portion of securities held as collateral for open financial futures
      contracts.
*     Commercial Paper is traded on a discount basis; the interest rate shown is
      the discount rate paid at the time of purchase by the Fund.
**    Financial futures contracts purchased as of December 31, 1997 were
      as follows:

- --------------------------------------------------------------------------------
   Number of                                   Expiration           Value
   Contracts             Issue                    Date         (Notes 1a & 1b)
- --------------------------------------------------------------------------------
       78        S&P 500 Stock Index           March 1998       $19,092,450
- --------------------------------------------------------------------------------
Total Financial Futures Contracts
Purchased (Total Contract Price-- $18,962,809)                  $19,092,450
                                                                ===========
- --------------------------------------------------------------------------------

See Notes to Financial Statements.

STATEMENT OF ASSETS AND LIABILITIES

<TABLE>
<CAPTION>
MERRILL LYNCH
S&P 500
INDEX SERIES  As of December 31, 1997
=================================================================================================================================
<S>                                                                                                      <C>         <C>         
Assets:       Investments, at value (identified cost--$554,297,300) (Note 1a)..........................              $600,218,534
              Cash.....................................................................................                    50,750
              Receivables:
                Contributions..........................................................................  $2,639,531
                Dividends..............................................................................     844,810
                Securities sold........................................................................     174,405     3,658,746
                                                                                                         ----------
              Deferred organization expenses (Note 1e).................................................                    13,247
                                                                                                                     ------------
              Total assets.............................................................................               603,941,277
                                                                                                                     ------------
=================================================================================================================================
Liabilities:  Payables:
                Withdrawals............................................................................     809,352
                Securities purchased...................................................................     148,701
                Variation margin (Note 1b).............................................................         806       958,859
                                                                                                         ----------
              Accrued expenses and other liabilities...................................................                   181,917
                                                                                                                     ------------
              Total liabilities .......................................................................                 1,140,776
                                                                                                                     ------------
=================================================================================================================================
Net Assets:   Net assets...............................................................................              $602,800,501
                                                                                                                     ============
=================================================================================================================================
Net Assets    Partners' capital........................................................................              $556,749,626
Consist of:   Unrealized appreciation on investments--net..............................................                46,050,875
                                                                                                                     ------------
              Net assets...............................................................................              $602,800,501
                                                                                                                     ============
=================================================================================================================================
</TABLE>

              See Notes to Financial Statements.


                                      52
<PAGE>
 
              Merrill Lynch S&P 500 Index Fund, December 31, 1997

STATEMENT OF OPERATIONS

<TABLE>
<CAPTION>
MERRILL LYNCH
S&P 500
INDEX SERIES         For the Period April 3, 1997+ to December 31, 1997
=========================================================================================================================
<S>                                                                                               <C>         <C>        
Investment Income    Dividends (net of $32,040 foreign withholding tax).........................              $ 4,811,633
(Notes 1c & 1d):     Interest and discount earned...............................................                1,457,105
                                                                                                              -----------
                     Total income...............................................................                6,268,738
                                                                                                              -----------
=========================================================================================================================
Expenses:            Accounting services (Note 2)...............................................  $  192,752
                     Investment advisory fees (Note 2)..........................................     148,645
                     Custodian fees.............................................................     101,973
                     Professional fees..........................................................      30,104
                     Pricing fees...............................................................       9,450
                     Trustees' fees and expenses................................................       5,797
                     Amortization of organization expenses (Note 1e)............................       2,338
                     Other......................................................................       2,760
                                                                                                  ----------
                     Total expenses before reimbursement........................................     493,819
                     Reimbursement of expenses (Note 2).........................................   (148,645)
                                                                                                  ----------
                     Total expenses after reimbursement.........................................                  345,174
                                                                                                              -----------
                     Investment income--net.....................................................                5,923,564
                                                                                                              -----------
=========================================================================================================================
Realized &           Realized gain from investments--net........................................               20,857,044
Unrealized Gain on   Unrealized appreciation on investments--net................................               46,050,875
Investments--Net                                                                                              -----------
(Notes 1b, 1d & 3):  Net Increase in Net Assets Resulting from Operations.......................              $72,831,483
                                                                                                              ===========
=========================================================================================================================
</TABLE>
                   + Commencement of operations.
                     See Notes to Financial Statements.

                                      53
<PAGE>
 
STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
MERRILL LYNCH                                                                                                 For the Period
S&P 500                                                                                                     April 3, 1997+ to
INDEX SERIES         Increase (Decrease) in Net Assets:                                                     December 31, 1997
=============================================================================================================================
<S>                                                                                                           <C>         
Operations:          Investment income--net.................................................................  $  5,923,564
                     Realized gain on investments--net......................................................    20,857,044
                     Unrealized appreciation on investments--net............................................    46,050,875
                                                                                                              ------------
                     Net increase in net assets resulting from operations...................................    72,831,483
                                                                                                              ------------
=============================================================================================================================
Net Capital          Increase in net assets derived from net capital contributions..........................   529,969,018
Contributions:                                                                                                ------------
=============================================================================================================================
Net Assets:          Total increase in net assets...........................................................   602,800,501
                     Beginning of period....................................................................            --
                                                                                                              ------------
                     End of period..........................................................................  $602,800,501
                                                                                                              ============
=============================================================================================================================
</TABLE>
                   + Commencement of operations.
                     See Notes to Financial Statements.

                                      54

<PAGE>
 
              Merrill Lynch S&P 500 Index Fund, December 31, 1997

FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>
MERRILL LYNCH                                                                                                    For the Period
S&P 500            The following ratios have been derived from                                                 April 3, 1997+ to
INDEX SERIES       information provided in the financial statements.                                           December 31, 1997
=================================================================================================================================
<S>                                                                                                                    <C>  
Ratios to Average  Expenses, net of reimbursement............................................................               .12%*
Net Assets:                                                                                                            ========
                   Expenses..................................................................................               .17%*
                                                                                                                       ========
                   Investment income--net....................................................................              1.99%*
                                                                                                                       ========
=================================================================================================================================
Supplemental       Net assets, end of period (in thousands)..................................................          $602,801
Data:                                                                                                                  ========
                   Portfolio turnover........................................................................             24.31%
                                                                                                                       ========
                   Average commission rate paid..............................................................          $  .0166
                                                                                                                       ========
=================================================================================================================================
</TABLE>
                 * Annualized.
                 + Commencement of operations.
                   See Notes to Financial Statements.

NOTES TO FINANCIAL STATEMENTS

MERRILL LYNCH
S&P 500
INDEX SERIES

1. Significant Accounting Policies:

Merrill Lynch S&P 500 Index Series (the "Series") is part of Merrill Lynch Index
Trust (the "Trust"). The Trust is registered under the Investment Company Act of
1940 and is organized as a Delaware business trust. The following is a summary
of significant accounting policies followed by the Series.

(a) Valuation of investments--Portfolio securities which are traded on stock
exchanges are valued at the last sale price as of the close of business on the
day the securities are being valued or, lacking any sales, at the closing bid
price. Securities traded in the over-the-counter market are valued at the last
quoted bid price at the close of trading on the New York Stock Exchange on each
day by brokers that make markets in the securities. Securities traded in the
NASDAQ National Market System are valued at the last sale price prior to the
time of valuation. Portfolio securities which are traded both on the
over-the-counter market and on a stock exchange are valued according to the
broadest and most representative market. Options written are valued at the last
sale price in the case of exchange-traded options or, in the case of options
traded in the over-the-counter market, the last asked price. Options purchased
are valued at the last sale price in the case of exchange-traded options or, in
the case of options traded in the over-the-counter market, the last bid price.
Other investments, including futures contracts and related options, are stated
at market value. Short-term securities are valued at amortized cost, which
approximates market value. Securities and assets for which market quotations are
not readily available are valued at fair market value, as determined in good
faith by or under the direction of the Trust's Board of Trustees.

(b) Derivative financial instruments--The Series may engage in various portfolio
investment techniques to provide liquidity, or in connection with the Series'
arbitrage strategies. Losses may arise due to changes in the value of the
contract or if the counterparty does not perform under the contract.

o Financial futures contracts--The Series may purchase or sell stock index
futures contracts and options on such futures contracts as a proxy for a direct
investment in securities underlying the Series' index. Upon entering into a
contract, the Series deposits and maintains as collateral such initial margin as
required by the exchange on which the transaction is effected. Pursuant to the
contract, the 

                                      55
<PAGE>
 
Series agrees to receive from or pay to the broker an amount of cash equal to
the daily fluctuation in value of the contract. Such receipts or payments are
known as variation margin and are recorded by the Series as unrealized gains or
losses. When the contract is closed, the Series records a realized gain or loss
equal to the difference between the value of the contract at the time it was
opened and the value at the time it was closed.

o Options--The Series is authorized to purchase and write call and put options.
When the Series writes an option, an amount equal to the premium received by the
Series is reflected as an asset and an equivalent liability. The amount of the
liability is subsequently marked to market to reflect the current market value
of the option written. When a security is purchased or sold through an exercise
of an option, the related premium paid (or received) is added to (or deducted
from) the basis of the security acquired or deducted from (or added to) the
proceeds of the security sold. When an option expires (or the Series enters into
a closing transaction), the Series realizes a gain or loss on the option to the
extent of the premiums received or paid (or a gain or loss to the extent that
the cost of the closing transaction exceeds the premium paid or received).

Written and purchased options are non-income producing investments.

(c) Income taxes - The Series is classified as a partnership for Federal income
tax purposes. As a partnership for Federal income tax purposes, the Series will
not incur Federal income tax liability. Items of partnership income, gain, loss
and deduction will pass through to investors as partners in the Series.
Therefore, no Federal income tax provision is required. Under the applicable
foreign tax law, a withholding tax may be imposed on interest, dividends, and
capital gains at various rates.

(d) Security transactions and investment income--Security transactions are
accounted for on the date the securities are purchased or sold (the trade
dates). Dividend income is recorded on the ex-dividend dates. Interest income
(including amortization of discount) is recognized on the accrual basis.
Realized gains and losses on security transactions are determined on the
identified cost basis.

(e) Deferred organization expenses--Deferred organization expenses are charged
to expense on a straight-line basis over a five-year period.

2. Investment Advisory Agreement and Transactions with Affiliates:

The Series has entered into an Investment Advisory Agreement with Merrill Lynch
Asset Management, L.P. ("MLAM"). The general partner of MLAM is Princeton
Services, Inc. ("PSI"), an indirect wholly-owned subsidiary of Merrill Lynch &
Co., Inc. ("ML & Co."), which is the limited partner.

MLAM is responsible for the management of the Fund's portfolio and provides the
necessary personnel, facilities, equipment and certain other services necessary
to the operations of the Fund. For such services, the Series pays a monthly fee
at an annual rate of 0.05% of the average daily value of the Series' net assets.
For the period ended December 31, 1997, MLAM earned fees of $148,645, all of
which was voluntarily waived.

Accounting services are provided to the Series by MLAM at cost.

Certain officers and/or trustees of the Series are officers and/or directors of
MLAM, PSI, and/or ML & Co.

3. Investments:

Purchases and sales of investments, excluding short-term securities, for the
period April 3, 1997 to December 31, 1997 were $605,389,191 and $82,632,635,
respectively.

Net realized and unrealized gains as of December 31, 1997 were as follows:

- -----------------------------------------------------------------------
                                          Realized           Unrealized
                                           Gains               Gains
- -----------------------------------------------------------------------
Long-term investments ...............    $15,194,809        $45,921,234
Financial futures contracts .........      5,662,235            129,641
                                         -----------        -----------
Total ...............................    $20,857,044        $46,050,875
                                         ===========        ===========
- -----------------------------------------------------------------------

As of December 31, 1997, net unrealized appreciation for Federal income tax
purposes aggregated $45,650,104, of which $59,621,968 related to appreciated
securities and $13,971,864 related to depreciated securities. At December 31,
1997, the aggregate cost of investments for Federal income tax purposes was
$554,568,430.

                                      56
<PAGE>

     
INDEPENDENT AUDITORS' REPORT
 
The Board of Trustees and Investors of 
Merrill Lynch Index Trust:

We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Merrill Lynch Small Cap Index Series (one of the
series constituting Merrill Lynch Index Trust) as of December 31, 1997, the
related statements of operations and changes in net assets, and the financial
highlights for the period April 9, 1997 (commencement of operations) to December
31, 1997. These financial statements and the financial highlights are the
responsibility of the Trust's management. Our responsibility is to express an
opinion on these financial statements and the financial highlights based on our
audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements and the financial highlights
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. Our
procedures included confirmation of securities owned at December 31, 1997 by
correspondence with the custodian and brokers. An audit also includes assessing
accounting principles used and significant estimates made by management, as well
as evaluating the overall financial statement presentation. We believe that our
audit provides a reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of Merrill Lynch Small 
Cap Index Series of the Merrill Lynch Index Trust as of December 31, 1997, the
results of its operations, the changes in its net assets, and the financial
highlights for the period April 9, 1997 to December 31, 1997 in conformity with
generally accepted accounting principles.

/s/ Deloitte & Touche LLP

Deloitte & Touche LLP
Princeton, New Jersey
February 18, 1998

     

                                      57
<PAGE>
 
SCHEDULE OF INVESTMENTS

  Merrill Lynch Small Cap Index Series
- ------------------------------------------------------------------------------
                                                          Shares       Value
  Issue                                                     Held     (Note 1a)
==============================================================================
  COMMON STOCKS

  AAR Corporation                                          2,100     $ 81,375
  ABM Industries, Inc.                                     2,900       88,631
  ABR Information Services, Inc.                           2,500       59,688
+ ABT Building Products Corporation                        1,800       32,400
  ACC Corp.                                                1,500       75,750
  ACNielsen Corporation                                    5,800      141,375
  ADAC Laboratories                                        2,300       45,425
+ ADVO, Inc.                                               3,800       74,100
  AGL Resources, Inc.                                      5,800      118,538
  AK Steel Holding Corporation                             4,400       77,825
  ALBANK Financial Corporation                             1,600       82,300
  AMCOL International Corp.                                4,350       69,056
  AMCORE Financial Inc.                                    3,000       75,375
  AMETEK, Inc.                                             3,100       83,700
+ AMRESCO, Inc.                                            4,100      124,025
+ ANADIGICS, Inc.                                          1,500       45,188
+ ANTEC Corporation                                        2,800       43,750
+ APAC Teleservices, Inc.                                  1,700       22,950
  ASA Holdings, Inc.                                       2,300       65,406
+ ATL Ultrasound, Inc.                                     1,600       73,600
  Aames Financial Corporation                              2,100       27,169
+ Abacus Direct Corporation                                1,400       57,400
+ Acceptance Insurance Holdings, Inc.                      1,700       41,119
+ Access Health, Inc.                                      1,700       49,938
+ Acme Metals, Inc.                                        3,700       36,538
+ Actel Corp.                                              2,200       27,775
+ Action Performance Companies, Inc.                       1,500       56,813
+ Acuson Corporation                                       2,300       38,094
  Acxiom Corp.                                             5,100       98,175
+ Ade Corporation                                            700       12,250
+ Adtran, Inc.                                             3,000       82,500
+ Advanced Tissue Sciences, Inc.                           3,300       40,425
+ Affiliated Computer Services, Inc.                       4,000      105,250
+ Affymetrix, Inc.                                         2,500       77,813
+ Aftermarket Technology Corp.                             2,000       36,250
+ Agouron Pharmaceuticals, Inc.                            2,600       76,375
  Air Express International Corporation                    3,500      106,750
  Airborne Freight Corporation                             2,000      124,250
+ AirTran Holdings, Inc.                                   2,800       11,200
+ Alaska Air Group, Inc.                                   1,100       42,625
  Albany International Corp. (Class A)                     3,000       69,000
  Albemarle Corporation                                    2,500       59,688
+ Alexander's, Inc.                                          400       36,325
+ Algos Pharmaceutical Corporation                         1,500       45,000
  Aliant Communications, Inc.                              3,800      119,225
+ Alkermes, Inc.                                           2,000       39,750
+ Allen Telecom Inc.                                       3,500       64,531
+ Alliance Pharmaceutical Corporation                      5,500       39,875
+ Alliance Semiconductor Corporation                       2,500       11,406
+ Alliant Techsystems, Inc.                                1,900      105,925
  Allied Capital Commercial Corporation                    1,920       42,720
  Allied Group, Inc.                                       3,150       90,169
+ Allied Waste Industries, Inc.                            7,700      179,506
  Alpharma, Inc. (Class A)                                 1,634       35,540
+ Alternative Resources Corp.                              1,700       39,206
+ Amati Communications Corporation                         2,100       41,344
+ Amerco                                                   1,400       35,875
+ America West Holdings Corp. (Class B)                    3,800       70,775
+ American Business Information, Inc. (Class A)            1,500       14,625
+ American Business Information, Inc. (Class B)            1,500       15,375


                                      58
<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

  Merrill Lynch Small Cap Index Series (continued)
- ------------------------------------------------------------------------------
                                                          Shares       Value
  Issue                                                     Held     (Note 1a)
==============================================================================
  COMMON STOCKS
  (continued)

  American Health Properties, Inc.                         1,800     $ 49,613
+ American Management Systems, Inc.                        4,300       83,850
  American Mobile                                          1,700       11,900
+ American Oncology Resources, Inc.                        4,400       70,400
+ American Pad & Paper Company                             3,400       32,725
+ American Radio Systems Corp.                             1,900      101,294
+ American Residential Services, Inc.                      1,800       28,125
+ AmeriCredit Corp.                                        2,700       74,756
+ Amerin Corporation                                       2,500       70,000
+ AmeriSource Health Corp. (Class A)                       2,500      145,625
  Ames Department Stores, Inc.                             3,600       63,000
+ Amphenol Corp. (Class A)                                 1,700       94,669
+ Amylin Pharmaceuticals, Inc.                             2,000       10,875
  Analysts International Corp.                             2,700       93,150
  Anchor Bancorp, Inc.                                     1,900       69,113
+ Anchor Gaming                                              600       33,450
+ Andrx Corporation                                        1,000       34,250
+ Anixter International Inc.                               4,900       80,850
+ AnnTaylor Stores Corporation                             2,700       36,113
  Apogee Enterprises, Inc.                                 3,800       45,125
  Apple South, Inc.                                        3,100       40,688
  Applebee's International, Inc.                           3,200       57,800
  Applied Industrial Technologies, Inc.                    2,850       76,238
+ Applied Magnetics Corp.                                  3,500       38,938
  Applied Power Inc. (Class A)                             1,800      124,200
+ Apria Healthcare Group, Inc.                             5,100       68,531
  AptarGroup, Inc.                                         2,200      122,100
  Aquarion Company                                         2,400       82,950
  Arbor Drugs, Inc.                                        5,200       96,200
+ Arbor Software Corp.                                     1,200       48,600
+ Arcadia Financial Ltd.                                   3,000       22,313
  Arctic Cat, Inc.                                         2,400       23,250
  Arden Realty Group, Inc.                                 7,700      236,775
  Argonaut Group, Inc.                                     1,900       64,363
+ Armco, Inc.                                             10,400       51,350
  Arnold Industries, Inc.                                  2,600       44,850
  Arrow International, Inc.                                1,600       59,200
+ Arterial Vascular Engineering, Inc.                      3,100      201,500
  Arvin Industries, Inc.                                   2,300       76,619
+ Ascent Entertainment Group, Inc.                         3,200       33,200
  Aspect Development, Inc.                                   900       46,800
  Aspect Telecommunications Corp.                          6,900      144,038
  Aspen Technologies, Inc.                                 2,200       75,350
  Associated Banc-Corp                                     4,671      257,489
  Associated Estates Realty Corp.                          4,000       94,750
+ Associated Group, Inc. (Class A)                         2,600       77,025
  Astoria Financial Corp.                                  1,900      105,925
+ Asyst Technologies, Inc.                                   900       19,575
  Atlantic Energy, Inc.                                    5,300      112,294
+ Atlas Air, Inc.                                            800       19,200
  Atmos Energy Corporation                                 3,300       99,825
+ Atwood Oceanics, Inc.                                    1,400       66,325
+ Auspex Systems, Inc.                                     3,200       32,000
  Authentic Fitness Corp.                                  3,100       57,156
+ Avant Corporation                                        2,300       38,525
+ Avid Technology, Inc.                                    2,500       66,875
+ Aztar Corporation                                        4,100       25,625
  BB&T Corporation                                         1,588      101,731
+ BE Aerospace, Inc.                                       2,700       72,225
  B.F. Goodrich Company (The)                              1,680       69,615
+ BISYS Group, Inc.                                        3,300      109,725
+ BJ's Wholesale Club, Inc.                                3,500      109,813
  BMC Industries, Inc.                                     3,300       53,213
  BREED Technologies, Inc.                                 2,700       49,275
+ BT Office Products International, Inc.                   2,100       16,275
+ Baan Company, N.V.                                         640       20,960
  Baldor Electric Company                                  4,267       92,533
  Ball Corp.                                               3,100      109,469
  Ballard Medical Products                                 3,500       84,875
  BancorpSouth, Inc.                                       2,000       94,500
+ BancTec, Inc.                                            2,600       69,713
  Bank of Granite Corp.                                    1,400       43,050
  Bank United Corp. (Class A)                              4,500      220,219
  Banknorth Group, Inc.                                    1,000       64,250
  Banta Corporation                                        3,200       86,400
+ Barnett Banks, Inc.                                      2,200       48,400
+ Barr Laboratories, Inc.                                    700       23,888
+ Barrett Resources Corp.                                  3,300       99,825
  Bassett Furniture Industries, Inc.                       1,500       45,000
  Bay Apartment Communities, Inc.                          2,100       81,900
  Bay State Gas Company                                    2,400       89,100
  Belden, Inc.                                             3,700      130,425
+ Bell & Howell Co. (Series B)                             1,600       38,700
+ Benchmark Electronics, Inc.                              1,700       37,931
+ Benton Oil & Gas Co.                                     4,500       58,219
  Berkley (W.R.) Corporation                               1,900       83,363
  Berkshire Realty Company, Inc.                           2,300       27,600
  Berry Petroleum Co. (Class A)                            3,900       68,006
+ Best Buy Co., Inc.                                       3,200      118,000
+ Big Flower Press Holdings, Inc.                          2,300       55,488
+ Billing Information Concepts                             2,300      110,400
+ Biomatrix, Inc.                                          1,100       33,000
+ Bio-Rad Laboratories, Inc. (Class A)                     1,400       36,575
+ Bio Technology General Corp.                             7,700       82,775


                                      59
<PAGE>
 
  Birmingham Steel Corp.                                   2,900       45,675
+ Black Box Corporation                                    1,800       63,675
  Black Hills Corporation                                  2,700       95,175
  Block Drug Company, Inc. (Class A)                         927       39,398
  Blount International, Inc. (Class A)                     2,600       69,388
  Bob Evans Farms, Inc.                                    5,000      110,625
  Boole & Babbage, Inc.                                    2,300       68,713
+ Borland International, Inc.                              3,100       22,669
+ Boston Beer Company, Inc. (Class A)                      2,000       15,625
+ Boston Technology, Inc.                                  2,500       62,813
  Bowne & Co., Inc.                                        1,800       71,775
+ Boyd Gaming Corporation                                  3,800       25,175
  Brady (W.H.) Company (Class A)                           2,800       86,800
  Brightpoint, Inc.                                        4,600       63,825
+ Brinker International, Inc.                              7,500      120,000
+ Bristol Hotel Company                                    3,100       90,094
+ Broderbund Software, Inc.                                2,500       64,063
  Brush Wellman, Inc.                                      2,300       56,350
  Buckeye Technologies Inc.                                2,400      111,000
+ Budget Group, Inc.                                       1,600       55,300
+ Buffets, Inc.                                            4,700       44,063
  Burlington Coat Factory Warehouse Corp.                  2,040       33,533
+ Burlington Industries, Inc.                              6,600       91,163
  Burnham Pacific Properties, Inc.                         7,200      110,250
  Burr-Brown Corp.                                         2,500       80,313
  CBL & Associates Properties, Inc.                        1,900       46,906
  CCB Financial Corp.                                        800       86,000
+ CCC Information Services Group, Inc.                     2,500       49,375
+ CDI Corporation                                          1,500       68,625
+ CDW Computer Centers, Inc.                               1,100       57,338
+ CHS Electronics, Inc.                                    2,250       38,531
  CILCORP, Inc.                                            2,300      112,413
  CKE Restaurants, Inc.                                    4,600      193,775
  CMAC Investment Corp.                                    2,800      169,050
  CNB Bancshares, Inc.                                     1,965       94,688
+ CNET, Inc.                                                 800       23,600
  COMSAT Corporation                                       4,600      111,550
+ CONMED Corporation                                       1,700       44,625
+ COR Therapeutics, Inc.                                   3,400       76,500
  CORESTAFF, Inc.                                          3,300       87,450
+ CORT Business Services Corp.                             2,400       95,550
  CPI Corporation                                          2,000       45,250
  CRIIMI MAE, Inc.                                         3,000       45,000
+ CSG Systems International, Inc.                          2,700      108,000
+ CSS Industries, Inc.                                     1,700       54,188
+ CUNO Incorporated                                        2,300       35,075
+ Cable Design Technologies                                1,800       69,975
+ Cable Michigan, Inc.                                       300        6,825
+ Cablevision System Corp.                                 1,500      143,625
  Cabot Oil & Gas Corp.                                    3,300       64,144
  Calgon Carbon Corporation                                5,500       59,125
+ California Microwave, Inc.                               1,600       31,000
  California Water Service Co.                             1,000       59,063
  CalMat Company                                           2,300       64,113
+ Calpine Corporation                                      2,800       41,650
  Cambrex Corporation                                      1,600       73,600
  Camden Property Trust                                    2,432       75,392
+ Canandaigua Brands, Inc. (Class A)                       1,900      105,213
+ Canandaigua Wine Company, Inc.                           1,100       62,700
  Capital Bancorp/Miami, Florida                           1,100       63,594
  Capital Re Corporation                                   1,700      105,506
  CapMAC Holdings Inc.                                     1,600       55,600
+ CapStar Hotel Company                                    3,600      123,525
  Caraustar Industries, Inc.                               3,100      106,175
+ Carbide/Graphite Group, Inc. (The)                       1,300       43,875
+ Caribiner International, Inc.                            1,200       53,400
  Carlisle Companies, Inc.                                 2,600      111,150
+ Carmike Cinemas, Inc. (Class A)                          2,500       71,719
  Carpenter Technology Corporation                         1,900       91,319
+ Carson Pirie Scott & Company                             2,100      105,263
  Carter-Wallace, Inc.                                     2,600       43,875
  Casey's General Stores, Inc.                             3,700       93,888
  Cash America International, Inc.                         5,600       72,450
  Castle (A.M.) & Company                                  2,000       45,750
+ Castle & Cooke, Inc.                                     3,000       50,625
  Catalina Marketing Corporation                           2,900      134,125
+ C-Cube Microsystems, Inc.                                3,700       60,356
+ CellNet Data Systems, Inc.                               3,800       29,450
+ CellStar Corporation                                     1,300       25,838
+ Cellular Communications International, Inc.              1,100       50,875
+ Centennial Cellular Corporation (Class A)                1,800       36,900
  CenterPoint Properties Corp.                             1,200       42,150
+ Central Garden & Pet Company                             1,900       49,875
  Central Hudson Gas & Electric                            2,600      114,075
  Central Louisiana Electric                               2,900       93,888
  Central Maine Power Company                              5,300       80,825
  Central Parking Corporation                              1,500       67,969
  Century Aluminum Company                                 2,900       39,150
+ Cephalon, Inc.                                           3,100       35,263
+ Cerner Corporation                                       2,700       57,038
+ Champion Enterprises, Inc.                               5,600      115,150
+ Chancellor Media Corp.                                   1,181       88,132
+ Charming Shoppes, Inc.                                  11,500       53,906
  Charter One Financial, Inc.                              1,051       66,344

                                      60
<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

  Merrill Lynch Small Cap Index Series (continued)
- ------------------------------------------------------------------------------
                                                          Shares       Value
  Issue                                                     Held     (Note 1a)
==============================================================================
  COMMON STOCKS
  (continued)

+ CheckFree Holdings Corporation                           4,500     $121,500
+ Checkpoint Systems, Inc.                                 3,800       66,500
+ Cheesecake Factory (The)                                 2,000       61,000
  ChemFirst Inc.                                           2,700       76,275
  Chesapeake Corporation                                   1,900       65,313
  Chesapeake Energy Corp.                                  3,400       25,713
  Chicago Miniature Lamp, Inc.                             1,100       37,125
+ Chips & Technologies, Inc.                               1,900       27,431
  Chittenden Corporation                                   2,250       78,750
+ Choice Hotels International, Inc.                        5,000       80,000
  Church & Dwight Co., Inc.                                2,200       61,738
+ Ciber, Inc.                                                900       52,200
+ Cidco, Inc.                                              1,600       31,200
  Cincinnati Milacron, Inc.                                3,400       88,188
+ Cirrus Logic, Inc.                                       5,500       58,438
  CitFed Bancorp, Inc.                                     1,950       76,050
+ Citrix Systems, Inc.                                     2,800      212,800
+ Cityscape Financial Corp.                                1,200          600
  Claire's Stores, Inc.                                    4,500       87,469
  Clarcor, Inc.                                            2,400       71,100
+ Claremont Technology Group, Inc.                         1,100       20,350
+ Clarify Inc.                                             2,100       24,413
+ Cliffs Drilling Company                                  1,500       74,813
+ Closure Medical Corporation                              1,100       28,463
+ Coach USA, Inc.                                          2,200       73,700
+ Coast Savings Financial, Inc.                            2,200      150,838
+ Coeur D'Alene Mines Corporation                          6,900       62,100
+ Cognex Corporation                                       4,100      111,725
+ Coherent, Inc.                                           1,300       45,663
  Cohu, Inc.                                               1,000       30,625
+ Cole National Corporation                                1,600       47,900
+ Collins & Aikman Corp.                                   7,600       65,550
  Colonial BancGroup, Inc.                                 2,700       92,981
  Colonial Properties Trust                                2,400       72,300
+ Columbia Laboratories, Inc.                              3,000       47,625
  Commerce Bancorporation Inc.                             2,000      102,000
  Commerce Group, Inc.                                     2,200       71,775
  Commercial Federal Corp.                                 3,000      106,688
  Commercial Metals Co.                                    1,900       59,969
+ Commnet Cellular, Inc.                                   1,400       49,788
  Commonwealth Bancorp, Inc.                               2,200       43,725
+ Commonwealth Telephone Enterprises, Inc.                 1,000       25,875
  Community First Bankshares, Inc.                         2,700      143,775
+ Compdent Corporation                                       900       18,253
+ Computer Horizons Corporation                            2,750      123,750
+ Computer Products, Inc.                                  2,500       56,563
  Computer Task Group, Inc.                                1,800       64,013
+ Computervision Corporation                               5,200       19,825
+ Comverse Technology, Inc. (New Shares)                   2,600      101,400
+ Concentra Managed Care, Inc.                             2,671       90,146
+ Consolidated Freightways Corporation                     2,800       38,150
+ Consolidated Graphics, Inc.                                800       37,300
+ Consolidated Products, Inc.                              3,250       53,219
+ Converse, Inc.                                           2,100       12,600
+ Cooper Companies, Inc.                                   1,300       53,138
  Coors (Adolph) Co. (Class B)                             3,600      119,700
+ CopyTele, Inc.                                           4,100       14,350
  Cornerstone Properties, Inc.                             3,500       67,156
  Cousins Properties, Inc.                                 2,100       61,556
+ Covance, Inc.                                            6,200      123,225
+ Coventry Ventures, Inc.                                  4,400       67,100
  Crawford & Company (Class B)                             5,800      118,538
+ Creative BioMolecules, Inc.                              3,400       25,075
+ Credence Systems Corp.                                   2,200       65,175
+ Credit Acceptance Corp.                                  1,600       12,400
+ Crescent Operating, Inc.                                   570       13,965
  Cross Timbers Oil Company                                3,800       94,763
  Cullen/Frost Bankers, Inc.                               2,100      127,444
+ Culligan Water Technologies, Inc.                        2,694      135,374
+ Curative Health Services, Inc.                           1,300       39,488
+ Cygnus, Inc.                                             1,900       37,763
+ Cymer, Inc.                                              2,600       39,000
  Cytogen Corp.                                            4,300        6,988
+ Cytyc Corporation                                        1,700       42,288
  DII Group, Inc.                                          2,200       59,950
  D.R. Horton, Inc.                                        1,200       20,850
  DSP Communications, Inc.                                 4,500       54,000
+ Dal-Tile International Inc.                              3,800       46,550
+ Dames & Moore Group                                      1,900       25,175
  Daniel Industries                                          900       17,325
+ Data Dimensions, Inc.                                    1,100       18,975
  Data General Corporation                                 3,600       62,775
  Data Transmission Network Corp.                          1,400       39,200
+ Datascope Corp.                                          1,900       49,163
  Dekalb Genetics Corporation (Class B)                    3,000      117,750
  Delmarva Power & Light Company                           6,000      138,375
+ Delphi Financial Group, Inc. (Class A)                   2,500      112,500
  Delta & Pine Land Company                                4,710      143,655
  Deltic Timber Corporation                                1,600       43,800
  Department 56, Inc.                                      2,800       80,500
  Devon Energy Corporation                                 2,800      107,800
  Devry, Inc.                                              3,800      121,125
  Dexter Corporation (The)                                 2,300       99,331
+ Dialogic Corporation                                     1,200       52,500

                                      61
<PAGE>
 
  Diamond Multimedia Systems, Inc.                         3,200       28,400
  Digital Microwave Corp.                                  5,100       73,950
  Dime Bancorp, Inc.                                       1,644       49,731
  Dimon, Inc.                                              5,000      131,250
  Dionex Corporation                                       1,800       90,450
+ Documentum, Inc.                                         1,000       42,125
+ Dominick's Supermarkets, Inc.                            1,700       62,050
  Donaldson Company, Inc.                                  2,200       99,138
  Downey Financial Corp.                                   1,900       54,031
+ Dress Barn, Inc. (The)                                   2,500       70,938
  Dreyers Grand Ice Cream, Inc.                            2,800       67,550
  Dynatech Corporation                                     1,700       79,688
  Dynex Capital, Inc.,                                     3,800       50,588
  EG & G, Inc.                                             4,700       97,819
+ ENCAD, Inc.                                              1,300       35,750
  ESS Technology, Inc.                                     1,600       12,150
  E'Town Corporation                                       2,000       80,375
+ E* Trade Group, Inc.                                     3,200       73,600
+ EXCEL Communications, Inc.                               1,063       15,414
  Eagle Hardware & Garden, Inc.                            3,000       58,125
  Earthgrains Company (The)                                2,100       98,700
  Eastern Enterprises                                      2,200       99,000
  Eastern Utilities Associates                             4,100      107,625
  Eaton Vance Corp.                                        1,700       64,175
  Elcor Corp.                                              2,250       54,000
+ Electro Scientific Industries, Inc.                      1,000       38,000
  Electroglas, Inc.                                        3,200       49,400
  Emmis Broadcasting Corp. (Class A)                       1,000       45,625
  Empire District Electric Company (The)                   4,400       86,350
+ Encore Wire Corporation                                    900       27,619
  Enhanced Financial Services Group, Inc.                  1,700      101,150
  Envoy Corporation                                        2,600       75,725
  Enzo Biochem, Inc.                                       2,100       30,713
  Equitable Resources, Inc.                                3,700      130,888
  Equity Inns Inc.                                         4,000       59,000
+ Essex International Inc.                                 1,800       53,550
  Esterline Technologies Corporation                       1,200       43,200
  Etec Systems, Inc.                                       2,400      111,600
  Ethan Allen Interiors, Inc.                              3,200      123,400
  Exabyte Corporation                                      2,700       17,381
  Excel Realty Trust, Inc.                                 1,600       50,400
  Executive Risk Inc.                                      1,800      125,663
  Exide Corporation                                        1,900       49,163
  Expeditors International of Washington, Inc.             2,800      107,800
  Express Scripts, Inc. (Class A)                          1,300       78,000
  F & M National Corp.                                     2,600       89,213
  FBL Financial Group, Inc.                                1,900       76,238
+ FEI Company                                              1,800       22,388
  F.N.B. Corporation                                       1,700       63,963
+ FPA Medical Management, Inc.                             2,100       39,113
+ FSI International, Inc.                                  2,500       29,375
  Fabri-Centers of America, Inc. (Class A)                 1,900       42,394
  Fair Isaac & Company, Inc.                               1,200       39,975
+ Fairchild Corporation (The) (Class A)                    1,500       37,313
+ Fairfield Communities, Inc.                              1,600       70,600
  Fedders Corporation                                      6,800       42,500
  Federal Mogul Corp.                                      3,300      133,650
  FelCor Suite Hotels, Inc.                                1,900       67,450
  Ferro Corporation                                        4,050       98,466
  Fidelity National Financial, Inc.                        4,840      150,645
+ Figgie International, Inc.                               4,400       57,750
+ FileNet Corporation                                      2,400       72,300
  Financial Security Assurance Holdings Ltd.               3,300      159,225
  Fingerhut Companies, Inc.                                4,800      102,600
+ First American Financial Corporation                     1,400      103,425
  First Brands Corporation                                 4,200      113,138
  First Citizens Bancshares, Inc.                            600       62,419
  First Commonwealth Financial Corp.                       3,000      105,188
  First Federal Savings Bank of Colorado                   2,900       68,875
  First Financial Bancorp Ohio                             1,490       71,893
  First Industrial Realty Trust, Inc.                      2,400       86,700
  First Midwest Bancorp, Inc.                              1,900       83,125
+ First Plus Financial Group Inc.                          2,200       84,425
  First Western Bancorp, Inc.                              2,400       68,400
  FirstBank Puerto Rico                                    2,200       74,938
  Firstbank of Illinois Co.                                2,400       88,350
  Fisher Scientific International, Inc.                    2,000       95,500
  Fleetwood Enterprises, Inc.                              2,800      118,825
  Fleming Companies, Inc.                                  3,800       51,063
  Florida Rock Industries, Inc.                            1,400       31,850
  Flowserve Corporation                                    4,132      115,438
+ Foodmaker, Inc.                                          5,600       84,350
+ Footstar, Inc.                                           3,400       91,375
+ Forcenergy Inc.                                          1,400       36,663
  Foremost Corporation of America                          1,000       69,750
  Forest Oil Corporation                                   3,000       49,500
  Fort Wayne National Corp.                                2,600      119,600
+ Forte Software, Inc.                                     2,200       16,775
  Franchise Finance Corporation of America                 4,500      121,500
+ Franklin Covey Co.                                       3,000       66,000
+ Fred Meyer, Inc.                                         1,890       68,749
+ Freeport-McMoRan Sulphur Inc.                              507        5,959
  Fremont General Corporation                              2,700      147,825
+ Friedman's, Inc. (Class A)                               1,700       23,163

                                      62
<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

  Merrill Lynch Small Cap Index Series (continued)
- ------------------------------------------------------------------------------
                                                          Shares       Value
  Issue                                                     Held     (Note 1a)
==============================================================================
  COMMON STOCKS
  (continued)

  Frontier Insurance Group, Inc.                           3,400     $ 77,775
  Fuller (H.B.) Company                                    1,500       74,250
  Fulton Financial Corporation                             3,000       97,500
  Fund American Enterprises Inc.                             600       72,600
+ Furniture Brands International, Inc.                     5,200      106,600
  Furon Company                                            2,000       41,750
  Fusion Systems Corporation
    (Contingent Value Rights) (b)                            600          413
  G & K Services, Inc. (Class A)                           2,200       92,400
+ GC Companies, Inc.                                       1,300       61,588
+ GT Interactive Software Corp.                            2,700       17,213
+ Gadzooks Inc. Company                                    1,000       21,000
+ Galey & Lord, Inc.                                       3,000       53,625
  Gallagher (Arthur J.) & Co.                              2,400       82,650
+ Galoob Lewis Toys, Inc.                                  3,600       36,675
+ Garden Ridge Corp.                                       2,000       28,500
+ Gaylord Container Corp.                                  6,200       35,650
+ GelTex Pharmaceuticals, Inc.                             1,500       39,750
  GenCorp, Inc.                                            2,200       55,000
  General Cable Corp.                                      1,600       57,900
  General Chemical Group, Inc. (The)                       1,700       45,475
+ Genesco Inc.                                             3,200       40,800
+ GenRad, Inc.                                             2,800       84,525
+ Gentex Corporation                                       3,800      102,125
  Geon Company (The)                                       3,300       77,137
  Georgia Gulf Corporation                                 3,700      113,313
+ Geotek Communications, Inc.                              5,300        8,116
  Gerber Scientific, Inc.                                  3,600       71,550
+ Getchell Gold Corp.                                      3,500       84,000
+ Gibson Greetings, Inc.                                   2,600       56,875
+ Gilead Sciences, Inc.                                    2,800      107,100
+ Glenayre Technologies, Inc.                              5,500       54,313
  Glimcher Realty Trust Inc.                               2,000       45,125
+ Global DirectMail Corp.                                  1,500       25,969
+ Global Industrial Techologies, Inc.                      2,800       47,425
+ Global Industries Ltd.                                   6,400      108,800
+ Golden Books Family Entertainment, Inc.                  2,000       20,625
+ Graham-Field Health Products, Inc.                       2,100       35,044
+ Grand Casinos, Inc.                                      5,000       68,125
  Great Atlantic & Pacific
    Tea Company, Inc. (The)                                1,800       53,438
  Great Financial Corp.                                    3,100      158,100
  Greif Brothers Corporation (Class A)                     2,100       70,350
+ Griffon Corporation                                      4,300       62,888
+ Grubb & Ellis Company                                    2,500       34,219
  Guaranty Life Company                                    2,000       57,000
+ Guilford Pharmaceuticals, Inc.                           1,700       34,213
+ Guitar Center Inc.                                       2,200       50,600
+ Gulf South Medical Supply, Inc.                          2,200       81,950
+ Gymboree Corp.                                           2,700       73,913
+ HA-LO Industries, Inc.                                   1,500       39,000
  HBO & Company                                            1,380       66,240
  HCC Insurance Holdings, Inc.                             3,000       63,750
+ HCIA Inc.                                                1,200       14,250
+ HEALTHSOUTH Corporation                                  4,132      114,663
+ HMT Technology Corporation                               3,900       50,700
  HNC Software Inc.                                        1,700       73,100
  HSB Group Inc.                                           1,800       99,338
  HUBCO, Inc.                                              1,957       76,568
+ Hadco Corporation                                        1,300       58,825
+ Haemonetics Corporation                                  2,700       37,800
+ Hambrecht & Quist Group                                  1,700       62,050
  Hancock Fabrics, Inc.                                    8,600      124,700
  Hancock Holding Co.                                        600       36,300
+ Handleman Company                                        4,300       29,831
  Hanna (M.A.) Company                                     4,400      111,100
+ Harbinger Corp.                                          2,100       59,063
+ Harken Energy Corporation                                6,900       48,300
+ Harland (John H.) Co. (The)                              3,300       69,300
  Harman International Industries, Inc.                    1,800       76,388
  Hartford Life, Inc. (Class A)                            2,200       99,688
+ Hartmarx Corporation                                     1,900       14,488
  Hawaiian Electric Industries, Inc.                       3,000      122,625
+ Hayes Lemmerz International Inc.                         3,400       95,200
  Health Care Property Investors, Inc.                     1,900       71,844
  Healthcare Realty Trust Inc.                             1,300       37,619
  Healthplan Services Corporation                          1,700       35,700
+ Heartport, Inc.                                          1,600       32,600
  Hecla Mining Company                                     8,000       39,500
  Heftel Broadcasting Corp. (Class A)                      2,200      102,850
  Heilig-Meyers Company                                    5,600       67,200
  Helix Technology Corporation                             2,600       50,700
  Henry (Jack) & Associates                                1,000       27,250
+ Henry Schein, Inc.                                         900       31,500
  Herbalife International, Inc. (Class A)                    367        7,700
+ Herbalife International, Inc. (Class B)                    733       15,767
  Hexcel Corporation                                       2,200       54,863
  Highlands Insurance Group, Inc.                          2,500       70,938
  Highwaymaster Communications, Inc.                       2,200       12,513
  Highwoods Properties, Inc.                               2,100       78,094
+ Hollywood Entertainment Corp.                            2,800       29,750
  Hologic, Inc.                                            1,500       31,031
+ Homebase, Inc.                                           3,500       27,563
+ Homeside, Inc.                                           2,300       63,394

                                      63
<PAGE>
 
  Horizon Group, Inc.                                      5,000       54,688
  Hospitality Properties Trust                             1,700       55,888
  Host Marriott Corporation                                4,100       60,988
  Houghton Mifflin Company                                 2,900      111,288
  Huffy Corporation                                        3,900       52,650
  Hughes Supply, Inc.                                      1,950       68,128
  Hugoton Energy Corp.                                     5,000       45,938
  Human Genome Sciences, Inc.                              2,200       87,450
  Huntington Bancshares Inc.                               3,222      115,992
  Hutchinson Technology, Inc.                              1,900       41,563
+ Hvide Marine, Inc. (Class A)                             1,400       36,050
+ Hyperion Software Corp.                                  2,300       82,225
+ I2 Technologies, Inc.                                      400       21,100
+ I-Stat Corporation                                       1,500       23,719
  ICN Pharmaceuticals, Inc.                                4,400      214,775
  ICOS Corporation                                         3,800       69,588
+ IDEC Pharmaceuticals Corporation                         1,700       58,438
  IDEX Corp.                                               3,100      108,113
+ IDEXX Laboratories, Inc.                                 4,100       65,344
  IES Industries, Inc.                                     3,100      114,119
+ IHOP Corp.                                               2,000       65,000
  IMC Global, Inc.                                         2,160       70,740
  IMC Global, Inc. (Warrants) (a)                            800        3,100
+ IMC Mortgage Company                                     2,600       30,875
+ IN Focus Systems, Inc.                                   1,400       42,525
  INMC Mortgage Holdings, Inc.                             3,100       72,656
+ INTERSOLV, Inc.                                          2,300       46,575
  IRT Property Company                                     7,100       83,869
+ IXC Communications, Inc.                                 1,600       50,200
+ Imation Corp.                                            4,200       67,200
  Imnet Systems, Inc.                                      1,100       17,875
  Imperial Bancorp                                         2,100      103,556
  Imperial Credit Industries, Inc.                         2,000       41,000
+ Imperial Holly Corporation                                 735        7,997
+ Inacom Corp.                                               800       22,450
  Incyte Pharmaceuticals, Inc.                             2,000       90,000
+ Industri-Matematik International Corp.                   2,800       82,600
+ Information Management Resources, Inc.                   1,200       45,000
+ Information Resources, Inc.                              3,100       41,463
+ Inhale Therapeutic Systems                               1,600       41,600
  Innovex, Inc.                                            1,500       34,406
+ Input/Output, Inc.                                       4,300      127,656
  Insignia Financial Group, Inc. (Class A)                 2,400       55,200
  Inso Corporation                                         1,400       16,188
+ Integrated Circuit Systems, Inc.                         1,800       51,300
+ Integrated Device Technology, Inc.                       7,700       72,669
  Integrated Health Services, Inc.                         4,119      128,461
+ Integrated Process Equipment Corp.                       1,600       25,200
+ Integrated Systems Inc.                                  1,700       23,375
  Inter-Tel Inc.                                           2,000       38,750
  InterDigital Communications Corp.                        5,100       15,619
  Interface, Inc. (Class A)                                2,100       60,900
  Intergraph Corporation                                   4,100       41,000
+ Interim Services, Inc.                                   7,200      186,300
  Intermedia Communications, Inc.                          1,400       85,050
  International Dairy Queen, Inc. (Class A)                2,100       56,241
  International Multifoods Corporation                     1,900       53,794
+ International Network Services                           2,500       57,813
+ International Rectifier Corporation                      5,400       63,788
  Interneuron Pharmaceuticals, Inc.                        2,800       26,600
  Interra Financial, Inc.                                  1,200       82,800
+ Interstate Hotels Company                                2,700       94,669
  Interstate Power Company                                 2,800      104,825
  Invacare Corporation                                     3,300       71,775
  Investors Financial Services Corporation                   700       32,200
  Ionics, Incorporated (Ordinary)                          2,000       78,250
  Irvine Apartment Communities, Inc.                       1,700       54,081
  Isis Pharmaceuticals, Inc.                               2,100       25,856
  Itron, Inc.                                              2,500       45,000
  J&L Specialty Steel, Inc.                                2,600       26,163
+ JDA Software Group, Inc.                                 1,100       38,500
  JLG Industries, Inc.                                     4,400       62,150
  JP Foodservice, Inc.                                     5,842      215,789
+ Jabil Circuit, Inc.                                        600       23,850
+ Jacobs Engineering Group, Inc.                           2,100       53,288
+ Jacor Communications, Inc.                               3,200      170,000
  Jefferies Group, Inc.                                    2,000       81,875
  John Alden Financial Corporation                         2,400       57,600
  Jones Medical Industries, Inc.                           2,000       76,500
  Jostens, Inc.                                            3,800       87,638
+ Journal Register Company                                 5,200      109,200
  Juno Lighting, Inc.                                      3,100       54,250
  Just For Feet, Inc.                                      3,000       39,375
  K2, Inc.                                                 2,600       59,150
  KCS Energy, Inc.                                         2,400       49,800
  Kaman Corporation (Class A)                              4,500       73,688
  Kaufman and Broad Home Corporation                       3,900       87,506
  Kaydon Corporation                                       3,600      117,450
  Kellwood Company                                         2,500       75,000
  Kelly Services, Inc.                                     1,700       51,000
  Kemet Corporation                                        4,700       91,063
  Kennametal Inc.                                          2,600      134,713
  Kent Electronics Corporation                             4,300      108,038
  Keystone Financial, Inc.                                 6,000      241,500

                                      64
<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

  Merrill Lynch Small Cap Index Series (continued)
- ------------------------------------------------------------------------------
                                                          Shares       Value
  Issue                                                     Held     (Note 1a)
==============================================================================
  COMMON STOCKS
  (continued)

  Kilroy Realty Corporation                                1,700     $ 48,875
  Kimball International, Inc.                              4,600       84,813
  Kimberly-Clark Corp.                                     1,134       55,920
+ Kirby Corporation                                        3,600       69,525
+ Knoll, Inc.                                              1,200       38,550
  Koger Equity Inc.                                        2,000       43,875
  Kuhlman Corporation                                      2,100       82,163
  Kulicke and Soffa Industries, Inc.                       2,400       44,700
+ LCA-Vision Inc. (New Shares)                             1,543        1,736
+ LHS Group Inc.                                           1,000       59,750
  LNR Property Corp.                                       2,500       59,062
  LTC Properties, Inc.                                     7,100      147,325
  Laboratory Corp. of America Holdings                     6,600       11,138
+ Lamar Advertising Co.                                    1,500       59,625
  Landry's Seafood Restaurants, Inc.                       3,000       72,000
  Lands' End, Inc.                                         1,700       59,606
  Landstar System, Inc.                                    2,200       58,025
+ Learning Company, Inc. (The)                             3,500       56,219
+ Learning Tree International Inc.                         1,100       31,763
  Legato Systems, Inc.                                     1,800       79,200
  Legg Mason, Inc.                                         4,066      227,442
  Lennar Corporation                                       2,500       53,906
  Level One Communications, Inc.                           2,150       60,738
  Libbey, Inc.                                             2,100       79,538
  Liberty Property Trust                                   2,200       62,837
  Life Re Corp.                                            1,000       65,187
  Life Technologies, Inc.                                  1,100       36,575
+ Ligand Pharmaceuticals                                   2,900       37,337
  Lilly Industries, Inc. (Class A)                         4,300       88,687
  Lincoln Electric Company                                 2,800      100,800
  Lindsay Manufacturing Co.                                1,500       65,062
+ Linens `N Things                                         1,500       65,437
  Liposome Company, Inc.                                   3,000       13,875
+ Littelfuse, Inc.                                         3,000       74,625
+ Lo-jack Corp.                                            2,300       33,925
  Lomak Petroleum, Inc.                                    2,300       37,375
+ Lone Star Industries, Inc.                               1,700       90,312
+ Lone Star Steakhouse & Saloon, Inc.                      3,400       59,500
+ Lone Star Technologies, Inc.                             2,100       59,587
  Long Island Bancorp, Inc.                                2,500      124,062
  Longs Drug Stores Corp.                                  3,100       99,587
  Longview Fibre Company                                   5,200       78,975
  Luby's Cafeterias, Inc.                                  3,300       57,956
  Lukens Inc.                                              1,500       42,844
+ Lycos Inc.                                               1,400       57,925
+ Lydall, Inc.                                             3,100       60,450
  MAF Bancorp, Inc.                                        2,050       72,519
+ MAXXAM Group, Inc.                                         500       21,812
  MDU Resources Group, Inc.                                3,600      113,850
  MMI Companies Inc.                                       1,600       40,200
+ MRV Communications Inc.                                  2,000       47,750
  Mac Frugals Bargains Close-Outs, Inc.                    2,700      111,037
+ MacDermid, Inc.                                            700       59,412
  Macerich Company (The)                                   1,900       54,150
+ Macromedia Inc.                                          3,100       25,769
  Madison Gas & Electric Company                           3,000       69,000
  Magellan Health Services, Inc.                           2,900       62,350
  Magna Group, Inc.                                        4,100      187,575
  Magnetek, Inc.                                           2,400       46,800
+ Mail-Well Holdings Inc.                                  1,500       60,750
  Manitowoc Company, Inc. (The)                            1,750       56,875
  Manufactured Home Communities, Inc.                      1,600       43,200
+ Manugistics Group, Inc.                                  1,700       75,862
  Marcus Corporation (The)                                 5,250       96,797
  Marine Drilling Companies, Inc.                          5,100      105,825
+ Mariner Health Group, Inc.                               3,200       52,000
+ Marquette Medical Systems, Inc.                          2,000       53,250
+ Marshall Industries                                      2,700       81,000
+ Martek Biosciences Corporation                           1,200        9,900
  Mascotech, Inc.                                          2,700       49,612
  Mastec, Inc.                                               800       18,300
  Material Sciences Corporation                            2,500       30,469
  Matthews International Corporation                       1,900       83,600
+ Maverick Tube Corp.                                        900       22,781
+ Maxicare Health Plans, Inc.                              2,200       23,925
  McClatchy Newspapers, Inc. (Class A)                     2,400       65,250
  McDonald's & Company Investments                         2,400       68,100
+ McLeodUSA Inc.                                           4,300      137,600
+ Medaphis Corp.                                           6,400       41,600
  Medical Assurance, Inc.                                  2,200       61,875
+ Medicis Pharmaceutical Corp.                             1,300       66,462
  Medimmune, Inc.                                          2,600      111,475
+ MedPartners, Inc.                                        1,062       23,762
  Medusa Corporation                                       2,100       87,806
  Men's Wearhouse, Inc. (The)                              1,900       66,025
  Mentor Corporation                                       2,800      102,200
+ Mentor Graphics Corporation                              6,000       58,125
+ Mercury Interactive Corp.                                1,800       48,150
  Merrill Corporation                                      1,400       32,550
  Methode Electronics, Inc. (Class A)                      4,100       66,625
+ Metromail Corporation                                    1,600       28,600
  Metromedia International Group, Inc.                     3,900       37,050
+ Michaels Stores, Inc.                                    2,200       64,350
+ Micrel Inc.                                              1,300       36,400

                                      65
<PAGE>
 
+ Micro Warehouse Inc.                                     3,300       45,994
+ Microage Inc.                                            1,900       28,619
  Micros Systems, Inc.                                     1,100       49,500
  Microtouch Systems Inc.                                  1,100       17,325
  Mid Am, Inc.                                             3,970      102,227
  Mid-America Apartment Communities, Inc.                    900       25,706
  Mid Atlantic Medical Services, Inc.                      4,300       54,825
+ Midwest Express Holdings Inc.                            1,400       54,337
+ Millennium Pharmaceuticals Inc.                          2,900       55,100
+ Miller Industries Inc.                                   3,400       36,550
  Mills Corp.                                              1,500       36,750
  Minerals Technologies, Inc.                              2,500      113,594
  Minnesota Power & Light Company                          3,300      143,756
+ Miravant Medical Technologies                              600       24,000
  Mississippi Chemical Corporation                         4,200       76,650
  Mobile Telecommunication Technologies Corp.              4,500       99,000
  Modine Manufacturing Company                             2,500       85,312
+ Mohawk Industries, Inc.                                  3,750       82,266
+ Moneygram Payment Systems Inc.                           2,000       21,500
  Morgan Keegan, Inc.                                      4,050      102,516
+ Motivepower Industries Inc.                              2,100       48,825
+ Mueller Industries, Inc.                                 2,000      118,000
+ Mycogen Corp.                                            2,800       52,500
+ Myriad Genetics, Inc.                                    1,100       26,675
+ NABI, Inc.                                               3,100       10,559
  NACCO Industries, Inc. (Class A)                           700       75,031
  NAC Re Corp.                                             1,500       73,219
+ NBTY, Inc.                                               2,400       80,100
+ NCS Healthcare, Inc. (Class A)                           2,100       55,387
+ NFO Worldwide, Inc.                                      2,600       54,437
+ NL Industries, Inc. (New Shares)                         2,500       34,062
+ NTL Inc.                                                 2,900       80,837
  Nash-Finch Company                                       3,900       74,100
  National Computer System, Inc.                           1,900       66,975
+ National Instruments Corp.                               1,800       52,200
+ National Media Corp.                                     2,000        6,500
+ National Oil Well Inc.                                   4,000      136,750
+ National Semiconductor Corporation                       1,567       40,644
+ National Steel Corp.                                     2,000       23,125
+ National Surgery Centers, Inc.                           1,700       44,625
  Nationwide Health Properties, Inc.                       3,700       94,350
+ Natural Microsystems Corp.                               1,200       55,800
  Natures Sunshine Products, Inc.                          2,100       54,600
+ Nautica Enterprises, Inc.                                3,800       88,350
+ NeoPath, Inc.                                            1,400       18,200
+ Neoprobe Corp.                                           2,400       14,400
+ Network Appliance, Inc.                                  3,000      106,500
+ Network Equipment Technologies, Inc.                     3,100       45,337
+ Networks Associates, Inc.                                2,083      109,748
+ Neurex Corporation                                       1,900       26,362
+ Neurogen Corporation                                     1,300       17,550
+ Neuromedical Systems, Inc.                               5,000       14,062
  Nevada Power Company                                     4,900      130,156
  New England Business Service, Inc.                       2,100       70,875
  New York Bancorp Inc.                                    1,666       66,119
  Newfield Exploration Co.                                 4,100       95,581
+ Newpark Resources, Inc.                                  6,200      108,500
  Newport News Shipbuilding Inc.                           4,000      101,750
  News Corporation Limited (The) (ADR)*                    4,285       85,164
+ Nexstar Pharmaceuticals, Inc.                            2,600       29,575
  Nordson Corporation                                      1,600       72,400
  Norrell Corp.                                            1,700       33,787
+ North Face Inc.                                          1,500       33,000
  Northrop Grumman Corporation                               677       77,855
  Northwestern Public Service Company                      4,200       96,600
  Nova Corporation                                         2,200       55,000
+ NovaCare, Inc.                                           6,100       79,681
+ Nu Skin Asia Pacific Inc. (Class A)                      1,600       29,200
+ Nuevo Energy Co.                                         1,900       77,425
  OEA, Inc.                                                1,900       54,981
  O M Group Inc.                                           3,600      131,850
+ OMI Corp.                                                5,300       48,694
  ONBANCorp Inc.                                           2,100      148,050
  ONEOK, Inc.                                              2,700      109,012
+ Oak Industries, Inc.                                     3,200       95,000
+ Oak Technology, Inc.                                     3,800       24,700
  Oakwood Homes Corporation                                5,000      165,937
  Oasis Residential, Inc.                                  8,000      178,500
+ Object Design Inc.                                       2,400       20,100
+ Ocean Energy, Inc.                                       1,200       59,175
+ Oceaneering International, Inc.                          3,100       61,225
  Ocwen Asset Investment Corp.                             1,200       24,600
+ Ocwen Financial Corporation                              2,800       71,225
+ Offshore Logistics, Inc.                                 3,600       76,950
  Ogden Corporation                                        4,600      129,662
  Old National Bancorp                                     2,700      130,612
  Omega Healthcare Investors, Inc.                         1,600       61,800
  Omnipoint Corporation                                    2,600       60,450
  Omniquip International Inc.                              1,900       37,881
  One Valley Bancorp, Inc.                                 2,450       94,937
+ Orbital Sciences Corp.                                   3,800      113,050
+ Oregon Metallurgical Corporation                         1,700       56,737
  Oregon Steel Mills, Inc.                                 2,900       61,806
+ Organogenesis, Inc.                                      2,593       68,390

                                      66
<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

  Merrill Lynch Small Cap Index Series (continued)
- ------------------------------------------------------------------------------
                                                          Shares       Value
  Issue                                                     Held     (Note 1a)
==============================================================================
  COMMON STOCKS
  (continued)

  Oriental Financial Group Inc.                            1,425     $ 42,127
  Orion Capital Corporation                                4,100      190,394
+ Orthodontic Center                                       4,800       79,800
  Otter Tail Power Company                                 1,700       64,387
+ Outdoor Systems, Inc.                                    2,100       80,587
  Overseas Shipholding Group, Inc.                         3,600       78,525
  Owens & Minor, Inc.                                      4,700       68,150
+ Oxigene Inc.                                               700       12,425
+ P-COM, Inc.                                              4,400       75,900
+ PFF Bancorp, Inc.                                        2,100       41,737
  P.H. Glatfelter Company                                  2,400       44,700
+ PHP Healthcare Corp.                                     1,000       15,062
+ PMC-Sierra, Inc.                                         4,100      127,100
+ PMT Services, Inc.                                       4,200       58,275
+ PRI Automation, Inc.                                     1,200       34,650
+ PSINet, Inc.                                             2,800       14,350
+ Pacific Gateway Exchange Inc.                            1,400       75,337
+ Pacific Sunwear of California                            1,500       44,344
+ PageMart Wireless, Inc. (Class A)                        2,900       22,837
+ Paging Network, Inc.                                     9,200       98,900
+ Palm Harbor Homes, Inc.                                  1,325       37,431
+ Panavision Inc.                                          2,500       64,531
+ Papa John's International, Inc.                          2,100       73,237
+ Paragon Health Network, Inc.                             3,048       59,626
+ Paragon Trade Brands, Inc.                               2,100       27,037
+ Parexel International Corporation                        2,100       77,700
  Park Electrochemical Corporation                         2,100       59,587
+ Parker Drilling Company                                  6,800       82,875
+ PathoGenesis Corp.                                       1,600       59,400
  Patriot American Hospitality, Inc.                       2,399       69,121
+ Patterson Dental Co.                                     2,000       90,500
+ Patterson Energy, Inc.                                   1,200       46,425
+ Paxar Corporation                                        4,625       68,508
+ Pediatrix Medical Group Inc.                             1,800       76,950
  Penncorp Financial Group, Inc.                           2,600       92,787
  Peoples Heritage Financial Group, Inc.                   2,500      115,000
+ Perceptron, Inc.                                           900       19,462
+ Periphonics Corporation                                  1,900       16,625
+ Perrigo Co.                                              6,400       85,600
+ Personnel Group of America, Inc.                         1,500       49,500
+ Petco Animal Supplies, Inc.                              2,100       50,400
+ Pharmaceutical Product Development, Inc.                 2,100       32,287
+ PharMerica, Inc.                                         2,000       20,750
+ Philip Services Corp.                                    4,004       57,557
  Phillips-Van Heusen Corp.                                4,200       59,850
  Phoenix Duff & Phelps Corp.                              6,300       50,400
  Phoenix Technologies Ltd.                                2,200       26,675
  Photronics, Inc.                                         1,800       43,650
+ Physician Sales & Service                                3,600       77,400
+ Physicians Resource Group, Inc.                          3,400       14,875
+ Physio-Control International Corp.                       2,100       33,337
+ Picturetel Corp.                                         4,500       29,250
  Piedmont Natural Gas Company, Inc.                       3,500      125,781
  Pier 1 Imports, Inc.                                     7,700      174,212
  Pioneer Group, Inc.                                      2,300       64,687
  Pioneer Natural Resources Company                          742       21,472
  Pioneer Standard Electronics                             3,900       59,475
  Piper Jaffray Companies, Inc.                            2,300       83,806
  Pittston Minerals Group                                  3,100       81,375
+ Plantronics, Inc.                                        1,600       64,000
+ Platinum Technology, Inc.                                6,100      172,325
+ Playboy Enterprises, Inc. (Class B)                      2,600       40,787
+ Playtex Products, Inc.                                   3,300       33,825
+ Plexus Corporation                                       2,200       32,725
  Polaris Industries, Inc.                                 2,600       79,462
+ Policy Management Systems Corporation                    1,600      111,300
+ Polymer Group, Inc.                                      3,700       35,150
+ Pool Energy Services Co.                                 2,400       53,400
  Post Properties, Inc.                                      615       24,984
+ Powertel, Inc.                                           1,300       21,775
+ Premier Parks Inc.                                       1,200       48,600
+ Premiere Technologies, Inc.                              2,100       58,012
+ Premisys Communications, Inc.                            2,400       62,700
+ Prepaid Legal Services, Inc.                             2,400       82,050
  Presidential Life Corporation                            1,800       36,450
  Price Enterprises, Inc.                                  8,000      146,000
+ PriceSmart, Inc.                                           275        4,709
+ Pride Petroleum Services, Inc.                           4,400      111,100
+ Primark Corp.                                            4,000      162,750
+ Prime Hospitality Corp.                                  4,700       95,762
+ Proffitt Systems, Inc.                                   5,400      153,562
+ Progress Software Corporation                            2,200       47,575
+ Protein Design Labs, Inc.                                1,900       76,000
  Provident Bankshares Corp.                               1,130       72,179
+ Proxim, Inc.                                             1,200       13,575
  Public Service Company of New Mexico                     5,400      127,912
  Pulitzer Publishing Company                              1,300       81,656
  Pulte Corp.                                                700       29,269
  Quaker State Corporation                                 4,000       57,000
+ Quality Food Centers, Inc.                               1,500      100,500
  Quanex Corporation                                       2,000       56,250
  Queens County Bancorp, Inc.                              1,500       60,750
+ Quest Diagnostics Incorporated                           3,100       52,312

                                      67
<PAGE>
 
  Quick & Reilly Group, Inc.                               1,800       77,400
+ Quick Response Services, Inc.                            1,000       37,000
+ RCN Corporation                                          1,200       41,100
+ REMEC, Inc.                                              1,400       31,500
  RFS Hotel Investors, Inc.                                2,200       43,862
+ RMI Titanium Co.                                         1,500       30,000
+ RadiSys Corporation                                        800       29,800
+ Rainforest Cafe, Inc.                                    1,500       49,500
+ Ralcorp Holdings Inc.                                    3,500       59,281
+ Rambus Inc.                                              1,300       59,475
+ Rational Software Corporation                            7,500       85,312
  Raymond James Financial, Inc.                            3,400      134,937
+ Read-Rite Corp.                                          4,700       74,025
  Realty Income, Corp.                                     2,300       58,506
+ Reckson Associates Realty Corp.                          2,000       50,750
+ Red Roof Inns, Inc.                                      4,000       61,250
  Redwood Trust, Inc.                                      1,000       20,375
  Regal-Beloit Corp.                                       2,500       73,906
  Regency Realty Corp.                                     1,300       35,994
+ Regeneron Pharmaceuticals, Inc.                          2,100       17,981
  Regis Corporation                                        1,900       47,737
+ Registry Resources, Inc.                                   900       41,287
  Reinsurance Group of America                             2,800      119,175
  Reliance Steel & Aluminum Co.                            1,450       43,137
  ReliaStar Financial Corporation                          1,326       54,615
+ Remedy Corp.                                             2,100       44,100
+ Renal Care Group, Inc.                                   3,200      102,400
+ Renal Treatment Centers, Inc.                            3,200      115,600
+ Renters Choice, Inc.                                     1,800       36,900
+ Respironics, Inc.                                        2,500       55,937
+ Rexall Sundown, Inc.                                     3,000       90,562
  Richfood Holdings Inc. (Class A)                         5,000      141,250
  Riggs National Corporation                               7,000      188,125
+ Rio Hotel & Casino, Inc.                                 2,200       46,200
+ Risk Capital Holdings, Inc.                              2,300       51,175
+ Robert Mondavi (Class A)                                   900       43,875
+ Roberts Pharmaceutical Corporation                       4,300       41,119
+ Robotic Visions Systems, Inc.                            2,100       24,150
  Rochester Gas and Electric Corporation                   3,900      132,600
  Rock-Tenn Co. (Class A)                                  3,700       75,850
  Rollins, Inc.                                            2,700       54,844
  Rollins Truck Leasing Corp.                              5,400       96,525
+ Romac International, Inc.                                2,000       48,875
  Roper Industries Inc.                                    3,300       93,225
  Roslyn Bancorp, Inc.                                     4,500      104,625
+ Ruby Tuesday, Inc.                                       2,600       66,950
+ Rural/Metro Corp.                                        2,000       66,750
+ Ryan's Family Steak House, Inc.                          8,100       69,356
  Ryland Group, Inc. (The)                                 3,700       87,412
+ S3 Inc.                                                  6,100       30,500
  S&T Bancorp Inc.                                         1,700       73,525
  SCPIE Holdings Inc.                                      1,600       46,300
+ SEACOR SMIT, Inc.                                        1,500       90,375
  SEI Corporation                                          1,900       79,800
  SEMCO Energy, Inc.                                       3,055       55,372
+ SFX Broadcasting, Inc. (Class A)                         1,100       88,275
+ SMART Modular Technologies, Inc.                         3,400       78,200
+ SPS Technologies, Inc.                                   1,700       74,162
  SPX Corp.                                                1,700      117,300
+ Sabratek Corporation                                     1,000       28,750
+ Sabre Group Holdings Inc.                                2,700       77,962
+ Safeguard Scientifics, Inc.                              2,700       84,712
+ Safeskin Corp.                                           1,800      102,150
  Safety-Kleen Corp.                                       5,200      142,675
+ Samsonite Corp.                                          1,800       56,925
+ SanDisk Corporation                                      2,600       52,812
+ SangStat Medical Corp.                                   1,600       64,800
+ Sanmina Corp.                                            1,700      115,175
  Saul Centers, Inc.                                       7,500      136,406
+ Sawtek Inc.                                                800       21,100
+ Scholastic Corp.                                         1,200       45,000
  Schulman (A.), Inc.                                      3,900       97,987
  Schweitzer-Mauduit International, Inc.                   2,700      100,575
+ Scientific Games Holdings Corp.                          1,100       22,275
+ Scios Inc.                                               4,400       44,000
+ Scopus Technology, Inc.                                  2,100       25,200
  Scotsman Industries, Inc.                                2,300       56,206
+ Scotts Co. (The)                                         3,300       99,825
+ Seitel, Inc.                                             2,600       44,525
  Selective Insurance Group, Inc.                          3,400       91,800
+ Sepracor, Inc.                                           2,800      112,175
+ Sequa Corporation (Class A)                                700       45,544
+ Sequent Computer Systems, Inc.                           3,900       78,000
+ Sequus Pharmaceuticals, Inc.                             5,500       40,906
+ Serologicals Corporation                                 1,800       46,800
+ Service Merchandise Company, Inc.                        8,200       17,425
+ Shiva Corporation                                        2,600       22,262
+ Shoney's, Inc.                                           4,500       14,344
+ ShopKo Stores, Inc.                                      2,200       47,850
+ Showbiz Pizza Time, Inc.                                 2,900       66,700
  Showboat, Inc.                                           2,500       73,437
+ Siebel Systems, Inc.                                     2,100       87,806
+ Sierra Health Services, Inc.                             2,200       73,975
  Sierra Pacific Resources                                 3,900      146,250
  Sigcorp, Inc.                                            3,200       94,000

                                      68
<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

  Merrill Lynch Small Cap Index Series (continued)
- ------------------------------------------------------------------------------
                                                          Shares       Value
  Issue                                                     Held     (Note 1a)
==============================================================================
  COMMON STOCKS
  (continued)

  Silgan Holdings, Inc.                                    2,000     $ 65,000
+ Silicon Valley Bancshares                                1,000       56,250
+ Silicon Valley Group, Inc.                               2,900       65,612
+ Siliconix Inc.                                           1,300       55,900
+ Sinclair Broadcast Group, Inc. (Class A)                 1,000       46,625
+ Sitel Corporation                                        4,700       42,887
  Smith (A.O.) Corp.                                       1,800       76,050
  Smith (Charles E) Residential Realty, Inc.               1,900       67,450
+ Smithfield Foods, Inc.                                   2,700       89,100
  Smucker J.M. Company (The) (Class A)                     3,100       73,237
+ Snyder Communications, Inc.                              1,900       69,350
  Snyder Oil Corp.                                         5,900      107,675
+ Sola International, Inc.                                 2,900       94,250
+ Sonic Corp.                                              1,600       45,000
  Sothebys Holdings, Inc.                                  4,400       81,400
+ Source Services Corporation                              2,400       51,900
  Southdown, Inc.                                          2,000      118,000
  Southwestern Energy Company                              5,600       72,100
  Sovereign Bancorp, Inc.                                 10,100      209,575
+ Spacelabs Medical, Inc.                                  2,400       45,600
+ Spectrian Corporation                                    1,000       19,250
+ SpeedFam International, Inc.                             1,600       42,400
+ Spine-Tech, Inc.                                         1,000       51,437
+ Splash Technology Holdings, Inc.                         1,400       31,500
+ Sports Authority, Inc. (The)                             3,900       57,525
  Springs Industries, Inc. (Class A)                       1,400       72,800
  St. John Knits, Inc.                                     2,400       96,000
  St. Mary Land & Exploration Company                      1,900       66,500
  St. Paul Bancorp Inc.                                    3,200       84,000
+ StaffMark, Inc.                                          1,700       53,762
+ Stage Stores, Inc.                                       2,400       89,700
  Standard Pacific Corp.                                   2,000       31,500
  Standard Products Company (The)                          2,200       56,375
+ Stanford Telecommunications, Inc.                        1,100       18,631
  Stanhome, Inc.                                           2,000       51,375
+ Steel Dynamics, Inc.                                     2,800       44,800
  Stewart & Stevenson Services, Inc.                       3,100       79,050
+ Stillwater Mining Co.                                    2,200       36,850
  Stone & Webster, Inc.                                      800       37,500
  Storage Realty Trust Inc.                                4,000      105,250
  Storage USA, Inc.                                        2,600      103,837
+ Stratus Computer, Inc.                                   2,700      102,094
  Stride Rite Corp. (The)                                  5,900       70,800
+ Structural Dynamics Research Corp.                       3,300       74,250
  Sturm, Ruger & Company, Inc.                             2,800       51,625
+ Suiza Foods Corp.                                        1,400       83,387
  Summit Bancorp.                                          1,476       78,597
  Summit Properties, Inc.                                  1,600       33,800
+ Summit Technology, Inc.                                  5,400       24,469
+ Sun Healthcare Group, Inc.                               4,300       83,312
+ Sunburst Hospitality Corp.                               1,600       15,800
+ Sunglass Hut International, Inc.                         4,200       26,512
+ Sunrise Assisted Living, Inc.                              800       34,500
+ Sunrise Medical, Inc.                                    2,000       30,875
  Superior Industries International, Inc.                  2,600       69,712
+ Superior Services, Inc.                                  2,300       66,412
  Susquenhanna Bancshares, Inc.                            2,600       99,450
+ Swift Energy Company                                     1,870       39,387
+ Swift Transportation Co., Inc.                           1,900       61,512
+ Sykes Enterprises, Inc.                                  1,200       23,400
+ Sylvan Learning Systems, Inc.                            1,900       74,100
+ Symantec Corp.                                           6,100      133,819
+ Synetic, Inc.                                            1,900       69,350
+ Synopsys, Inc.                                           1,369       48,942
+ System Software Associates, Inc.                         4,300       37,625
+ Systems & Computer Technology Corp.                      1,700       84,362
+ TBC Corporation                                          4,500       43,031
  TCA Cable TV, Inc.                                       1,400       64,400
+ TCI Satellite Entertainment, Inc. (Class A)              4,800       33,000
  TETRA Tech, Inc.                                         2,750       55,000
  TETRA Technologies, Inc.                                 2,000       42,125
  TJ International, Inc.                                   2,900       70,687
  TNP Enterprises, Inc.                                    3,000       99,750
  TR Financial Corporation                                 2,100       69,825
  Talbots, Inc.                                            1,300       23,562
  Technitrol, Inc.                                         1,700       51,000
+ Technology Solutions Co.                                 1,950       51,431
  Tejas Gas Corp.                                          1,800      110,250
+ Tekelec                                                    800       24,400
  Tel-Save Holdings                                        4,400       87,450
  Telxon Corporation                                       2,300       54,912
  Tennant Co.                                              1,700       61,837
  Terra Industries, Inc.                                   4,000       52,250
  Tesoro Petroleum Corporation                             3,800       58,900
  Texaco Inc.                                              2,846      154,751
  Texas Industries, Inc.                                   2,200       99,000
  Texas Regional Bancshares, Inc. (Class A)                1,550       47,275
+ Theragenics Corporation                                  1,100       39,600
  TheraTech, Inc.                                          5,200       41,600
+ Thermo Cardiosystems Inc.                                1,800       48,150
+ ThermoLase Corporation                                   1,500       15,750
  Thomas Industries, Inc.                                  3,600       71,100
  Thornburg Mortgage Asset Corp.                           1,400       23,100
+ Timberland Company (Class A)                               600       34,837

                                      69
<PAGE>
 
+ Titan Exploration, Inc.                                  3,100       29,450
+ Titanium Metals Corporation                              1,800       51,975
+ Toll Brothers, Inc.                                      3,300       88,275
+ Tom Brown, Inc.                                          3,000       57,750
  Toro Company (The)                                       1,900       80,987
+ Total Renal Care Holdings, Inc.                          4,000      110,000
+ Tower Automotive, Inc.                                   1,600       67,300
+ Toy Biz, Inc.                                            1,500       11,625
+ Tracor, Inc.                                             2,000       60,750
  Trans Financial, Inc.                                    2,100       81,637
+ Trans World Airlines, Inc.                               5,200       52,650
+ Transition Systems, Inc.                                 2,200       48,675
+ Transkaryotic Therapies, Inc.                            2,000       70,250
+ TransMontaigne Oil Company                               2,900       43,500
  Trenwick Group, Inc.                                     1,450       54,556
+ Triad Guaranty, Inc.                                     1,600       46,400
+ Triangle Pacific                                         2,500       84,687
+ Triangle Pharmaceuticals, Inc.                           1,100       16,087
+ Triarc Companies, Inc. (Class A)                         3,300       89,925
+ Trico Marine Services, Inc.                              1,700       49,937
+ Trigon Healthcare, Inc.                                  4,400      114,950
+ Trimble Navigation Ltd.                                  2,800       61,075
  Trinet Corporate Realty Trust, Inc.                      1,100       42,556
+ TriQuint Semiconductor, Inc.                               900       18,225
+ Triumph Group, Inc.                                      1,500       49,875
  True North Communications, Inc.                          3,100       76,725
+ Trump Hotels & Casino Resorts, Inc.                      2,700       18,056
  Trust Company of New Jersey (The)                        2,900       72,500
  TrustCo Bank Corp. N.Y.                                  3,680      100,280
  Trustmark Corporation                                    3,100      143,375
+ Tuboscope Vetco International Corp.                      5,700      137,156
+ Tucson Electric Power Co.                                3,600       65,250
+ Twinlab Corporation                                      2,100       51,975
  UGI Corp. (New Shares)                                   3,400       99,662
  UMB Financial Corp.                                      1,365       74,392
  USBancorp, Inc.                                            800       58,400
+ USCS International, Inc.                                 2,200       37,400
  US Freightways Corp.                                     3,000       97,500
  UST Corporation                                          2,600       72,150
+ U.S. Bioscience Inc.                                     2,600       23,562
+ U.S. Home Corporation                                    1,600       62,800
+ U.S. Office Products Co.                                10,650      209,006
  U.S. Trust Corporation                                   3,700      231,712
+ Ultratech Stepper, Inc.                                  1,900       37,762
  Unifirst Corp.                                           2,700       75,769
  Union Planters Corporation                                 723       49,119
+ Uniphase Corp.                                           3,400      140,675
+ United Auto Group, Inc.                                  2,800       50,750
  United Bankshares, Inc.                                  1,700       81,175
  United Companies Financial Corporation                   2,200       34,100
  United Illuminating Company (The)                        2,600      119,437
+ United International Holdings Inc. (Class A)             3,700       42,550
  United States Satellite Broadcasting
    Company, Inc.                                          3,600       28,575
+ United Stationers, Inc.                                  1,000       48,125
+ United Video Satellite Group, Inc. (Class A)             1,300       37,375
+ Unitrode Corporation                                     3,000       64,500
  Universal Foods Corporation                              2,600      109,850
  Universal Outdoor, Inc.                                  1,800       93,600
  Urban Shopping Centers, Inc.                             1,100       38,362
+ VWR Scientific Products Corporation                      1,700       48,025
+ Vail Resorts, Inc.                                       3,100       80,406
+ Valence Technology, Inc.                                 5,000       25,312
  Valmont Industries, Inc.                                 3,800       74,100
+ Vanguard Cellular Systems, Inc. (Class A)                2,600       33,150
+ Vanstar Corporation                                      5,400       61,087
+ Vantive Corporation                                      1,700       42,925
+ Varco International, Inc.                                3,400       72,887
  Veeco Instruments Inc.                                     800       17,600
+ Veritas DGC Inc.                                         2,200       86,900
+ Veritas Software Corp.                                   2,250      114,750
+ Veritex Pharmaceuticals, Inc.                            3,200      105,600
  Vesta Insurance Group, Inc.                              1,400       83,125
+ Veterinary Centers of America, Inc.                      2,100       28,219
+ Viasoft, Inc.                                            1,900       80,275
+ Vical, Inc.                                              1,800       21,600
+ Vicor Corporation                                        3,900      105,787
+ Videoserver, Inc.                                        1,600       25,400
  Vintage Petroleum, Inc.                                  3,400       64,600
+ Visio Corp.                                              2,500       95,937
+ Vitalink Pharmacy Services, Inc.                         1,500       36,187
+ Vivus, Inc.                                              3,200       34,000
+ Volt Information Sciences, Inc.                            900       48,487
  WD-40 Company                                            2,500       72,500
+ WMS Industries, Inc.                                     2,400       50,700
  WPL Holdings, Inc.                                       3,300      109,312
  WPS Resources Corporation                                2,800       94,675
  Wabash National Corporation                              3,000       85,312
  Wachovia Corporation                                       875       70,984
  Wackenhut Corporation (Class A)                          1,300       30,144
+ Wackenhut Corrections Corporation                        1,200       32,250
  Walden Residential Properties, Inc.                      6,700      170,850
+ Wall Data Inc.                                           2,300       31,337
+ Walter Industries, Inc.                                  2,900       59,812

                                      70
<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

  Merrill Lynch Small Cap Index Series (continued)
- ------------------------------------------------------------------------------
                                                          Shares       Value
  Issue                                                     Held     (Note 1a)
==============================================================================
  COMMON STOCKS
  (continued)

+ Wang Laboratories, Inc.                                  3,800     $ 84,075
  Warnaco Group, Inc. (The) (Class A)                      1,069       33,546
  Washington Gas Light Company                             4,500      139,219
  Washington Real Estate Investment Trust                  2,700       45,225
  Washington Water Power Company (The)                     5,600      136,150
+ Waters Corp.                                             2,800      105,350
  Watsco, Inc.                                             1,800       44,437
  Watts Industries Inc. (Class A)                          2,400       67,950
  Wausau-Mosinee Paper Corporation                         3,200       64,400
  Webb (Del E.) Corporation                                1,600       41,600
  Webster Financial Corporation                            1,400       93,100
  Weeks Corp.                                              2,300       73,600
  Wellman, Inc.                                            2,800       54,600
  Werner Enterprises, Inc.                                 3,200       65,600
  Wesbanco, Inc.                                           2,200       66,000
  West America Bancorp.                                    1,400      143,150
+ West Marine, Inc.                                        1,200       26,850
+ Westell Technologies, Inc. (Class A)                     1,500       19,125
  Western Investment Real Estate Trust                     7,200       99,000
+ Western Wireless Corporation                             8,700      151,162
  Westinghouse Air Brake Company                           2,100       53,812
+ Westwood One, Inc.                                       2,900      107,662
+ Wet Seal, Inc. (The) (Class A)                           1,200       35,400
  Whitney Holding Corp.                                    2,200      125,400
+ Whittman-Hart, Inc.                                        800       27,400
+ Whole Foods Market, Inc.                                 2,600      132,925
  Wicor, Inc.                                              2,100       97,519
  Wiley (John) & Sons, Inc. (Class A)                      1,700       92,225
+ Williams-Sonoma, Inc.                                    2,200       92,125
+ Wilmar Industries Inc.                                   1,300       31,037
+ Wind River Systems, Inc.                                 2,200       87,312
  Windmere-Durable Holdings Inc.                           2,800       63,175
+ Winstar Communications, Inc.                             2,800       69,825
+ Wolverine Tube, Inc.                                     2,200       68,200
+ Wonderware Corporation                                   1,600       22,600
+ World Access, Inc.                                       1,900       45,362
+ World Color Press, Inc.                                  4,500      119,531
+ Wyman-Gordon Company                                     2,100       41,212
  Wynn's International, Inc.                               2,600       82,875
  X-Rite, Inc.                                             3,000       54,750
+ Xircom, Inc.                                             4,200       42,262
  Xtra Corporation                                         1,700       99,662
+ Xylan Corp.                                              3,200       48,400
+ Yahoo! Inc.                                              1,650      114,262
+ Yellow Corporation                                       2,900       72,681
+ Young Broadcasting Inc. (Class A)                        1,100       42,625
+ Zale Corporation                                         3,500       80,500
+ Zebra Technologies Corporation (Class A)                 2,200       65,450
+ Zenith Electronics Corporation                           2,700       14,681
  Zenith National Insurance Corp.                          1,600       41,200
  Zila, Inc.                                               3,000       17,812
+ Zilog, Inc.                                              2,200       41,937
+ Zitel Corporation                                        1,700       16,150
+ Zoltek Companies, Inc.                                   1,100       30,662
  Zurn Industries, Inc.                                    1,900       59,731
  Zygo Corp.                                               1,200       22,500
  ---------------------------------------------------------------------------
  Total Common Stocks (Cost--$75,752,189) -- 87.0%                 83,317,890
================================================================================
  SHORT-TERM       Face
  OBLIGATIONS     Amount                                Issue
================================================================================
  COMMERCIAL    $4,500,000  CIT Group Holdings, Inc. (The), 
  PAPER**                     6.75% due 1/02/1998                   4,499,156
                 2,386,000  General Electric Capital Corp., 
                              6.75% due 1/02/1998                   2,385,553
                 4,500,000  General Motors Acceptance Corp., 
                              6.75% due 1/02/1998                   4,499,156
================================================================================
                Total Short-Term Obligations (Cost--$11,383,865) 
                  -- 11.9%                                         11,383,865
================================================================================
                Total Investments (Cost--$87,136,054)
                  -- 98.9%                                         94,701,755
                Variation Margin on Financial Futures Contracts++ 
                  -- 0.1%                                              70,200
                Other Assets Less Liabilities -- 1.0%                 973,154
                Net Assets -- 100.0%                              $95,745,109
================================================================================

                                      71
<PAGE>
 
*    American Depositary Receipts (ADR).
**   Commercial Paper is traded on a discount basis; the interest rates shown
     are the discount rates paid at the time of purchase by the Series.
(a)  Warrants entitle the Series to purchase a predetermined number of shares of
     common stock. The purchase price and number of shares are subject to
     adjustment under certain conditions until the expiration date.
(b)  The rights may be exercised until 3/31/1999.
+    Non-income producing security.
++   Financial futures contracts purchased as of December 31, 1997 were as
     follows:

     -----------------------------------------------------------------
     Number of                       Expiration             Value
     Contracts       Issue              Date           (Notes 1a & 1b)
     -----------------------------------------------------------------
        54         Russell 2000      March 1998          $11,916,450
     -----------------------------------------------------------------
     (Total Contract Price -- $11,717,292)               $11,916,450
                                                         ===========
     -----------------------------------------------------------------

     See Notes to Financial Statements.

STATEMENT OF ASSETS AND LIABILITIES

<TABLE>
<CAPTION>
MERRILL LYNCH
SMALL CAP
INDEX SERIES          As of December 31, 1997
==================================================================================================================
<S>                   <C>                                                              <C>            <C>
Assets:               Investments, at value (identified cost--$87,136,054) (Note 1a)..                $ 94,701,755
                      Cash on deposit for financial futures contracts (Note 1b).......                     351,000
                      Receivables:
                        Contributions................................................. $  1,141,603
                        Securities sold...............................................      107,647
                        Dividends.....................................................       88,795
                        Variation margin (Note 1b)....................................       70,200
                        Investment adviser (Note 2)...................................       16,544      1,424,789
                                                                                       ------------
                      Deferred organization expenses (Note 1e)........................                       5,540
                                                                                                      ------------
                      Total assets....................................................                  96,483,084
                                                                                                      ------------
==================================================================================================================
Liabilities:          Payables:
                        Withdrawals...................................................      387,959
                        Securities purchased..........................................      288,292        676,251
                                                                                       ------------
                      Accrued expenses and other liabilities..........................                      61,724
                                                                                                      ------------
                      Total liabilities ..............................................                     737,975
                                                                                                      ------------
==================================================================================================================
Net Assets:           Net assets......................................................                $ 95,745,109
                                                                                                      ============
==================================================================================================================
Net Assets            Partners' capital...............................................                $ 87,980,250
Consist of:           Unrealized appreciation on investments--net.....................                   7,764,859
                                                                                                      ------------
                      Net assets......................................................                $ 95,745,109
                                                                                                      ============
==================================================================================================================
</TABLE>
                      See Notes to Financial Statements.


                                      72
<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

STATEMENT OF OPERATIONS

<TABLE>
<CAPTION>
MERRILL LYNCH
SMALL CAP
INDEX SERIES          For the Period April 9, 1997+ to December 31, 1997
==================================================================================================================
<S>                   <C>                                                              <C>            <C>
Investment Income     Dividends.......................................................                $    571,104
(Note 1d):            Interest and discount earned....................................                     321,624
                                                                                                      ------------
                      Total income....................................................                     892,728
                                                                                                      ------------
==================================================================================================================
Expenses:             Custodian fees.................................................. $     45,748
                      Investment advisory fees (Note 2)...............................       36,425
                      Accounting services (Note 2)....................................       31,090
                      Pricing fees....................................................        9,445
                      Professional fees...............................................        5,081
                      Trustees' fees and expenses.....................................        2,203
                      Amortization of organization expenses (Note 1e).................          968
                                                                                       ------------
                      Total expenses before reimbursement.............................      130,960
                                                                                       ------------
                      Reimbursement of expenses (Note 2)..............................      (47,367)
                                                                                       ------------
                      Total expenses after reimbursement..............................                      83,593
                                                                                                      ------------
                      Investment income--net..........................................                     809,135
                                                                                                      ------------
==================================================================================================================
Realized &            Realized gain from investments--net.............................                   1,553,214
Unrealized Gain       Unrealized appreciation on investments--net.....................                   7,764,859
On Investments--Net                                                                                   ------------
(Notes 1b, 1d & 3):   Net Increase in Net Assets Resulting from Operations............                $ 10,127,208
                                                                                                      ============
==================================================================================================================
</TABLE>
                      + Commencement of operations.

                        See Notes to Financial Statements.

STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
MERRILL LYNCH                                                                                      For the Period
SMALL CAP                                                                                        April 9, 1997+ to
INDEX SERIES          Increase (Decrease) in Net Assets:                                         December 31, 1997
==================================================================================================================
<S>                   <C>                                                                             <C>
Operations:           Investment income--net..........................................                $    809,135
                      Realized gain on investments--net...............................                   1,553,214
                      Unrealized appreciation on investments--net.....................                   7,764,859
                                                                                                      ------------
                      Net increase in net assets resulting from operations............                  10,127,208
                                                                                                      ------------
==================================================================================================================
Net Capital           Increase in net assets derived from net capital contributions...                  85,617,901
Contributions:                                                                                        ------------
==================================================================================================================
Net Assets:           Total increase in net assets....................................                  95,745,109
                      Beginning of period.............................................                          --
                                                                                                      ------------
</TABLE> 

                                      73
<PAGE>
 
<TABLE> 
<S>                  <C>                                                                             <C> 
                      End of period*..................................................                $ 95,745,109
                                                                                                      ============
==================================================================================================================
                     *Undistributed investment income--net............................                $    809,135
                                                                                                      ============
==================================================================================================================
</TABLE>
                     +Commencement of operations.

                      See Notes to Financial Statements.

FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>
MERRILL LYNCH                                                                                      For the Period
SMALL CAP             The following ratios have been derived from                                April 9, 1997+ to
INDEX SERIES          information provided in the financial statements.                          December 31, 1997
==================================================================================================================
<S>                   <C>                                                                                <C>
Ratios to Average     Expenses, net of reimbursement..................................                         .18%*
                                                                                                         =========
Net Assets:           Expenses........................................................                         .29%*
                                                                                                         =========
                      Investment income--net..........................................                        1.78%*
                                                                                                         =========
==================================================================================================================
Supplemental          Net assets, end of period (in thousands)........................                   $  95,745
Data:                                                                                                    =========
                      Portfolio turnover..............................................                       16.45%
                                                                                                         =========
                      Average commission rate paid....................................                   $   .0237
                                                                                                         =========
==================================================================================================================
</TABLE>
                     *Annualized.
                     +Commencement of operations.
                      See Notes to Financial Statements.

NOTES TO FINANCIAL STATEMENTS

MERRILL LYNCH
SMALL CAP
INDEX SERIES

1. Significant Accounting Policies:

Merrill Lynch Small Cap Index Series (the "Series") is part of Merrill Lynch
Index Trust (the "Trust"). The Trust is registered under the Investment Company
Act of 1940 and is organized as a Delaware business trust. The following is a
summary of significant accounting policies followed by the Series.

(a) Valuation of investments--Portfolio securities which are traded on stock
exchanges are valued at the last sale price as of the close of business on the
day the securities are being valued or, lacking any sales, at the closing bid
price. Securities traded in the over-the-counter market are valued at the last
quoted bid price at the close of trading on the New York Stock Exchange on each
day by brokers that make markets in the securities. Securities traded in the
NASDAQ National Market System are valued at the last sale price prior to the
time of valuation. Portfolio securities which are traded both on the
over-the-counter market and on a stock exchange are valued according to the
broadest and most representative market. Options written are valued at the last
sale price in the case of exchange-traded options or, in the case of options
traded in the over-the-counter market, the last asked price. Options purchased
are valued at the last sale price in the case of exchange-traded options, or in
the case of options traded in the over-the-counter market, the last bid price.
Other investments, including futures contracts and related options, are stated
at market value. Short-term securities

                                      74

<PAGE>
 
             Merrill Lynch Small Cap Index Fund, December 31, 1997

NOTES TO FINANCIAL STATEMENTS (concluded)

MERRILL LYNCH
SMALL CAP
INDEX SERIES

are valued at amortized cost, which approximates market value. Securities and
assets for which market quotations are not readily available are valued at fair
market value, as determined in good faith by or under the direction of the
Trust's Board of Trustees.

(b) Derivative financial instruments--The Series may engage in various portfolio
investment techniques to provide liquidity, or in connection with the Series'
arbitrage strategies. Losses may arise due to changes in the value of the
contract or if the counterparty does not perform under the contract.

o Financial futures contracts--The Series may purchase or sell stock index
futures contracts and options on such futures contracts as a proxy for a direct
investment in securities underlying the Series' index. Upon entering into a
contract, the Series deposits and maintains as collateral such initial margin as
required by the exchange on which the transaction is effected. Pursuant to the
contract, the Series agrees to receive from or pay to the broker an amount of
cash equal to the daily fluctuation in value of the contract. Such receipts or
payments are known as variation margin and are recorded by the Series as
unrealized gains or losses. When the contract is closed, the Series records a
realized gain or loss equal to the difference between the value of the contract
at the time it was opened and the value at the time it was closed.

o Options--The Series is authorized to purchase and write call and put options.
When the Series writes an option, an amount equal to the premium received by the
Series is reflected as an asset and an equivalent liability. The amount of the
liability is subsequently marked to market to reflect the current market value
of the option written. When a security is purchased or sold through an exercise
of an option, the related premium paid (or received) is added to (or deducted
from) the basis of the security acquired or deducted from (or added to) the
proceeds of the security sold. When an option expires (or the Series enters into
a closing transaction), the Series realizes a gain or loss on the option to the
extent of the premiums received or paid (or a gain or loss to the extent that
the cost of the closing transaction exceeds the premium paid or received).

Written and purchased options are non-income producing investments.

(c) Income taxes--The Series is classified as a partnership for Federal income
tax purposes. As a partnership for Federal income tax purposes, the Series will
not incur Federal income tax liability. Items of partnership income, gain, loss
and deduction will pass through to investors as partners in the Series.
Therefore, no Federal income tax provision is required.

(d) Security transactions and investment income--Security transactions are
accounted for on the date the securities are purchased or sold (the trade
dates). Dividend income is recorded on the ex-dividend dates. Interest income
(including amortization of discount) is recognized on the accrual basis.
Realized gains and losses on security transactions are determined on the
identified cost basis.

(e) Deferred organization expenses--Deferred organization expenses are charged
to expense on a straight-line basis over a five-year period.

2. Investment Advisory Agreement and Transactions with Affiliates:

The Series has entered into an Investment Advisory Agreement with Merrill Lynch
Asset Management, L.P. ("MLAM"). The general partner of MLAM is Princeton
Services, Inc. ("PSI"), an indirect wholly-owned subsidiary of Merrill Lynch &
Co., Inc. ("ML & Co."), which is the limited partner.

MLAM is responsible for the management of the Series' portfolio and provides the
necessary personnel, facilities, equipment and certain other services necessary
to the operations of the Series. For such services, the Series pays a monthly
fee at an annual rate of 0.08% of the average daily value of the Series' net
assets. For the period April 9, 1997 to December 31, 1997, MLAM earned fees of
$36,425, all of which were voluntarily waived. MLAM also reimbursed the Series
for additional expenses of $10,942.

Accounting services are provided to the Series by MLAM at cost. 

Certain officers and/or trustees of the Series are officers and/or directors of
MLAM, PSI, and/or ML & Co.

3. Investments:

Purchases and sales of investments, excluding short-term securities, for the
period April 9, 1997 to December 31, 1997 were $83,077,981 and $8,333,748,
respectively. Net realized and unrealized gains (losses) as of December 31, 1997
were as follows:

                                                   Realized          Unrealized
                                                 Gains (Losses)         Gains
- --------------------------------------------------------------------------------
Long-term investments..................           $   1,005,756     $  7,565,701
Options purchased......................              (6,669,500)              --
Options written........................               6,684,215               --
Financial futures contracts............                 532,743          199,158
                                                  -------------     ------------
Total..................................           $   1,553,214     $  7,764,859
                                                  =============     ============
- --------------------------------------------------------------------------------

                                      75
<PAGE>
 
As of December 31, 1997, net unrealized appreciation for Federal income tax
purposes aggregated $7,561,637, of which $12,291,868 related to appreciated
securities and $4,730,231 related to depreciated securities. At December 31,
1997, the aggregate cost of investments for Federal income tax purposes was
$87,140,118. 

Transactions in options written for the period ended December 31, 1997 were as
follows:

- --------------------------------------------------------------------------------
                                                Nominal Value
Call Options                                    Covered by Call       Premiums
Written                                         Options Written       Received
- --------------------------------------------------------------------------------
Outstanding call options written,
beginning of period....................                     --               --
Options written........................                100,000     $  4,949,585
Options closed.........................               (100,000)      (4,949,585)
                                                 -------------     ------------
Outstanding call options written,
end of period..........................                     --     $         --
                                                 =============     ============
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
                                                Nominal Value
Put Options                                     Covered by Call       Premiums
Written                                         Options Written       Received
- --------------------------------------------------------------------------------
Outstanding put options written,
beginning of period....................                     --               --
Options written........................                100,000     $  3,599,630
Options expired........................               (100,000)      (3,599,630)
                                                 -------------     ------------
Outstanding put options written,
end of period..........................                     --     $         --
                                                 =============     ============
- --------------------------------------------------------------------------------

                                      76
<PAGE>

     
INDEPENDENT AUDITORS' REPORT
 
The Board of Trustees and Investors of 
Merrill Lynch Index Trust:

We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Merrill Lynch Aggregate Bond Index Series (one
of the series constituting Merrill Lynch Index Trust) as of December 31, 1997,
the related statements of operations and changes in net assets, and the
financial highlights for the period April 3, 1997 (commencement of operations)
to December 31, 1997. These financial statements and the financial highlights
are the responsibility of the Trust's management. Our responsibility is to
express an opinion on these financial statements and the financial highlights
based on our audit.

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements and the financial highlights
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. Our
procedures included confirmation of securities owned at December 31, 1997 by
correspondence with the custodian and brokers. An audit also includes assessing
accounting principles used and significant estimates made by management, as well
as evaluating the overall financial statement presentation. We believe that our
audit provides a reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of Merrill Lynch
Aggregate Bond Index Series of the Merrill Lynch Index Trust as of December 31,
1997, the results of its operations, the changes in its net assets, and the
financial highlights for the period April 3, 1997 to December 31, 1997 in
conformity with generally accepted accounting principles.

/s/ Deloitte & Touche LLP

Deloitte & Touche LLP
Princeton, New Jersey
February 18, 1998
     

                                      77
<PAGE>
 
                      Merrill Lynch Aggregate Bond Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS

<TABLE>
<CAPTION>
Merrill Lynch Aggregate Bond Index Series
- ------------------------------------------------------------------------------------------------------------------------------------
                                                 Face      Interest            Maturity                                     Value
 Issue                                          Amount       Rate               Date(s)                  Cost              (Note 1a)
====================================================================================================================================

US Government
Obligations--48.83%
====================================================================================================================================
<S>                                         <C>              <C>               <C>                  <C>                 <C>         
United States Treasury Bonds                $18,810,000      8.75 %            5/15/2017            $ 22,890,325        $ 24,661,603
                                              6,970,000      6.625             2/15/2027               6,771,640           7,566,771
                                              3,100,000      6.375             8/15/2027               3,043,422           3,269,539
                                              1,200,000      6.125            11/15/2027               1,210,875           1,233,192
====================================================================================================================================
United States Treasury Notes                  7,020,000      6.25              6/30/1998               7,036,305           7,046,325
                                              6,330,000      5.75             12/31/1998               6,327,625           6,338,925
                                             10,000,000      6.25              5/31/1999              10,034,994          10,079,700
                                              1,330,000      6.00              6/30/1999               1,336,792           1,336,650
                                              9,950,000      5.875             8/31/1999               9,940,594           9,981,044
                                             11,000,000      6.375             5/15/2000              11,065,830          11,165,000
                                             16,840,000      6.00              8/15/2000              16,838,939          16,961,080
                                              1,900,000      5.75             11/15/2000               1,901,586           1,903,553
                                             16,300,000      6.50              5/31/2002              16,362,893          16,776,286
                                              1,850,000      6.25              6/30/2002               1,852,833           1,886,704
                                              2,100,000      6.00              7/31/2002               2,091,984           2,121,987
                                              5,400,000      6.25              8/31/2002               5,413,547           5,510,538
                                              3,500,000      5.875             9/30/2002               3,488,125           3,519,145
                                              2,800,000      5.75             10/31/2002               2,796,719           2,802,632
                                              1,500,000      5.75             11/30/2002               1,499,734           1,501,170
                                              5,350,000      6.25              2/15/2007               5,158,501           5,520,505
                                              4,200,000      6.625             5/15/2007               4,250,664           4,445,448
                                              4,500,000      6.125             8/15/2007               4,481,047           4,624,470
====================================================================================================================================
Total Investments in US Government Obligations--48.83%                                               145,794,974         150,252,267
====================================================================================================================================
US Government Agency
Mortgage-Backed
Obligations*--29.24%
====================================================================================================================================
Federal Home Loan Mortgage                      311,995      6.50(1)           9/01/2002                 312,092             313,845
Corporation Participation                     1,280,494      6.50         2/01/2011--5/01/2012         1,267,294           1,286,039
 Certificates--Gold Program                   7,035,000      6.50               TBA(3)                 7,010,864           7,045,975
                                              1,585,908      7.00(2)     7/01/2004--11/01/2004         1,599,394           1,609,189
                                              7,384,978      7.00        5/01/2012--12/01/2027         7,379,925           7,470,397
                                                700,000      7.00               TBA(3)                   710,828             710,828
                                              6,129,326      7.50        8/01/2012--12/01/2027         6,226,190           6,279,892
                                                400,000      7.50               TBA(3)                   409,375             409,375
                                              6,357,719      8.00        5/01/2012--11/01/2027         6,538,407           6,587,340
                                                900,000      8.00               TBA(3)                   931,750             931,359
                                              3,898,196      9.50        2/01/2019--10/01/2024         4,190,349           4,212,840
====================================================================================================================================
Federal National Mortgage Association           226,121      5.50              6/01/2011                 211,000             219,125
Mortgage-Backed Securities                       99,409      6.00(2)          11/01/2004                  97,949              98,291
                                              3,266,253      6.00        1/01/2026--11/01/2027         3,007,549           3,148,757
                                                200,000      6.00               TBA(3)                   192,563             192,563
                                              1,880,817      6.50(2)     5/01/2004--10/01/2004         1,871,065           1,886,102
                                              2,029,841      6.50        3/01/2027--11/01/2027         1,966,620           2,004,467
</TABLE> 

                                      78
<PAGE>

<TABLE> 
 <S>                                  <C>               <C>                <C>                   <C>                 <C>    
                                                500,000      6.50               TBA(3)                   493,203             493,203
                                             10,991,268      7.00        4/01/2027--12/01/2027        10,887,234          11,070,186
                                                100,000      7.00               TBA(3)                   100,797             100,718
                                              9,419,811      7.50        8/01/2027--11/01/2027         9,513,456           9,629,832
                                                891,222      9.50        12/01/2017--1/01/2025           958,516             958,979
====================================================================================================================================
Government National Mortgage Association      1,859,649      6.00         3/15/2011--2/15/2012         1,805,336           1,841,629
Mortgage-Backed Securities                      870,975      6.50              4/15/2026                 821,439             861,987
                                                718,000      6.50               TBA(3)                   706,613             710,590
                                              2,610,892      7.00        11/15/2027--12/15/2027        2,625,081           2,632,093
                                                300,000      7.00               TBA(3)                   302,156             302,156
                                              4,143,384      7.50        3/15/2027--12/15/2027         4,186,484           4,244,359
                                                300,000      7.50               TBA(3)                   307,172             307,311
                                              5,957,759      8.00        1/01/2020--10/15/2027         6,088,872           6,175,574
                                              4,632,159      8.50        7/15/2025--10/15/2027         4,831,853           4,865,510
                                                775,423      9.00        4/15/2018--11/15/2019           832,805             842,654
                                                493,538      9.50              2/15/2027                 535,797             535,360
====================================================================================================================================
Total Investments in US Government Agency Mortgage-Backed Obligations--29.24%                         88,920,028          89,978,525
</TABLE>

<TABLE>
<CAPTION>
====================================================================================================================================
                   S&P    Moody's   Face
INDUSTRIES        Ratings Ratings  Amount             Corporate Bonds & Notes
=================================================================================================================================
<S>                  <C>   <C>   <C>         <C>                                                        <C>             <C>
Asset-Backed         AAA   Aaa  $1,000,000   Standard Credit Card Master Trust, 5.50% 
Securities**--0.32%                             due 1/07/1999                                             990,000         993,430
=================================================================================================================================
Banking--2.60%       A-    A1    1,000,000   Chase Manhattan Corp., 9.75% due 11/01/2001                1,112,050       1,114,530
                     A     A1      500,000   Citicorp, 9.50% due 2/01/2002                                553,875         556,870
                     A     A1      500,000   Citicorp, 7.625% due 5/01/2005                               527,890         534,575
                     BBB+  A3    1,020,000   Fleet/Norstar Financial Group, Inc., 8.125% 
                                                due 7/01/2004                                           1,066,374       1,108,648
                     A     A2      500,000   NationsBank Corp., 6.50% due 8/15/2003                       500,435         504,810
                     AA-   Aa3   1,835,000   Norwest Corporation, 5.75% due 2/01/2003                   1,730,864       1,796,465
                     A+    A1    1,050,000   Republic New York Corp., 7.53% due 12/04/2026              1,047,322       1,069,110
                     AA    Aa2     230,000   Swiss Bank Corp. N.Y., 7.50% due 7/15/2025                   225,195         249,424
                     BBB+  A1    1,000,000   Wells Fargo Capital, 8.125% due 12/01/2026 (a)               967,500       1,076,170
                                                                                                       ----------      ----------
                                                                                                        7,731,505       8,010,602
=================================================================================================================================
Financial Services-- BBB+  A2      200,000   Heller Financial, Inc., 7% due 5/15/2002                     197,878         203,024
1.53%                A+    A1      275,000   International Lease Finance Corp., 6.625% 
                                                due 4/01/1999                                             274,461         276,493
                     A     Baa1  1,000,000   Lehman Brothers, Inc., 10% due 5/15/1999                   1,055,900       1,048,320
                     BBB+  Baa1  1,000,000   Paine Webber Group, Inc., 7.74% due 1/30/2012              1,063,050       1,097,720
                     A     A2    2,000,000   Salomon Smith Barney Holdings, Inc., 7.125% 
                                                due 10/01/2006                                          1,996,200       2,071,740
                                                                                                       ----------      ----------
                                                                                                        4,587,489       4,697,297
=================================================================================================================================
</TABLE>


                                      79
<PAGE>
 
                      Merrill Lynch Aggregate Bond Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

<TABLE>
<CAPTION>
                  Merrill Lynch Aggregate Bond Index Series (continued)
                  ---------------------------------------------------------------------------------------------------------------
                   S&P    Moody's   Face                                                                                   Value
INDUSTRIES        Ratings Ratings  Amount             Corporate Bonds & Notes                             Cost           (Note la)
=================================================================================================================================
<S>                  <C>   <C>   <C>         <C>                                                     <C>             <C>
Financial Services-- AA-   Aa3   $ 500,000   Associates Corp. N.A., 7.46% due 3/28/2000                 $ 513,070       $ 515,405
Consumer--1.47%      AA-   Aa3     500,000   Associates Corp. N.A., 7.125% due 5/15/2000                  509,825         512,530
                     A+    Aa3     200,000   CIT Group Holdings, Inc., 5.875% due 10/15/2008              178,758         188,574
                     A+    A1    1,000,000   Commercial Credit Co., 6.125% due 3/01/2000                  985,890         998,390
                     A-    Baa1    500,000   Finova Capital Corp., 6.45% due 6/01/2000                    502,715         501,780
                     A     A2    1,250,000   Household Finance Corp., 7.75% due 6/01/1999               1,279,177       1,275,987
                     A+    Aa3     500,000   Travelers Capital II, 7.75% due 12/01/2036                   507,205         518,515
                                                                                                     ------------    ------------
                                                                                                        4,476,640       4,511,181
=================================================================================================================================
Foreign Government   BBB+  A3      600,000   People's Republic of China, 6.625% due 1/15/2003             589,332         590,880
Obligations--1.40%   AA    Aa2   1,000,000   Province of British Columbia, 7.25% due 9/01/2036          1,019,840       1,101,540
                     AA-   Aa3     500,000   Province of Ontario, 7.375% due 1/27/2003                    524,060         524,330
                     AA-   Aa3     500,000   Province of Ontario, 7.625% due 6/27/2004                    531,870         537,070
                     A     A3      400,000   Province of Saskatchewan, 9.125% due 2/15/2021               513,708         519,076
                     AA    Aa3   1,000,000   Republic of Italy, 6.875% due 9/27/2023                      967,770       1,049,510
                                                                                                     ------------    ------------
                                                                                                        4,146,580       4,322,406
=================================================================================================================================
Industrial--         A+    A1    1,000,000   Anheuser-Busch Co., Inc., 6.75% due 11/01/2006               969,880       1,009,730
Consumer Goods--     A     A2      500,000   Philip Morris Companies, Inc., 9% due 1/01/2001              534,935         534,220
0.73%                A     A2      365,000   Philip Morris Companies, Inc., 6.95% due 6/01/2006           367,606         378,016
                     BBB-  Baa3    300,000   RJR Nabisco, Inc., 8.75% due 7/15/2007                       319,341         325,329
                                                                                                     ------------    ------------
                                                                                                        2,191,762       2,247,295
=================================================================================================================================
Industrial--         AA-   A1      500,000   Consolidated Natural Gas Co., 6.625% due 12/01/2008          493,905         510,915
Energy--0.97%        BBB+  Baa2    500,000   Enron Corp., 6.625% due 10/15/2003                           499,400         503,110
                     AA    Aa2     100,000   Mobil Corp., 7.25% due 3/15/1999                             101,251         101,369
                     BBB   Baa2    500,000   Occidental Petroleum Corp., 10.125% due 11/15/2001           562,455         564,120
                     A-    A3    1,000,000   Phillips Petroleum Co., 8.86% due 5/15/2022                1,088,410       1,129,440
                     BBB-  Baa3    150,000   USX Corp., 8.125% due 7/15/2023                              165,882         167,502
                                                                                                     ------------    ------------
                                                                                                        2,911,303       2,976,456
=================================================================================================================================
Industrial--         A     A3      150,000   Chrysler Corp., 7.45% due 3/01/2027                          157,253         160,359
Manufacturing--      AA-   Aa3   1,000,000   E.I. du Pont de Nemours, 7.95% due 1/15/2023               1,009,260       1,053,260
3.05%                A     A1      500,000   Ford Motor Credit Co., 8% due 6/15/2002                      531,655         532,615
                     A     A1    1,000,000   Ford Motor Credit Co., 7.75% due 11/15/2002                1,025,760       1,060,990
                     A     A1      500,000   Ford Motor Credit Co., 7.20% due 6/15/2007                   522,220         527,140
                     AAA   Aaa     300,000   General Electric Capital Corp., 8.375% due 3/01/2001         316,032         319,116
                     A-    A3    1,600,000   General Motors Acceptance Corp., 5.45% due 3/01/1999       1,571,584       1,588,832
                     A-    A3      100,000   General Motors Acceptance Corp., 9.375% due 4/01/2000        106,398         106,414
                     BBB-  Baa2    500,000   Georgia-Pacific Corp., 7.375% due 12/01/2025                 512,055         509,435
                     A     A1    1,000,000   International Business Machines Corp., 7.125% 
                                                due 12/01/2096                                            948,080       1,034,560
                     BBB+  A3      500,000   Lockheed Martin Corp., 7.25% due 5/15/2006                   522,245         524,045
                     A     A2      900,000   Lucent Technologies, Inc., 6.90% due 7/15/2001               895,563         923,292

</TABLE> 
                                      80
<PAGE>
<TABLE> 
<CAPTION> 
<S>              <C>     <C>    <C>        <C>                                             <C>                      <C> 
                     BBB   Baa3    500,000   Seagate Technology, Inc., 7.45% due 3/01/2037                505,315         513,510
                     A-    A2      500,000   Xerox Capital Trust I, 8% due 2/01/2027                      517,340         529,369
                                                                                                     ------------    ------------
                                                                                                        9,140,760       9,382,937
=================================================================================================================================
Industrial--         BBB+  Baa1  1,500,000   Norfolk Southern Corp., 7.70% due 5/15/2017                1,538,160       1,652,520
Other--1.24%         BBB   Baa2  1,000,000   Union Pacific Corp., 9.625% due 12/15/2002                 1,135,940       1,130,740
                     BB+   Baa3    650,000   United Air Lines, Inc., 9% due 12/15/2003                    721,292         729,274
                     A     A2      300,000   WMC Finance, USA, 7.25% due 11/15/2013                       291,822         308,643
                                                                                                     ------------    ------------
                                                                                                        3,687,214       3,821,177
=================================================================================================================================
Industrial--         BBB+  Baa2  1,000,000   American Stores Co., 9.125% due 4/01/2002                  1,110,040       1,100,080
Services--2.50%      BBB-  Baa3    500,000   Circus Circus Enterprises, Inc., 7.625% due 7/15/2013        502,325         512,775
                     BBB-  Baa3    450,000   Comcast Cable Communications, 8.375% due 5/01/2007           491,864         501,165
                     BBB+  Baa1  1,000,000   Dayton Hudson Co., 10% due 1/01/2011                       1,227,430       1,276,770
                     A     A2      360,000   May Department Stores Co., 7.60% due 6/01/2025               345,942         392,868
                     BBB   Baa3  1,000,000   News America Holdings, Inc., 8.50% due 2/15/2005           1,073,535       1,096,610
                     A     A2      200,000   Penney (J.C.) & Co., 7.95% due 4/01/2017                     204,476         223,612
                     A-    A2      500,000   Sears, Roebuck & Co., 6.25% due 1/15/2004                    493,995         497,240
                     BBB-  Ba1     500,000   TCI Communications, Inc., 6.875% due 2/15/2006               482,050         501,840
                     BBB-  Ba1     100,000   Tele-Communications, Inc., 9.80% due 2/01/2012               110,548         124,321
                     BBB-  Ba1     500,000   Time Warner, Inc., 7.95% due 2/01/2000                       515,375         515,370
                     BBB-  Ba1     400,000   Time Warner, Inc., 8.18% due 8/15/2007                       410,104         435,384
                     A     A2      500,000   Walt Disney Co., 6.75% due 3/30/2006                         512,650         516,045
                                                                                                     ------------    ------------
                                                                                                        7,480,334       7,694,080
=================================================================================================================================
Utilities--          BBB-  Ba1   1,000,000   360 Communications Co., 7.125% due 3/01/2003               1,019,270       1,021,260
Communications--     AAA   Aaa     900,000   BellSouth Telecommunications, Inc., 6.75% due 10/15/2033     796,973         873,216
1.24%                A     Baa1    750,000   GTE Corp., 7.83% due 5/01/2023                               722,123         779,843
                     A     A2      150,000   MCI Communications Corp., 7.50% due 8/20/2004                155,665         157,271
                     A     Aa3     200,000   U S West Communications, Inc., 6.875% due 9/15/2033          178,850         191,516
                     BBB-  Ba1     750,000   WorldCom, Inc., 7.75% due 4/01/2007                          776,430         805,418
                                                                                                     ------------    ------------
                                                                                                        3,649,311       3,828,524
=================================================================================================================================
Utilities--          AA-   A1    1,470,000   Baltimore Gas & Electric Co., 8.375% due 8/15/2001         1,551,365       1,570,474
Gas & Electric--     BBB+  A3      100,000   Detroit Edison Co., 5.93% due 2/01/2001                       96,905          99,275
2.29%                BBB+  A3      500,000   Detroit Edison Co., 7.22% due 8/01/2002                      518,860         518,905
                     A-    A3      500,000   Houston Lighting & Power Co., 8.75% due 3/01/2022            538,705         561,515
                     A-    A3    1,000,000   Pennsylvania Power & Light Resources, Inc., 8.50% 
                                                due 5/01/2022                                           1,056,750       1,067,710
                     A-    A3    1,700,000   Public Service Electric & Gas Co., 6.50% due 6/01/2000     1,699,252       1,711,662
                     A     A2      200,000   Virginia Electric and Power Co., 6.25% due 8/01/1998         200,378         200,378
                     AA+   A2    1,250,000   Wisconsin Electric Power Co., 7.25% due 8/01/2004          1,280,137       1,315,525
                                                                                                     ------------    ------------
                                                                                                        6,942,352       7,045,444
=================================================================================================================================
Yankees--            AA-   Aa3     425,000   Abbey National First Capital, 8.20% due 10/15/2004           450,003         464,920
Corporate--1.44%     A     A2      500,000   BHP Finance USA Ltd., 6.42% due 3/01/2026                    497,170         501,355
                     A+    A2      550,000   Grand Metropolitan Investment PLC, 9% due 8/15/2011          617,518         662,084
</TABLE>

                                      81

<PAGE>
 
                      Merrill Lynch Aggregate Bond Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (concluded)

<TABLE>
<CAPTION>
                  Merrill Lynch Aggregate Bond Index Series (concluded)
                  ---------------------------------------------------------------------------------------------------------------
                   S&P    Moody's   Face                                                                                   Value
INDUSTRIES        Ratings Ratings  Amount             Corporate Bonds & Notes                             Cost           (Note la)
=================================================================================================================================
<S>                  <C>   <C>   <C>         <C>                                                     <C>             <C>
Yankees--            A+    A2   $1,000,000   Hydro-Quebec, 8.875% due 3/01/2026                         1,116,000    $  1,242,780
Corporate            BBB+  A3      500,000   Philips Electronics N.V., 7.75% due 5/15/2025                512,285         534,110
(concluded)          A+    A1    1,000,000   Santander Finance Ltd., 7% due 4/01/2006                   1,004,440       1,022,190
                                                                                                     ------------    ------------
                                                                                                        4,197,416       4,427,439
=================================================================================================================================
                     Total Investments in Corporate Bonds & Notes--20.78%                              62,132,666      63,958,268
=================================================================================================================================
                      Face Amount                     Short-Term Securities
=================================================================================================================================
Repurchase           $11,793,000             Nikko Securities Co., purchased on 12/31/97 to yield 
Agreements***--                                 6.75% to 1/02/1998                                     11,793,000      11,793,000
3.83%
=================================================================================================================================
                     Total Investments in Short-Term Securities--3.83%                                 11,793,000      11,793,000
=================================================================================================================================
                     Total Investments--102.68%                                                      $308,640,668     315,982,060
                                                                                                     ============
                     Liabilities in Excess of Other Assets--(2.68%)                                                    (8,241,663)
                                                                                                                     ------------
                     Net Assets--100.00%                                                                             $307,740,397
                                                                                                                     ============
=================================================================================================================================
</TABLE>

                     *     Mortgage-Backed Obligations are subject to
                           principal paydowns as a result of prepayments or
                           refinancing of the underlying mortgage
                           instruments. As a result, the average life may be
                           substantially less than the original maturity.
                     **    Subject to principal paydowns.
                     ***   Repurchase Agreements are fully collateralized by
                           US Government Agency Obligations.
                     (a)   The security may be offered and sold to "qualified
                           institutional buyers" under Rule 144A of the
                           Securities Act of 1933.
                     (1)   Represents balloon mortgages that amortize on a
                           30-year schedule and have 5-year maturities.
                     (2)   Represents balloon mortgages that amortize on a
                           30-year schedule and have 7-year maturities.
                     (3)   Represents a "to-be-announced" (TBA) transaction.
                           The Series has committed to purchasing securities
                           for which final maturity information is not
                           available at this time.
                           Ratings of issues shown have not been audited by
                           Deloitte & Touche LLP.
                           See Notes to Financial Statements.

STATEMENT OF ASSETS AND LIABILITIES

<TABLE>
<CAPTION>
MERRILL LYNCH
AGGREGATE BOND
INDEX SERIES        As of December 31, 1997
==============================================================================================================
<S>                                                                                 <C>           <C>
Assets:             Investments, at value (identified cost--$308,640,668) (Note 1a)               $315,982,060
                    Cash .......................................................                        98,056
                    Receivables:                                                                              
                       Interest ................................................    $3,587,396                
                       Contributions ...........................................       473,792       4,061,188
                                                                                    ----------
                    Deferred organization expenses (Note 1e) ...................                        15,842

</TABLE> 
                                      82
<PAGE>
<TABLE> 
<CAPTION> 
<S>             <C>                                                     <C>                <C>    <C>   
                    Prepaid expenses ...........................................                           714
                                                                                                  ------------
                    Total assets ...............................................                   320,157,860
                                                                                                  ------------
==============================================================================================================
Liabilities:        Payables:                                                                                 
                       Securities purchased ....................................    12,133,853                
                       Withdrawals .............................................       181,211                
                       Investment adviser (Note 2) .............................         1,471      12,316,535
                                                                                    ----------
                    Accrued expenses and other liabilities .....................                       100,928
                                                                                                  ------------
                    Total liabilities ..........................................                    12,417,463
                                                                                                  ------------
==============================================================================================================
Net Assets:         Net assets .................................................                  $307,740,397
                                                                                                  ============
==============================================================================================================
Net Assets          Partners' capital ..........................................                  $300,399,005
Consist of:         Unrealized appreciation on investments--net ................                     7,341,392
                                                                                                  ------------
                    Net assets .................................................                  $307,740,397
                                                                                                  ============
==============================================================================================================
</TABLE>

                    See Notes to Financial Statements.

STATEMENT OF OPERATIONS

<TABLE>
<CAPTION>
MERRILL LYNCH
AGGREGATE BOND
INDEX SERIES          For the Period April 3, 1997+ to December 31, 1997
==============================================================================================================
<C>                   <S>                                                           <C>           <C>
Investment Income     Interest and discount earned...............................                 $  9,531,892
(Note 1d):            Other .....................................................                       54,707
                                                                                                  ------------
                      Total income...............................................                    9,586,599
                                                                                                  ------------
==============================================================================================================
Expenses:             Accounting services (Note 2)...............................   $  113,606
                      Investment advisory fees (Note 2)..........................       88,609
                      Custodian fees.............................................       34,772
                      Professional fees..........................................       16,098
                      Pricing fees...............................................        6,615
                      Trustees' fees and expenses................................        3,065
                      Amortization of organization expenses (Note 1e)............        2,775
                      Registration fees..........................................          250
                      Other .....................................................          879
                      Total expenses before reimbursement........................      266,669
                                                                                    ----------
                      Reimbursement of expenses (Note 2).........................      (42,985)
                                                                                    ----------
                      Total expenses after reimbursement.........................                      223,684
                                                                                                  ------------
                      Investment income--net.....................................                    9,362,915
                                                                                                  ------------
==============================================================================================================
Realized &            Realized gain from investments--net........................                      870,626
Unrealized Gain on    Unrealized appreciation on investments--net................                    7,341,392
Investments - Net                                                                                 ------------
(Notes 1b, 1d & 3):   Net Increase in Net Assets Resulting from Operations.......                 $ 17,574,933
                                                                                                  ============
==============================================================================================================
</TABLE>
                      +  Commencement of operations.
                         See Notes to Financial Statements.



                                      83
<PAGE>
 
                      Merrill Lynch Aggregate Bond Index Fund, December 31, 1997

STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>
MERRILL LYNCH                                                                                  For the Period
AGGREGATE BOND                                                                                April 3, 1997+ to
INDEX SERIES       Increase (Decrease) in Net Assets:                                         December 31, 1997
===============================================================================================================
<C>                <S>                                                                             <C>         
Operations:        Investment income--net...............................................           $  9,362,915
                   Realized gain on investments--net....................................                870,626
                   Unrealized appreciation on investments--net..........................              7,341,392
                                                                                                   ------------
                   Net increase in net assets resulting from operations.................             17,574,933
                                                                                                   ------------
===============================================================================================================
Net Capital        Increase in net assets derived from net capital contributions........            290,165,464
Contributions:                                                                                     ------------
===============================================================================================================
Net Assets:        Total increase in net assets.........................................            307,740,397
                   Beginning of period..................................................                     --
                                                                                                   ------------
                   End of period........................................................           $307,740,397
                                                                                                   ============
===============================================================================================================
</TABLE>
                   +  Commencement of operations. 
                      See Notes to Financial Statements.

FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>
MERRILL LYNCH                                                                                  For the Period  
AGGREGATE BOND          The following ratios have been derived from                           April 3, 1997+ to
INDEX SERIES            information provided in the financial statements.                     December 31, 1997
===============================================================================================================
<C>                     <S>                                                                        <C>  
Ratios to Average       Expenses, net of reimbursement .................................                   .15%*
Net Assets:                                                                                        ===========  
                        Expenses .......................................................                   .18%*
                                                                                                   ===========  
                        Investment income--net .........................................                  6.34%*
                                                                                                   ===========  
===============================================================================================================
Supplemental            Net assets, end of period (in thousands) .......................           $   307,740  
Data:                                                                                              ===========  
                        Portfolio turnover .............................................                 86.58% 
                                                                                                   ===========  
===============================================================================================================
</TABLE>
                        *  Annualized.
                        +  Commencement of operations.
                           See Notes to Financial Statements.

                                      84
<PAGE>
 
NOTES TO FINANCIAL STATEMENTS

MERRILL LYNCH
AGGREGATE BOND
INDEX SERIES

1. Significant Accounting Policies:

Merrill Lynch Aggregate Bond Index Series (the "Series") is part of Merrill
Lynch Index Trust (the "Trust"). The Trust is registered under the Investment
Company Act of 1940 and is organized as a Delaware business trust. The following
is a summary of significant accounting policies followed by the Series.

(a) Valuation of investments--Portfolio securities which are traded on stock
exchanges are valued at the last sale price as of the close of business on the
day the securities are being valued or, lacking any sales, at the closing bid
price. Securities traded in the over-the-counter market are valued at the last
quoted bid price at the close of trading on the New York Stock Exchange on each
day by brokers that make markets in the securities. Securities traded in the
NASDAQ National Market System are valued at the last sale price prior to the
time of valuation. Portfolio securities which are traded both on the
over-the-counter market and on a stock exchange are valued according to the
broadest and most representative market. Options written are valued at the last
sale price in the case of exchange-traded options or, in the case of options
traded in the over-the-counter market, the last asked price. Options purchased
are valued at the last sale price in the case of exchange-traded options or, in
the case of options traded in the over-the-counter market, the last bid price.
Other investments, including futures contracts and related options, are stated
at market value. Short-term securities are valued at amortized cost, which
approximates market value. Securities and assets for which market quotations are
not readily available are valued at fair market value, as determined in good
faith by or under the direction of the Trust's Board of Trustees.

(b) Derivative financial instruments--The Series may engage in various portfolio
investment techniques to provide liquidity, or in connection with the Series'
arbitrage strategies. Losses may arise due to changes in the value of the
contract or if the counterparty does not perform under the contract.

o Financial futures contracts--The Series may purchase or sell financial futures
contracts and options on such futures contracts as a proxy for a direct
investment in securities underlying the Series' index. Upon entering into a
contract, the Series deposits and maintains as collateral such initial margin as
required by the exchange on which the transaction is effected. Pursuant to the
contract, the Series agrees to receive from or pay to the broker an amount of
cash equal to the daily fluctuation in value of the contract. Such receipts or
payments are known as variation margin and are recorded by the Series as
unrealized gains or losses. When the contract is closed, the Series records a
realized gain or loss equal to the difference between the value of the contract
at the time it was opened and the value at the time it was closed.

o Options--The Series is authorized to purchase and write call and put options.
When the Series writes an option, an amount equal to the premium received by the
Series is reflected as an asset and an equivalent liability. The amount of the
liability is subsequently marked to market to reflect the current market value
of the option written. When a security is purchased or sold through an exercise
of an option, the related premium paid (or received) is added to (or deducted
from) the basis of the security acquired or deducted from (or added to) the
proceeds of the security sold. When an option expires (or the Series enters into
a closing transaction), the Series realizes a gain or loss on the option to the
extent of the premiums received or paid (or a gain or loss to the extent that
the cost of the closing transaction exceeds the premium paid or received).

Written and purchased options are non-income producing investments.

(c) Income taxes--The Series is classified as a partnership for Federal income
tax purposes. As a partnership for Federal income tax purposes, the Series will
not incur Federal income tax liability. Items of partnership income, gain, loss
and deduction will pass through to investors as partners in the Series.
Therefore, no Federal income tax provision is required.

(d) Security transactions and investment income--Security transactions are
accounted for on the date the securities are purchased or sold (the trade
dates). Dividend income is recorded on the ex-dividend dates. Interest income
(including amortization of discount) is recognized on the accrual basis.
Realized gains and losses on security transactions are determined on the
identified cost basis.

(e) Deferred organization expenses--Deferred organization expenses are charged
to expense on a straight-line basis over a five-year period.

(f) Dollar rolls--The Series may sell securities for delivery in the current
month and simultaneously contract to repurchase substantially similar (same
type, coupon and maturity) securities on a specific future date.


                                      85
<PAGE>
 
                      Merrill Lynch Aggregate Bond Index Fund, December 31, 1997

NOTES TO FINANCIAL STATEMENTS (concluded)

MERRILL LYNCH
AGGREGATE BOND
INDEX SERIES

2. Investment Advisory Agreement and Transactions with Affiliates:

The Series has entered into an Investment Advisory Agreement with Merrill Lynch
Asset Management, L.P. ("MLAM"). The general partner of MLAM is Princeton
Services, Inc. ("PSI"), an indirect wholly-owned subsidiary of Merrill Lynch &
Co., Inc. ("ML & Co."), which is the limited partner.

MLAM is responsible for the management of the Series' portfolio and provides the
necessary personnel, facilities, equipment and certain other services necessary
to the operations of the Series. For such services, the Series pays a monthly
fee at an annual rate of 0.06% of the average daily value of the Series' net
assets. For the period April 3, 1997 to December 31, 1997, MLAM earned fees of
$88,609, of which $37,562 was voluntarily waived. MLAM also reimbursed the
Series for additional expenses of $5,423.

Accounting services are provided to the Series by MLAM at cost.

Certain officers and/or trustees of the Series are officers and/or directors of
MLAM, PSI, and/or ML & Co.

3. Investments:

Purchases and sales of investments, excluding short-term securities, for the
period April 3, 1997 to December 31, 1997 were $458,285,968 and $162,247,751,
respectively.

Net realized and unrealized gains as of December 31, 1997 were as follows:

- ------------------------------------------------------------------------
                                           Realized           Unrealized
                                             Gains               Gains
- ------------------------------------------------------------------------
Long-term investments ..............    $   870,626          $ 7,341,392
                                        -----------          -----------
Total ..............................    $   870,626          $ 7,341,392
                                        ===========          ===========
- ------------------------------------------------------------------------

As of December 31, 1997, net unrealized appreciation for Federal income tax
purposes aggregated $7,333,370, of which $7,369,835 related to appreciated
securities and $36,465 related to depreciated securities. At December 31, 1997,
the aggregate cost of investments for Federal income tax purposes was
$308,648,690.

                                      86
<PAGE>
 

INDEPENDENT AUDITORS' REPORT 
 
The Board of Trustees and Investors of 
Merrill Lynch Index Trust:
    
We have audited the accompanying statement of assets and liabilities, including
the schedule of investments, of Merrill Lynch International Index Series (one of
the series constituting Merrill Lynch Index Trust) as of December 31, 1997, the
related statements of operations and changes in net assets, and the financial
highlights for the period April 9, 1997 (commencement of operations) to December
31, 1997. These financial statements and the financial highlights are the
responsibility of the Trust's management. Our responsibility is to express an
opinion on these financial statements and the financial highlights based on our
audit.     

We conducted our audit in accordance with generally accepted auditing standards.
Those standards require that we plan and perform the audit to obtain reasonable
assurance about whether the financial statements and the financial highlights
are free of material misstatement. An audit includes examining, on a test basis,
evidence supporting the amounts and disclosures in the financial statements. Our
procedures included confirmation of securities owned at December 31, 1997 by
correspondence with the custodian and brokers. An audit also includes assessing
accounting principles used and significant estimates made by management, as well
as evaluating the overall financial statement presentation. We believe that our
audit provides a reasonable basis for our opinion.

In our opinion, such financial statements and financial highlights present
fairly, in all material respects, the financial position of Merrill Lynch
International Index Series of the Merrill Lynch Index Trust as of December 31,
1997, the results of its operations, the changes in its net assets, and the
financial highlights for the period April 9, 1997 to December 31, 1997 in
conformity with generally accepted accounting principles.

/s/ Deloitte & Touche LLP

Deloitte & Touche LLP
Princeton, New Jersey
February 18, 1998


                                      87
<PAGE>
 
SCHEDULE OF INVESTMENTS

<TABLE>
<CAPTION>

                       Merrill Lynch International Index Series
                       -----------------------------------------------------------------------
                                                                      Shares            Value
COUNTRY                Investments                                     Held           (Note 1a)
==============================================================================================
<S>                    <C>                                           <C>            <C>
Australia              Australian Gas Light Company (The)             28,500        $  198,522
                       Boral Limited                                  36,500            92,195
                       Broken Hill Proprietary Company Ltd.           32,500           301,494
                       CSR Limited                                    37,800           127,961
                       Coca-Cola Amatil, Ltd.                         18,700           139,584
                       Coles Myer Ltd.                                18,200            87,321
                       Foster's Brewing Group Ltd.                    54,000           102,650
                       ICI Australia Ltd.                             13,300            93,077
                       National Australia Bank Limited                26,500           369,700
                       The News Corporation Ltd.                      49,600           273,493
                       The News Corporation Ltd. (Preferred)          42,500           210,107
                       Normandy Mining Ltd.                           68,300            66,250
                       North Ltd.                                     37,800            99,465
                       Pacific Dunlop Ltd.                            45,500            96,267
                       Pioneer International Ltd.                     46,100           125,746
                       Rio Tinto Ltd.                                 12,000           139,858
                       Santos Ltd.                                    19,400            79,818
                       Schroders Property Fund                       117,800           181,903
                       Smith (Howard) Ltd.                             9,000            74,644
                       Sons of Gwalia Ltd.                            20,800            47,393
                       Tabcorp Holdings Limited                       30,400           142,491
                       WMC Limited                                    30,200           105,182
                       Westpac Banking Corporation                    36,600           233,882
                       -----------------------------------------------------------------------
                       Total Investments in Australia
                         (Cost--$3,754,697)--2.4%                                    3,389,003
==============================================================================================
Austria                Austria Mikro Systeme International AG            700            35,474
                       Bank Austria AG                                 4,467           221,052
                       Bank Austria AG (Class A)                       5,600           283,791
                       Bank Austria AG (Preferred)                     2,866           127,539
                       EA--Generali AG                                   800           210,246
                       Flughafen Wien AG                               2,550           101,362
                       Mayr-Melnhof Karton AG                          1,900           102,319
                       OMV AG (Class A)                                2,500           346,425
                       Oesterreichische Elektrizitaetswirtschafts
                         AG (Verbund)                                  3,750           397,894
                       VA--Technologie AG (VA TECH)                    1,500           227,809
                       Wienerberger Baustoffindustrie AG               1,150           220,821
                       -----------------------------------------------------------------------
                       Total Investments in Austria
                         (Cost--$2,240,917)--1.6%                                    2,274,732
==============================================================================================
Belgium                Barco NV (Belgian American Radio Corp.)           800           146,924
                       Bekaert NV                                        200           119,105
                       Cimenteries CBR
                         Cementbedrijven SA                            2,400           215,848
                       Electrabel SA                                   2,200           509,210
                       Etablissements Delhaize
                         Freres & Cie 'Le Lion' SA                     2,600           132,015
                       Fortis AG                                         900           187,895
                       Generale de Banque SA                             500           217,752
                       Glaverbel SA                                      500            78,323
                       Groupe Bruxelles Lambert SA                       700           101,334
                       Petrofina SA                                      700           258,535
                       Royale Belge SA                                   600           170,961
                       Solvay SA                                       2,000           125,857
                       Union Miniere SA (b)                              900            62,470
                       -----------------------------------------------------------------------
                       Total Investments in Belgium
                         (Cost--$2,212,407)--1.6%                                    2,326,229
==============================================================================================
Denmark                D/S Norden A/S                                      9           415,146
                       D/S Svendborg A/S                                   6           394,126
                       Danisco A/S                                     2,400           133,127
                       Den Danske Bank A/S                             1,500           199,909
                       FLS Industries A/S                              3,000            71,556
                       Novo Nordisk A/S (Class B)                      2,300           329,022
                       Tele Danmark A/S (Class B)                      4,600           285,376
                       Unidanmark A/S                                  1,800           132,164
                       -----------------------------------------------------------------------
                       Total Investments in Denmark
                         (Cost--$1,460,487)--1.4%                                    1,960,426
==============================================================================================
Finland                Kesko OY                                        9,700           150,464
                       Merita OY (Class A)                            30,800           168,488
                       Nokia OY AB (Series A)                          5,300           376,521
                       Nokia OY AB (Series K)                          3,000           214,777
                       Outokumpu OY                                    6,750            79,922
                       Rauma OY                                        3,800            59,293
                       Sampro Insurance Company Ltd.                   3,000            96,650
                       UPM-Kymmene OY                                  8,750           174,438
                       -----------------------------------------------------------------------
                       Total Investments in Finland
                         (Cost--$1,230,227)--0.9%                                    1,320,553
==============================================================================================
</TABLE>


                                      88 
<PAGE>
 
                       Merrill Lynch International Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

<TABLE>
<CAPTION>

                       Merrill Lynch International Index Series (continued)
                       ----------------------------------------------------------------------- 
                                                                      Shares            Value
COUNTRY                Investments                                     Held           (Note 1a)
==============================================================================================
<S>                    <C>                                           <C>            <C>
France                 Accor SA                                        1,150        $  213,798
                       Alcatel Alsthom Cie Generale
                         d'Electricite SA                              5,450           692,682
                       Axa SA                                         10,800           835,614
                       Banque Nationale de Paris SA (BNP)              7,400           393,298
                       Bouygues SA                                     1,150           130,304
                      +Canal+                                          1,150           213,798
                       Carrefour Supermarche SA                        1,250           652,102
                       Compagnie de Saint-Gobain SA                    3,250           461,663
                       Compagnie Financiere de Paribas SA              6,100           530,038
                       Compagnie Generale des Eaux SA                  4,400           614,055
                       Compagnie Generale des Etablissements
                         Michelin SA (Class B)                         4,800           241,635
                       Comptoirs Modernes SA                             400           204,685
                       Elf Aquitaine SA                                9,050         1,052,500
                       Eridania Beghin-Say SA                          1,300           203,240
                      +France Telecom SA                              26,315           954,405
                       Generale des Eaux SA (Warrants)(a)              1,500             1,019
                       Groupe Casino Guichard Perachon SA              2,600           144,708
                       Groupe Danone SA                                2,650           473,293
                       Havas SA                                        3,150           226,607
                       Imetal SA                                       1,200           149,128
                       L'Air Liquide SA                                2,150           336,484
                       L'Oreal SA                                      2,250           880,337
                       LVMH Moet-Hennessy Louis Vuitton SA             2,950           489,625
                       Lafarge SA                                      3,900           255,875
                       Lagardere SCA                                   4,700           155,391
                       Legrand SA                                      1,050           209,163
                       Lyonnaise des Eaux SA                           4,100           453,663
                       Pathe SA                                          550           106,729
                       Pernod Ricard SA                                3,100           182,323
                       Peugeot SA                                      2,150           271,116
                       Pinault-Printemps-Redoute SA (b)                  750           400,108
                       Promodes SA                                       650           269,654
                       Rhone-Poulenc SA (Class A)                     11,500           515,102
                       SAGEM SA                                          350           155,840
                       Sanofi SA                                       3,750           417,428
                       Schneider SA                                    4,950           268,759
                       Sidel SA                                        1,300            86,177
                       Societe Bic SA                                  2,200           160,568
                       Societe Generale de France SA                   3,250           442,765
                       Societe Nationale d'Exploitation Industrielle
                         des Tabacs et Allumettes SA                   3,400           122,014
                       Sodexho Alliance SA                               300           160,641
                       Thomson-CSF SA                                  4,000           126,067
                       Total SA (Class B)                              8,200           892,341
                       Usinor-Sacilor SA                               9,450           136,435
                       Valeo SA                                        2,650           179,719
                       -----------------------------------------------------------------------
                       Total Investments in France
                         (Cost--$15,089,984)--11.2%                                 16,062,896
==============================================================================================
Germany                AMB Aachener und Muenchener
                         Beteiligungs AG                               2,000           218,479
                       Adidas AG                                       2,000           263,064
                       Allianz AG                                      9,250         2,396,320
                       BASF AG                                        27,150           962,204
                       Bayer AG                                       30,850         1,152,502
                       Bayerische Hypotheken-und
                         Wechsel-Bank AG                              12,200           595,486
                       Bayerische Vereinsbank AG                      12,100           791,733
                       Beiersdorf AG                                   4,450           192,962
                       Bugerus AG                                        250           112,019
                       CKAG Colonia Konzern AG                         1,150           109,962
                       Continental AG                                  5,650           124,697
                       Daimler-Benz AG                                21,900         1,536,458
                       Degussa AG                                      4,400           220,147
                       Deutsche Bank AG                               20,050         1,415,583
                       Deutsche Telekom AG                            95,000         1,787,720
                       Dresdner Bank AG                               19,550           902,074
                       Friedrich Grohe AG (Preferred)                    500           121,192
                       Heidelberger Zement AG                          2,700           192,128
                       Hochtief AG                                     3,400           134,201
                       Karstadt AG                                       700           238,976
                       Linde AG                                          400           244,163
                       Lufthansa AG                                   16,450           315,502
                       MAN AG                                            550           159,301
                       METRO AG                                        9,520           341,361
                       Mannesmann AG                                   1,550           783,272
                       Merck KGaA                                      8,100           263,426
                       Muenchener Rueckversicherungs-
                         Gesellschaft AG                               3,000         1,130,754
                       Preussag AG                                       700           213,642
                       RWE AG                                         14,150           759,103
                       RWE AG (Preferred)                              9,000           380,253
                       SAP AG                                          2,650           805,106

</TABLE> 

                                      89
<PAGE>

<TABLE> 
<CAPTION> 
<S>                                                                   <C>           <C>  
                       SAP AG (Preferred)                              1,850           605,251
                       SGL CARBON AG                                   1,050           135,424
                       Schering AG                                     3,050           294,182
                       Siemens AG                                     23,850         1,412,066
                       Thyssen AG                                      1,450           310,346
                       VEBA AG                                        21,400         1,457,360
                       Viag AG                                         1,150           619,496
                       Volkswagen AG                                   1,200           675,117
                       Volkswagen AG (Preferred)                         400           171,670
                       -----------------------------------------------------------------------
                       Total Investments in Germany
                         (Cost--$22,402,898)--17.1%                                 24,544,702
==============================================================================================
Hong Kong              Cheung Kong (Holdings) Limited                 33,000           216,167
                       China Light & Power Company, Limited           22,000           122,104
                       Hang Seng Bank Limited                         13,000           125,428
                       Hong Kong Telecommunications Ltd.              83,000           170,874
                       Hutchison Whampoa Ltd.                         27,000           169,371
                       Sun Hung Kai Properties Limited                19,000           132,430
                       Swire Pacific Ltd. (Class A)                   18,000            98,742
                       -----------------------------------------------------------------------
                       Total Investments in Hong Kong
                         (Cost--$1,261,299)--0.7%                                    1,035,116
==============================================================================================
Ireland                Allied Irish Banks PLC                         28,800           278,543
                       CRH PLC                                        21,300           249,025
                       Greencore Group PLC                            41,300           193,845
                       Jefferson Smurfit Group PLC                    46,200           130,106
                       -----------------------------------------------------------------------
                       Total Investments in Ireland
                         (Cost--$814,194)--0.6%                                        851,519
==============================================================================================
Italy                  Assicurazioni Generali SpA                     47,100         1,156,735
                       Banca Commerciale Italiana SpA                115,300           400,800
                       Banca Popolare di Milano SpA (SCRL)            23,800           149,322
                       Banco Ambrosiano Veneto SpA                    34,100           130,487
                       Benetton SpA                                   13,056           213,640
                       Bulgari SpA                                    18,400            93,602
                       Cartiere Burgo SpA                             13,000            77,705
                       Credito Italiano SpA                          138,500           427,039
                       Edison SpA                                     43,400           262,480
                       Ente Nazionale Idrocarburi (ENI) SpA          483,700         2,742,206
                       Fiat SpA                                      231,300           672,642
                       Fiat SpA (Preferred)                           80,730           123,203
                       Fiat SpA (RNC)                                 67,300           111,266
                       Finanziario Montedison SpA                    333,000           299,083
                       Istituto Bancario San Paolo di Torino SpA      49,400           471,886
                       Istituto Mobiliare Italiano SpA                37,400           443,929
                       Istituto Nazionale delle Assicurazioni
                         (INA) SpA                                   276,500           560,283
                       Italcementi SpA                                13,900            96,873
                       Italgas SpA                                    50,200           207,133
                       Mediaset SpA                                   77,800           382,140
                       Mediobanca-Banca di Credito                    29,300           230,034
                      +Olivetti Group SpA                            181,344           109,573
                       Parmalat Finanziaria SpA                      112,200           160,449
                       Pirelli SpA                                    94,100           251,579
                       Riunione Adriatica di Sicurta SpA              21,600           211,825
                       Sirti SpA                                      23,000           139,102
                       TIM SpA (RISP)                                 98,400           279,760
                       TIM SpA (RNC)                                  55,365           244,092
                       Telecom Italia Mobile SpA                     252,000         1,163,000
                       Telecom Italia SpA                            218,333         1,394,508
                       -----------------------------------------------------------------------
                       Total Investments in Italy
                         (Cost--$10,777,604)--9.2%                                  13,206,376
==============================================================================================
Japan                  Acom Co., Ltd.                                  5,000           276,392
                       Advantest Corporation                           2,000           113,628
                       Ajinomoto Co., Inc.                            12,000           117,006
                       Alps Electric Co. Ltd.                          4,000            37,774
                       Aoyama Trading Co., Ltd.                        2,000            35,777
                       Asahi Bank, Ltd.                               50,000           203,455
                       Asahi Breweries, Ltd.                          12,000           175,048
                       Asahi Chemical Industry Co., Ltd.              32,000           108,591
                       Asahi Glass Co., Ltd.                          29,000           138,042
                       Autobacs Seven Co., Ltd.                        1,000            28,791
                       Bank of Tokyo-Mitsubishi, Ltd.                101,000         1,395,777
                       Bank of Yokohama, Ltd.                         30,000            79,232
                       Bridgestone Corporation                        16,000           347,639
                       CSK Corporation                                 1,000            25,643
                       Canon Inc.                                     18,000           420,115
                       Casio Computer Co., Ltd.                        2,000            14,372
                       Chiba Bank Ltd.                                14,000            43,532
                       Chugai Pharmaceutical Co., Ltd.                40,000           205,758
                       Citizen Watch Co., Ltd.                         2,000            13,436
                       Cosmo Oil Company, Ltd.                        38,000            57,766
                       Credit Saison Co., Ltd.                         3,000            74,165
                       Dai Nippon Printing Co., Ltd.                  17,000           319,770
                       Daiei, Inc. (The)                              21,000            87,063
                       Daimaru, Inc.                                   5,000            11,823
                       Dainippon Ink & Chemicals, Inc.                66,000           167,217
                       Dainippon Screen Manufacturing Co., Ltd.        4,000            18,426
                       Daito Trust Construction Co., Ltd.              1,000             6,119
                       Daiwa House Industry Co., Ltd.                 24,000           127,140
                       Daiwa Securities Co., Ltd.                     27,000            93,282
                       East Japan Railway Co.                             76           343,678
==============================================================================================
</TABLE>

                                      90
<PAGE>
 
                       Merrill Lynch International Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

<TABLE>
<CAPTION>

                       Merrill Lynch International Index Series (continued)
                       ----------------------------------------------------------------------- 
                                                                      Shares            Value
COUNTRY                Investments                                     Held           (Note 1a)
==============================================================================================
<S>                    <C>                                           <C>            <C>
Japan                  Ebara Corporation                               3,000        $   31,785
(concluded)            Eisai Co., Ltd.                                 3,000            45,835
                       Fanuc Ltd.                                      5,000           189,635
                       Fuji Bank, Ltd.                                63,000           255,386
                       Fuji Photo Film Co., Ltd.                      11,000           422,265
                       Fujikura Ltd.                                   6,000            39,800
                       Fujita Kanko Inc.                               1,000            10,749
                       Fujitsu Limited                                40,000           429,942
                       Furukawa Electric Co., Ltd.                    17,000            72,960
                       Gunma Bank, Ltd.                                8,000            52,207
                       Hankyu Department Stores, Inc.                  2,000            11,132
                       Hirose Electric Co., Ltd.                       1,000            51,209
                       Hitachi Ltd.                                   70,000           499,808
                       Honda Motor Co., Ltd.                          21,000           772,284
                       Hoya Corporation                                2,000            62,956
                       Industrial Bank of Japan Ltd.                  55,000           392,706
                       Isetan Company Limited                          6,000            25,106
                       Ito Yokado Co., Ltd.                            9,000           459,501
                       Itochu Corporation                             24,000            37,774
                      +Japan Airlines Company, Ltd.                   38,000           103,570
                       Japan Energy Corp.                             68,000            64,215
                       Joyo Bank, Ltd.                                24,000            84,760
                       Jusco Co., Ltd.                                 7,000            98,887
                       Kajima Corporation                             37,000            93,459
                       Kaneka Corporation                             48,000           217,059
                       Kansai Electric Power Co., Inc. (The)          18,000           305,413
                       Kao Corporation                                14,000            90,288
                       Kawasaki Heavy Industries Ltd.                 19,000            29,466
                       Kawasaki Steel Corporation                     67,000            91,562
                       Keihin Electric Express Railway Co., Ltd.      49,000           171,171
                       Kinden Corporation                              8,000            85,374
                       Kirin Brewery Company Ltd.                     20,000           145,873
                       Kokuyo Co., Ltd.                                1,000            17,274
                       Komatsu Ltd.                                   26,000           130,749
                       Konami Co., Ltd.                                1,000            24,645
                       Kubota Corporation                             90,000           237,697
                       Kurita Water Industries Ltd.                    2,000            20,422
                       Kyocera Corporation                             4,000           181,804
                       Lion Corporation                              111,000           328,952
                       Makita Electric Work Ltd.                       1,000             9,597
                       Marubeni Corporation                           18,000            31,647
                       Marui Co., Ltd.                                 9,000           140,269
                       Matsushita Electric Industrial Co., Ltd.       45,000           659,885
                       Minebea Co., Ltd.                              13,000           139,731
                       Mitsubishi Chemical Corp.                      59,000            84,706
                       Mitsubishi Corporation                         32,000           253,052
                       Mitsubishi Electric Corporation                40,000           102,572
                       Mitsubishi Estate Co., Ltd.                    28,000           305,259
                       Mitsubishi Heavy Industries, Ltd.              71,000           296,537
                       Mitsubishi Logistics Corporation                3,000            31,324
                       Mitsubishi Materials Corporation                8,000            12,898
                       Mitsubishi Oil Company, Ltd.                   38,000            56,307
                      +Mitsubishi Trust and Banking Corp.             28,000           281,612
                       Mitsui & Co., Ltd.                             38,000           225,228
                       Mitsui Chemicals Inc.                             600             1,106
                       Mitsui Fudosan Co., Ltd.                       17,000           164,453
                       Mitsui Marine & Fire Insurance Co., Ltd.       19,000            97,152
                       Mitsui Mining & Smelting Co., Ltd.             10,000            40,230
                       Mitsui O.S.K. Lines, Ltd.                       7,000             9,727
                       Mitsui Trust & Banking Company, Ltd.           28,000            54,388
                       Mitsukoshi, Ltd.                                9,000            23,977
                       Murata Manufacturing Company, Ltd.              5,000           125,912
                       Mycal Corporation                               4,000            33,474
                       NEC Corporation                                34,000           362,841
                       NGK Spark Plug Co., Ltd.                        1,000             5,681
                       NKK Corporation                                90,000            71,862
                       NSK Ltd.                                        4,000             9,981
                       NTN Corporation                                57,000           132,161
                       Namco Limited                                   1,000            29,098
                       Nankai Electric Railway Co., Ltd.              40,000           175,048
                       Nichido Fire & Marine Insurance Co., Ltd.       4,000            20,883
                       Nikon Corporation                               8,000            79,232
                       Nippon Comsys Corporation                       1,000            12,361
                       Nippon Express Co., Ltd.                       24,000           119,770
                       Nippon Fire & Marine Insurance Co., Ltd.       11,000            41,297
                       Nippon Light Metal Company Ltd.                 5,000             7,294
                       Nippon Oil Co., Ltd.                           43,000           111,255
                       Nippon Paper Industries Co., Ltd.              26,000           102,203
                       Nippon Steel Corp.                            144,000           213,374
                       Nippon Telegraph & Telephone Corp.                276         2,373,282
                       Nippon Yusen Kabushiki Kaisha Chiyoda          18,000            49,474
                       Nippondenso Finance NV                         18,000           324,760
                       Nissan Food Products                            1,000            18,196
                       Nissan Motor Co., Ltd.                         51,000           211,440

</TABLE> 

                                      91
<PAGE>

<TABLE> 
<CAPTION> 
<S>                                                                  <C>              <C>  
                       Nitto Denko Corp.                              12,000           207,294
                       Nomura Securities Co., Ltd.                    43,000           574,434
                       Noritake Co., Ltd.                              2,000             9,551
                       OJI Paper Co., Ltd.                            16,000            63,754
                       Obayashi Corporation                           35,000           119,309
                       Omron Corporation                               7,000           109,635
                       Orix Corporation                                1,000            69,866
                       Osaka Gas Co., Ltd.                            38,000            86,940
                       Pioneer Electronic Corp.                        4,000            61,727
                       Rohm Company, Limited                           2,000           204,223
                       SMC Corporation                                 2,000           176,583
                       Sakura Bank Ltd.                               74,000           211,916
                       Sankyo Company Limited                          9,000           203,839
                       Sanyo Electric Co., Ltd.                       54,000           140,960
                       Secom Co., Ltd.                                 4,000           256,123
                       Sega Enterprises, Ltd.                          3,000            54,357
                       Seino Transportation Co., Ltd.                 22,000           109,958
                       Sekisui Chemical Co., Ltd.                     16,000            81,443
                       Sekisui House, Ltd.                            21,000           135,271
                       Seventy-Seven Bank Ltd.                         4,000            28,560
                       Sharp Corporation                              22,000           151,678
                       Shimano Inc.                                    6,000           110,557
                       Shimizu Corporation                            24,000            55,647
                       Shin-Etsu Chemical Co., Ltd.                    7,000           133,820
                       Shiseido Company, Ltd.                         13,000           177,658
                       Shizuoka Bank, Ltd. (The)                      17,000           182,726
                       Sony Corporation                                8,000           712,476
                       Sumitomo Bank, Ltd.                            68,000           777,889
                       Sumitomo Chemical Co., Ltd.                    33,000            76,008
                       Sumitomo Corporation                           24,000           134,511
                       Sumitomo Electric Industries Ltd.              14,000           191,324
                       Sumitomo Heavy Industries, Ltd.                 3,000             9,190
                       Sumitomo Marine & Fire
                         Insurance Co., Ltd.                          18,000            95,355
                       Sumitomo Metal & Mining Co., Ltd.              25,000            82,534
                       Sumitomo Metal Industries, Ltd.                70,000            89,750
                       Taisho Pharmaceutical Co., Ltd.                 5,000           127,831
                       Taiyo Yuden Co., Ltd.                           2,000            13,896
                       Takara Shuzo Co., Ltd.                          2,000             7,447
                       Takashimaya Co.                                 9,000            54,587
                       Takeda Chemical Industries, Ltd.               18,000           514,088
                       Teikoku Oil Co., Ltd.                          57,000           148,791
                       Toho Co., Ltd.                                  1,100           117,390
                       Tohoku Electric Power Company, Inc.            11,000           167,217
                       Tokai Bank, Limited                            44,000           205,390
                       Tokio Marine & Fire Insurance Co., Ltd.        33,000           374,971
                       Tokyo Broadcasting System, Inc.                 4,000            50,672
                       Tokyo Dome Corporation                          3,000            19,992
                       Tokyo Electric Power Co., Inc. (The)           28,000           511,631
                       Tokyo Electron Limited                          4,000           128,369
                       Tokyo Gas Co., Ltd.                            48,000           109,083
                       Tokyu Corporation                              27,000           104,476
                       Toppan Printing Co., Ltd.                      20,000           261,036
                       Toray Industries, Inc.                         23,000           103,301
                       Tostem Corporation                              7,000            75,240
                       Toto Ltd.                                       3,000            19,209
                       Toyo Seikan Kaisha, Ltd.                        8,000           114,242
                       Toyobo Co., Ltd.                              118,000           143,140
                       Toyoda Automatic Loom Works, Ltd.              17,000           313,244
                       Toyota Motor Corporation                       82,000         2,354,549
                       UNI-CHARM Corporation                           1,000            35,470
                       UNY Co., Ltd.                                   5,000            68,714
                       Wacoal Corp.                                   15,000           149,712
                       Yamaguchi Bank Ltd.                             3,000            36,852
                       Yamaha Corporation                              6,000            68,177
                       Yamaichi Securities Company Ltd.               23,000               177
                       Yamanouchi Pharmaceutical Co., Ltd.             4,000            85,988
                       Yamato Transport Co., Ltd.                     23,000           309,021
                       Yamazaki Baking Co., Ltd.                       2,000            19,501
                      +Yasuda Trust & Banking Co., Ltd.               29,000            28,944
                       Yokogawa Electric Corporation                   3,000            18,564
                       -----------------------------------------------------------------------
                       Total Investments in Japan
                         (Cost--$39,971,369)--22.2%                                 31,872,451
==============================================================================================
Malaysia               Commerce Asset Holding BHD                     59,000            28,247
                       Rashid Hassain BHD                             99,000            47,907
                       Resorts World BHD                              60,000           101,158
                       Telekom Malaysia BHD                           44,000           130,245
                       -----------------------------------------------------------------------
                       Total Investments in Malaysia
                         (Cost--$722,564)--0.2%                                        307,557
==============================================================================================
Netherlands            ABN AMRO Holding N.V.                          17,800           346,765
                       Akzo N.V.                                         800           137,936
                       Elsevier N.V.                                  10,800           174,709
                       Heineken N.V.                                     800           139,278
                       Internationale Nederlanden Groep N.V.          10,312           434,329
                       Koninklijke Ahold N.V.                         10,800           281,772
                       Philips Electronics N.V.                        4,000           239,890
                       Royal Dutch Petroleum N.V.                     19,600         1,075,893
                       Royal PTT Nederland N.V.                        6,900           287,897
                       Unilever N.V.                                   8,000           493,194
                       Wolters Kluwer N.V.                             1,200           155,001
                       -----------------------------------------------------------------------
                       Total Investments in the Netherlands
                         (Cost--$3,282,921)--2.6%                                    3,766,664
==============================================================================================
</TABLE>


                                      92

<PAGE>
 
                       Merrill Lynch International Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (continued)

<TABLE>
<CAPTION>

                       Merrill Lynch International Index Series (continued)
                       -----------------------------------------------------------------------
                                                                      Shares            Value
COUNTRY                Investments                                     Held           (Note 1a)
==============================================================================================
<S>                    <C>                                           <C>            <C>
New Zealand            Brierley Investments Limited                  193,600        $  138,186
                       Fletcher Challenge Building                    34,900            71,289
                       Fletcher Challenge Forests Division            44,900            37,259
                       Fletcher Challenge Paper                       63,000            82,258
                       Telecom Corporation of New Zealand             45,100           218,532
                       -----------------------------------------------------------------------
                       Total Investments in New Zealand 
                         (Cost--$682,894)--0.4%                                        547,524
==============================================================================================
Norway                 Aker RGI ASA (Class A)                          3,700            66,870
                       Aker RGI ASA (Class B)                          1,900            30,982
                       Christiania Bank og Kreditkasse                42,000           170,077
                       Dyno Industriere ASA                            6,400           123,495
                       Elkem ASA                                       4,200            55,932
                       Kvaerner ASA                                    2,100           107,297
                       Norsk Hydro ASA                                11,000           537,369
                      +Nycomed Amersham PLC                            2,667           100,388
                       Orkla ASA (A Shares)                            2,100           181,207
                      +Petroleum Geo-Services ASA                      1,600           101,101
                      +Storebrand ASA                                 13,700            96,807
                       -----------------------------------------------------------------------
                       Total Investments in Norway 
                         (Cost--$1,609,177)--1.1%                                    1,571,525
==============================================================================================
Singapore              City Development Ltd.                          11,000            51,011
                      +Creative Technology Ltd.                        1,000            20,333
                       DBS Land Ltd.                                  58,000            88,966
                       Keppel Corporation Ltd.                        62,000           178,407
                       Singapore Airlines Ltd.                        37,000           241,974
                       -----------------------------------------------------------------------
                       Total Investments in Singapore 
                         (Cost--$907,701)--0.4%                                        580,691
==============================================================================================
Spain                  Acerinox S.A.                                     600            88,461
                       Autopista Concesionaria Espanola S.A.
                         (ACESA)                                      11,500           154,102
                       Banco Bilbao Vizcaya S.A.                      24,600           794,692
                       Banco Central Hispanoamericano S.A.            14,400           350,069
                       Banco Santander S.A.                           18,000           600,354
                       Corporacion Bancaria de Espana S.A.
                         (Argentaria)                                  4,400           267,270
                       Corporacion Financiera Alba S.A.                1,100           115,687
                       Endesa S.A.                                    38,400           680,637
                       Fomento de Construcciones y
                         Contratas S.A.                                3,200           121,617
                       Gas Natural SDG S.A.                            6,000           310,596
                       Iberdrola S.A.                                 34,200           449,322
                       Repsol S.A. (ADR) (d)                          11,100           472,774
                       Tabacalera S.A. (Class A)                       1,900           153,758
                       Telefonica de Espana S.A.                      33,700           960,586
                       Union Electrica-Fenosa S.A.                    15,000           143,503
                       -----------------------------------------------------------------------
                       Total Investments in Spain 
                         (Cost--$4,759,549)--4.0%                                    5,663,428
==============================================================================================
Sweden                 ABB AB (A Shares)                              13,500           159,834
                       Astra AB 'A' Fria                              23,133           400,628
                       Electrolux AB                                   1,800           124,920
                       H & M Hennes & Mauritz AB                       3,200           141,067
                       Forsakrings AB Skandia                          2,200           103,772
                       Skandinaviska Enskilda Banken AB                9,100           115,190
                       Skanska Banken AB (B Shares)                    2,900           118,893
                       Svenska Cellulosa AB (SCA) (B Shares)           6,500           146,136
                       Svenska Handelsbanken AB                        4,000           138,296
                       Telefonaktiebolaget LM
                         Ericsson (B Shares)                          15,400           578,991
                       Volvo AB (B Shares)                             6,600           177,064
                       -----------------------------------------------------------------------
                       Total Investments in Sweden 
                         (Cost--$2,020,099)--1.5%                                    2,204,791
==============================================================================================
Switzerland            ABB AG (Bearer)                                   100           125,728
                       Credit Suisse Group AG (Registered Shares)      1,350           209,044
                       Nestle SA                                         300           449,949
                       Novartis AG                                       400           649,538
                       Roche Holding AG                                   50           496,917
                       Schweizerische Bankgesellschaft AG                200           289,414
                       Schweizerische Rueckversicherungs-
                         Gesellschaft AG                                 100           187,187
                       Schweizerischer Bankverein AG                     600           186,639
                       Zuerich Versicherungs-Gesellschaft                550           262,282
                       -----------------------------------------------------------------------
                       Total Investments in Switzerland 
                         (Cost--$2,212,854)--2.0%                                    2,856,698
==============================================================================================
</TABLE> 

                                      93
<PAGE>
<TABLE> 
<CAPTION> 
<S>                                                                 <C>                <C>  
United Kingdom         Abbey National PLC                             16,300           292,091
                       B.A.T. Industries PLC                          36,400           331,220
                       BG PLC                                         50,117           225,549
                       BTR PLC                                        53,100           160,479
                       Barclays PLC                                   15,100           401,292
                       Bass PLC                                       10,700           165,994
                       Boots Company PLC (The)                        20,000           287,930
                       British Aerospace PLC                           4,700           133,938
                       British Airways PLC                            11,700           107,617
                       British Petroleum Co. PLC (The)                56,392           740,991
                       British Sky Broadcasting Group PLC             20,800           155,788
                       British Telecommunications PLC                 67,700           532,079
                       Burmah Castrol PLC                             15,900           276,827
                       Cable & Wireless PLC                           26,400           231,987
                       Cadbury Schweppes PLC                          15,800           159,212
                       Carlton Communications PLC                     30,500           235,452
                       Diageo PLC                                     51,700           475,112
                       EMI Group PLC                                  26,300           219,445
                       General Electric Company PLC                   41,300           267,610
                       Glaxo Wellcome PLC                             37,800           894,046
                       Granada Group PLC                              10,100           154,280
                       Great Universal Stores PLC                     11,300           142,357
                       HSBC Holdings PLC                              18,600           458,869
                       HSBC Holdings PLC                               8,900           228,045
                       Imperial Chemical Industries PLC               14,800           231,179
                       Kingfisher PLC                                 15,500           215,890
                       Lloyds/TSB PLC                                 55,300           714,834
                       LucasVarity PLC                                27,900            98,525
                       Marks and Spencer PLC                          29,200           287,286
                       National Grid Group PLC                        22,500           106,804
                       National Power PLC                             15,900           156,694
                       Pearson PLC                                     9,200           119,528
                       Peninsular & Oriental Steam Navigation
                         Co. (The)                                    21,200           241,135
                       Prudential Corporation PLC                     20,900           251,969
                       Railtrack Group PLC                             6,700           106,416
                       Rank Group PLC                                 17,600            97,998
                       Reed International PLC                         16,900           169,325
                       Reuters Holdings PLC                           19,900           217,360
                       Rio Tinto PLC                                  13,000           159,930
                       Royal & Sun Alliance Insurance Group PLC       20,800           209,425
                       Royal Bank of Scotland Group PLC (The)         15,100           191,718
                       Sainsbury (J.) PLC                             19,300           161,354
                       Scottish & Newcastle PLC                       18,200           222,856
                       Scottish Power PLC                             17,800           157,292
                       SmithKline Beecham PLC                         50,800           519,825
                       Tesco PLC                                      21,372           173,762
                       Unilever PLC                                   36,400           311,490
                       Vodafone Group PLC                             38,800           279,770
                       Zeneca Group PLC                               10,000           351,002
                       -----------------------------------------------------------------------
                       Total Investments in the United Kingdom 
                         (Cost--$11,550,770)--9.1%                                  13,031,577
==============================================================================================
</TABLE>

<TABLE>
<CAPTION>

SHORT-TERM             Face
SECURITIES            Amount                   Issue
==============================================================================================
<S>                  <C>          <C>                                              <C>
Commercial           $2,000,000   Eureka Securitization, Inc., 5.80%
Paper*--7.3%                        due 2/09/1998                                   $1,987,433
                      3,444,000   General Motors Acceptance Corp., 6.75%
                                    due 1/02/1998                                    3,443,354
                      5,000,000   Lexington Parker Capital Corp., 5.93%
                                    due 1/20/1998                                    4,984,351
==============================================================================================
</TABLE>


                                      94

<PAGE>
 
                       Merrill Lynch International Index Fund, December 31, 1997

SCHEDULE OF INVESTMENTS (concluded)

<TABLE>
<CAPTION>
                       Merrill Lynch International Index Series (concluded)
                       ---------------------------------------------------------------------------
                       Face                                                               Value
                       Amount                   Issue                                    (Note la)
==================================================================================================
<S>                    <C>          <C>                                                <C>
US Government          $2,000,000   Federal Home Loan Banks, 5.57% due 3/04/1998 (c)  $  1,980,815
Agency Obligations*--
1.4%
                       ---------------------------------------------------------------------------
                       Total Investments in Short-Term Investments 
                         (Cost--$12,395,953)--8.7%                                      12,395,953
==================================================================================================
                       Total Investments (Cost--$141,360,565)--98.9%                   141,770,411
                       Unrealized Depreciation on Forward Foreign Exchange 
                         Contracts**--(0.1%)                                               (88,722)
                       Variation Margin on Financial Futures Contracts***--0.0%             27,457
                       Other Assets Less Liabilities--1.2%                               1,708,654
                                                                                      ------------
                       Net Assets--100.0%                                             $143,417,800
                                                                                      ============
==================================================================================================
</TABLE>

(a) Warrants entitle the Series to purchase a predetermined number of shares of
    common stock. The purchase price and number of shares are subject to
    adjustments under certain conditions until the expiration date.

(b) Security may be offered and sold to "qualified institutional buyers" under
    Rule 144A of the Securities Act of 1933.

(c) Security held as collateral in connection with open financial futures
    contracts.

(d) American Depositary Receipts (ADR).

*   Commercial Paper and certain US Government Agency Obligations are traded on 
    a discount basis; the interest rates shown are the discount rates paid at 
    the time of purchase by the Series.

**  Forward foreign exchange contracts as of December 31, 1997 were as follows:

- -------------------------------------------------------------
                                                 Unrealized
Foreign                                         Appreciation
Currency                         Expiration    (Depreciation)
Purchased                           Date         (Note 1b)
- -------------------------------------------------------------
A$             386,342           March 1998     $   (2,861)
DM           3,085,130           March 1998        (30,540)
Frf          6,324,145           March 1998        (16,751)
HK$          1,160,640           March 1998            140
(pound)        702,908           March 1998         (2,356)
Lit      1,270,490,000           March 1998        (13,609)
Pta         57,849,200           March 1998         (7,661)
Skr          1,921,815           March 1998         (6,922)
(yen)      238,459,200           March 1998         (8,162)
- -------------------------------------------------------------
Total Unrealized Depreciation on Forward
Foreign Exchange Contracts -- Net
(US$ Commitment -- $7,608,087)                  $  (88,722)
                                                ==========
- -------------------------------------------------------------

*** Financial futures contracts purchased as of December 31, 1997 were
    as follows:

- -----------------------------------------------------------------------
Number of                                   Expiration          Value
Contracts          Issue       Exchange        Date           (Note 1a)
- -----------------------------------------------------------------------
     3          Hang Seng        HKFE      January 1998      $  207,551
    20          IBEX 35          MEFF      January 1998         952,297
    14          OMX              OMLX      January 1998         424,502
    18          DTB              DAX       March 1998         4,281,354
    21          CAC              MATIF     March 1998         2,111,165
    11          FTSE             LIFFE     March 1998         2,341,096
   113          Nikkei 300       OSAKA     March 1998         2,058,726
    13          MIB 30           MSE       March 1998         1,858,591
     9          All Ordinaries   SFE       March 1998           386,108
- -----------------------------------------------------------------------
Total Financial Futures Contracts Purchased
(Total Contract Price--$14,496,807)                         $14,621,390
                                                            ===========
- -----------------------------------------------------------------------

+  Non-income producing security.

See Notes to Financial Statements.

                                      95
<PAGE>
 
STATEMENT OF ASSETS AND LIABILITIES

<TABLE>
<CAPTION>

MERRILL LYNCH
INTERNATIONAL
INDEX SERIES         As of December 31, 1997
============================================================================================================================
<S>                  <C>                                                                           <C>          <C>
Assets:              Investments, at value (identified cost--$141,360,565) (Note 1a).............               $141,770,411
                     Cash .......................................................................                      7,584
                     Foreign cash (Note 1c) .....................................................                  1,410,507
                     Receivables:
                       Securities sold..........................................................   $ 737,586
                       Dividends................................................................     221,955
                       Contributions............................................................     135,211
                       Variation margin (Note 1b)...............................................      27,457       1,122,209
                                                                                                   ---------
                     Deferred organization expenses (Note 1f)...................................                      11,163
                     Other assets...............................................................                       2,304
                                                                                                                ------------
                     Total assets...............................................................                 144,324,178
                                                                                                                ------------
============================================================================================================================
Liabilities:         Unrealized depreciation on forward foreign exchange contracts (Note 1b)....                      88,722
                     Payables:                                                                        
                       Withdrawals..............................................................     733,235
                       Investment adviser (Note 2)..............................................       3,142         736,377
                                                                                                   ---------
                     Accrued expenses and other liabilities.....................................                      81,279
                                                                                                                ------------
                     Total liabilities .........................................................                     906,378
                                                                                                                ------------
============================================================================================================================
Net Assets:          Net assets.................................................................                $143,417,800
                                                                                                                ============
============================================================================================================================
Net Assets           Partners' capital..........................................................                $143,001,193
Consist of:          Unrealized appreciation on investments and foreign currency
                     transactions--net..........................................................                     416,607
                                                                                                                ------------
                     Net assets.................................................................                $143,417,800
                                                                                                                ============
============================================================================================================================
</TABLE>
                     See Notes to Financial Statements.


                                      96

<PAGE>
 
                       Merrill Lynch International Index Fund, December 31, 1997

STATEMENT OF OPERATIONS

<TABLE>
<CAPTION>

MERRILL LYNCH
INTERNATIONAL
INDEX SERIES           For the Period April 9, 1997+ to December 31, 1997
============================================================================================================================
<S>                    <C>                                                                         <C>           <C>
Investment Income      Dividends (net of $208,452 foreign withholding tax)........................               $ 1,490,569
(Notes 1d & 1e):       Interest and discount earned...............................................                   613,295
                       Other......................................................................                     1,306
                                                                                                                 -----------
                       Total income...............................................................                 2,105,170
                                                                                                                 -----------
============================================================================================================================
Expenses:              Custodian fees.............................................................  $  127,762
                       Investment advisory fees (Note 2)..........................................     100,102
                       Accounting services (Note 2)...............................................      68,823
                       Pricing fees...............................................................      22,330
                       Professional fees..........................................................       8,155
                       Trustees' fees and expenses................................................       3,361
                       Other......................................................................       1,295
                                                                                                    ----------
                       Total expenses before reimbursement........................................     331,828
                       Reimbursement of expenses (Note 2).........................................     (35,546)
                                                                                                    ----------
                       Total expenses after reimbursement.........................................                   296,282
                                                                                                                 -----------
                       Investment income--net......................................................                1,808,888
                                                                                                                 -----------
============================================================================================================================
Realized &             Realized gain (loss) from:
Unrealized Gain          Investments--net..........................................................  1,983,095
(Loss) on                Foreign currency transactions--net........................................   (292,940)    1,690,155
Investments &                                                                                       ----------
Foreign Currency       Unrealized appreciation (depreciation) from:
Transactions - Net       Investments--net..........................................................    534,429
(Notes 1b, 1c, 1e        Foreign currency transactions--net........................................   (117,822)      416,607
& 3):                                                                                               ----------   -----------
                       Net realized and unrealized gain on investments and foreign currency
                         transactions.............................................................                 2,106,762
                                                                                                                 -----------
                       Net Increase in Net Assets Resulting from Operations.......................               $ 3,915,650
                                                                                                                 ===========
============================================================================================================================
</TABLE>

STATEMENT OF CHANGES IN NET ASSETS

<TABLE>
<CAPTION>

MERRILL LYNCH                                                                                               For the Period
INTERNATIONAL                                                                                              April 9, 1997+ to
INDEX SERIES         Increase (Decrease) in Net Assets:                                                    December 31, 1997
============================================================================================================================
<S>                  <C>                                                                                   <C>
Operations:          Investment income--net.....................................................                $  1,808,888
                     Realized gain on investments and foreign currency transactions--net........                   1,690,155
                     Unrealized appreciation on investments and foreign currency 
                     transactions--net..........................................................                     416,607
                                                                                                                ------------
                     Net increase in net assets resulting from operations.......................                   3,915,650
                                                                                                                ------------
============================================================================================================================
</TABLE> 

                                      97
<PAGE>
<TABLE> 
<CAPTION> 


<S>                  <C>                                                                                      <C>  
Net Capital          Increase in net assets derived from net capital contributions..............                 139,502,150
Contributions:                                                                                                  ------------
============================================================================================================================
Net Assets:          Total increase in net assets...............................................                 143,417,800
                     Beginning of period........................................................                          --
                                                                                                                ------------
                     End of period..............................................................                $143,417,800
                                                                                                                ============
============================================================================================================================
</TABLE>

FINANCIAL HIGHLIGHTS

<TABLE>
<CAPTION>

MERRILL LYNCH                                                                                               For the Period
INTERNATIONAL        The following ratios have been derived from                                           April 9, 1997+ to
INDEX SERIES         information provided in the financial statements.                                     December 31, 1997
============================================================================================================================
<S>                  <C>                                                                                   <C>
Ratios to Average    Expenses, net of reimbursement.............................................                         .33%*
Net Assets:                                                                                                        =========
                     Expenses...................................................................                         .36%*
                                                                                                                   =========
                     Investment income--net......................................................                       1.99%*
                                                                                                                   =========
============================================================================================================================
Supplemental         Net assets, end of period (in thousands)...................................                   $ 143,418
Data:                                                                                                              =========
                     Portfolio turnover.........................................................                       14.79%
                                                                                                                   =========
                     Average commission rate paid++..............................................                  $   .0118
                                                                                                                   =========
============================================================================================================================
</TABLE>

*  Annualized.
++ Includes commissions paid in foreign currencies, which have been converted 
   into US dollars using the prevailing exchange rate on the date of the 
   transaction. Such conversions may significantly affect the rate shown.
+  Commencement of operations.

   See Notes to Financial Statements.


NOTES TO FINANCIAL STATEMENTS

MERRILL LYNCH INTERNATIONAL INDEX SERIES

1. Significant Accounting Policies:

Merrill Lynch International Index Series (the "Series") is part of Merrill Lynch
Index Trust (the "Trust"). The Trust is registered under the Investment Company
Act of 1940 and is organized as a Delaware business trust. The following is a
summary of significant accounting policies followed by the Series.

(a) Valuation of investments--Portfolio securities which are traded on stock
exchanges are valued at the last sale price as of the close of business on the
day the securities are being valued or, lacking any sales, at the closing bid
price. Securities traded in the over-the-counter market are valued at the last
quoted bid price at the close of trading on the New York Stock Exchange on each
day by brokers that make markets in the securities. Securities traded in the
NASDAQ National Market System are valued at the last sale price prior to the
time of valuation. Portfolio securities which are traded both on the
over-the-counter market and on a stock exchange are valued according to the
broadest and most representative market. Options written are valued at the last
sale price in the case of exchange-traded options or, in the case of options
traded in the over-the-counter market, the last asked price. Options purchased
are valued at the last sale price in the case of exchange-traded options or, in
the case of options traded in the over-the-counter market, the last bid price.
Short-term securities are valued at amortized cost, which approximates market
value. Other investments, including futures contracts


                                      98
<PAGE>
 
                       Merrill Lynch International Index Fund, December 31, 1997

NOTES TO FINANCIAL STATEMENTS (concluded)

MERRILL LYNCH INTERNATIONAL INDEX SERIES

and related options, are stated at market value. Securities and assets for which
market quotations are not readily available are valued at fair market value, as
determined in good faith by or under the direction of the Trust's Board of
Trustees.

(b) Derivative financial instruments--The Series may engage in various portfolio
investment techniques to provide liquidity, or in connection with the Series'
arbitrage strategies. Losses may arise due to changes in the value of the
contract or if the counterparty does not perform under the contract.

o Financial futures contracts--The Series may purchase or sell stock index
futures contracts and options on such futures contracts as a proxy for a direct
investment in securities underlying the Series' index. Upon entering into a
contract, the Series deposits and maintains as collateral such initial margin as
required by the exchange on which the transaction is effected. Pursuant to the
contract, the Series agrees to receive from or pay to the broker an amount of
cash equal to the daily fluctuation in value of the contract. Such receipts or
payments are known as variation margin and are recorded by the Series as
unrealized gains or losses. When the contract is closed, the Series records a
realized gain or loss equal to the difference between the value of the contract
at the time it was opened and the value at the time it was closed.

o Options--The Series is authorized to purchase and write call and put options.
When the Series writes an option, an amount equal to the premium received by the
Series is reflected as an asset and an equivalent liability. The amount of the
liability is subsequently marked to market to reflect the current market value
of the option written. When a security is purchased or sold through an exercise
of an option, the related premium paid (or received) is added to (or deducted
from) the basis of the security acquired or deducted from (or added to) the
proceeds of the security sold. When an option expires (or the Series enters into
a closing transaction), the Series realizes a gain or loss on the option to the
extent of the premiums received or paid (or a gain or loss to the extent that
the cost of the closing transaction exceeds the premium paid or received).

Written and purchased options are non-income producing investments.

o Forward foreign exchange contracts--The Series is authorized to enter into
forward foreign exchange contracts as a hedge against either specific
transactions or portfolio positions. Such contracts are not entered on the
Series' records. However, the effect on operations is recorded from the date the
Series enters into such contracts. Premium or discount is amortized over the
life of the contracts.

o Foreign currency options and futures--The Series may also purchase or sell
listed or over-the-counter foreign currency options, foreign currency futures
and related options on foreign currency futures as a short or long hedge against
possible variations in foreign exchange rates. Such transactions may be effected
with respect to hedges on non-US dollar denominated securities owned by the
Series, sold by the Series but not yet delivered, or committed or anticipated to
be purchased by the Series.

(c) Foreign currency transactions--Transactions denominated in foreign
currencies are recorded at the exchange rate prevailing when recognized. Assets
and liabilities denominated in foreign currencies are valued at the exchange
rate at the end of the period. Foreign currency transactions are the result of
settling (realized) or valuing (unrealized) assets or liabilities expressed in
foreign currencies into US dollars. Realized and unrealized gains or losses from
investments include the effects of foreign exchange rates on investments. 

(d) Income taxes--The Series is classified as a partnership for Federal income
tax purposes. As a partnership for Federal income tax purposes, the Series will
not incur Federal income tax liability. Items of partnership income, gain, loss
and deduction will pass through to investors as partners in the Series.
Therefore, no Federal income tax provision is required. Under the applicable
foreign tax law, a withholding tax may be imposed on interest, dividends, and
capital gains at various rates. 

(e) Security transactions and investment income--Security transactions are
accounted for on the date the securities are purchased or sold (the trade
dates). Dividend income is recorded on the ex-dividend dates. Dividends from
foreign securities where the ex-dividend date may have passed are subsequently
recorded when the Series has determined the ex-dividend date. Interest income
(including amortization of discount) is recognized on the accrual basis.
Realized gains and losses on security transactions are determined on the
identified cost basis. 

(f) Deferred organization expenses--Deferred organization expenses are charged
to expense on a straight-line basis over a five-year period.

                                      99
<PAGE>
 
2. Investment Advisory Agreement and Transactions with Affiliates:

The Series has entered into an Investment Advisory Agreement with Merrill Lynch
Asset Management, L.P. ("MLAM"). The general partner of MLAM is Princeton
Services, Inc. ("PSI"), an indirect wholly-owned subsidiary of Merrill Lynch &
Co., Inc. ("ML & Co.") which is the limited partner. 

MLAM is responsible for the management of the Series' portfolio and provides the
necessary personnel, facilities, equipment and certain other services necessary
to the operations of the Series. For such services, the Series pays a monthly
fee at an annual rate of 0.11% of the average daily value of the Series' net
assets. For the period April 9, 1997 to December 31, 1997, MLAM earned fees of
$100,102, of which $35,546 was voluntarily waived. 

Accounting services are provided to the Series by MLAM at cost. 

Certain officers and/or trustees of the Series are officers and/or directors of
MLAM, PSI, and/or ML & Co.

3. Investments:

Purchases and sales of investments, excluding short-term securities, for the
period April 9, 1997 to December 31, 1997 were $142,020,773 and $14,703,706,
respectively.

Net realized and unrealized gains (losses) as of December 31, 1997 were as
follows:

- ---------------------------------------------------------------------------
                                         Realized             Unrealized
                                       Gains (Losses)        Gains (Losses)
- ---------------------------------------------------------------------------
Investments:
 Long-term...........................   $  1,667,804          $   409,846
 Financial futures contracts.........        315,291              124,583
                                        ------------          -----------
Total investments....................      1,983,095              534,429
                                        ------------          -----------
Currency transactions:
 Foreign currency transactions.......         74,950              (29,100)
 Forward foreign exchange contracts..       (367,890)             (88,722)
                                        ------------          -----------
Total currency transactions..........       (292,940)            (117,822)
                                        ------------          -----------
Total................................   $  1,690,155          $   416,607
                                        ============          ===========
- ---------------------------------------------------------------------------

As of December 31, 1997, net unrealized appreciation for Federal income tax
purposes aggregated $156,303, of which $13,170,848 related to appreciated
securities and $13,014,545 related to depreciated securities. At December 31,
1997, the aggregate cost of investments for Federal income tax purposes was
$141,614,108.


                                      100
                                                              
<PAGE>
 
                                     PART C


Item 24.          Financial Statements and Exhibits

                  (a)      Financial Statements

                           (1)      Included in Part A:

                                    None.

                           (2)      Included in Part B:

Schedule of investments and statement of assets and liabilities as of 
December 31, 1997, the related statements of operations and changes in net 
assets, and the financial highlights for the period April 3, 1997 
(commencement of operations) to December 31, 1997 of S&P 500 Index Series.

Schedule of investments and statement of assets and liabilities as of 
December 31, 1997, the related statements of operations and changes in net 
assets, and the financial highlights for the period April 9, 1997 
(commencement of operations) to December 31, 1997 of Small Cap Index Series.

Schedule of investments and statement of assets and liabilities as of
December 31, 1997, the related statements of operations and changes in net
assets, and the financial highlights for the period April 3, 1997 (commencement
of operations) to December 31, 1997 of Aggregate Bond Index Series.

Schedule of investments and statement of assets and liabilities as of
December 31, 1997, the related statements of operations and changes in net
assets, and the financial highlights for the period April 9, 1997 (commencement
of operations) to December 31, 1997 of International Index Series.

                           (3)      Included in Part C:

                                    None.

                  (b) Exhibits:

   
<TABLE>
<CAPTION>

                     Exhibit
                     Number          Description
                     ------          -----------
                     <S>             <C>
    
                     1(a).           Declaration of Trust of Registrant*
    
    
                     1(b)            Certificate of Trust*
    
    
                     1(c)            Amendment to Declaration of Trust**
    
    
                     2.              By-Laws of Registrant*
    
                     3.              Not applicable

                     4.              Instrument Defining Rights of Shareholders.  Incorporated by
                                     reference to Exhibits 1 and 2 above.
                     5               Management Agreement between Registrant and Merrill Lynch
                                     Asset Management, L.P.**
    
                     6.              Placement Agent Agreement with Merrill Lynch Funds Distributor,
                                     Inc.**
    
                     7.              Not applicable

</TABLE>    
                                      101
<PAGE>
 
   
<TABLE>
<CAPTION>
                     Exhibit
                     Number          Description
                     ------          -----------
                     <S>             <C>
     
                     8(a).           Form of Custody Agreement with Merrill Lynch Trust Company**
     
     
                     8(b).           Form of Custody Agreement with State Street Bank and Trust**
     
     
                     9               Licensing Agreement**
     
                     10.             Not applicable
                     11.             Accountant's Consent
                     12.             Not applicable
     
     
                     13.             Not applicable
     
     
                     14.             Not applicable
                     15.             Not applicable
                     16.             Not applicable
     
     
                     17(a).          Financial Data Schedule for S&P 500 Index Series
                     17(b)           Financial Data Schedule to Small Cap Index Series
                     17(c)           Financial Data Schedule for Aggregate Bond Index Series
                     17(d)           Financial Data Schedule for International Index Series
                     17(b).          Powers of Attorney**
     
                     18.             Not applicable
</TABLE>
    

- ----------------------
    
*                 Incorporated by reference to identically numbered Exhibit to
                  the Registrant's initial Registration Statement on Form N-1A
                  (File No. 811-7885).

**                Incorporated by reference to identically numbered Exhibit to
                  Amendment No. 1 to the Registrant's Registration Statement on 
                  Form N-1A
                  (File No. 811-7885).    
    
Item 25.          No person is controlled by or under common control with 
                  Registrant.     

Item 26.          Number of Holders of Securities.

                                                   Number of Holders
                  Fund                             at February 28, 1998
                  ----                             --------------------
                
                  S&P 500 Index Series                    1
                  Small Cap Index Series                  2
                  Aggregate Bond Index Series             2
                  International Index Series              2
    



                                      102
<PAGE>
 
Item 27           Indemnification

                           As permitted by Section 17(h) and (i) of the
                  Investment Company Act of 1940, as amended (the "1940 Act"),
                  and pursuant to Sections 8.2, 8.3 and 8.4, of Article VIII of
                  the Registrant's Declaration of Trust (Exhibit 1 to this
                  Registrant Statement), Trustees, officers, employees and
                  agents of the Trust will be indemnified to the maximum extent
                  permitted by Delaware law and the 1940 Act.

                           Article VIII, Section 8.2 provides, inter alia, that
                  no Trustee, officer, employee or agent of the Registrant shall
                  be liable to the Registrant, its holders, or to any other
                  Trustee, officer, employee or agent for any action or omission
                  except for his own bad faith, wilful misfeasance, gross
                  negligence or reckless disregard of his duties. 

                           Article VIII, Section 8.3 of the Registrant's
                  Declaration of Trust provides:

                                    Section 8.3. Indemnification. The Trust
                           shall indemnify each of its Trustees, officers,
                           employees, and agents (including persons who serve at
                           its request as directors, officers or trustees of
                           another organization in which it has any interest, as
                           a shareholder, creditor or otherwise) against all
                           liabilities and expenses (including amounts paid in
                           satisfaction of judgments, in compromise, as fines
                           and penalties, and as counsel fees) reasonably
                           incurred by him in connection with the defense or
                           disposition of any action, suit or other proceeding,
                           whether civil or criminal, in which he may be
                           involved or with which he may be threatened, while in
                           office or thereafter, by reason of his being or
                           having been such a Trustee, officer, employee or
                           agent, except with respect to any matter as to which
                           he shall have been adjudicated to have acted in bad
                           faith, willful misfeasance, gross negligence or
                           reckless disregard of his duties, such liabilities
                           and expenses being liabilities belonging to the
                           Series out of which such claim for indemnification
                           arises; provided, however, that as to any matter
                           disposed of by a compromise payment by such Person,
                           pursuant to a consent decree or otherwise, no
                           indemnification either for said payment or for any
                           other expenses shall be provided unless there has
                           been a determination that such Person did not engage
                           in willful misfeasance, bad faith, gross negligence
                           or reckless disregard of the duties involved in the
                           conduct of his office by the court or other body
                           approving the settlement or other disposition or, in
                           the absence of a judicial determination, by a
                           reasonable determination, based upon a review of
                           readily available facts (as opposed to a full trial
                           -type inquiry), that he did not engage in such
                           conduct, which determination shall be made by a
                           majority of a quorum of Trustees who are neither
                           interested persons of the Registrant (within the
                           meaning of the 1940 Act) nor parties 


                                      103
<PAGE>
 
                           to the action, suit or proceeding, or by written
                           opinion from independent legal counsel approved by
                           the Trustees. The rights accruing to any Person under
                           these provisions shall not exclude any other right to
                           which he may be lawfully entitled; provided that no
                           Person may satisfy any right of indemnity or
                           reimbursement granted herein or to which he may be
                           otherwise entitled except out of the Trust Property.
                           The Trustees may make advance payments in connection
                           with indemnification under this Section 8.3; Provided
                           that any advance payment of expenses by the Trust to
                           any Trustee, officer, employee or agent shall be made
                           only upon the undertaking by such Trustee, officer,
                           employee or agent to repay the advance unless it is
                           ultimately determined that he is entitled to
                           indemnification as above provided, and only if one of
                           the following conditions is met:

                           (a)      the Trustee, officer, employee or agent to
                                    be indemnified provided a security for an
                                    undertaking; or

                           (b)      the Trust shall be insured against losses
                                    arising by reason of any lawful advances; or

                           (c)      there is a determination, based on a review
                                    of readily available facts, that there is
                                    reason to believe that the Trustee, officer,
                                    employee or agent to be indemnified
                                    ultimately will be entitled to
                                    indemnification, which determination shall
                                    be made by:

                                    (i)     a majority of a quorum of Trustees
                                            who are neither Interested Persons
                                            of the Trust nor parties to the
                                            Proceedings; or

                                    (ii)    an independent legal counsel in a
                                            written opinion.

                           Article VIII, Section 8.4 of the Registrants
                           Declaration of Trust further provides:

                                    Section 8.4. No Protection Against Certain
                           1940 Act Liabilities. Nothing contained in Sections
                           8.1, 8.2 or 8.3 hereof shall protect any Trustee or
                           officer of the Trust from any liability to the Trust
                           or its Holders to which he would otherwise be subject
                           by reason of willful misfeasance, bad faith, gross
                           negligence or reckless disregard of the duties
                           involved in the conduct of his office. Nothing
                           contained in Sections 8.1, 8.2 or 8.3 hereof or in
                           any agreement of the character described in Section
                           4.1 or 4.2 hereof shall protect any Investment
                           Manager or Asset Manager to the Trust or any Series
                           against any liability to the Trust or any Series to
                           which 


                                      104
<PAGE>
 
                           he would otherwise be subject by reason of willful
                           misfeasance, bad faith, or gross negligence in the
                           performance of his or its duties to the Trust or
                           Series, or by reason of his or its reckless disregard
                           to his or its obligations and duties under the
                           agreement pursuant to which he serves as Investment
                           Manager or Asset Manager to the Trust or any Series.

                           As permitted by Article VIII, Section 8.7, the
                  Registrant may insure its Trustees and officers against
                  certain liabilities, and certain costs of defending claims
                  against such Trustees and officers, to the extent such
                  Trustees and officers are not found to have committed conduct
                  constituting conflict of interest, intentional non-compliance
                  with statutes or regulations or dishonest, fraudulent or
                  criminal acts or omissions. The Registrant will purchase an
                  insurance policy to cover such indemnification obligation. The
                  insurance policy also will insure the Registrant against the
                  cost of indemnification payments to Trustees and officers
                  under certain circumstances. Insurance will not be purchased
                  that protects, or purports to protect, any Trustee or officer
                  from liability to which he would otherwise be subject by
                  reason of willful misfeasance, bad faith, gross negligence, or
                  reckless disregard of duty.

                           The Registrant hereby undertakes that it will apply
                  the indemnification provisions of its Declaration of Trust and
                  Bylaws in a manner consistent with Release No. 11330 of the
                  Securities and Exchange Commission under the 1940 Act so long
                  as the interpretation of Section 17(h) and 17(i) of such Act
                  remain in effect and are consistently applied.

Item 28.          Business and Other Connections of Investment Advisers.

   
                  Merrill Lynch Asset Management, L.P. (the "Manager" or "MLAM")
also acts as the investment adviser for the following open-end investment
companies: Merrill Lynch Adjustable Rate Securities Fund, Inc., Merrill Lynch
Americas Income Fund, Inc., Merrill Lynch Asset Builder Program, Inc., Merrill
Lynch Asset Growth Fund, Inc., Merrill Lynch Asset Income Fund, Inc., Merrill
Lynch Capital Fund, Inc., Merrill Lynch Convertible Fund, Inc., Merrill Lynch
Developing Capital Markets Fund, Inc., Merrill Lynch Dragon Fund, Inc., Merrill
Lynch EuroFund, Merrill Lynch Fundamental Growth Fund, Inc., Merrill Lynch Fund
For Tomorrow, Inc., Merrill Lynch Global Allocation Fund, Inc., Merrill Lynch
Global Bond Fund for Investment and Retirement, Merrill Lynch Global Convertible
Fund, Inc., Merrill Lynch Global Growth Fund, Inc., Merrill Lynch Global
Holdings, Merrill Lynch Global Resources Trust, Merrill Lynch Global SmallCap
Fund, Inc., Merrill Lynch Global Utility Fund, Inc., Merrill Lynch Global Value
Fund, Inc., Merrill Lynch Growth Fund, Merrill Lynch Healthcare Fund, Inc.,
Merrill Lynch Intermediate Government Bond Fund, Merrill Lynch International
Equity Fund, Merrill Lynch Latin America Fund, Inc., Merrill Lynch Middle
East/Africa Fund, Inc., Merrill Lynch Municipal Series Trust, Merrill Lynch
Pacific Fund, Inc., Merrill Lynch Ready Assets Trust, Merrill Lynch Real Estate
Fund, Inc., Merrill Lynch Retirement Series Trust, Merrill Lynch Series Fund,
Inc., Merrill Lynch Short-Term Global Income Fund, Inc., Merrill Lynch Strategic
Dividend Fund, Merrill Lynch Technology     



                                      105
<PAGE>
 
   
Fund, Inc., Merrill Lynch U.S.A. Government Reserves, Merrill Lynch U.S.
Treasury Money Fund, Merrill Lynch Utility Income Fund, Inc. and Merrill Lynch
Variable Series Funds, Inc.; and the following closed-end registered investment
companies: Merrill Lynch High Income Municipal Bond Fund, Inc., Merrill Lynch
Municipal Strategy Fund, Inc. and Merrill Lynch Senior Floating Rate Fund, Inc.
Merrill Lynch so acts as sub-adviser to Merrill Lynch World Strategic Portfolio
and Merrill Lynch Basic Value Equity Portfolio, two investment portfolios of EQ
Advisors Trust.    
   
Fund Asset Management, L.P. ("FAM"), an affiliate of MLAM, acts as the
investment adviser for the following open-end registered investment companies:
CBA Money Fund, CMA Government Securities Fund, CMA Money Fund, CMA Multi-State
Municipal Series Trust, CMA Tax-Exempt Fund, CMA Treasury Fund, The Corporate
Fund Accumulation Program, Inc., Financial Institutions Series Trust, Merrill
Lynch Basic Value Fund, Inc., Merrill Lynch California Municipal Series Trust,
Merrill Lynch Corporate Bond Fund, Inc., Merrill Lynch Emerging Tigers Fund,
Inc., Merrill Lynch Federal Securities Trust, Merrill Lynch Funds for
Institutions Series, Merrill Lynch Multi-State Limited Maturity Municipal Series
Trust, Merrill Lynch Multi-State Municipal Series Trust, Merrill Lynch Municipal
Bond Fund, Inc., Merrill Lynch Phoenix Fund, Inc., Merrill Lynch Special Value
Fund, Inc., Merrill Lynch World Income Fund, Inc. and The Municipal Fund
Accumulation Program, Inc.; and the following closed-end investment companies:
Apex Municipal Fund, Inc., Corporate High Yield Fund, Inc., Corporate High Yield
Fund II, Inc., Corporate High Yield Fund III, Inc., Debt Strategies Fund, Inc., 
Debt Strategies Fund II, Inc., Income Opportunities Fund 1999, Inc., Income
Opportunities Fund 2000, Inc., MuniAssets Fund, Inc., MuniEnhanced Fund, Inc.,
MuniInsured Fund, Inc., MuniVest Fund, Inc., MuniVest Fund II, Inc., MuniVest
Florida Fund, MuniVest Michigan Insured Fund, Inc., MuniVest New Jersey Fund,
Inc., MuniVest Pennsylvania Insured Fund, MuniYield Arizona Fund, Inc.,
MuniYield California Fund, Inc., MuniYield California Insured Fund, Inc.,
MuniYield California Insured Fund II, Inc., MuniYield Florida Fund, MuniYield
Florida Insured Fund, MuniYield Fund, Inc., MuniYield Insured Fund, Inc.,
MuniYield Michigan Fund, Inc., MuniYield Michigan Insured Fund, Inc., MuniYield
New Jersey Fund, Inc., MuniYield New Jersey Insured Fund, Inc., MuniYield New
York Insured Fund, Inc., MuniYield New York Insured Fund II, Inc., MuniYield
Pennsylvania Fund, MuniYield Quality Fund, Inc., MuniYield Quality Fund II,
Inc., Muniholdings Fund, Inc., Muniholdings Fund II, Inc., Muniholdings
California Insured Fund, Inc., Muniholdings California Insured Fund II, Inc.,
Muniholdings New York Insured Fund, Inc., Muniholdings New York Fund, Inc.,
Muniholdings Florida Insured Fund, Inc., Muniholdings Florida Insured Fund II,
Muniholdings New Jersey Insured Fund, Inc., Senior High Income Portfolio, Inc.,
and Worldwide DollarVest Fund, Inc.     

        The address of each of these investment companies is P.O. Box 9011,
Princeton, New Jersey 08543-9011, except that the address of Merrill Lynch Funds
for Institutions Series and Merrill Lynch Intermediate Government Bond Fund is
One Financial Center, 23rd Floor, Boston, Massachusetts 02111-2665. The address
of the Manager, FAM, Princeton Services, Inc. ("Princeton Services") and
Princeton Administrators, L.P. ("Princeton Administrators") is also P.O. Box
9011, Princeton, New Jersey 08543-9011. The address of Merrill Lynch Funds
Distributor, Inc. ("MLFD") is P.O. Box 9081, Princeton, New Jersey 08543-9081.
The address of Merrill Lynch, and Merrill Lynch & Co., Inc. ("ML & Co.") is
North Tower World Financial Center, 250 Vesey Street, New York,

                                      106
<PAGE>
 
    
New York 10281-1201. The address of Merrill Lynch Financial Data Services
("FDS") is 4800 Deer Lake Drive East, Jacksonville, Florida 32246-6484.    
   
         Set forth below is a list of each executive officer and partner of the
Manager indicating each business, profession, vocation or employment of a
substantial nature in which each such person or entity has been engaged since
December 1, 1995 for his own account or in the capacity of director, officer,
partner or trustee. In addition, Mr. Zeikel is President and Director or
Trustee, Mr. Glenn is Executive Vice President, and Mr. Richard is Treasurer of
substantially all of the investment companies listed in the first paragraph of
Item 28, and Messrs. Giordano, Harvey, Hewitt, Kirstein and Monagle are
directors, trustees or officers of one or more of such companies.     
   
<TABLE>
<CAPTION>

=================================================================================================================

                                                                                Other Substantial Business,
              Name                    Positions with Manager                      Profession, Vocation or
                                                                                        Employment
- -----------------------------------------------------------------------------------------------------------------
<S>                                <C>                                      <C>
ML&Co............................  Limited Partner                          Financial Services Holding
                                                                            Company; Limited Partner of FAM
- -----------------------------------------------------------------------------------------------------------------
Princeton Services...............  General Partner                          General Partner of FAM
- -----------------------------------------------------------------------------------------------------------------
Arthur Zeikel....................  Chairman                                 Chairman of FAM; 
                                                                            President of MLAM and FAM from 1977
                                                                            to 1997; Chairman and Director of 
                                                                            Princeton Services; and President of 
                                                                            Princeton Services from 1993 to 1997;
                                                                            Executive Vice President of ML & Co.
- -----------------------------------------------------------------------------------------------------------------
Jeffrey M Peek...................  President                                President of FAM;
                                                                            President and Director of Princeton
                                                                            Services; Executive
                                                                            Vice President of ML & Co.
- -----------------------------------------------------------------------------------------------------------------
Terry K. Glenn...................  Executive Vice President and             Executive Vice President of FAM;
                                   Director                                 Executive Vice President and
                                                                            Director of Princeton Services;
                                                                            President and Director of MLFD;
                                                                            President of Princeton
                                                                            Administrators; Director of FDS
- -----------------------------------------------------------------------------------------------------------------
Linda L. Federici................  Senior Vice President                    Senior Vice President of
                                                                            FAM, Senior Vice President of Princeton
                                                                            Services
- -----------------------------------------------------------------------------------------------------------------
Vincent R. Giordano .............  Senior Vice President                    Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services
- -----------------------------------------------------------------------------------------------------------------
Elizabeth A. Griffin ............  Senior Vice President                    Senior Vice President of FAM:
                                                                            Senior Vice President of Princeton
                                                                            Services
- -----------------------------------------------------------------------------------------------------------------
Norman R. Harvey ................  Senior Vice President                    Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services
=================================================================================================================
</TABLE>
    

                                      107
<PAGE>
 
   
<TABLE>
<CAPTION>

=================================================================================================================

                                                                                Other Substantial Business,
              Name                    Positions with Manager                      Profession, Vocation or
                                                                                        Employment
- -----------------------------------------------------------------------------------------------------------------
<S>                                <C>                                      <C>
Michael J. Hennewinkel...........  Senior Vice President                    Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services
- -----------------------------------------------------------------------------------------------------------------
N. John Hewitt...................  Senior Vice President                    Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services
- -----------------------------------------------------------------------------------------------------------------
Philip L. Kirstein ..............  Senior Vice President,                   Senior Vice President, General
                                   General  Counsel, Secretary              Counsel and Secretary of FAM;
                                   and Director                             Senior Vice President, General
                                                                            Counsel, Director and Secretary of
                                                                            Princeton Services; 
- -----------------------------------------------------------------------------------------------------------------
Ronald M. Kloss .................  Senior Vice President and                Senior Vice President 
                                   Controller                               of FAM; Senior Vice President of
                                                                            Princeton Services
- -----------------------------------------------------------------------------------------------------------------
Debra W. Landsman-Yaros..........  Senior Vice President                    Senior Vice President of FAM;
                                                                            Vice President of MLFD; Senior Vice       
                                                                            President of Princeton Services
- -----------------------------------------------------------------------------------------------------------------
Stephen M.M. Miller.............  Senior Vice President                     Executive Vice President of
                                                                            Princeton Administrators; Senior
                                                                            Vice President of Princeton
                                                                            Services
- -----------------------------------------------------------------------------------------------------------------
Joseph T. Monagle................   Senior Vice President                   Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services
- -----------------------------------------------------------------------------------------------------------------
Michael J. Quinn.................  Senior Vice President                    Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services; Managing Director and
                                                                            First Vice President of Merrill,
                                                                            Lynch, Pierce, Fenner & Smith
                                                                            Incorporated
- -----------------------------------------------------------------------------------------------------------------
Richard L. Reller................  Senior Vice President                    Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services; Director of MLFD
=================================================================================================================
</TABLE>
    


 
                                      108
<PAGE>
 
   
<TABLE>
<CAPTION>
=================================================================================================================

                                                                                Other Substantial Business,
              Name                    Positions with Manager                      Profession, Vocation or
                                                                                        Employment
- -----------------------------------------------------------------------------------------------------------------
<S>                                <C>                                      <C>

- -----------------------------------------------------------------------------------------------------------------
Gerald M. Richard ...............  Senior Vice President and                Senior Vice President and
                                   Treasurer                                Treasurer of FAM; Senior Vice
                                                                            President and Treasurer of
                                                                            Princeton Services; Vice President
                                                                            and Treasurer of MLFD
- -----------------------------------------------------------------------------------------------------------------
Gregory D. Upah .................  Senior Vice President                    Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services
- -----------------------------------------------------------------------------------------------------------------
Ronald L. Welburn ...............  Senior Vice President                    Senior Vice President of FAM;
                                                                            Senior Vice President of Princeton
                                                                            Services
=================================================================================================================
</TABLE>
    

   
         (b) Merrill Lynch Asset Management U.K. Limited ("MLAM U.K.") acts as
sub-adviser for the following registered investment companies: (b) Merrill Lynch
Asset Management U.K. Limited ("MLAM U.K.") acts as a sub-adviser for the
following registered investment companies: Corporate High Yield Fund, Inc.,
Corporate High Yield Fund II, Inc., Corporate High Yield Fund III, Inc., Income
Opportunities Fund 1999, Inc., Income Opportunities Fund 2000, Inc., Merrill
Lynch Americas Income Fund, Inc., Merrill Lynch Asset Builder Program, Inc.,
Merrill Lynch Asset Growth Fund, Inc., Merrill Lynch Asset Income Fund, Inc.,
Merrill Lynch Basic Value Fund, Inc., Merrill Lynch Capital Fund, Inc., Merrill
Lynch Consults International Portfolio, Merrill Lynch Convertible Fund, Inc.,
Merrill Lynch Corporate Bond Fund, Inc., Merrill Lynch Developing Capital
Markets, Inc., Merrill Lynch Dragon Fund, Inc., Merrill Lynch Emerging Tigers
Fund, Inc., Merrill Lynch EuroFund, Merrill Lynch Fundamental Growth Fund Inc.,
Merrill Lynch Fund For Tomorrow, Inc., Merrill Lynch Global Allocation Fund,
Inc., Merrill Lynch Global Bond Fund for Investment and Retirement, Merrill
Lynch Global Convertible Fund, Inc., Merrill Lynch Global Growth Fund, Inc.,
Merrill Lynch Global Holdings, Inc., Merrill Lynch Global Resources Trust,
Merrill Lynch Global SmallCap Fund, Inc., Merrill Lynch Global Utility Fund,
Inc., Merrill Lynch Global Value Fund, Inc., Merrill Lynch Growth Fund, Merrill
Lynch Healthcare Fund, Inc., Merrill Lynch International Equity Fund, Merrill
Lynch Latin America Fund, Inc., Merrill Lynch Middle East/Africa Fund, Inc.,
Merrill Lynch Pacific Fund, Inc., Merrill Lynch Phoenix Fund, Inc., Merrill
Lynch Real Estate Fund, Inc., Merrill Lynch Series Fund, Inc., Merrill Lynch
Short-Term Global Income Fund, Inc., Merrill Lynch Special Value Fund, Inc.,
Merrill Lynch Strategic Dividend Fund, Merrill Lynch Technology Fund, Inc.,
Merrill Lynch Utility Income Fund, Inc., Merrill Lynch Variable Series Funds,
Inc., Merrill Lynch World Income Fund, Inc. and Worldwide DollarVest Fund, Inc.
The address of each of these registered investment companies is P.O. Box 9011,
Princeton, New Jersey 08543-9011. The Address of MLAM U.K. is Milton Gate, 1
Moor Lane, London ECZY 9HA, England.    
   
         Set forth below is a list of each executive officer and director of
MLAM U.K. indicating each business, profession, vocation or employment of a
substantial nature in which each person has been engaged since October 31, 1995,
for his or her own account or in the capacity of director, officer, partner or
trustee. In addition, Messrs. Zeikel, Albert, and Richard are officers of one or
more of the registered investment companies listed in the first two paragraphs
of this Item 28:     

   
<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------------------------------
                  Name                    Position with MLAM U.K.                     Other Substantial Business,
                                                                                        Profession, Vocation or
                                                                                              Employment
- -----------------------------------------------------------------------------------------------------------------------
<S>                                       <C>                                       <C>
Arthur Zeikel..........................   Director and Chairman                     Chairman of the Manager and FAM;
                                                                                    President of the Manager and FAM from 1977 to
                                                                                    1997; Chairman and Director of Princeton
                                                                                    Services; President of Princeton Services from
                                                                                    1993 to 1997; Executive Vice President of ML &
                                                                                    Co.
- -----------------------------------------------------------------------------------------------------------------------
</TABLE>
    


                                      109
<PAGE>
 
   
<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------------------------------
<S>                                       <C>                                       <C>
Alan J. Albert.........................   Senior Managing Director                  Vice President of the Manager
- -----------------------------------------------------------------------------------------------------------------------
Nicholas C. D. Hall ...................   Director                                  Director of Merrill Lynch           
                                                                                    Europe PLC; General                 
                                                                                    Counsel of Merrill Lynch            
                                                                                    International Private Banking Group  
- -----------------------------------------------------------------------------------------------------------------------
Gerald M. Richard......................   Senior Vice President                     Senior Vice President and
                                                                                    Treasurer of the Manager and
                                                                                    FAM; Senior Vice President
                                                                                    and Treasurer of Princeton
                                                                                    Services; Vice President and
                                                                                    Treasurer of MLFD
- -----------------------------------------------------------------------------------------------------------------------
Carol Ann Langham......................   Company Secretary                         None
- -----------------------------------------------------------------------------------------------------------------------
Debra Anne Searle......................   Assistant Company Secretary               None
- -----------------------------------------------------------------------------------------------------------------------
</TABLE>
    


                                      110
<PAGE>
 
ITEM 29.          PRINCIPAL UNDERWRITERS.

   
(a) MLFD acts as the principal underwriter for the Registrant, placement agent
for Merrill Lynch Index Trust and as principal underwriter for each of the
open-end investment companies referred to in the first two paragraphs of Item 28
except CBA Money Fund, CMA Government Securities Fund, CMA Money Fund, CMA
Multi-State Municipal Series Trust, CMA Tax-Exempt Fund, CMA Treasury Fund, The
Corporate Fund Accumulation Program, Inc. and The Municipal Fund Accumulation
Program, Inc., and MLFD also acts as principal underwriter for the following
closed-end funds: Merrill Lynch High Income Municipal Bond Fund, Inc., Merrill
Lynch Senior Floating Rate Fund, Inc. and Merrill Lynch Municipal Strategy Fund,
Inc.    

   
(b) Set forth below is information concerning each director and officer of MLFD.
The principal business address of each such person is Box 9081, Princeton, New
Jersey 08543-9081, except that the address of Messrs. Aldrich, Breen, Crook,
Fatseas and Wasel is One Financial Center, 23rd Floor, Boston, Massachusetts
02111-2665.     

   
<TABLE>
<CAPTION>

=====================================================================================================================
                 (1)                                        (2)                                      (3)
                                                   Positions and Offices                    Positions and Offices
                Name                               with the Distributor                        with Registrant
- ---------------------------------------------------------------------------------------------------------------------
<S>                                   <C>                                                        <C>   
Terry K. Glenn....................... President and Director                                      President
- ---------------------------------------------------------------------------------------------------------------------
Richard L. Reller.................... Director                                                      None
- ---------------------------------------------------------------------------------------------------------------------
Thomas Verage........................ Director                                                      None
- ---------------------------------------------------------------------------------------------------------------------
William E. Aldrich .................. Senior Vice President                                         None
- ---------------------------------------------------------------------------------------------------------------------
Robert W. Crook ..................... Senior Vice President                                         None
- ---------------------------------------------------------------------------------------------------------------------
Michael G. Clark .................... Vice President                                                None
- ---------------------------------------------------------------------------------------------------------------------
Michael J. Brady .................... Vice President                                                None
- ---------------------------------------------------------------------------------------------------------------------
William M. Breen .................... Vice President                                                None
- ---------------------------------------------------------------------------------------------------------------------
James T. Fatseas .................... Vice President                                                None
- ---------------------------------------------------------------------------------------------------------------------
Debra W. Landsman-Yaros.............. Vice President                                                None
- ---------------------------------------------------------------------------------------------------------------------
Michelle T. Lau ..................... Vice President                                                None
- ---------------------------------------------------------------------------------------------------------------------
Gerald M. Richard.................... Vice President and Treasurer                                Treasurer
- ---------------------------------------------------------------------------------------------------------------------
Salvatore Venezia.................... Vice President                                                None
- ---------------------------------------------------------------------------------------------------------------------
William Wasel........................ Vice President                                                None
- ---------------------------------------------------------------------------------------------------------------------
Robert Harris ....................... Secretary                                                   Secretary
=====================================================================================================================
</TABLE>
    



                                      111
<PAGE>
 
Item 30.          Location of Accounts and Records.
    
                  All accounts, books and other documents required to be
maintained by Section 31(a) of the 1940 Act, as amended, and the rules
thereunder are maintained at the offices of the Registrant, 800 Scudders Mill
Road, Plainsboro, New Jersey 08536, and its Transfer Agent, MLFDS, 4800 Deer
Lake Drive East, Jacksonville, Florida 32246-6484.     

Item 31.          Management Services.

   
                  Other than as set forth under the caption "Management of the
Trust" in Part A of the Registration Statement and under "Management of the
Trust" in Part B of the Registration Statement, the Registrant is not party to
any Management-related service contract.
    

Item 32.          Undertakings

                  None.

 
                                      112
<PAGE>
 
                                   SIGNATURES

   
         Pursuant to the requirements of the Investment Company Act of 1940, the
Registrant certifies that it has duly caused this Amendment to the Registration
Statement to be signed on its behalf by the undersigned, thereunto duly
authorized, in the Township of Plainsboro, and State of New Jersey, on the 31st 
day of March, 1998.     


                                         MERRILL LYNCH INDEX TRUST
                                              (Registrant)

   
                                         By:      /s/ Terry K. Glenn
                                              ---------------------------------
                                                  (Terry K. Glenn, President)
    

 
                                      113
<PAGE>
 
   
<TABLE>
<CAPTION>

                     Exhibit
                     Number          Description
                     ------          -----------
                     <S>             <C>
    
                     11              Accountant's Consent
     
                     17(a)           Financial Data Schedules for S&P 500 Index Series
                     17(b)           Financial Data Schedule for Small Cap Index Series
                     17(c)           Financial Data Schedule for Aggregate Bond Index Series
                     17(d)           Financial Data Schedule for International Index Series
     
</TABLE>
    



                                      114

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 01
   <NAME> MERRILL LYNCH S&P 500 INDEX SERIES
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             APR-03-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                        554297300
<INVESTMENTS-AT-VALUE>                       600218534
<RECEIVABLES>                                  3658746
<ASSETS-OTHER>                                   63997
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                               603941277
<PAYABLE-FOR-SECURITIES>                        148701
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       992075
<TOTAL-LIABILITIES>                            1140776
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     556749626
<SHARES-COMMON-STOCK>                                0
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                      46050875
<NET-ASSETS>                                 602800501
<DIVIDEND-INCOME>                              4811633
<INTEREST-INCOME>                              1457105
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (345174)
<NET-INVESTMENT-INCOME>                        5923564
<REALIZED-GAINS-CURRENT>                      20857044
<APPREC-INCREASE-CURRENT>                     46050875
<NET-CHANGE-FROM-OPS>                         72831483
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                       602800501
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                           148645
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 493819
<AVERAGE-NET-ASSETS>                         398936993
<PER-SHARE-NAV-BEGIN>                                0
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                                  0
<EXPENSE-RATIO>                                    .17
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 02
   <NAME> MERRILL LYNCH SMALL CAP INDEX SERIES
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             APR-09-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                         87136054
<INVESTMENTS-AT-VALUE>                        94701755
<RECEIVABLES>                                  1424789
<ASSETS-OTHER>                                  356540
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                                96483084
<PAYABLE-FOR-SECURITIES>                        288292
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       449683
<TOTAL-LIABILITIES>                             737975
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                      87980250
<SHARES-COMMON-STOCK>                                0
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       7764859
<NET-ASSETS>                                  95745109
<DIVIDEND-INCOME>                               571104
<INTEREST-INCOME>                               321624
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 (83593)
<NET-INVESTMENT-INCOME>                         809135
<REALIZED-GAINS-CURRENT>                       1553214
<APPREC-INCREASE-CURRENT>                      7764859
<NET-CHANGE-FROM-OPS>                         10127208
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                        95745109
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            36425
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 130960
<AVERAGE-NET-ASSETS>                          62530490
<PER-SHARE-NAV-BEGIN>                                0
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                                  0
<EXPENSE-RATIO>                                    .29
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 03
   <NAME> MERRILL LYNCH AGGREGATE BOND INDEX SERIES
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             APR-03-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                        308640668
<INVESTMENTS-AT-VALUE>                       315982060
<RECEIVABLES>                                  4061188
<ASSETS-OTHER>                                  114612
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                               320157860
<PAYABLE-FOR-SECURITIES>                      12133853
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       283610
<TOTAL-LIABILITIES>                           12417463
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                     300399005
<SHARES-COMMON-STOCK>                                0
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       7341392
<NET-ASSETS>                                 307740397
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              9531892
<OTHER-INCOME>                                   54707
<EXPENSES-NET>                                (223684)
<NET-INVESTMENT-INCOME>                        9362915
<REALIZED-GAINS-CURRENT>                        870626
<APPREC-INCREASE-CURRENT>                      7341392
<NET-CHANGE-FROM-OPS>                         17574933
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                            0
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                              0
<NUMBER-OF-SHARES-REDEEMED>                          0
<SHARES-REINVESTED>                                  0
<NET-CHANGE-IN-ASSETS>                       307740397
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                            88609
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 266669
<AVERAGE-NET-ASSETS>                         197449080
<PER-SHARE-NAV-BEGIN>                                0
<PER-SHARE-NII>                                      0
<PER-SHARE-GAIN-APPREC>                              0
<PER-SHARE-DIVIDEND>                                 0
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                                  0
<EXPENSE-RATIO>                                    .18
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<PAGE>
 
<ARTICLE> 6
<SERIES>
   <NUMBER> 04
   <NAME> MERRILL LYNCH INTERNATIONAL INDEX SERIES
       
<S>                             <C>
<PERIOD-TYPE>                   OTHER
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             APR-09-1997
<PERIOD-END>                               DEC-31-1997
<INVESTMENTS-AT-COST>                        141360565
<INVESTMENTS-AT-VALUE>                       141770411
<RECEIVABLES>                                  1122209
<ASSETS-OTHER>                                 1431558
<OTHER-ITEMS-ASSETS>                                 0
<TOTAL-ASSETS>                               144324178
<PAYABLE-FOR-SECURITIES>                             0
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</TABLE>

<PAGE>
                                                                   EXHIBIT 99.11
 
INDEPENDENT AUDITORS' CONSENT


Merrill Lynch Index Trust:

We consent to the use in Amendment No. 2 to Registration Statement No. 811-7885 
of our reports dated February 10, 1998 and February 18, 1998 appearing in the 
Statement of Additional Information, which is a part of such Registration 
Statement.


/s/ Deloitte & Touche LLP
Deloitte & Touche LLP
Princeton, New Jersey
March 31, 1998








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