MERRILL LYNCH & CO INC
8-K, 1996-07-09
SECURITY BROKERS, DEALERS & FLOTATION COMPANIES
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<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549



                                   FORM 8-K


                                 CURRENT REPORT



                       Pursuant to Section 13 or 15(d) of
                      the Securities Exchange Act of 1934



Date of Report (Date of earliest event reported): July 9, 1996
                                                  ------------


                            Merrill Lynch & Co., Inc.
                       -------------------------------------
            (Exact name of Registrant as specified in its charter)

 
 
   Delaware                        1-7182                      13-2740599
- --------------------------------------------------------------------------------
(State or other                (Commission                 (I.R.S. Employer
jurisdiction of                File Number)                Identification No.)
incorporation)


World Financial Center, North Tower, New York, New York            10281-1220
- --------------------------------------------------------------------------------
        (Address of principal executive offices)                   (Zip Code)



 Registrant's telephone number, including area code: (212) 449-1000
                                                     --------------



- --------------------------------------------------------------------------------
         (Former name or former address, if changed since last report)
<PAGE>
 
Item 5.   Other Events
- -------   -------------

     Exhibits are filed herewith in connection with Post-Effective Amendment No.
1 to the Registration Statement on Form S-3 (File No. 33-65135) filed by Merrill
Lynch & Co., Inc. (the "Company") with the Securities and Exchange Commission
covering Senior Debt Securities, Subordinated Debt Securities and Warrants
issuable under an indenture dated as of April 1, 1983 and restated as of April
1, 1987, as amended and supplemented as of July 1, 1996, by the Tenth
Supplemental Indenture, between the Company and Chemical Bank (successor by
merger to Manufacturers Hanover Trust Company) (collectively, the "Indenture").
The Company will offer 6,510,286 6 1/4% STRYPES Due July 1, 2001 Payable with
Shares of Common Stock of IMC Global Inc. ("STRYPES"). The exhibits consist of
the form of Underwriting Agreement, Registration Agreement, Indenture, STRYPES
Certificate and Purchase Agreement relating thereto.


Item 7.   Financial Statements, Pro Forma Financial Information and Exhibits
- -------   ------------------------------------------------------------------


                             EXHIBITS


 1(a)  -  Underwriting Agreement among the Company, GVI Holdings, Inc. and
          the Underwriter.

 1(b)  -  Registration Agreement among the Company, GVI Holdings, Inc., IMC
          Global Inc. and the Underwriter.

 4(a)  -  Senior Indenture, dated as of April 1, 1983, as amended and restated,
          between the Company and Chemical Bank (successor by merger to
          Manufacturers Hanover Trust Company), incorporated herein by reference
          to Exhibit 99(c) to Registrant's Registration Statement on Form 8-A
          dated July 20, 1992.

 4(b)  -  Tenth Supplemental Indenture to the Senior Indenture between the
          Company and Chemical Bank (successor by merger to Manufacturers
          Hanover Trust Company).

 4(c)  -  Certificate representing the STRYPES.

 10    -  Purchase Agreement among the Company, Merrill Lynch Capital Inc. and
          GVI Holdings, Inc. relating to shares of IMC Common Stock.

                                       2
<PAGE>
 
                                   SIGNATURE


     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned, thereto duly authorized.

                                   MERRILL LYNCH & CO., INC.
                                 ------------------------------
                                       (Registrant)



                               By: /s/ Theresa Lang
                                   -------------------------------
                                       Theresa Lang
                                        Treasurer



Date:  July 9, 1996

                                       3
<PAGE>
 
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549



                           MERRILL LYNCH & CO., INC.



                         EXHIBITS TO CURRENT REPORT ON
                         FORM 8-K DATED JULY 9, 1996



                                                   Commission File Number 1-7182
<PAGE>
 
                                 EXHIBIT INDEX
<TABLE> 
<CAPTION> 
Exhibit
Number                                                                          Page
- ------                                                                          ----
<C>       <S>                                                                   <C> 
 1(a)  -  Underwriting Agreement among the Company,
          GVI Holdings, Inc. and the Underwriter.

 1(b)  -  Registration Agreement among the Company, GVI Holdings, Inc.,
          IMC Global Inc. and the Underwriter.

 4(a)  -  Senior Indenture, dated as of April 1, 1983, as
          amended and restated, between the Company and
          Chemical Bank (successor by merger to Manufacturers Hanover Trust
          Company), incorporated herein by reference to Exhibit 99(c) to
          Registrant's Registration Statement on Form 8-A dated July 20, 1992.

 4(b)  -  Tenth Supplemental Indenture to the Senior Indenture between the
          Company and Chemical Bank (successor by merger to Manufacturers
          Hanover Trust Company).

 4(c)  -  Certificate representing the STRYPES.

 10    -  Purchase Agreement among the Company, Merrill Lynch Mortgage Capital 
          Inc. and GVI Holdings, Inc. relating to shares of IMC Common Stock.
</TABLE> 

<PAGE>
                                                                    EXHIBIT 1(a)
 ______________________________________________________________________________
 ______________________________________________________________________________



                           MERRILL LYNCH & CO., INC.

                            (a Delaware corporation)



                             UNDERWRITING AGREEMENT
                             ----------------------



                              Dated:  July 2, 1996


 ______________________________________________________________________________
 ______________________________________________________________________________
<PAGE>
 

                               TABLE OF CONTENTS

<TABLE>
<S>            <C>                                                               <C>
SECTION 1.     Representations and Warranties.................................     4
 (a)           Representations and Warranties by the Company..................     4
               (i)      Compliance with Registration Requirements.............     4
               (ii)     Incorporated Documents................................     5
               (iii)    Independent Accountants...............................     5
               (iv)     Financial Statements..................................     6
               (v)      No Material Adverse Change in Business................     6
               (vi)     Good Standing of the Company..........................     6
               (vii)    Good Standing of Subsidiaries.........................     6
               (viii)   Authorization of Agreement............................     7
               (ix)     Authorization of the Indenture........................     7
               (x)      Authorization of the Securities.......................     7
               (xi)     Authorization of the Purchase Agreement...............     7
               (xii)    Description of Securities, Indenture and
                        Purchase Agreement....................................     8
               (xiii)   Absence of Defaults and Conflicts.....................     8
               (xiv)    Absence of Labor Dispute..............................     9
               (xv)     Absence of Proceedings................................     9
               (xvi)    Exhibits..............................................     9
               (xvii)   Possession of Intellectual Property...................     9
               (xviii)  Absence of Further Requirements.......................    10
               (xix)    Possession of Licenses and Permits....................    10
               (xx)     Title to Property.....................................    10
               (xxi)    Compliance with Cuba Act..............................    11
 (b)           Representations and Warranties by GVI..........................    11
               (i)      Good Standing of GVI..................................    11
               (ii)     Delivery of IMC Common Stock..........................    11
               (iii)    Authorization of Agreement............................    11
               (iv)     Authorization of the Purchase Agreement...............    11
               (v)      Absence of Defaults and Conflicts.....................    12
               (vi)     Absence of Further Requirements.......................    12
               (vii)    IMC Registration Statement and Prospectus.............    13
 (c)           Officer's Certificates.........................................    13
SECTION 2.     Sale and Delivery to Underwriter; Closing......................    13
 (a)           Initial Securities.............................................    13
 (b)           Option Securities..............................................    13
 (c)           Payment........................................................    14
 (d)           Denominations; Registration....................................    14
SECTION 3.     Covenants......................................................    14
 (a)           Covenants of the Company.......................................    14
               (i)   Compliance with Securities Regulations and Commission
                     Requests.................................................    14
               (ii)  Filing of Amendments.....................................    15
</TABLE>

                                       i
<PAGE>
 
<TABLE>
<S>          <C>                                                                 <C>
              (iii)   Delivery of ML&Co. Registration Statements...............   15
              (iv)    Delivery of ML&Co. Prospectuses..........................   15
              (v)     Continued Compliance with Securities Laws................   15
              (vi)    Blue Sky Qualifications..................................   16
              (vii)   Rule 158.................................................   16
              (viii)  Use of Proceeds..........................................   16
              (ix)    Listing..................................................   16
              (x)     Reporting Requirements...................................   16
 (b)          Covenants of GVI.................................................   17
              (i)     Restriction on Sale of Securities........................   17
              (ii)    Purpose Statement........................................   17
SECTION 4.    Payment of Expenses..............................................   17
 (a)          Expenses Payable by the Company..................................   17
 (c)          Termination of Agreement.........................................   18
SECTION 5.    Conditions.......................................................   18
 (a)          Conditions of Underwriter's Obligations..........................   18
              (1)     Effectiveness of ML&Co. Registration Statement...........   18
              (2)     Effectiveness of IMC Registration Statement..............   18
              (3)     Opinion of Counsel for the Company.......................   18
              (4)     Opinion of Counsel for IMC...............................   18
              (5)     Opinion of Counsel for GVI...............................   19
              (6)     Company Officers' Certificate............................   19
              (7)     IMC Officers' Certificate................................   19
              (8)     GVI Officer's Certificate................................   19
              (9)     Company Accountant's Comfort Letter......................   20
              (10)    IMC Accountant's Comfort Letter..........................   20
              (11)    Company Bring-down Comfort Letter........................   20
              (12)    IMC Bring-down Comfort Letter............................   20
              (13)    Maintenance of Rating....................................   20
              (14)    Approval of Listing......................................   20
              (15)    No Objection.............................................   20
              (16)    Lock-up Agreements.......................................   21
              (17)    Conditions to Purchase of Option Securities..............   21
              (18)    Additional Documents.....................................   22
 (b)          Conditions of the Company's Obligations..........................   22
              (1)     Effectiveness of IMC Registration Statement..............   22
              (2)     Opinion of Counsel for the Company.......................   22
              (3)     Opinion of Counsel for IMC...............................   23
              (4)     Opinion of Counsel for GVI...............................   23
              (5)     IMC Officers' Certificate................................   23
              (6)     GVI Officer's Certificate................................   23
              (7)     IMC Accountant's Comfort Letters.........................   23
              (8)     IMC Bring-down Comfort Letter............................   23
              (9)     Conditions to Sale of Option Securities..................   23
 (c)          Termination of Agreement.........................................   24
</TABLE>

                                       ii
<PAGE>
<TABLE>
<S>           <C>                                                                <C>
SECTION 6.    Indemnification..................................................   24
     (a)      Indemnification of the Underwriter by the Company................   24
     (b)      Indemnification of the Underwriter and the Company by GVI........   25
     (c)      Indemnification of the Company, Directors and Officers...........   26
     (d)      Actions against Parties; Notification............................   27
     (e)      Settlement without Consent if Failure to Reimburse...............   27
SECTION 7.    Contribution.....................................................   27
SECTION 8.    Representations, Warranties and Agreements to
              Survive Delivery.................................................   30
SECTION 9.    Termination of Agreement.........................................   30
     (a)      Termination; General.............................................   30
     (b)      Liabilities......................................................   30
SECTION 10.   Notices..........................................................   31
SECTION 11.   Parties..........................................................   31
SECTION 12.   GOVERNING LAW AND TIME...........................................   31
SECTION 13.   Effect of Headings...............................................   31
</TABLE>

                                      iii
<PAGE>
 
                           MERRILL LYNCH & CO., INC.
                            (a Delaware corporation)

                      6 1/4% STRYPES/SM/ DUE JULY 1, 2001

             Payable with Shares of Common Stock of IMC Global Inc.


                             UNDERWRITING AGREEMENT
                             ----------------------

                                                         July 2, 1996
Merrill Lynch & Co.
Merrill Lynch, Pierce, Fenner & Smith
            Incorporated
World Financial Center
North Tower
New York, New York  10281-1209

Ladies and Gentlemen:

     Merrill Lynch & Co., Inc., a Delaware corporation (the "Company"), and GVI
Holdings, Inc., a Delaware corporation ("GVI"), confirm their respective
agreements with Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith
Incorporated (the "Underwriter") with respect to the issue and sale by the
Company and the purchase by the Underwriter of an aggregate of 5,661,119 of the
Company's Structured Yield Product Exchangeable for Stock/SM/, 6 1/4%
STRYPES/SM/ Due July 1, 2001 (each, a "STRYPES") and with respect to the grant
by the Company to the Underwriter of the option described in Section 2(b) hereof
to purchase all or any part of 849,167 additional STRYPES to cover over-
allotments, if any.  The aforesaid 5,661,119 STRYPES (the "Initial Securities")
to be purchased by the Underwriter and all or any part of the 849,167 STRYPES
subject to the option described in Section 2(b) hereof (the "Option Securities")
are hereinafter called, collectively, the "Securities."  The Securities are to
be issued pursuant to an indenture, dated as of April 1, 1983 and restated as of
April 1, 1987 (as amended and supplemented, the "Principal Indenture"), between
the Company and Chemical Bank (successor by merger to Manufacturers Hanover
Trust Company), as trustee (the "Trustee"), as further amended and supplemented
by the Tenth Supplemental Indenture, dated as of July 1, 1996 (the "Supplemental
Indenture"), between the Company and the Trustee, relating to the STRYPES.  The
Principal Indenture, as amended and supplemented by the Supplemental Indenture,
is hereinafter referred to as the "Indenture".

__________________________
/SM/  Service mark of Merrill Lynch & Co., Inc.

                                       1
<PAGE>
 
     The STRYPES will be payable at maturity by delivery of the Maturity
Consideration (as defined in the Supplemental Indenture), subject to the
Company's option to deliver cash with an equal value.  The Company, IMC and the
Underwriter are concurrently entering into an agreement dated the date hereof
(the "Registration Agreement") relating to the registration of shares of common
stock, par value $1.00 per share (the "IMC Common Stock"), of IMC Global Inc., a
Delaware corporation ("IMC"), that may be deliverable by the Company pursuant to
the STRYPES.

     The Company understands that the Underwriter proposes to make a public
offering of the Securities as soon as the Underwriter deems advisable after this
Agreement has been executed and delivered.

     The Company has filed with the Securities and Exchange Commission (the
"Commission") a registration statement on Form S-3 (No. 33-65135) for the
registration of debt securities, including the Securities, and warrants under
the Securities Act of 1933, as amended (the "1933 Act"), and the offering
thereof from time to time in accordance with Rule 415 of the rules and
regulations of the Commission under the 1933 Act (the "1933 Act Regulations"),
and the Company has filed post-effective amendment no. 3 and post-effective
amendment no. 5 thereto, including a preliminary prospectus and preliminary
prospectus supplement relating to the offering of the Securities.  Promptly
after execution and delivery of this Agreement, the Company will either (i)
prepare and file a prospectus and prospectus supplement in accordance with the
provisions of Rule 430A ("Rule 430A") of the 1933 Act Regulations and paragraph
(b) of Rule 424 ("Rule 424(b)") of the 1933 Act Regulations or (ii) if the
Company has elected to rely upon Rule 434 ("Rule 434") of the 1933 Act
Regulations, prepare and file a term sheet (an "ML&Co. Term Sheet") in
accordance with the provisions of Rule 434 and Rule 424(b).  The information
included in such prospectus and prospectus supplement or in such ML&Co. Term
Sheet, as the case may be, that was omitted from such registration statement (as
so amended) at the time it became effective but that is deemed to be part of
such registration statement (as so amended) at the time it became effective (i)
pursuant to paragraph (b) of Rule 430A is referred to as "Rule 430A Information"
or (ii) pursuant to paragraph (d) of Rule 434 is referred to as "Rule 434
Information."  Any prospectus and prospectus supplement relating to the offering
of the Securities used before such registration statement (as so amended) became
effective, and any prospectus and prospectus supplement relating to the offering
of the Securities that omitted, as applicable, the Rule 430A Information or the
Rule 434 Information, that was used after such effectiveness and prior to the
execution and delivery of this Agreement, in each case excluding any IMC
preliminary prospectus (as defined below) attached thereto, are herein called,
collectively, an "ML&Co. preliminary prospectus."  Such registration statement
(as so amended), including the exhibits thereto, the schedules thereto, if any,
and the documents incorporated by reference therein pursuant to Item 12 of Form
S-3 under the 1933 Act, at the time it became effective and including the Rule
430A Information and the Rule 434 Information, as applicable, is herein called
the "ML&Co. Registration Statement."  Any registration statement filed by the
Company pursuant to Rule 462(b) of the 1933 Act Regulations is herein referred
to as the "ML&Co. Rule 462(b) Registration Statement," and after such filing the
term "ML&Co. Registration Statement" shall include the ML&Co. Rule 462(b)
Registration Statement.  The final prospectus and final prospectus supplement
relating to the offering of the Securities,

                                       2
<PAGE>
 
including the documents incorporated by reference therein pursuant to Item 12 of
Form S-3 under the 1933 Act, but excluding any IMC Prospectus (as defined below)
attached thereto, in the form first furnished to the Underwriter for use in
connection with the offering of the Securities are collectively referred to
herein as the "ML&Co. Prospectus."  If Rule 434 is relied on, the term "ML&Co.
Prospectus" shall refer to the ML&Co. preliminary prospectus dated   June 20,
1996 together with the ML&Co. Term Sheet and all references in this Agreement to
the date of the ML&Co. Prospectus shall mean the date of the ML&Co. Term Sheet.
For purposes of this Agreement, all references to the ML&Co. Registration
Statement, any ML&Co. preliminary prospectus, the ML&Co. Prospectus or any
ML&Co. Term Sheet or any amendment or supplement to any of the foregoing shall
be deemed to include the copy filed with the Commission pursuant to its
Electronic Data Gathering, Analysis and Retrieval system ("EDGAR").

     All references in this Agreement to financial statements and schedules and
other information which is "contained," "included" or "stated" in the ML&Co.
Registration Statement, any ML&Co. preliminary prospectus or the ML&Co.
Prospectus (or other references of like import) shall be deemed to mean and
include all such financial statements and schedules and other information which
is incorporated by reference in the ML&Co. Registration Statement, any ML&Co.
preliminary prospectus or the ML&Co. Prospectus, as the case may be, and shall
be deemed to exclude all financial statements and schedules and other
information which is included or incorporated by reference in any IMC
preliminary prospectus or the IMC Prospectus which is attached to any ML&Co.
preliminary prospectus or the ML&Co. Prospectus; and all references in this
Agreement to amendments or supplements to the ML&Co. Registration Statement, any
ML&Co. preliminary prospectus or the ML&Co. Prospectus shall be deemed to mean
and include the filing of any document under the Securities Exchange Act of
1934, as amended (the "1934 Act"), which is incorporated by reference in the
ML&Co. Registration Statement, such ML&Co. preliminary prospectus or the ML&Co.
Prospectus, as the case may be.

     IMC has filed with the Commission a registration statement on Form S-3 (No.
333-04831) covering the registration of the shares of IMC Common Stock
deliverable at maturity of the Securities under the 1933 Act, including the
related preliminary prospectus or prospectuses.  Each prospectus used before
such registration statement became effective is herein called an "IMC
preliminary prospectus."  Such registration statement, including the exhibits
thereto, the schedules thereto, if any, and the documents incorporated by
reference therein pursuant to Item 12 of Form S-3 under the 1933 Act, at the
time it became effective, is herein called the "IMC Registration Statement."
Any registration statement filed by IMC pursuant to Rule 462(b) of the 1933 Act
Regulations is herein referred to as the "IMC Rule 462(b) Registration
Statement," and after such filing the term "IMC Registration Statement" shall
include the IMC Rule 462(b) Registration Statement.  The final prospectus,
including the documents incorporated by reference therein pursuant to Item 12 of
Form S-3 under the 1933 Act, in the form first furnished to the Underwriter for
use in connection with the offering of the Securities is herein called the "IMC
Prospectus."  For purposes of this Agreement, all references to the IMC
Registration Statement, any IMC preliminary prospectus, the IMC Prospectus or
any amendment or supplement to any of the foregoing shall be deemed to include
the copy filed with the Commission pursuant to EDGAR.

                                       3
<PAGE>
 
     All references in this Agreement to financial statements and schedules and
other information which is "contained," "included" or "stated" in the IMC
Registration Statement, any IMC preliminary prospectus or the IMC Prospectus (or
other references of like import) shall be deemed to mean and include all such
financial statements and schedules and other information which is incorporated
by reference in the IMC Registration Statement, any IMC preliminary prospectus
or the IMC Prospectus, as the case may be; and all references in this Agreement
to amendments or supplements to the IMC Registration Statement, any IMC
preliminary prospectus or the IMC Prospectus shall be deemed to mean and include
the filing of any document under the 1934 Act which is incorporated by reference
in the IMC Registration Statement, such IMC preliminary prospectus or the IMC
Prospectus, as the case may be.

     Prior to the closing under this Agreement, the Company, Merrill Lynch
Mortgage Capital Inc., a wholly-owned subsidiary of the Company (the "ML&Co.
Subsidiary"), and GVI will enter into a contract (the "Purchase Agreement"),
pursuant to which GVI will be obligated to deliver to the ML&Co. Subsidiary,
immediately prior to the maturity date of the Securities, the Maturity
Consideration required by the Company to pay and discharge all of the Securities
at maturity as described in the ML&Co. Prospectus, subject to GVI's right to
require that the obligations thereunder be satisfied by a cash payment based on
the value of such Maturity Consideration (the "Forward Purchase").  Under the
Purchase Agreement, the Company has agreed to pay and discharge the STRYPES by
delivering to the holders thereof at maturity the form of consideration that the
ML&Co. Subsidiary receives from GVI.


     SECTION 1.  Representations and Warranties.
                 ------------------------------ 

     (a) Representations and Warranties by the Company.  The Company represents
and warrants to the Underwriter as of the date hereof, as of the Closing Time
referred to in Section 2(c) hereof, and as of each Date of Delivery (if any)
referred to in Section 2(b) hereof, and agrees with the Underwriter, as follows:

          (i)  Compliance with Registration Requirements.  The Company meets the
               -----------------------------------------                        
     requirements for use of Form S-3 under the 1933 Act.  Each of the ML&Co.
     Registration Statement and any ML&Co.  Rule 462(b) Registration Statement
     has become effective under the 1933 Act and no stop order suspending the
     effectiveness of the ML&Co. Registration Statement or any ML&Co. Rule
     462(b) Registration Statement has been issued under the 1933 Act and no
     proceedings for that purpose have been instituted or are pending or, to the
     knowledge of the Company, are contemplated by the Commission, and any
     request on the part of the Commission for additional information has been
     complied with.

          At the respective times the ML&Co. Registration Statement, any ML&Co.
     Rule 462(b) Registration Statement and any post-effective amendments
     thereto became effective and at the Closing Time (and, if any Option
     Securities are purchased, at the Date of Delivery), the ML&Co. Registration
     Statement, the ML&Co. Rule 462(b) Registration Statement and any amendments
     and supplements thereto complied and will comply in all material respects
     with the requirements of the 1933 Act and the 1933 Act Regulations and the
     Trust Indenture Act of 1939, as amended (the "1939 Act"), and the

                                       4
<PAGE>
 
     rules and regulations of the Commission under the 1939 Act (the "1939 Act
     Regulations"), and did not and will not contain an untrue statement of a
     material fact or omit to state a material fact required to be stated
     therein or necessary to make the statements therein not misleading.
     Neither the ML&Co. Prospectus nor any amendments or supplements thereto, at
     the time the ML&Co. Prospectus or any such amendment or supplement was
     issued and at the Closing Time (and, if any Option Securities are
     purchased, at the Date of Delivery), included or will include an untrue
     statement of a material fact or omitted or will omit to state a material
     fact necessary in order to make the statements therein, in the light of the
     circumstances under which they were made, not misleading. If Rule 434 is
     used, the Company will comply with the requirements of Rule 434.  The
     representations and warranties in this subsection shall not apply to (A)
     statements in or omissions from the ML&Co. Registration Statement or ML&Co.
     Prospectus made in reliance upon and in conformity with information
     furnished to the Company in writing by the Underwriter expressly for use in
     the ML&Co. Registration Statement or ML&Co. Prospectus or (B) that part of
     the ML&Co. Registration Statement that constitutes the Statement of
     Eligibility on Form T-1 (the "Form T-1") under the 1939 Act of the Trustee.

          Each ML&Co. preliminary prospectus and the prospectus relating to the
     offering of the Securities filed as part of the ML&Co. Registration
     Statement as originally filed or as part of any amendment thereto, or filed
     pursuant to Rule 424 under the 1933 Act, complied when so filed in all
     material respects with the 1933 Act Regulations and, if applicable, each
     ML&Co. preliminary prospectus and the ML&Co. Prospectus delivered to the
     Underwriter for use in connection with this offering was identical to the
     electronically transmitted copies thereof filed with the Commission
     pursuant to EDGAR, except to the extent permitted by Regulation S-T.

          (ii)  Incorporated Documents.  The documents incorporated or deemed to
                ----------------------                                          
     be incorporated by reference in the ML&Co. Registration Statement and the
     ML&Co. Prospectus, when they became effective or at the time they were or
     hereafter are filed with the Commission, complied and will comply in all
     material respects with the requirements of the 1933 Act and the 1933 Act
     Regulations or the 1934 Act and the rules and regulations of the Commission
     thereunder (the "1934 Act Regulations"), as applicable, and, when read
     together with the other information in the ML&Co. Prospectus, at the time
     the ML&Co. Registration Statement became effective, at the time the ML&Co.
     Prospectus was issued and at the Closing Time (and, if any Option
     Securities are purchased, at the Date of Delivery), did not and will not
     contain an untrue statement of a material fact or omit to state a material
     fact required to be stated therein or necessary to make the statements
     therein not misleading.

          (iii)  Independent Accountants.  The accountants who certified the
                 -----------------------                                    
     financial statements and supporting schedules included in the ML&Co.
     Registration Statement are independent public accountants as required by
     the 1933 Act and the 1933 Act Regulations.

                                       5
<PAGE>
 
          (iv)  Financial Statements.  The financial statements included in the
                --------------------                                           
     ML&Co. Registration Statement and the ML&Co. Prospectus, together with the
     related schedules and notes, present fairly the financial position of the
     Company and its consolidated subsidiaries at the dates indicated and the
     statement of operations, stockholders' equity and cash flows of the Company
     and its consolidated subsidiaries for the periods specified; said financial
     statements have been prepared in conformity with generally accepted
     accounting principles ("GAAP") applied on a consistent basis throughout the
     periods involved.  The supporting schedules, if any, included in the ML&Co.
     Registration Statement present fairly in accordance with GAAP the
     information required to be stated therein.  The selected financial data and
     the summary financial information included in the ML&Co. Prospectus present
     fairly the information shown therein and have been compiled on a basis
     consistent with that of the audited financial statements included in the
     ML&Co. Registration Statement.

          (v)  No Material Adverse Change in Business.  Since the respective
               --------------------------------------                       
     dates as of which information is given in the ML&Co. Registration Statement
     and the ML&Co. Prospectus, except as otherwise stated therein, (A) there
     has been no material adverse change in the condition, financial or
     otherwise, or in the earnings, business affairs or business prospects of
     the Company and its subsidiaries considered as one enterprise, whether or
     not arising in the ordinary course of business (a "Material Adverse
     Effect"), (B) there have been no transactions entered into by the Company
     or any of its subsidiaries, other than those in the ordinary course of
     business, which are material with respect to the Company and its
     subsidiaries considered as one enterprise, and (C) except for regular
     quarterly dividends on its outstanding common stock and regular dividends
     on its outstanding preferred stock in amounts per share that are consistent
     with past practice, there has been no dividend or distribution of any kind
     declared, paid or made by the Company on any class of its capital stock.

          (vi)  Good Standing of the Company.  The Company has been duly
                ----------------------------                            
     organized and is validly existing as a corporation in good standing under
     the laws of the State of Delaware and has corporate power and authority to
     own, lease and operate its properties and to conduct its business as
     described in the ML&Co. Prospectus and to enter into and perform its
     obligations under this Agreement, the Indenture and the Purchase Agreement;
     and the Company is duly qualified as a foreign corporation to transact
     business and is in good standing in each other jurisdiction in which such
     qualification is required, whether by reason of the ownership or leasing of
     property or the conduct of business, except where the failure so to qualify
     or to be in good standing would not result in a Material Adverse Effect.

          (vii)  Good Standing of Subsidiaries.  Each subsidiary of the Company
                 -----------------------------                                 
     which is a "significant subsidiary" as defined in Rule 1-02 of Regulation
     S-X under the 1933 Act (each a "Subsidiary" and, collectively, the
     "Subsidiaries") has been duly organized and is validly existing as a
     corporation in good standing under the laws of the jurisdiction of its
     incorporation, has corporate power and authority to own, lease and operate
     its properties and to conduct its business as described in the ML&Co.
     Prospectus and is duly qualified as a foreign corporation to transact
     business and is in good standing in each

                                       6
<PAGE>
 
     jurisdiction in which such qualification is required, whether by reason of
     the ownership or leasing of property or the conduct of business, except
     where the failure so to qualify or to be in good standing would not result
     in a Material Adverse Effect; except as otherwise disclosed in the ML&Co.
     Registration Statement, all of the issued and outstanding capital stock of
     each such Subsidiary has been duly authorized and validly issued and is
     fully paid and non-assessable and is owned by the Company, directly or
     through subsidiaries, free and clear of any security interest, mortgage,
     pledge, lien, encumbrance, claim or equity; and none of the outstanding
     shares of capital stock of any Subsidiary was issued in violation of the
     preemptive or similar rights of any securityholder of such Subsidiary.  The
     only subsidiaries of the Company are (A) the subsidiaries listed in Exhibit
     21 to the Annual Report on Form 10-K of the Company filed with the
     Commission under Section 13 of the 1934 Act for the fiscal year ended
     December 29, 1995 and (B) certain other subsidiaries which, considered in
     the aggregate as a single subsidiary, do not constitute a "significant
     subsidiary" as defined in Rule 1-02 of Regulation S-X under the 1933 Act.

          (viii)  Authorization of Agreement.  This Agreement has been duly
                  --------------------------                               
     authorized, executed and delivered by the Company.

          (ix)  Authorization of the Indenture.  The Indenture has been duly
                ------------------------------                              
     authorized by the Company, duly qualified under the 1939 Act and duly
     executed and delivered by the Company and (assuming the due authorization,
     execution and delivery by the Trustee) will constitute a valid and binding
     agreement of the Company, enforceable against the Company in accordance
     with its terms, except as the enforcement thereof may be limited by
     bankruptcy, insolvency (including, without limitation, all laws relating to
     fraudulent transfers), reorganization, moratorium or similar laws affecting
     enforcement of creditors' rights generally and except as enforcement
     thereof is subject to general principles of equity (regardless of whether
     enforcement is considered in a proceeding in equity or at law).

          (x)  Authorization of the Securities.  The Securities have been duly
               -------------------------------                                
     authorized by the Company for issuance and sale to the Underwriter pursuant
     to this Agreement and, at the Closing Time, will have been duly executed by
     the Company and, when authenticated by the Trustee in the manner provided
     for in the Indenture and delivered against payment of the purchase price
     therefor as provided in this Agreement, will constitute valid and binding
     obligations of the Company, enforceable against the Company in accordance
     with their terms, except as the enforcement thereof may be limited by
     bankruptcy, insolvency (including, without limitation, all laws relating to
     fraudulent transfers), reorganization, moratorium or similar laws affecting
     enforcement of creditors' rights generally and except as enforcement
     thereof is subject to general principles of equity (regardless of whether
     enforcement is considered in a proceeding in equity or at law), and will be
     in the form contemplated by, and entitled to the benefits of, the
     Indenture.

          (xi)  Authorization of the Purchase Agreement.  The Purchase Agreement
                ---------------------------------------                         
     has been duly authorized by the Company and the ML&Co. Subsidiary and, at
     the Closing

                                       7
<PAGE>
 
     Time, will have been duly executed and delivered by the Company and the
     ML&Co. Subsidiary and (assuming the due authorization, execution and
     delivery by GVI) will constitute a valid and binding agreement of the
     Company and the ML&Co. Subsidiary, enforceable against the Company and the
     ML&Co. Subsidiary in accordance with its terms, except as the enforcement
     thereof may be limited by bankruptcy, insolvency (including, without
     limitation, all laws relating to fraudulent transfers), reorganization,
     moratorium or similar laws affecting enforcement of creditors' rights
     generally and except as enforcement thereof is subject to general
     principles of equity (regardless of whether enforcement is considered in a
     proceeding in equity or at law).

          (xii)  Description of Securities, Indenture and Purchase Agreement.
                 -----------------------------------------------------------  
     The Securities, the Indenture and the Purchase Agreement will conform in
     all material respects to the respective statements relating thereto
     contained in the ML&Co. Prospectus and will be in substantially the
     respective forms filed or incorporated by reference, as the case may be, as
     exhibits to the ML&Co. Registration Statement.

          (xiii)  Absence of Defaults and Conflicts.  Neither the Company nor
                  ---------------------------------                          
     any of its subsidiaries is in violation of its charter or by-laws or in
     default in the performance or observance of any obligation, agreement,
     covenant or condition contained in any contract, indenture, mortgage, deed
     of trust, loan or credit agreement, note, lease or other agreement or
     instrument to which the Company or any of its subsidiaries is a party or by
     which it or any of them may be bound, or to which any of the property or
     assets of the Company or any subsidiary is subject (collectively,
     "Agreements and Instruments") except for such defaults that would not
     result in a Material Adverse Effect; and (A) the execution, delivery and
     performance by the Company of this Agreement, the Indenture, the Securities
     and the Purchase Agreement and the consummation of the transactions
     contemplated herein, therein and in the ML&Co. Registration Statement
     (including the issuance and sale of the Securities and the delivery of
     shares of IMC Common Stock pursuant thereto, the consummation of the
     Forward Purchase and the use of the proceeds from the sale of the
     Securities as described in the ML&Co. Prospectus under the caption
     "Supplemental Use of Proceeds") and compliance by the Company with its
     obligations hereunder and under the Indenture, the Securities and the
     Purchase Agreement and (B) the execution, delivery and performance by the
     ML&Co. Subsidiary of the Purchase Agreement and the consummation of the
     transactions contemplated therein and compliance by the ML&Co. Subsidiary
     with its obligations under the Purchase Agreement have been duly authorized
     by all necessary corporate action and do not and will not, whether with or
     without the giving of notice or passage of time or both, conflict with or
     constitute a breach of, or default or Repayment Event (as defined below)
     under, or result in the creation or imposition of any lien, charge or
     encumbrance upon any property or assets of the Company or any subsidiary
     pursuant to, the Agreements and Instruments (except for such conflicts,
     breaches or defaults or liens, charges or encumbrances that would not
     result in a Material Adverse Effect), nor will such action result in any
     violation of the provisions of the charter or by-laws of the Company or any
     subsidiary or, to the best of the Company's knowledge, any applicable law,
     statute, rule, regulation, judgment, order, writ or decree of any
     government, government instrumentality or court, domestic or foreign,
     having jurisdiction over the Company or

                                       8
<PAGE>
 
     any subsidiary or any of their assets, properties or operations.  As used
     herein, a "Repayment Event" means any event or condition which gives the
     holder of any note, debenture or other evidence of indebtedness of the
     Company or any subsidiary (or any person acting on such holder's behalf)
     the right to require the repurchase, redemption or repayment of all or a
     portion of such indebtedness by the Company or any subsidiary.

          (xiv)  Absence of Labor Dispute.  No labor dispute with the employees
                 ------------------------                                      
     of the Company or any subsidiary exists or, to the knowledge of the
     Company, is imminent which may reasonably be expected to result in a
     Material Adverse Effect.

          (xv)  Absence of Proceedings.  There is no action, suit, proceeding,
                ----------------------                                        
     inquiry or investigation before or brought by any court or governmental
     agency or body, domestic or foreign, now pending, or, to the knowledge of
     the Company, threatened, against or affecting the Company or any
     subsidiary, which is required to be disclosed in the ML&Co. Registration
     Statement (other than as disclosed therein), or which might, individually
     or in the aggregate, reasonably be expected to result in a Material Adverse
     Effect, or which might, individually or in the aggregate, reasonably be
     expected to materially and adversely affect the properties or assets
     thereof or the consummation of the transactions contemplated in this
     Agreement, the Indenture or the Purchase Agreement (including the issuance
     and sale of the Securities and the delivery of shares of IMC Common Stock
     pursuant thereto and the consummation of the Forward Purchase) or the
     performance by the Company of its obligations hereunder or thereunder or
     the performance by the ML&Co. Subsidiary of its obligations under the
     Purchase Agreement; the aggregate of all pending legal or governmental
     proceedings to which the Company or any subsidiary is a party or of which
     any of their respective property or assets is the subject which are not
     described in the ML&Co. Registration Statement, including ordinary routine
     litigation incidental to the business, could not reasonably be expected to
     result in a Material Adverse Effect.

          (xvi)  Exhibits.  There are no contracts or documents which are of a
                 --------                                                     
     character required to be described in the ML&Co. Registration Statement,
     the ML&Co. Prospectus or the documents incorporated by reference therein or
     to be filed as exhibits thereto which have not been so described or filed
     as required.

          (xvii)  Possession of Intellectual Property.  The Company and its
                  -----------------------------------                      
     subsidiaries own or possess, or can acquire on reasonable terms, adequate
     trademarks, service marks, trade names and other intellectual property
     (collectively, "Intellectual Property") necessary to carry on the business
     now operated by them, and neither the Company nor any of its subsidiaries
     has received any notice or is otherwise aware of any infringement of or
     conflict with asserted rights of others with respect to any Intellectual
     Property or of any facts or circumstances which would render any
     Intellectual Property invalid or inadequate to protect the interest of the
     Company or any of its subsidiaries therein, and which infringement or
     conflict (if the subject of any unfavorable decision, ruling or finding) or
     invalidity or inadequacy, singly or in the aggregate, would result in a
     Material Adverse Effect.

                                       9
<PAGE>
 
          (xviii)  Absence of Further Requirements.  No filing with, or
                   -------------------------------                     
     authorization, approval, consent, license, order, registration,
     qualification or decree of, any court or governmental authority or agency
     is necessary or required (A) for the performance by the Company of its
     obligations under this Agreement or the Purchase Agreement or the
     consummation by the Company of the transactions contemplated herein or
     therein (including the issuance and sale of the Securities and the delivery
     of shares of IMC Common Stock pursuant thereto and the consummation of the
     Forward Purchase) or for the due execution, delivery or performance of the
     Indenture by the Company or (B) for the performance by the ML&Co.
     Subsidiary of its obligations under the Purchase Agreement or the
     consummation by the ML&Co. Subsidiary of the transactions contemplated
     therein, except such as have been already obtained or as may be required
     under the 1933 Act or the 1933 Act Regulations or state securities laws and
     except for the qualification of the Indenture under the 1939 Act.

          (xix)  Possession of Licenses and Permits.  The Company and the
                 ----------------------------------                      
     subsidiaries possess such permits, licenses, approvals, consents and other
     authorizations (collectively, "Governmental Licenses") issued by the
     appropriate federal, state, local or foreign regulatory agencies or bodies
     necessary to conduct the business now operated by them; the Company and its
     subsidiaries are in compliance with the terms and conditions of all such
     Governmental Licenses, except where the failure so to comply would not,
     singly or in the aggregate, have a Material Adverse Effect; all of the
     Governmental Licenses are valid and in full force and effect, except when
     the invalidity of such Governmental Licenses or the failure of such
     Governmental Licenses to be in full force and effect would not have a
     Material Adverse Effect; and neither the Company nor any of its
     subsidiaries has received any notice of proceedings relating to the
     revocation or modification of any such Governmental Licenses which, singly
     or in the aggregate, if the subject of an unfavorable decision, ruling or
     finding, would result in a Material Adverse Effect.

          (xx)  Title to Property.  The Company and its subsidiaries have good
                -----------------                                             
     and marketable title to all real property owned by the Company and its
     subsidiaries and good title to all other properties owned by them, in each
     case, free and clear of all mortgages, pledges, liens, security interests,
     claims, restrictions or encumbrances of any kind except such as (A) are
     described in the ML&Co. Prospectus or (B) do not, singly or in the
     aggregate, materially affect the value of such property and do not
     interfere with the use made and proposed to be made of such property by the
     Company or any of its subsidiaries; and all of the leases and subleases
     material to the business of the Company and its subsidiaries, considered as
     one enterprise, and under which the Company or any of its subsidiaries
     holds properties described in the ML&Co. Prospectus, are in full force and
     effect, and neither the Company nor any subsidiary has any notice of any
     material claim of any sort that has been asserted by anyone adverse to the
     rights of the Company or any subsidiary under any of the leases or
     subleases mentioned above, or affecting or questioning the rights of the
     Company or such subsidiary to the continued possession of the leased or
     subleased premises under any such lease or sublease.

                                       10
<PAGE>
 
          (xxi)  Compliance with Cuba Act.  The Company has complied with, and
                 ------------------------                                     
     is and will be in compliance with, the provisions of that certain Florida
     act relating to disclosure of doing business with Cuba, codified as Section
     517.075 of the Florida statutes, and the rules and regulation thereunder
     (collectively, the "Cuba Act") or is exempt therefrom.

     (b) Representations and Warranties by GVI.  GVI represents and warrants to
each of the Company and the Underwriter as of the date hereof, as of the Closing
Time referred to in Section 2(c) hereof, and as of each Date of Delivery (if
any) referred to in Section 2(b) hereof, and agrees with each of the Company and
the Underwriter, as follows:

          (i)  Good Standing of GVI. GVI has been duly organized and is validly
               --------------------                                            
     existing as a corporation in good standing under the laws of the State of
     Delaware and has corporate power and authority to enter into and perform
     its obligations under this Agreement and the Purchase Agreement.

          (ii)  Delivery of IMC Common Stock.  At the date hereof, GVI is the
                ----------------------------                                 
     sole registered owner of and has all rights in and to at least 6,510,268
     shares of IMC  Common Stock, free and clear of any security interest,
     mortgage, pledge, lien, encumbrance, claim or equity, except for the
     security interest granted to certain banks pursuant to that certain Credit
     Agreement, dated May 20, 1996, among GVI, as borrower, and the banks named
     as parties therein, which security interest will be released at the Closing
     Time.  If immediately prior to maturity of the Securities GVI delivers to
     the Company shares of IMC Common Stock pursuant to the Purchase Agreement,
     upon delivery by GVI to the ML&Co. Subsidiary of such shares of IMC Common
     Stock pursuant to the Purchase Agreement, the ML&Co. Subsidiary will be the
     sole registered owner of the shares of IMC Common Stock so delivered and,
     assuming the ML&Co. Subsidiary purchased for value in good faith and
     without notice of any adverse claim, the ML&Co. Subsidiary will have
     acquired all rights in and to such shares of IMC Common Stock, free and
     clear of any security interest, mortgage, pledge, lien, encumbrance, claim
     or equity.  The delivery of shares of IMC Common Stock to the ML&Co.
     Subsidiary at maturity of the Securities in accordance with the Purchase
     Agreement is not, and at the time of delivery of such shares will not be,
     subject to any right of first refusal or similar rights of any person
     pursuant to any contract to which GVI or any of its subsidiaries is a party
     or by which any of them is bound.

          (iii)  Authorization of Agreement.  This Agreement has been duly
                 --------------------------                               
     authorized, executed and delivered by GVI.

          (iv)  Authorization of the Purchase Agreement. The Purchase Agreement
                ---------------------------------------                        
     has been duly authorized by GVI and, at the Closing Time, will have been
     duly executed and delivered by GVI and (assuming the due authorization,
     execution and delivery by the Company and the ML&Co. Subsidiary) will
     constitute a valid and binding agreement of GVI, enforceable against GVI in
     accordance with its terms, except as the enforcement thereof may be limited
     by bankruptcy, insolvency (including, without limitation, all laws relating
     to fraudulent transfers), reorganization, moratorium or similar laws
     affecting enforcement of creditors' rights generally and except as
     enforcement thereof is subject

                                       11
<PAGE>
 
     to general principles of equity (regardless of whether enforcement is
     considered in a proceeding in equity or at law).  Amounts received by GVI
     at Closing Time and at each Date of Delivery, if any, pursuant to the
     Purchase Agreement will not be used by GVI for the purpose, whether
     immediate, incidental or ultimate, of buying or carrying a margin stock, as
     such terms are defined in Regulation G promulgated by the Board of
     Governors of the Federal Reserve System.

          (v)  Absence of Defaults and Conflicts. The execution, delivery and
               ---------------------------------                             
     performance by GVI of this Agreement and the Purchase Agreement and the
     consummation by GVI of the transactions contemplated herein and therein and
     compliance by GVI with its obligations hereunder and thereunder have been
     duly authorized by all necessary corporate action and do not and will not,
     whether with or without the giving of notice or passage of time or both,
     conflict with or constitute a breach of, or default or GVI Repayment Event
     (as defined below) under, or result in the creation or imposition of any
     lien, charge or encumbrance upon any property or assets of GVI or any of
     its subsidiaries pursuant to, any contract, indenture, mortgage, deed of
     trust, loan or credit agreement, note, lease or any other agreement or
     instrument to which GVI or any of its subsidiaries is a party or by which
     it or any of them may be bound, or to which any of the property or assets
     of GVI or any of its subsidiaries is subject (except for such conflicts,
     breaches or defaults or liens, charges or encumbrances that would not,
     singly or in the aggregate, materially and adversely affect the ability of
     GVI to perform its obligations under this Agreement or the Purchase
     Agreement), nor will such action result in any violation of the provisions
     of the charter or by-laws of GVI or any of its subsidiaries, or any
     applicable law, statute, rule or regulation of any government or government
     instrumentality having jurisdiction over GVI or any of its subsidiaries or
     any of their assets, properties or operations (other than any state
     securities or "blue sky" law, statute, rule or regulation, as to which no
     representation and warranty is made), or any applicable judgment, order,
     writ or decree of any government, government instrumentality or domestic
     court having jurisdiction over GVI or any of its subsidiaries or any of
     their assets, properties or operations (except in all cases for such
     violations that would not, singly or in the aggregate, materially and
     adversely affect the ability of GVI to perform its obligations under this
     Agreement or the Purchase Agreement).  As used herein, a "GVI Repayment
     Event" means any event or condition which gives the holder of any note,
     debenture or other evidence of indebtedness (or any person acting on such
     holder's behalf) the right to require the repurchase, redemption or
     repayment of all or a portion of such indebtedness by GVI or any of its
     subsidiaries.

          (vi)  Absence of Further Requirements. No filing with, or
                -------------------------------                    
     authorization, approval, consent, license, order, registration,
     qualification or decree of, any court or governmental authority or agency
     is necessary or required for the execution, delivery or performance by GVI
     of this Agreement or the Purchase Agreement or the consummation by GVI of
     the transactions contemplated by this Agreement or the Purchase Agreement,
     except such as have been already obtained or as may be required under the
     1933 Act or the 1933 Act Regulations or state securities laws.

                                       12
<PAGE>
 
          (vii)  IMC Registration Statement and Prospectus.  The IMC
                 -----------------------------------------          
     Registration Statement, any IMC Rule 462(b) Registration Statement or any
     post-effective amendments thereto, at the respective times the IMC
     Registration Statement, any IMC Rule 462(b) Registration Statement or any
     post-effective amendments thereto became effective, did not contain an
     untrue statement of a material fact or omit to state a material fact
     required to be stated therein or necessary to make the statements therein
     not misleading.  The IMC Prospectus or any amendment or supplement thereto,
     at the time the IMC Prospectus was issued, at the time any such amended or
     supplemented prospectus was issued or at the Closing Time (and, if any
     Option Securities are purchased, at the Date of Delivery), did not and will
     not include an untrue statement of a material fact and did not and will not
     omit to state a material fact necessary in order to make the statements
     therein, in the light of the circumstances under which they were made, not
     misleading.  The representations and warranties in this subsection shall
     apply only to statements in or omissions from the IMC Registration
     Statement (or any amendment thereto) or IMC Prospectus (or any amendment or
     supplement thereto) made in reliance upon and in conformity with
     information furnished to IMC in writing by GVI expressly for use in the IMC
     Registration Statement (or any amendment thereto) or IMC Prospectus (or any
     amendment or supplement thereto).

     (c) Officer's Certificates.  Any certificate signed by any officer of the
Company or any of its subsidiaries delivered to the Underwriter shall be deemed
a representation and warranty by the Company to the Underwriter as to the
matters covered thereby.  Any certificate signed by any officer of GVI or any of
its subsidiaries delivered to the Underwriter or the Company shall be deemed a
representation and warranty by GVI to the Underwriter or the Company, as the
case may be, as to the matters covered thereby.

     SECTION 2.  Sale and Delivery to Underwriter; Closing.
                 ----------------------------------------- 

     (a) Initial Securities.  On the basis of the representations and warranties
herein contained and subject to the terms and conditions herein set forth, the
Company agrees to sell to the Underwriter, and the Underwriter agrees to
purchase from the Company, at the price per STRYPES set forth in Schedule A, the
Initial Securities.

     (b) Option Securities.  In addition, on the basis of the representations
and warranties herein contained and subject to the terms and conditions herein
set forth, the Company hereby grants an option to the Underwriter to purchase up
to an additional 849,167 STRYPES at the price per STRYPES set forth in Schedule
A.  The option hereby granted will expire 30 days after the date hereof and may
be exercised in whole or in part from time to time only for the purpose of
covering over-allotments which may be made in connection with the offering and
distribution of the Initial Securities upon notice by the Underwriter to the
Company setting forth the number of Option Securities as to which the
Underwriter is then exercising the option and the time and date of payment and
delivery for such Option Securities.  Any such time and date of delivery (a
"Date of Delivery") shall be determined by the Underwriter, but shall not be
later than seven full business days after the exercise of said option, nor in
any event prior to the Closing Time, as hereinafter defined.

                                       13
<PAGE>
 
     (c) Payment.  Payment of the purchase price for, and delivery of
certificates for, the Initial Securities shall be made at the offices of Brown &
Wood LLP, One World Trade Center, New York, New York  10048, or at such other
place as shall be agreed upon by the Underwriter and the Company, at 10:00 A.M.
(Eastern time) on the third (fourth, if the pricing occurs after 4:30 P.M.
(Eastern time) on any given day) business day after the date hereof, or such
other time not later than ten business days after such date as shall be agreed
upon by the Underwriter and the Company (such time and date of payment and
delivery being herein called "Closing Time").  In addition, in the event that
any or all of the Option Securities are purchased by the Underwriter, payment of
the purchase price for, and delivery of certificates for, such Option Securities
shall be made at the above-mentioned offices, or at such other place as shall be
agreed upon by the Underwriter and the Company, on each Date of Delivery as
specified in the notice from the Underwriter to the Company.

     Payment shall be made to the Company by wire transfer of immediately
available funds to a bank account designated by the Company, against delivery to
the Underwriter of certificates for the Securities to be purchased by it.

     (d) Denominations; Registration.  Certificates for the Initial Securities
and the Option Securities, if any, shall be in such denominations and registered
in such names as the Underwriter may request in writing at least one full
business day before the Closing Time or the relevant Date of Delivery, as the
case may be.  The certificates for the Initial Securities and the Option
Securities, if any, will be made available for examination and packaging by the
Underwriter in The City of New York not later than 10:00 A.M. (Eastern time) on
the business day prior to the Closing Time or the relevant Date of Delivery, as
the case may be.

     SECTION 3.  Covenants.
                 --------- 

     (a) Covenants of the Company.  The Company covenants with the Underwriter
as follows:

          (i) Compliance with Securities Regulations and Commission Requests.
     The Company, subject to Section 3(a)(ii), will comply with the requirements
     of Rule 430A or Rule 434, as applicable, and will notify the Underwriter
     immediately, and confirm the notice in writing, (A) when any post-effective
     amendment to the ML&Co. Registration Statement shall become effective, or
     any supplement to the ML&Co. Prospectus or any amended ML&Co. Prospectus
     shall have been filed, (B) of the receipt of any comments from the
     Commission, (C) of any request by the Commission for any amendment to the
     ML&Co. Registration Statement or any amendment or supplement to the ML&Co.
     Prospectus or for additional information, and (D) of the issuance by the
     Commission of any stop order suspending the effectiveness of the ML&Co.
     Registration Statement or of any order preventing or suspending the use of
     any ML&Co. preliminary prospectus, or of the suspension of the
     qualification of the Securities for offering or sale in any jurisdiction,
     or of the initiation or threatening of any proceedings for any of such
     purposes.  The Company will promptly effect the filings necessary pursuant
     to Rule 424(b) and will take such steps as it deems necessary to ascertain
     promptly whether the form of prospectus transmitted for filing under Rule
     424(b) was received for filing by the

                                       14
<PAGE>
 
     Commission and, in the event that it was not, it will promptly file such
     prospectus.  The Company will make every reasonable effort to prevent the
     issuance of any stop order and, if any stop order is issued, to obtain the
     lifting thereof at the earliest possible moment.

          (ii) Filing of Amendments.   The Company will give the Underwriter
     notice of its intention to file or prepare any amendment to the ML&Co.
     Registration Statement (including any filing under Rule 462(b)), any ML&Co.
     Term Sheet or any amendment, supplement or revision to either the
     prospectus relating to the offering of the Securities included in the
     ML&Co. Registration Statement at the time it became effective or to the
     ML&Co. Prospectus, whether pursuant to the 1933 Act, the 1934 Act or
     otherwise, will furnish the Underwriter with copies of any such documents a
     reasonable amount of time prior to such proposed filing or use, as the case
     may be, and will not file or use any such document to which the Underwriter
     or counsel for the Underwriter shall reasonably object.

          (iii)  Delivery of ML&Co. Registration Statements.  The Company has
     furnished or will deliver to the Underwriter, without charge, signed copies
     of the ML&Co. Registration Statement as originally filed and of each
     amendment thereto (including exhibits filed therewith or incorporated by
     reference therein and documents incorporated or deemed to be incorporated
     by reference therein) and signed copies of all consents and certificates of
     experts.  If applicable, the copies of the ML&Co. Registration Statement
     and each amendment thereto furnished to the Underwriter will be identical
     to the electronically transmitted copies thereof filed with the Commission
     pursuant to EDGAR, except to the extent permitted by Regulation S-T.

          (iv) Delivery of ML&Co. Prospectuses.  The Company has delivered to
     the Underwriter, without charge, as many copies of each ML&Co. preliminary
     prospectus as the Underwriter reasonably requested, and the Company hereby
     consents to the use of such copies for purposes permitted by the 1933 Act.
     The Company will furnish to the Underwriter, without charge, during the
     period when the ML&Co. Prospectus is required to be delivered under the
     1933 Act or the 1934 Act, such number of copies of the ML&Co. Prospectus
     (as amended or supplemented) as the Underwriter may reasonably request.  If
     applicable, the ML&Co. Prospectus and any amendments or supplements thereto
     furnished to the Underwriter will be identical to the electronically
     transmitted copies thereof filed with the Commission pursuant to EDGAR,
     except to the extent permitted by Regulation S-T.

          (v) Continued Compliance with Securities Laws.  The Company will
     comply with the 1933 Act and the 1933 Act Regulations and the 1934 Act and
     the 1934 Act Regulations so as to permit the completion of the distribution
     of the Securities as contemplated in this Agreement and in the ML&Co.
     Prospectus.  If at any time when a prospectus is required by the 1933 Act
     to be delivered in connection with sales of the Securities, any event shall
     occur or condition shall exist as a result of which it is necessary, in the
     opinion of counsel for the Underwriter or for the Company, to amend the
     ML&Co. Registration Statement or amend or supplement the ML&Co. Prospectus

                                       15
<PAGE>
 
     in order that the ML&Co. Prospectus will not include any untrue statements
     of a material fact or omit to state a material fact necessary in order to
     make the statements therein not misleading in the light of the
     circumstances existing at the time it is delivered to a purchaser, or if it
     shall be necessary, in the opinion of either such counsel, at any such time
     to amend the ML&Co. Registration Statement or amend or supplement the
     ML&Co. Prospectus in order to comply with the requirements of the 1933 Act
     or the 1933 Act Regulations, the Company will promptly prepare and file
     with the Commission, subject to Section 3(a)(ii), such amendment or
     supplement as may be necessary to correct such statement or omission or to
     make the ML&Co. Registration Statement or the ML&Co. Prospectus comply with
     such requirements, and the Company will furnish to the Underwriter such
     number of copies of such amendment or supplement as the Underwriter may
     reasonably request.

          (vi) Blue Sky Qualifications.  The Company will use its best efforts,
     in cooperation with the Underwriter, to qualify the Securities for offering
     and sale under the applicable securities laws of such states and other
     jurisdictions of the United States as the Underwriter may designate and to
     maintain such qualifications in effect for a period of not less than one
     year from the later of the effective date of the ML&Co. Registration
     Statement and any ML&Co. Rule 462(b) Registration Statement; provided,
     however, that the Company shall not be obligated to file any general
     consent to service of process or to qualify as a foreign corporation or as
     a dealer in securities in any jurisdiction in which it is not so qualified
     or to subject itself to taxation in respect of doing business in any
     jurisdiction in which it is not otherwise so subject.  In each jurisdiction
     in which the Securities have been so qualified, the Company will file such
     statements and reports as may be required by the laws of such jurisdiction
     to continue such qualification in effect for a period of not less than one
     year from the effective date of the ML&Co. Registration Statement and any
     ML&Co. Rule 462(b) Registration Statement.

          (vii)  Rule 158.  The Company will timely file such reports pursuant
     to the 1934 Act as are necessary in order to make generally available to
     its securityholders as soon as practicable an earnings statement for the
     purposes of, and to provide the benefits contemplated by, the last
     paragraph of Section 11(a) of the 1933 Act.

          (viii)  Use of Proceeds.  The Company will use the net proceeds
     received by it from the sale of the Securities in the manner specified in
     the ML&Co. Prospectus under "Supplemental Use of Proceeds."

          (ix) Listing.  The Company will use its best efforts to effect the
     listing of the Securities on the New York Stock Exchange.

          (x) Reporting Requirements.  The Company, during the period when the
     ML&Co. Prospectus is required to be delivered under the 1933 Act or the
     1934 Act, will file all documents required to be filed with the Commission
     pursuant to the 1934 Act within the time periods required by the 1934 Act
     and the 1934 Act Regulations.

                                       16
<PAGE>
 
     (b)  Covenants of GVI.

          (i) Restriction on Sale of Securities.  During a period of 90 days
              ----------------------------------                            
     from the date of the IMC Prospectus, GVI will not, without the prior
     written consent of the Underwriter, (x) offer, sell, contract to sell or
     otherwise dispose of, directly or indirectly, any shares of IMC Common
     Stock, securities convertible into, exchangeable for or repayable with
     shares of IMC Common Stock, or rights or warrants to acquire shares of IMC
     Common Stock, or (y) cause to be filed any registration statement under the
     1933 Act with respect to any shares of IMC Common Stock, securities
     convertible into, exchangeable for or repayable with shares of IMC Common
     Stock, or rights or warrants to acquire shares of IMC Common Stock.  The
     foregoing sentence shall not apply to the execution and delivery by GVI of
     the Purchase Agreement or the consummation by GVI of the transactions
     contemplated therein.

          (ii) Purpose Statement.  At or prior to Closing Time, GVI will deliver
               -----------------                                                
     to the ML&Co. Subsidiary a duly executed purpose statement on Form F. R. G-
     3 of the Board of Governors of the Federal Reserve System.

     SECTION 4.  Payment of Expenses.  (a)  Expenses Payable by the Company.
                 -------------------                                         
The Company will pay all expenses incident to the performance of its obligations
under this Agreement, including (i) the preparation, printing and filing of the
ML&Co. Registration Statement (including financial statements and exhibits) as
originally filed and of each amendment thereto, (ii) the preparation, printing
and delivery to the Underwriter of this Agreement, the Indenture, the Purchase
Agreement and such other documents as may be required in connection with the
offering, purchase, sale, issuance or delivery of the Securities, (iii) the
preparation, issuance and delivery of the certificates for the Securities to the
Underwriter, (iv) the fees and disbursements of the Company's counsel,
accountants and other advisors, (v) the qualification of the Securities under
securities laws in accordance with the provisions of Section 3(a)(vi) hereof,
including filing fees and the reasonable fees and disbursements of the Company's
counsel in connection therewith and in connection with the preparation of the
Blue Sky Survey and any supplement thereto, (vi) the printing and delivery to
the Underwriter of copies of each ML&Co. preliminary prospectus, any ML&Co. Term
Sheets and of the ML&Co. Prospectus and any amendments or supplements thereto,
(vii) the preparation, printing and delivery to the Underwriter of copies of the
Blue Sky Survey and any supplement thereto, (viii) the fees and expenses of the
Trustee, including the fees and disbursements of counsel for the Trustee in
connection with the Indenture and the Securities, (ix) any fees payable in
connection with the rating of the Securities, (x) the filing fees incident to,
and the reasonable fees and disbursements of counsel to the Underwriter in
connection with, the review by the National Association of Securities Dealers,
Inc. (the "NASD") of the terms of the sale of the Securities and (xi) the fees
and expenses incurred in connection with the listing of the Securities on the
New York Stock Exchange.

     (b) Expenses Payable by GVI.  GVI will pay all expenses incident to the
performance of its obligations under this Agreement, including the fees and
disbursements of its counsel and advisors.

                                       17
<PAGE>
 
     (c) Termination of Agreement.  If this Agreement is terminated by the
Underwriter in accordance with the provisions of Section 5 or Section 9(a)(i)
hereof, the Company shall reimburse the Underwriter for all of its out-of-pocket
expenses, including the reasonable fees and disbursements of counsel for the
Underwriter.

     SECTION 5.  Conditions.
                 ---------- 

     (a) Conditions of Underwriter's Obligations.  The obligations of the
Underwriter hereunder are subject to the accuracy of the representations and
warranties of the Company and GVI contained in Sections 1(a) and 1(b) hereof,
respectively, to the accuracy of the representations and warranties of IMC
contained in the Registration Agreement, to the accuracy of the statements in
certificates of any officer of the Company, IMC or GVI delivered pursuant to the
provisions hereof, to the performance by the Company and GVI of their respective
covenants and other obligations hereunder, to the performance by IMC of its
covenants and other obligations under the Registration Agreement, and to the
following further conditions:

          (1) Effectiveness of ML&Co. Registration Statement.  The ML&Co.
     Registration Statement, including any ML&Co. Rule 462(b) Registration
     Statement, has become effective and at Closing Time no stop order
     suspending the effectiveness of the ML&Co. Registration Statement shall
     have been issued under the 1933 Act or proceedings therefor initiated or
     threatened by the Commission, and any request on the part of the Commission
     for additional information shall have been complied with to the reasonable
     satisfaction of counsel to the Underwriter.  A prospectus containing the
     Rule 430A Information shall have been filed with the Commission in
     accordance with Rule 424(b) (or a post-effective amendment providing such
     information shall have been filed and declared effective in accordance with
     the requirements of Rule 430A) or, if the Company has elected to rely upon
     Rule 434, an ML&Co. Term Sheet shall have been filed with the Commission in
     accordance with Rule 424(b).

          (2) Effectiveness of IMC Registration Statement.  The IMC Registration
     Statement, including any IMC Rule 462(b) Registration Statement, has become
     effective and at Closing Time no stop order suspending the effectiveness of
     the IMC Registration Statement shall have been issued under the 1933 Act or
     proceedings therefor initiated or threatened by the Commission, and any
     request on the part of the Commission for additional information shall have
     been complied with to the reasonable satisfaction of counsel to the
     Underwriter.

          (3) Opinion of Counsel for the Company.  At Closing Time, the
     Underwriter shall have received the favorable opinion, dated as of Closing
     Time, of Brown & Wood LLP, counsel for the Company, in form and substance
     satisfactory to the Underwriter, to the effect set forth in Exhibit A
     hereto and to such further effect as the Underwriter may reasonably
     request.

          (4) Opinion of Counsel for IMC.  At Closing Time, the Underwriter
     shall have received the favorable opinion, dated as of Closing Time, of
     Sidley & Austin, counsel for IMC, in form and substance satisfactory to the
     Underwriter, to the effect set

                                       18
<PAGE>
 
     forth in Exhibit B hereto and to such further effect as the Underwriter may
     reasonably request.

          (5) Opinion of Counsel for GVI.  At Closing Time, the Underwriter
     shall have received the favorable opinion, dated as of Closing Time, of
     Rosenberg & Liebentritt, P.C., counsel for GVI, in form and substance
     satisfactory to the Underwriter, to the effect set forth in Exhibit C
     hereto and to such further effect as the Underwriter may reasonably
     request.

          (6) Company Officers' Certificate.  At Closing Time, there shall not
     have been, since the date hereof or since the respective dates as of which
     information is given in the ML&Co. Prospectus, any material adverse change
     in the condition, financial or otherwise, or in the earnings, business
     affairs or business prospects of the Company and its subsidiaries
     considered as one enterprise, whether or not arising in the ordinary course
     of business, and the Underwriter shall have received a certificate of the
     President or a Vice President of the Company and of the chief financial or
     chief accounting officer of the Company, dated as of Closing Time, to the
     effect that (i) there has been no such material adverse change, (ii) the
     representations and warranties in Section 1(a) hereof are true and correct
     with the same force and effect as though expressly made at and as of
     Closing Time, (iii) the Company has complied with all agreements and
     satisfied all conditions on its part to be performed or satisfied at or
     prior to Closing Time, and (iv) no stop order suspending the effectiveness
     of the ML&Co. Registration Statement has been issued and no proceedings for
     that purpose have been instituted or are pending or are contemplated by the
     Commission.

          (7) IMC Officers' Certificate.  At Closing Time, there shall not have
     been, since the date hereof or since the respective dates as of which
     information is given in the IMC Prospectus, any material adverse change in
     the condition, financial or otherwise, or in the earnings, business affairs
     or business prospects of IMC and its subsidiaries considered as one
     enterprise, whether or not arising in the ordinary course of business, and
     the Underwriter shall have received a certificate of the President or a
     Vice President of IMC and of the chief financial or chief accounting
     officer of IMC, dated as of Closing Time, to the effect that (i) there has
     been no such material adverse change, (ii) the representations and
     warranties of IMC contained in Section 1(a) of the Registration Agreement
     are true and correct with the same force and effect as though expressly
     made at and as of Closing Time, (iii) IMC has complied with all agreements
     and satisfied all conditions on its part to be performed or satisfied at or
     prior to Closing Time pursuant to the Registration Agreement, and (iv) no
     stop order suspending the effectiveness of the IMC Registration Statement
     has been issued and no proceedings for that purpose have been instituted
     or, to the best of their knowledge, are pending or are contemplated by the
     Commission.

          (8) GVI Officer's Certificate.  At Closing Time, the Underwriter shall
     have received a certificate of the President or a Vice President of GVI,
     dated as of Closing Time, to the effect that (i) the representations and
     warranties of GVI contained in Section 1(b) hereof are true and correct
     with the same force and effect as though expressly made

                                       19
<PAGE>
 
     at and as of Closing Time and (ii) GVI has complied with all agreements and
     satisfied all conditions on its part to be performed or satisfied at or
     prior to Closing Time.

          (9) Company Accountant's Comfort Letter.  At the time of the execution
     of this Agreement, the Underwriter shall have received from Deloitte &
     Touche LLP a letter dated such date, in form and substance satisfactory to
     the Underwriter, containing statements and information of the type
     ordinarily included in accountants' "comfort letters" to underwriters with
     respect to the financial statements and certain financial information
     contained in the ML&Co. Registration Statement and the ML&Co. Prospectus.

          (10) IMC Accountant's Comfort Letter.  At the time of the execution of
     this Agreement, the Underwriter shall have received from each of Ernst &
     Young LLP and Arthur Andersen LLP a letter dated such date, in form and
     substance satisfactory to the Underwriter, containing statements and
     information of the type ordinarily included in accountants' "comfort
     letters" to underwriters with respect to the financial statements and
     certain financial information contained in the IMC Registration Statement
     and the IMC Prospectus.

          (11) Company Bring-down Comfort Letter.  At Closing Time, the
     Underwriter shall have received from Deloitte & Touche LLP a letter, dated
     as of Closing Time, to the effect that they reaffirm the statements made in
     the letter furnished by them pursuant to Section 5(a)(9) hereof, except
     that the "specified date" referred to shall be a date not more than three
     business days prior to Closing Time.

          (12) IMC Bring-down Comfort Letter.  At Closing Time, the Underwriter
     shall have received from Ernst & Young LLP a letter, dated as of Closing
     Time, to the effect that they reaffirm the statements made in the letter
     furnished by them pursuant to Section 5(a)(10) hereof, except that the
     "specified date" referred to shall be a date not more than three business
     days prior to Closing Time.

          (13) Maintenance of Rating.  Since the date of this Agreement, there
     shall not have occurred a downgrading in the rating assigned to any of the
     Company's securities by any "nationally recognized statistical rating
     agency," as that term is defined by the Commission for purposes of Rule
     436(g)(2) under the 1933 Act, and no such organization shall have publicly
     announced that it has under surveillance or review its rating of any of the
     Company's securities.

          (14) Approval of Listing.  At Closing Time, the Securities shall have
     been approved for listing on the New York Stock Exchange, subject only to
     official notice of issuance.

          (15) No Objection.  The NASD shall not have raised any objection with
     respect to the fairness and reasonableness of the underwriting terms and
     arrangements.

                                       20
<PAGE>
 
          (16) Lock-up Agreements.  At the date of this Agreement, the
     Underwriter shall have received an agreement substantially in the form of
     Exhibit D hereto signed by each of the persons and entities listed on
     Schedule B hereto.

          (17) Conditions to Purchase of Option Securities.  In the event that
     the Underwriter exercises its option provided in Section 2(b) hereof to
     purchase all or any portion of the Option Securities, the representations
     and warranties of the Company and GVI contained herein, the representations
     and warranties of IMC contained in the Registration Agreement and the
     statements in any certificates furnished by the Company, IMC or GVI
     hereunder shall be true and correct as of each Date of Delivery and, at the
     relevant Date of Delivery, the Underwriter shall have received:

          (A)  Company Officers' Certificate.  A certificate, dated such Date of
               -----------------------------                                    
          Delivery, of the President or a Vice President of the Company and of
          the chief financial or chief accounting officer of the Company
          confirming that the certificate delivered at Closing Time pursuant to
          Section 5(a)(6) hereof is true and correct as of such Date of
          Delivery.

          (B)  IMC Officers' Certificate.  A certificate, dated such Date of
               -------------------------                                    
          Delivery, of the President or a Vice President of IMC and of the chief
          financial or chief accounting officer of IMC confirming that the
          certificate delivered at Closing Time pursuant to Section 5(a)(7)
          hereof is true and correct as of such Date of Delivery.

          (C)  GVI Officers' Certificate.  A certificate, dated such Date of
               -------------------------                                    
          Delivery, of the President or a Vice President of GVI confirming that
          the certificate delivered at Closing Time pursuant to Section 5(a)(8)
          hereof is true and correct as of such Date of Delivery.

          (D)  Opinion of Counsel for the Company.  The favorable opinion of
               ----------------------------------                           
          Brown & Wood LLP, counsel for the Company, in form and substance
          satisfactory to the Underwriter, dated such Date of Delivery, relating
          to the Option Securities to be purchased on such Date of Delivery and
          otherwise to the same effect as the opinion required by Section
          5(a)(3) hereof.

          (E)  Opinion of Counsel for IMC.  The favorable opinion of Sidley &
               --------------------------                                    
          Austin, counsel for IMC, in form and substance satisfactory to the
          Underwriter, dated such Date of Delivery, to the same effect as the
          opinion required by Section 5(a)(4) hereof.

          (F)  Opinion of Counsel for GVI.  The favorable opinion of Rosenberg &
               --------------------------                                       
          Liebentritt, P.C., counsel for GVI, in form and substance satisfactory
          to the Underwriter, dated such Date of Delivery, to the same effect as
          the opinion required by Section 5(a)(5) hereof.

                                       21
<PAGE>
 
          (G)  Company Bring-down Comfort Letter.  A letter from Deloitte &
               ---------------------------------                           
          Touche LLP, in form and substance satisfactory to the Underwriter and
          dated such Date of Delivery, substantially the same in form and
          substance as the letter furnished to the Underwriter pursuant to
          Section 5(a)(11) hereof, except that the "specified date" in the
          letter furnished pursuant to this paragraph shall be a date not more
          than five days prior to such Date of Delivery.

          (H)  IMC Bring-down Comfort Letter.  A Letter from Ernst & Young LLP,
               -----------------------------                                   
          in form and substance satisfactory to the Underwriter and dated such
          Date of Delivery, substantially the same in form and substance as the
          letter furnished to the Underwriter pursuant to Section 5(a)(12)
          hereof, except that the "specified date" in the letter furnished
          pursuant to this paragraph shall be a date not more than five days
          prior to such Date of Delivery.

          (18) Additional Documents.  At Closing Time and at each Date of
     Delivery, counsel for the Underwriter shall have been furnished with such
     documents and opinions as they may require for the purpose of enabling them
     to pass upon the issuance and sale of the Securities as herein
     contemplated, or in order to evidence the accuracy of any of the
     representations or warranties, or the fulfillment of any of the conditions,
     contained herein or in the Registration Agreement; and all proceedings
     taken by the Company in connection with the issuance and sale of the
     Securities as herein contemplated shall be satisfactory in form and
     substance to the Underwriter and counsel for the Underwriter.

     (b) Conditions of the Company's Obligations.  The obligations of the
Company hereunder are subject to the accuracy of the representations and
warranties of GVI contained in Section 1(b) hereof, to the accuracy of the
representations and warranties of IMC contained in the Registration Agreement,
to the accuracy of the statements in certificates of any officer of IMC or GVI
delivered pursuant to the provisions hereof, to the performance by GVI of its
covenants and other obligations hereunder, to the performance by IMC of its
covenants and other obligations under the Registration Agreement, and to the
following further conditions:

          (1) Effectiveness of IMC Registration Statement.  The IMC Registration
     Statement, including any IMC Rule 462(b) Registration Statement, has become
     effective and at Closing Time no stop order suspending the effectiveness of
     the IMC Registration Statement shall have been issued under the 1933 Act or
     proceedings therefor initiated or threatened by the Commission, and any
     request on the part of the Commission for additional information shall have
     been complied with to the reasonable satisfaction of counsel to the
     Company.

          (2) Opinion of Counsel for the Company.  At Closing Time, the Company
     shall have received the favorable opinion, dated as of Closing Time, of
     Brown & Wood LLP, counsel for the Company, to the same effect as the
     opinion required by Section 5(a)(3) hereof.

                                       22
<PAGE>
 
          (3) Opinion of Counsel for IMC.  At Closing Time, the Company shall
     have received the favorable opinion, dated as of Closing Time, of Sidley &
     Austin, counsel for IMC, to the same effect as the opinion required by
     Section 5(a)(4) hereof.

          (4) Opinion of Counsel for GVI.  At Closing Time, the Company shall
     have received the favorable opinion, dated as of Closing Time, of Rosenberg
     & Liebentritt, P.C., counsel for IMC and GVI, to the same effect as the
     opinion required by Section 5(a)(5) hereof.

          (5) IMC Officers' Certificate.  At Closing Time, the Company shall
     have received a certificate of the President or a Vice President of IMC and
     of the chief financial or chief accounting officer of IMC, dated as of
     Closing Time, to the same effect as the certificate delivered to the
     Underwriter pursuant to Section 5(a)(7) hereof.

          (6) GVI Officer's Certificate.  At Closing Time, the Company shall
     have received a certificate of the President or a Vice President of GVI,
     dated as of Closing Time, to the same effect as the certificate delivered
     to the Underwriter pursuant to Section 5(a)(8) hereof.

          (7) IMC Accountant's Comfort Letters.  At the time of the execution of
     this Agreement, the Company shall have received from each of Ernst & Young
     LLP and Arthur Andersen LLP a letter dated such date, in form and substance
     satisfactory to the Company, substantially the same in form and substance
     as the letter delivered to the Underwriter pursuant to Section 5(a)(10)
     hereof.

          (8) IMC Bring-down Comfort Letter.  At Closing Time, the Company shall
     have received from Ernst & Young LLP a letter, dated as of Closing Time, in
     form and substance satisfactory to the Company, substantially the same in
     form and substance as the letter delivered to the Underwriter pursuant to
     Section 5(a)(12) hereof.

          (9) Conditions to Sale of Option Securities.  In the event that the
     Underwriter exercises its option provided in Section 2(b) hereof to
     purchase all or any portion of the Option Securities, the representations
     and warranties of GVI contained herein, the representations and warranties
     of IMC contained in the Registration Agreement and the statements in any
     certificates furnished by IMC or GVI hereunder shall be true and correct as
     of each Date of Delivery and, at the relevant Date of Delivery, the Company
     shall have received:

          (A)  IMC Officers' Certificate.  A certificate, dated such Date of
               -------------------------                                    
          Delivery, of the President or a Vice President of IMC and of the chief
          financial or chief accounting officer of IMC confirming that the
          certificate delivered at Closing Time pursuant to Section 5(b)(5)
          hereof is true and correct as of such Date of Delivery.

          (B)  GVI Officers' Certificate.  A certificate, dated such Date of
               -------------------------                                    
          Delivery, of the President or a Vice President of GVI confirming that
          the certificate delivered at

                                       23
<PAGE>
 
          Closing Time pursuant to Section 5(b)(6) hereof is true and correct as
          of such Date of Delivery.

          (C)  Opinion of Counsel for the Company.  The favorable opinion, dated
               ----------------------------------                               
          such Date of Delivery, of Brown & Wood LLP, counsel for the Company,
          to the same effect as the opinion required by Section 5(a)(17)(D)
          hereof.

          (D)  Opinion of Counsel for IMC.  The favorable opinion, dated such
               --------------------------                                    
          Date of Delivery, of Sidley & Austin, counsel for IMC, to the same
          effect as the opinion required by Section 5(a)(17)(E) hereof.

          (E)  Opinion of Counsel for GVI.  The favorable opinion, dated such
               --------------------------                                    
          Date of Delivery, of Rosenberg & Liebentritt, P.C., counsel for GVI,
          to the same effect as the opinion required by Section 5(a)(17)(F)
          hereof.

          (F)  IMC Bring-down Comfort Letter.  A Letter from Ernst & Young LLP,
               -----------------------------                                   
          in form and substance satisfactory to the Company and dated such Date
          of Delivery, substantially the same in form and substance as the
          letter furnished to the Underwriter pursuant to Section 5(a)(17)(H)
          hereof.

     (c) Termination of Agreement.  If any condition specified in subsection (a)
of this Section shall not have been fulfilled when and as required to be
fulfilled, this Agreement, or, in the case of any condition to the purchase of
Option Securities on a Date of Delivery which is after the Closing Time, the
obligations of the Underwriter to purchase the relevant Option Securities, may
be terminated by the Underwriter by notice to the Company and GVI at any time at
or prior to Closing Time or such Date of Delivery, as the case may be, and such
termination shall be without liability of any party to any other party except as
provided in Section 4 and except that Sections 1, 6, 7 and 8 shall survive any
such termination and remain in full force and effect.  If any condition
specified in subsection (b) of this Section shall not have been fulfilled when
and as required to be fulfilled, this Agreement, or, in the case of any
condition to the sale of Option Securities on a Date of Delivery which is after
the Closing Time, the obligations of the Company to sell the relevant Option
Securities, may be terminated by the Company by notice to the Underwriter and
GVI at any time at or prior to Closing Time or such Date of Delivery, as the
case may be, and such termination shall be without liability of any party to any
other party except as provided in Section 4 and except that Sections 1, 6, 7 and
8 shall survive any such termination and remain in full force and effect.

     SECTION 6.  Indemnification.
                 --------------- 

     (a) Indemnification of the Underwriter by the Company.  The Company agrees
to indemnify and hold harmless the Underwriter and each person, if any, who
controls the Underwriter within the meaning of Section 15 of the 1933 Act or
Section 20 of the 1934 Act as follows:

          (i)  against any and all loss, liability, claim, damage and expense
     whatsoever, as incurred, arising out of any untrue statement or alleged
     untrue statement of a material

                                       24
<PAGE>
 
     fact contained in the ML&Co. Registration Statement (or any amendment
     thereto), including the Rule 430A Information and the Rule 434 Information,
     if applicable, or the omission or alleged omission therefrom of a material
     fact required to be stated therein or necessary to make the statements
     therein not misleading or arising out of any untrue statement or alleged
     untrue statement of a material fact contained in any ML&Co. preliminary
     prospectus or the ML&Co. Prospectus (or any amendment or supplement
     thereto), or the omission or alleged omission therefrom of a material fact
     necessary in order to make the statements therein, in the light of the
     circumstances under which they were made, not misleading;

          (ii)   against any and all loss, liability, claim, damage and expense
                 whatsoever, as incurred, to the extent of the aggregate amount
                 paid in settlement of any litigation, or any investigation or
                 proceeding by any governmental agency or body, commenced or
                 threatened, or of any claim whatsoever based upon any such
                 untrue statement or omission, or any such alleged untrue
                 statement or omission, referred to under (i) above; provided
                 that (subject to Section 6(e) below) any such settlement is
                 effected with the written consent of the Company; and

          (iii)  against any and all expense whatsoever, as incurred (including
                 the fees and disbursements of counsel chosen by the
                 Underwriter), reasonably incurred in investigating, preparing
                 or defending against any litigation, or any investigation or
                 proceeding by any governmental agency or body, commenced or
                 threatened, or any claim whatsoever based upon any such untrue
                 statement or omission, or any such alleged untrue statement or
                 omission, referred to under (i) above, to the extent that any
                 such expense is not paid under (i) or (ii) above;

provided, however, that this indemnity agreement shall not apply to any loss,
liability, claim, damage or expense to the extent arising out of any untrue
statement or omission or alleged untrue statement or omission made in reliance
upon and in conformity with written information furnished to the Company by the
Underwriter expressly for use in the ML&Co. Registration Statement (or any
amendment thereto), including the Rule 430A Information and the Rule 434
Information, if applicable, or any ML&Co. preliminary prospectus or the ML&Co.
Prospectus (or any amendment or supplement thereto).

     Insofar as this indemnity agreement may permit indemnification for
liabilities under the 1933 Act of any person who controls an underwriter within
the meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act and who,
at the date of this Agreement, is a director or officer of the Company or
controls the Company within the meaning of Section 15 of the 1933 Act or Section
20 of the 1934 Act, such indemnity agreement is subject to the undertaking of
the Company in the ML&Co. Registration Statement under Item 17 thereof.

     (b) Indemnification of the Underwriter and the Company by GVI.  GVI agrees
to indemnify and hold harmless (1) the Underwriter and each person, if any, who
controls the Underwriter within the meaning of Section 15 of the 1933 Act or
Section 20 of the 1934 Act and

                                       25
<PAGE>
 
(2) the Company and each person, if any, who controls the Company within the
meaning of Section 15 of the 1933 Act or Section 20 of the 1934 Act, as follows:

          (i)  against any and all loss, liability, claim, damage and expense
     whatsoever, as incurred, arising out of any untrue statement or alleged
     untrue statement of a material fact contained in the IMC Registration
     Statement (or any amendment thereto), or the omission or alleged omission
     therefrom of a material fact required to be stated therein or necessary to
     make the statements therein not misleading or arising out of any untrue
     statement or alleged untrue statement of a material fact contained in any
     IMC preliminary prospectus or the IMC Prospectus (or any amendment or
     supplement thereto), or the omission or alleged omission therefrom of a
     material fact necessary in order to make the statements therein, in the
     light of the circumstances under which they were made, not misleading;

          (ii)  against any and all loss, liability, claim, damage and expense
     whatsoever, as incurred, to the extent of the aggregate amount paid in
     settlement of any litigation, or any investigation or proceeding by any
     governmental agency or body, commenced or threatened, or of any claim
     whatsoever based upon any such untrue statement or omission, or any such
     alleged untrue statement or omission, referred to under (i) above; provided
     that (subject to Section 6(e) below) any such settlement is effected with
     the written consent of GVI; and

          (iii)  against any and all expense whatsoever, as incurred (including
     the fees and disbursements of counsel chosen by the Underwriter or the
     Company, as the case may be), reasonably incurred in investigating,
     preparing or defending against any litigation, or any investigation or
     proceeding by any governmental agency or body, commenced or threatened, or
     any claim whatsoever based upon any such untrue statement or omission, or
     any such alleged untrue statement or omission, referred to under (i) above,
     to the extent that any such expense is not paid under (i) or (ii) above;

provided, however, that this indemnity agreement shall apply only with respect
to untrue statements or omissions, or alleged untrue statements or omissions,
made in the IMC Registration Statement (or any amendment thereto) or any IMC
preliminary prospectus or the IMC Prospectus (or any amendment or supplement
thereto) in reliance upon and in conformity with written information furnished
to IMC by GVI expressly for use in the IMC Registration Statement (or any
amendment thereto) or any IMC preliminary prospectus or the IMC Prospectus (or
any amendment or supplement thereto).

     (c) Indemnification of the Company, Directors and Officers.  The
Underwriter agrees to indemnify and hold harmless the Company, its directors,
each of its officers who signed the ML&Co. Registration Statement, and each
person, if any, who controls the Company within the meaning of Section 15 of the
1933 Act or Section 20 of the 1934 Act against any and all loss, liability,
claim, damage and expense described in the indemnity contained in subsection (a)
of this Section, as incurred, but only with respect to untrue statements or
omissions, or alleged untrue statements or omissions, made in the ML&Co.
Registration Statement (or any amendment thereto), including the Rule 430A
Information and the Rule 434 Information, if applicable, or

                                       26
<PAGE>
 
any ML&Co. preliminary prospectus or the ML&Co. Prospectus (or any amendment or
supplement thereto) in reliance upon and in conformity with written information
furnished to the Company by the Underwriter expressly for use in the ML&Co.
Registration Statement (or any amendment thereto) or such ML&Co. preliminary
prospectus or the ML&Co. Prospectus (or any amendment or supplement thereto).

     (d) Actions against Parties; Notification.  Each indemnified party shall
give notice as promptly as reasonably practicable to each indemnifying party of
any action commenced against it in respect of which indemnity may be sought
hereunder, but failure to so notify an indemnifying party shall not relieve such
indemnifying party from any liability hereunder which it may have otherwise than
on account of this indemnity agreement.  In the case of parties indemnified
pursuant to Section 6(a) or clause (1) of Section 6(b) above, counsel to the
indemnified parties shall be selected by the Underwriter, and, in the case of
parties indemnified pursuant to clause (2) of Section 6(b) or Section 6(c)
above, counsel to the indemnified parties shall be selected by the Company.  An
indemnifying party may participate at its own expense in the defense of any such
action; provided, however, that counsel to the indemnifying party shall not
(except with the consent of the indemnified party) also be counsel to the
indemnified party.  In no event shall the indemnifying parties be liable for
fees and expenses of more than one counsel (in addition to any local counsel)
separate from their own counsel for all indemnified parties in connection with
any one action or separate but similar or related actions in the same
jurisdiction arising out of the same general allegations or circumstances.  No
indemnifying party shall, without the prior written consent of the indemnified
parties, settle or compromise or consent to the entry of any judgment with
respect to any litigation, or any investigation or proceeding by any
governmental agency or body, commenced or threatened, or any claim whatsoever in
respect of which indemnification or contribution could be sought under this
Section 6 or Section 7 hereof (whether or not the indemnified parties are actual
or potential parties thereto), unless such settlement, compromise or consent (i)
includes an unconditional release of each indemnified party from all liability
arising out of such litigation, investigation, proceeding or claim and (ii) does
not include a statement as to or an admission of fault, culpability or a failure
to act by or on behalf of any indemnified party.

     (e) Settlement without Consent if Failure to Reimburse.  If at any time an
indemnified party shall have requested an indemnifying party to reimburse the
indemnified party for fees and expenses of counsel, such indemnifying party
agrees that it shall be liable for any settlement of the nature contemplated by
Section 6(a)(ii) and 6(b)(ii) effected without its written consent if (i) such
settlement is entered into more than 45 days after receipt by such indemnifying
party of the aforesaid request, (ii) such indemnifying party shall have received
notice of the terms of such settlement at least 30 days prior to such settlement
being entered into and (iii) such indemnifying party shall not have reimbursed
such indemnified party in accordance with such request prior to the date of such
settlement.

     SECTION 7.  Contribution.
                 ------------ 

     (a) If the indemnification provided for in Sections 6(a) and 6(c) is for
any reason unavailable to or insufficient to hold harmless an indemnified party
in respect of any losses, liabilities, claims, damages or expenses referred to
therein, then the Company and the

                                       27
<PAGE>
 
Underwriter shall contribute to the aggregate amount of such losses,
liabilities, claims, damages and expenses incurred by such indemnified party, as
incurred, (i) in such proportion as is appropriate to reflect the relative
benefits received by the Company on the one hand and the Underwriter on the
other hand from the offering of the Securities pursuant to this Agreement or
(ii) if the allocation provided by clause (i) is not permitted by applicable
law, in such proportion as is appropriate to reflect not only the relative
benefits referred to in clause (i) above but also the relative fault of the
Company on the one hand and of the Underwriter on the other hand in connection
with the statements or omissions which resulted in such losses, liabilities,
claims, damages or expenses, as well as any other relevant equitable
considerations.  The relative benefits received by the Company on the one hand
and the Underwriter on the other hand in connection with the offering of the
Securities pursuant to this Agreement shall be deemed to be in the same
respective proportions as the total net proceeds from the offering of the
Securities pursuant to this Agreement (before deducting expenses) received by
the Company and the total underwriting discount received by the Underwriter, in
each case as set forth on the cover of the ML&Co. Prospectus, or, if Rule 434 is
used, the corresponding location on the ML&Co. Term Sheet, bear to the aggregate
initial public offering price of the Securities as set forth on such cover.  The
relative fault of the Company on the one hand and the Underwriter on the other
hand shall be determined by reference to, among other things, whether any such
untrue or alleged untrue statement of a material fact or omission or alleged
omission to state a material fact relates to information supplied by the Company
or by the Underwriter and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission.

     Notwithstanding the provisions of this Section 7(a), the Underwriter shall
not be required to contribute any amount in excess of the amount by which the
total price at which the Securities underwritten by it and distributed to the
public were offered to the public exceeds the amount of any damages which the
Underwriter has otherwise been required to pay by reason of any such untrue or
alleged untrue statement or omission or alleged omission.

     The Company and the Underwriter agree that it would not be just and
equitable if contribution pursuant to this Section 7(a) were determined by pro
rata allocation or by any other method of allocation which does not take account
of the equitable considerations referred to above in this Section 7(a).  The
aggregate amount of losses, liabilities, claims, damages and expenses incurred
by an indemnified party and referred to above in this Section 7(a) shall be
deemed to include any legal or other expenses reasonably incurred by such
indemnified party in investigating, preparing or defending against any
litigation, or any investigation or proceeding by any governmental agency or
body, commenced or threatened, or any claim whatsoever based upon any such
untrue or alleged untrue statement or omission or alleged omission.

     No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

     For purposes of this Section 7(a), each person, if any, who controls the
Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of
the 1934 Act shall have the same rights to contribution as the Underwriter, and
each director of the Company, each officer

                                       28
<PAGE>
 
of the Company who signed the ML&Co. Registration Statement, and each person, if
any, who controls the Company within the meaning of Section 15 of the 1933 Act
or Section 20 of the 1934 Act shall have the same rights to contribution as the
Company.

     (b) If the indemnification provided for in Section 6(b) hereof is for any
reason unavailable to or insufficient to hold harmless an indemnified party in
respect of any losses, liabilities, claims, damages or expenses referred to
therein, then GVI on the one hand and the Underwriter and the Company on the
other hand shall contribute to the aggregate amount of such losses, liabilities,
claims, damages and expenses incurred by such indemnified party, as incurred,
(i) in such proportion as is appropriate to reflect the relative benefits
received by GVI on the one hand and by the Underwriter and the Company on the
other hand from the offering of the Securities pursuant to this Agreement or
(ii) if the allocation provided by clause (i) is not permitted by applicable
law, in such proportion as is appropriate to reflect not only the relative
benefits referred to in clause (i) above but also the relative fault of GVI on
the one hand and of the Underwriter and the Company on the other hand in
connection with the statements or omissions which resulted in such losses,
liabilities, claims, damages or expenses, as well as any other relevant
equitable considerations.  The relative benefits received from the offering of
the Securities pursuant to this Agreement shall be deemed to be such that the
Underwriter and the Company shall be responsible for that portion of the
aggregate amount of such losses, liabilities, claims, damages and expenses
represented by the percentage that the total underwriting discount received by
the Underwriter, as set forth on the cover of the ML&Co. Prospectus, or, if Rule
434 is used, the corresponding location on the ML&Co. Term Sheet, bears to the
aggregate initial public offering price of the Securities as set forth on such
cover and GVI shall be responsible for the balance.  The relative fault of GVI
on the one hand and the Underwriter and the Company on the other hand shall be
determined by reference to, among other things, whether any such untrue or
alleged untrue statement of a material fact or omission or alleged omission to
state a material fact relates to information supplied by GVI on the one hand or
by the Underwriter or the Company on the other hand and the parties' relative
intent, knowledge, access to information and opportunity to correct or prevent
such statement or omission.

     Notwithstanding the provisions of this Section 7(b), the Underwriter and
the Company shall not be required to contribute any amount in excess of the
amount by which the total price at which the Securities underwritten by the
Underwriter and distributed to the public were offered to the public exceeds the
amount of any damages which the Underwriter and the Company have otherwise been
required to pay by reason of any such untrue or alleged untrue statement or
omission or alleged omission.

     GVI, the Underwriter and the Company agree that it would not be just and
equitable if contribution pursuant to this Section 7(b) were determined by pro
rata allocation or by any other method of allocation which does not take account
of the equitable considerations referred to above in this Section 7(b).  The
aggregate amount of losses, liabilities, claims, damages and expenses incurred
by an indemnified party and referred to above in this Section 7(b) shall be
deemed to include any legal or other expenses reasonably incurred by such
indemnified party in investigating, preparing or defending against any
litigation, or any investigation or proceeding by any governmental agency or
body, commenced or threatened, or any claim whatsoever based upon any such
untrue or alleged untrue statement or omission or alleged omission.

                                       29
<PAGE>
 
     No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

     For purposes of this Section 7(b), each person, if any, who controls the
Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of
the 1934 Act shall have the same rights to contribution as the Underwriter, and
each person, if any, who controls the Company within the meaning of Section 15
of the 1933 Act or Section 20 of the 1934 Act shall have the same rights to
contribution as the Company.

     SECTION 8.  Representations, Warranties and Agreements to Survive Delivery.
                 --------------------------------------------------------------
All representations, warranties and agreements contained in this Agreement or in
certificates of officers of the Company, IMC or GVI submitted pursuant hereto,
shall remain operative and in full force and effect, regardless of any
investigation made by or on behalf of the Underwriter or controlling person, or
by or on behalf of the Company or GVI, and shall survive delivery of the
Securities to the Underwriter.

     SECTION 9.  Termination of Agreement.
                 ------------------------ 

     (a) Termination; General.  The Underwriter may terminate this Agreement, by
notice to the Company and GVI, at any time at or prior to Closing Time (i) if
there has been, since the time of execution of this Agreement or since the
respective dates as of which information is given in the ML&Co. Prospectus, any
material adverse change in the condition, financial or otherwise, or in the
earnings, business affairs or business prospects of the Company and its
subsidiaries considered as one enterprise, whether or not arising in the
ordinary course of business, or (ii) if there has been, since the time of
execution of this Agreement, or since the respective dates as of which
information is given in the IMC Prospectus, any material adverse change in the
condition, financial or otherwise, or in the earnings, business affairs or
business prospects of IMC and its subsidiaries considered as one enterprise,
whether or not arising in the ordinary course of business, or (iii) if there has
occurred any material adverse change in the financial markets in the United
States, any outbreak of hostilities or escalation thereof or other calamity or
crisis or any change or development involving a prospective change in national
or international political, financial or economic conditions, in each case the
effect of which is such as to make it, in the judgment of the Underwriter,
impracticable to market the Securities or to enforce contracts for the sale of
the Securities, or (iv) if trading in any securities of the Company or in the
IMC Common Stock has been suspended or limited by the Commission or the New York
Stock Exchange, or if trading generally on the American Stock Exchange or the
New York Stock Exchange or in the Nasdaq National Market has been suspended or
limited, or minimum or maximum prices for trading have been fixed, or maximum
ranges for prices have been required, by any of said exchanges or by such system
or by order of the Commission, the NASD or any other governmental authority, or
(v) if a banking moratorium has been declared by either federal or New York
authorities.

     (b) Liabilities.  If this Agreement is terminated pursuant to this Section,
such termination shall be without liability of any party to any other party
except as provided in

                                       30
<PAGE>
 
Section 4 hereof, and provided further that Sections 1, 6, 7 and 8 shall survive
such termination and remain in full force and effect.

     SECTION 10. Notices.  All notices and other communications hereunder shall
                 -------                                                       
be in writing and shall be deemed to have been duly given if mailed or
transmitted by any standard form of telecommunication.  Notices to the
Underwriter shall be directed to it at Sears Tower Building, Suite 5500,
Chicago, Illinois 60606, attention of Todd Kaplan, Director; notices to the
Company shall be directed to it at 100 Church St., 12th Floor, New York, New
York 10007, attention of the Secretary, with a copy to the Treasurer at World
Financial Center, South Tower, New York, New York 10080-6105; and notices to GVI
shall be directed to it at Two North Riverside Plaza, Suite 1100, Chicago,
Illinois 60606, attention of Gus Athas.

     SECTION 11. Parties.  This Agreement shall each inure to the benefit of and
                 -------                                                        
be binding upon each of the Underwriter, the Company and GVI and their
respective successors.  Nothing expressed or mentioned in this Agreement is
intended or shall be construed to give any person, firm or corporation, other
than the parties hereto and their respective successors and the controlling
persons and officers and directors referred to in Sections 6 and 7 and their
heirs and legal representatives, any legal or equitable right, remedy or claim
under or in respect of this Agreement or any provision herein contained.  This
Agreement and all conditions and provisions hereof are intended to be for the
sole and exclusive benefit of the parties hereto and their respective
successors, and said controlling persons and officers and directors and their
heirs and legal representatives, and for the benefit of no other person, firm or
corporation.  No purchaser of Securities from the Underwriter shall be deemed to
be a successor by reason merely of such purchase.

     SECTION 12. GOVERNING LAW AND TIME.  THIS AGREEMENT SHALL BE GOVERNED BY
                 ----------------------                                      
AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.  SPECIFIED
TIMES OF DAY REFER TO NEW YORK CITY TIME.

     SECTION 13. Effect of Headings.  The Article and Section headings herein
                 ------------------                                          
and the Table of Contents are for convenience only and shall not affect the
construction hereof.

                                       31
<PAGE>
 
     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to the Company a counterpart hereof, whereupon this
instrument, along with all counterparts, will become a binding agreement among
the Underwriter, the Company and GVI in accordance with its terms.

                                    Very truly yours,

                                    MERRILL LYNCH & CO., INC.



                                    By_________________________________
                                     Name:
                                      Title:


                                    GVI HOLDINGS, INC.



                                    By_________________________________
                                      Name:
                                      Title:



CONFIRMED AND ACCEPTED,
  as of the date first above written:


MERRILL LYNCH, PIERCE, FENNER & SMITH
            INCORPORATED



By__________________________________
         Authorized Signatory

                                       32
<PAGE>
 
                                   SCHEDULE A


                            MERRILL LYNCH & CO., INC.

                      6 1/4% STRYPES/SM/ DUE JULY 1, 2001



          1.  The initial public offering price of the Securities shall be
     $38.25 per STRYPES.

          2.  The purchase price for the Securities to be paid by the
     Underwriter shall be $37.10 per STRYPES, being an amount equal to the
     initial public offering price set forth above less $1.15 per STRYPES.

          3.  The "Threshold Appreciation Price" with respect to the Securities
     shall be $46.28.



__________________________
/SM/  Service mark of Merrill Lynch & Co., Inc.

                                   Sch A - 1
<PAGE>
 
                                   SCHEDULE B



                              Robert M. Felsenthal
                               Marshall I. Smith
                               C. Steven Hoffman

                                   Sch B - 1
<PAGE>
 
                                                                       Exhibit A



                      FORM OF OPINION OF COMPANY'S COUNSEL
                          TO BE DELIVERED PURSUANT TO
                                SECTION 5(a)(3)



       (i) The Company has been duly incorporated and is validly existing as a
  corporation in good standing under the laws of the State of Delaware.

       (ii) The Company has corporate power and authority to own, lease and
  operate its properties and to conduct its business as described in the ML&Co.
  Prospectus and to enter into and perform its obligations under the
  Underwriting Agreement.

       (iii)  The Company is duly qualified as a foreign corporation to transact
  business and is in good standing in each jurisdiction in which such
  qualification is required, whether by reason of the ownership or leasing of
  property or the conduct of business, except where the failure so to qualify or
  to be in good standing would not result in a Material Adverse Effect.

       (iv) Merrill Lynch, Pierce, Fenner & Smith Incorporated ("MLPF&S") has
  been duly incorporated and is validly existing as a corporation in good
  standing under the laws of the State of Delaware, has corporate power and
  authority to own, lease and operate its properties and to conduct its business
  as described in the ML&Co. Prospectus and is duly qualified as a foreign
  corporation to transact business and is in good standing in the State of New
  York; all of the issued and outstanding capital stock of MLPF&S has been duly
  authorized and validly issued, is fully paid and non-assessable and, to the
  best of our knowledge, is owned by the Company, directly or through
  subsidiaries, free and clear of any security interest, mortgage, pledge, lien,
  encumbrance, claim or equity; none of the outstanding shares of capital stock
  of MLPF&S was issued in violation of the preemptive or similar rights of any
  securityholder of MLPF&S.

       (v) The Underwriting Agreement has been duly authorized, executed and
  delivered by the Company.

       (vi) The Indenture has been duly authorized, executed and delivered by
  the Company and (assuming the due authorization, execution and delivery
  thereof by the Trustee) constitutes a valid and binding agreement of the
  Company, enforceable against the Company in accordance with its terms, except
  as the enforcement thereof may be limited by bankruptcy, insolvency
  (including, without limitation, all laws relating to fraudulent transfers),
  reorganization, moratorium or similar laws affecting enforcement of creditors'
  rights generally and except as enforcement thereof is subject to general
  principles of equity (regardless of whether enforcement is considered in a
  proceeding in equity or at law).

                                      A-1
<PAGE>
 
       (vii)  The Securities are in the form contemplated by the Indenture, have
  been duly authorized by the Company and, assuming that the Securities have
  been duly authenticated by the Trustee in the manner described in its
  certificate delivered to you today (which fact such counsel need not determine
  by an inspection of the Securities), the Securities have been duly executed,
  issued and delivered by the Company and constitute valid and binding
  obligations of the Company, enforceable against the Company in accordance with
  their terms, except as the enforcement thereof may be limited by bankruptcy,
  insolvency (including, without limitation, all laws relating to fraudulent
  transfers), reorganization, moratorium or similar laws affecting enforcement
  of creditors' rights generally and except as enforcement thereof is subject to
  general principles of equity (regardless of whether enforcement is considered
  in a proceeding in equity or at law), and will be entitled to the benefits of
  the Indenture.

       (viii)  The Purchase Agreement has been duly authorized, executed and
  delivered by the Company and (assuming the due authorization, execution and
  delivery thereof by GVI) constitutes a valid and binding agreement of the
  Company and the ML&Co. Subsidiary, enforceable against the Company and the
  ML&Co. Subsidiary in accordance with its terms, except as the enforcement
  thereof may be limited by bankruptcy, insolvency (including, without
  limitation, all laws relating to fraudulent transfers), reorganization,
  moratorium or similar laws affecting enforcement of creditors' rights
  generally and except as enforcement thereof is subject to general principles
  of equity (regardless of whether enforcement is considered in a proceeding in
  equity or at law).

       (ix) The Indenture has been duly qualified under the 1939 Act.

       (x) The Securities, the Indenture and the Purchase Agreement conform in
  all material respects as to legal matters to the descriptions thereof
  contained in the ML&Co. Prospectus.

       (xi) The ML&Co. Registration Statement, including any ML&Co. Rule 462(b)
  Registration Statement, has been declared effective under the 1933 Act; any
  required filing of the ML&Co. Prospectus pursuant to Rule 424(b) has been made
  in the manner and within the time period required by Rule 424(b); and, to the
  best of our knowledge, no stop order suspending the effectiveness of the
  ML&Co. Registration Statement or any ML&Co. Rule 462(b) Registration Statement
  has been issued under the 1933 Act and no proceedings for that purpose have
  been instituted or are pending or threatened by the Commission.

       (xii)  The ML&Co. Registration Statement, including any ML&Co. Rule
  462(b) Registration Statement, the Rule 430A Information and the Rule 434
  Information, as applicable, the ML&Co. Prospectus, excluding the documents
  incorporated by reference therein, and each amendment or supplement to the
  ML&Co. Registration Statement and ML&Co. Prospectus, excluding the documents
  incorporated by reference therein, as of their respective effective or issue
  dates (other than the financial statements and supporting schedules included
  therein or omitted therefrom, and the Trustee's Statement of Eligibility on
  Form T-1 (the "Form T-1"), as to which we express no opinion) complied as to
  form in all material respects with the requirements of the 1933 Act and the
  1933 Act Regulations.

                                      A-2
<PAGE>
 
       (xiii)  The documents incorporated by reference in the ML&Co. Prospectus
  (other than the financial statements and supporting schedules included therein
  or omitted therefrom, as to which we express no opinion), when they became
  effective or were filed with the Commission, as the case may be, complied as
  to form in all material respects with the requirements of the 1933 Act or the
  1934 Act, as applicable, and the rules and regulations of the Commission
  thereunder.

       (xiv)  The IMC Registration Statement, including any IMC Rule 462(b)
  Registration Statement, has been declared effective under the 1933 Act; any
  required filing of the IMC Prospectus pursuant to Rule 424(b) has been made in
  the manner and within the time period required by Rule 424(b); and, to the
  best of our knowledge, no stop order suspending the effectiveness of the IMC
  Registration Statement or any IMC Rule 462(b) Registration Statement has been
  issued under the 1933 Act and no proceedings for that purpose have been
  instituted or are pending or threatened by the Commission.

       (xv) The IMC Registration Statement, including any IMC Rule 462(b)
  Registration Statement, the IMC Prospectus, excluding the documents
  incorporated by reference therein, and each amendment or supplement to the IMC
  Registration Statement and IMC Prospectus, excluding the documents
  incorporated by reference therein, as of their respective effective or issue
  dates (other than the financial statements and supporting schedules included
  therein or omitted therefrom, as to which we express no opinion) complied as
  to form in all material respects with the requirements of the 1933 Act and the
  1933 Act Regulations.

       (xvi)  No filing with, or authorization, approval, consent, license,
  order, registration, qualification or decree of, any court or governmental
  authority or agency, domestic or foreign (other than under the 1933 Act and
  the 1933 Act Regulations, which have been obtained, or as may be required
  under the securities or blue sky laws of the various states and except for the
  qualification of the Indenture under the 1939 Act, as to which we express no
  opinion) is necessary or required in connection with the due authorization,
  execution and delivery of the Underwriting Agreement by the Company or the due
  execution, delivery or performance of the Indenture or the Purchase Agreement
  by the Company or for the offering, issuance, sale or delivery of the
  Securities or for the due execution, delivery or performance of the Purchase
  Agreement by the ML&Co. Subsidiary.

       (xvii)  The execution, delivery and performance of the Underwriting
  Agreement, the Indenture, the Securities and the Purchase Agreement and the
  consummation of the transactions contemplated in the Underwriting Agreement,
  the Purchase Agreement and in the ML&Co. Registration Statement (including the
  issuance and sale of the Securities and the delivery of shares of IMC Common
  Stock pursuant thereto, the consummation of the Forward Purchase and the use
  of the proceeds from the sale of the Securities as described in the ML&Co.
  Prospectus under the caption "Supplemental Use of Proceeds") and compliance by
  the Company with its obligations under the Underwriting Agreement, the
  Indenture, the Securities and the Purchase Agreement and (B) the execution,
  delivery and performance by the ML&Co. Subsidiary of the Purchase Agreement
  and the consummation by the ML&Co. Subsidiary of the transactions contemplated
  therein and compliance by the ML&Co. Subsidiary with its obligations under the
  Purchase Agreement do not and will not, whether with or without the giving of
  notice or lapse

                                      A-3
<PAGE>
 
  of time or both, conflict with or constitute a breach of, or default or
  Repayment Event (as defined in Section 1(a)(xiii) of the Underwriting
  Agreement) under or result in the creation or imposition of any lien, charge
  or encumbrance upon any property or assets of the Company or any subsidiary
  pursuant to any contract, indenture, mortgage, deed of trust, loan or credit
  agreement, note, lease or any other agreement or instrument, known to us, to
  which the Company or any subsidiary is a party or by which it or any of them
  may be bound, or to which any of the property or assets of the Company or any
  subsidiary is subject (except for such conflicts, breaches or defaults or
  liens, charges or encumbrances that would not have a Material Adverse Effect),
  nor will such action result in any violation of the provisions of the charter
  or by-laws of the Company or any subsidiary, or any applicable law, statute,
  rule, regulation, judgment, order, writ or decree, known to us, of any
  government, government instrumentality or court, domestic or foreign, having
  jurisdiction over the Company or any subsidiary or any of their respective
  properties, assets or operations.

       We have participated in conferences with officers and representatives of
  the Company and IMC, representatives of the independent accountants of the
  Company and IMC, and the Underwriter at which the contents of the ML&Co.
  Registration Statement and Prospectus, the contents of the IMC Registration
  Statement and Prospectus and related matters were discussed and, although we
  are not passing upon or assuming responsibility for the accuracy, completeness
  or fairness of the statements contained or incorporated by reference in said
  Registration Statements and Prospectuses and have made no independent check or
  verification thereof, on the basis of the foregoing, nothing has come to our
  attention that would lead us to believe (i) that the ML&Co. Registration
  Statement or any amendment thereto, including the Rule 430A Information and
  Rule 434 Information (if applicable), (except for financial statements and
  schedules and other financial data included or incorporated by reference
  therein or omitted therefrom and the Form T-1, as to which we make no
  statement), at the time such ML&Co. Registration Statement or any such
  amendment became effective or at the date of the Underwriting Agreement,
  contained an untrue statement of a material fact or omitted to state a
  material fact required to be stated therein or necessary to make the
  statements therein not misleading or that the ML&Co. Prospectus or any
  amendment or supplement thereto (except for financial statements and schedules
  and other financial data included or incorporated by reference therein or
  omitted therefrom, as to which we make no statement), at the  time the ML&Co.
  Prospectus was issued, at the time any such amended or supplemented prospectus
  was issued or at the Closing Time, included or includes an untrue statement of
  a material fact or omitted or omits to state a material fact necessary in
  order to make the statements therein, in the light of the circumstances under
  which they were made, not misleading, or (ii) that the IMC Registration
  Statement or any amendment thereto, (except for financial statements and
  schedules and other financial data included or incorporated by reference
  therein or omitted therefrom, as to which we make no statement), at the time
  such IMC Registration Statement or any such amendment became effective,
  contained an untrue statement of a material fact or omitted to state a
  material fact required to be stated therein or necessary to make the
  statements therein not misleading or that the IMC Prospectus or any amendment
  or supplement thereto (except for financial statements and schedules and other
  financial data included or incorporated by reference therein or omitted
  therefrom, as to which we make no statement), at the time the IMC Prospectus
  was issued, at the time any such amended or supplemented prospectus was issued
  or at the Closing Time, included or includes an untrue statement of a material
  fact or omitted or omits to state a material

                                      A-4
<PAGE>
 
  fact necessary in order to make the statements therein, in the light of the
  circumstances under which they were made, not misleading.

  In rendering such opinion, such counsel may rely as to matters of fact (but
not as to legal conclusions), to the extent they deem proper, on certificates of
responsible officers of the Company and public officials.

                                      A-5
<PAGE>
 
                                                                       Exhibit B



                        FORM OF OPINION OF IMC'S COUNSEL
                          TO BE DELIVERED PURSUANT TO
                                SECTION 5(a)(4)


       (i) IMC has been duly incorporated and is validly existing as a
  corporation in good standing under the laws of the State of Delaware, has
  corporate power and authority to own, lease and operate its properties and to
  conduct its business as described in the IMC Prospectus and to enter into and
  perform its obligations under the Registration Agreement and is duly qualified
  as a foreign corporation to transact business and is in good standing in each
  jurisdiction in which such qualification is required, whether by reason of the
  ownership or leasing of property or the conduct of business, except where the
  failure so to qualify or to be in good standing would not result in a Material
  Adverse Effect.

       (ii) The shares of issued and outstanding capital stock of IMC have been
  duly authorized and validly issued and are fully paid and non-assessable; and
  none of the outstanding shares of capital stock of IMC was issued in violation
  of the preemptive or other similar rights of any securityholder of IMC.

       (iii)  Each Subsidiary has been duly incorporated and is validly existing
  as a corporation in good standing under the laws of the jurisdiction of its
  incorporation, has corporate power and authority to own, lease and operate its
  properties and to conduct its business as described in the IMC Prospectus and
  is duly qualified as a foreign corporation to transact business and is in good
  standing in each jurisdiction in which such qualification is required, whether
  by reason of the ownership or leasing of property or the conduct of business,
  except where the failure so to qualify or to be in good standing would not
  result in a Material Adverse Effect; except as otherwise disclosed in the IMC
  Registration Statement, all of the issued and outstanding capital stock of
  each Subsidiary has been duly authorized and validly issued, is fully paid and
  non-assessable and, to the best of our knowledge, is owned by IMC, directly or
  through subsidiaries, free and clear of any security interest, mortgage,
  pledge, lien, encumbrance, claim or equity; none of the outstanding shares of
  capital stock of any Subsidiary was issued in violation of the preemptive or
  similar rights of any securityholder of such Subsidiary.

       (iv) The Registration Agreement has been duly authorized, executed and
  delivered by IMC.

       (v) The IMC Registration Statement, including any IMC Rule 462(b)
  Registration Statement, has been declared effective under the 1933 Act; any
  required filing of the IMC Prospectus pursuant to Rule 424(b) has been made in
  the manner and within the time period required by Rule 424(b); and, to the
  best of our knowledge, no stop order suspending the

                                      B-1
<PAGE>
 
  effectiveness of the IMC Registration Statement or any IMC Rule 462(b)
  Registration Statement has been issued under the 1933 Act and no proceedings
  for that purpose have been instituted or are pending or threatened by the
  Commission.

       (vi) The IMC Registration Statement, including any IMC Rule 462(b)
  Registration Statement, the IMC Prospectus, excluding the documents
  incorporated by reference therein, and each amendment or supplement to the IMC
  Registration Statement and IMC Prospectus, excluding the documents
  incorporated by reference therein, as of their respective effective or issue
  dates (other than the financial statements and supporting schedules included
  therein or omitted therefrom, as to which we express no opinion) complied as
  to form in all material respects with the requirements of the 1933 Act and the
  1933 Act Regulations.

       (vii)  The documents incorporated by reference in the IMC Prospectus
  (other than the financial statements and supporting schedules included therein
  or omitted therefrom, as to which we express no opinion), when they were filed
  with the Commission, complied as to form in all material respects with the
  requirements of the 1934 Act and the rules and regulations of the Commission
  thereunder.

       (viii)  The form of certificate used to evidence the IMC Common Stock
  complies in all material respects with all applicable statutory requirements,
  with any applicable requirements of the charter and by-laws of IMC and the
  requirements of the New York Stock Exchange.

       (ix) To the best of our knowledge, there is not pending or threatened any
  action, suit, proceeding, inquiry or investigation, to which IMC or any
  subsidiary is a party, or to which the property of IMC or any subsidiary is
  subject, before or brought by any court or governmental agency or body,
  domestic or foreign, which might reasonably be expected to result in a
  Material Adverse Effect, or which might reasonably be expected to materially
  and adversely affect the properties or assets thereof or the consummation of
  the transactions contemplated in the Registration Agreement or the performance
  by IMC of its obligations thereunder.

       (x) The information in the Prospectus under "RISK FACTORS--Sterlington
  Litigation," "--Antitrust Litigation" and "--FTC Phosphate Operations Inquiry"
  and under "Description of Capital Stock," in the Registration Statement under
  Items 14 and 15, in the Company's Annual Report on Form 10-K for the fiscal
  year ended June 30, 1995 under Part I, Item 3, and in the Company's Quarterly
  Reports on Form 10-Q for the quarters ended September 30, 1995, December 31,
  1995 and March 31, 1996 under Part II, Item 1, to the extent that it
  constitutes matters of law, summaries of legal matters, IMC's charter and
  bylaws, IMC's rights agreement or legal proceedings, or legal conclusions, has
  been reviewed by us and is correct in all material respects.

       (xi) To the best of our knowledge, there are no statutes or regulations,
  and no legal or governmental proceedings pending or threatened to which IMC or
  any of its subsidiaries is a party or to which any of the properties of IMC or
  any of its subsidiaries is subject, that are required to be described in the
  IMC Prospectus that are not described as required.

                                      B-2
<PAGE>
 
       (xii)  All descriptions in the IMC Registration Statement of contracts
  and other documents to which IMC or its subsidiaries are a party are accurate
  in all material respects; to the best of our knowledge, there are no
  franchises, contracts, indentures, mortgages, loan agreements, notes, leases
  or other instruments required to be described or referred to in the IMC
  Registration Statement or to be filed as exhibits thereto other than those
  described or referred to therein or filed or incorporated by reference as
  exhibits thereto, and the descriptions thereof or references thereto are
  correct in all material respects.

       (xiii)  No filing with, or authorization, approval, consent, license,
  order, registration, qualification or decree of, any court or governmental
  authority or agency, domestic or foreign, (other than under the 1933 Act and
  the 1933 Act Regulations, which have been obtained, or as may be required
  under the securities or blue sky laws of the various states, as to which we
  express no opinion) is necessary or required in connection with the due
  authorization, execution, and delivery by IMC of the Registration Agreement or
  the performance by IMC of its obligations thereunder.

       (xiv) The execution, delivery and performance of the Registration
  Agreement and the consummation of the transactions contemplated in the
  Registration Agreement and in the IMC Registration Statement and compliance by
  IMC with its obligations under the Registration Agreement do not and will not,
  whether with or without the giving of notice or lapse of time or both,
  conflict with or constitute a breach of, or default or Repayment Event (as
  defined in Section 1(a)(xi) of the Registration Agreement) under or result in
  the creation or imposition of any lien, charge or encumbrance upon any
  property or assets of IMC or any subsidiary pursuant to, any contract,
  indenture, mortgage, deed of trust, loan or credit agreement, note, lease or
  any other agreement or instrument, known to us, to which IMC or any subsidiary
  is a party or by which it or any of them may be bound, or to which any of the
  property or assets of IMC or any subsidiary is subject (except for such
  conflicts, breaches or defaults or liens, charges or encumbrances that would
  not have a Material Adverse Effect), nor will such action result in any
  violation of the provisions of the charter or by-laws of IMC or any
  subsidiary, or any applicable law, statute, rule, regulation, judgment, order,
  writ or decree, known to us, of any government, government instrumentality or
  court, domestic or foreign, having jurisdiction over IMC or any subsidiary or
  any of their respective properties, assets or operations.

       We have participated in conferences with officers and representatives of
  IMC, representatives of the independent accountants of IMC, and the
  Underwriter at which the contents of the IMC Registration Statement and the
  IMC Prospectus and related matters were discussed and, although we are not
  passing upon or assuming responsibility for the accuracy, completeness or
  fairness of the statements contained or incorporated by reference in the IMC
  Registration Statement and the IMC Prospectus and have made no independent
  check or verification thereof except as described in paragraph (x) above, on
  the basis of the foregoing, nothing has come to our attention that would lead
  us to believe that the IMC Registration Statement or any amendment thereto
  (except for financial statements and schedules and other financial data
  included or incorporated by reference therein or omitted therefrom, as to
  which we make no statement), at the time such IMC Registration Statement or
  any such amendment became effective, contained an untrue statement of a
  material fact or omitted to state a material fact required to be stated
  therein or necessary to make the statements therein not misleading or that the
  IMC Prospectus

                                      B-3
<PAGE>
 
  or any amendment or supplement thereto (except for financial statements and
  schedules and other financial data included or incorporated by reference
  therein or omitted therefrom, as to which we need make no statement), at the
  time the IMC Prospectus was issued, at the time any such amended or
  supplemented prospectus was issued or at the Closing Time, included or
  includes an untrue statement of a material fact or omitted or omits to state a
  material fact necessary in order to make the statements therein, in the light
  of the circumstances under which they were made, not misleading.

       [In rendering such opinion, such counsel may rely (A) as to matters
  involving the application of laws other than the laws of the State of New
  York, the corporate laws of the State of Delaware or the federal laws of the
  United States of America, to the extent such counsel deems proper and
  specified in such opinion, upon the opinion of other counsel whom such counsel
  believes to be reliable, provided that such counsel furnishes copies thereof
  to the Underwriter and states that such opinion of such local counsel is
  satisfactory in form and substance and the Underwriter and counsel for the
  Underwriter are entitled to rely thereon, and (B) as to matters of fact (but
  not as to legal conclusions), to the extent they deem proper, on certificates
  of responsible officers of IMC and public officials.  As used in this Exhibit
  B, the terms "Material Adverse Effect," "Subsidiary" and "Subsidiaries" shall
  have the meanings ascribed to them in the Registration Agreement.]

                                      B-4
<PAGE>
 
                                                                       Exhibit C



                        FORM OF OPINION OF GVI'S COUNSEL
                          TO BE DELIVERED PURSUANT TO
                                SECTION 5(a)(5)



       (i) GVI has been duly incorporated and is validly existing as a
  corporation in good standing under the laws of the jurisdiction of its
  incorporation and has corporate power and authority to enter into and perform
  its obligations under the Underwriting Agreement and the Purchase Agreement.

       (ii) GVI is the sole registered owner of and has all rights in and to at
  least 6,510,268 shares of IMC Common Stock, free and clear of any security
  interest, mortgage, pledge, lien, encumbrance, claim or equity.

       (iii)  The Underwriting Agreement has been duly authorized, executed and
  delivered by GVI.

       (iv) The Purchase Agreement has been duly authorized, executed and
  delivered by GVI and (assuming the due authorization, execution and delivery
  thereof by the Company and the ML&Co. Subsidiary) constitutes a valid and
  binding agreement of GVI, enforceable against GVI in accordance with its
  terms, except as the enforcement thereof may be limited by bankruptcy,
  insolvency (including, without limitation, all laws relating to fraudulent
  transfers), reorganization, moratorium or similar laws affecting enforcement
  of creditors' rights generally and except as enforcement thereof is subject to
  general principles of equity (regardless of whether enforcement is considered
  in a proceeding in equity or at law).

       (v) The execution, delivery and performance by GVI of the Underwriting
  Agreement and the Purchase Agreement and the consummation by GVI of the
  transactions contemplated therein and compliance by GVI with its obligations
  thereunder have been duly authorized by all necessary corporate action and do
  not and will not, whether with or without the giving of notice or lapse of
  time or both, conflict with or constitute a breach of, or default or GVI
  Repayment Event under or result in the creation or imposition of any lien,
  charge or encumbrance upon any property or assets of GVI or any of its
  subsidiaries pursuant to, any contract, indenture, mortgage, deed of trust,
  loan or credit agreement, note, lease or any other agreement or instrument,
  known to us, to which GVI or any of its subsidiaries is a party or by which it
  or any of them may be bound, or to which any of the property or assets of GVI
  or any of its subsidiaries is subject (except for such conflicts, breaches or
  defaults or liens, charges or encumbrances that would not, singly or in the
  aggregate, materially and adversely affect the ability of GVI to perform its
  obligations under the Underwriting Agreement or the Purchase

                                      C-1
<PAGE>
 
  Agreement), nor will such action result in any violation of the provisions of
  the charter or by-laws of GVI or any of its subsidiaries, or any applicable
  law, statute, rule, regulation, judgment, order, writ or decree, known to us,
  of any government, government instrumentality or court, domestic or foreign,
  having jurisdiction over GVI or any of its subsidiaries or any of their
  respective assets, properties or operations (except for such violations that
  would not, singly or in the aggregate, materially and adversely affect the
  ability of GVI to perform its obligations under the Underwriting Agreement or
  the Purchase Agreement).

       (vi) To the best of our knowledge, no filing with, or authorization,
  approval, consent, license, order, registration, qualification or decree of,
  any court or governmental authority or agency (other than under the 1933 Act
  and the 1933 Act Regulations or as may be required under the securities or
  blue sky laws of the various states, as to which we express no opinion) is
  necessary or required in connection with the due authorization, execution and
  delivery by GVI of the Underwriting Agreement or the Purchase Agreement or the
  performance by GVI of its obligations thereunder.

       We have participated in conferences with officers and representatives of
  GVI, IMC and the Underwriter at which the contents of the IMC Registration
  Statement and the IMC Prospectus relating to GVI were discussed and, although
  we are not passing upon or assuming responsibility for the accuracy,
  completeness or fairness of the statements contained in the IMC Registration
  Statement and the IMC Prospectus relating to GVI and have made no independent
  check or verification thereof, on the basis of the foregoing, nothing has come
  to our attention that would lead us to believe that the IMC Registration
  Statement or any amendment thereto (only with respect to the information
  included therein or omitted therefrom relating to GVI), at the time such IMC
  Registration Statement or any such amendment became effective, contained an
  untrue statement of a material fact or omitted to state a material fact
  required to be stated therein or necessary to make the statements therein not
  misleading or that the IMC Prospectus or any amendment or supplement thereto
  (only with respect to the information included therein or omitted therefrom
  relating to GVI), at the time the IMC Prospectus was issued, at the time any
  such amended or supplemented prospectus was issued or at the Closing Time,
  included or includes an untrue statement of a material fact or omitted or
  omits to state a material fact necessary in order to make the statements
  therein, in the light of the circumstances under which they were made, not
  misleading.

       [In rendering such opinion, such counsel may (A) rely as to matters
  involving the application of laws other than the laws of the State of
  Illinois, the corporate laws of the State of Delaware or the federal laws of
  the United States of America, to the extent such counsel deems proper and
  specified in such opinion, upon the opinion of other counsel whom such counsel
  believes to be reliable, provided that such counsel furnishes copies thereof
  to the Underwriter and states that such opinion of such local counsel is
  satisfactory in form and substance and the Underwriter and counsel for the
  Underwriter are entitled to rely thereon, (B) assume that the laws of the
  State of New York, to the extent applicable to such opinion, will be applied
  in a manner similar to, and consistent with, the laws of the State of Illinois
  and (C) rely as to matters of fact (but not as to legal conclusions), to the
  extent they deem proper, on certificates of responsible officers of GVI and
  public officials.]
 

                                      C-2
<PAGE>
 
               [Form of lock-up from directors, officers or other
                   stockholders pursuant to Section 5(a)(16)]

                                                                       Exhibit D

                                 ___________, 1996


Merrill Lynch, Pierce, Fenner & Smith
            Incorporated,
North Tower
World Financial Center
New York, New York  10281-1209

     Re:  Proposed Public Offering of STRYPES by Merrill Lynch & Co. Inc.
          ---------------------------------------------------------------

Ladies and Gentlemen:

     The undersigned, a stockholder [and an officer and/or director] of IMC
Global Inc., a Delaware corporation (the "Company"), understands that Merrill
Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated ("Merrill
Lynch") proposes to enter into an Underwriting Agreement (the "Underwriting
Agreement") with Merrill Lynch & Co., Inc. ("ML&Co.") and GVI Holdings, Inc.
providing for the public offering of ML&Co.'s Structured Yield Product
Exchangeable for Stock/sm/, 6 1/4% STRYPES/sm/ due July 1, 2001, payable at
maturity with shares of Common Stock, par value $1.00 per share (the "IMC Common
Stock"), of the Company. For good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the undersigned agrees with
Merrill Lynch that, during a period of 90 days from the date of the Underwriting
Agreement, the undersigned will not, without the prior written consent of
Merrill Lynch, offer, sell, contract to sell or otherwise dispose of, directly
or indirectly, any shares of IMC Common Stock or any securities convertible
into, exchangeable for or repayable with shares of IMC Common Stock, whether now
owned or hereafter acquired by the undersigned or with respect to which the
undersigned has or hereafter acquires the power of disposition, or cause to be
filed any registration statement under the Securities Act of 1933, as amended,
with respect to any of the foregoing; provided that, notwithstanding the
foregoing, during such 90-day period the undersigned may sell, without the prior
written consent of Merrill Lynch, the greater of (i) 25,000 shares of IMC Common
Stock and (ii) 25% of the total number of shares of IMC Common Stock which the
undersigned either owns or has the power of disposition as of the date hereof.

                                    Very truly yours,


                                    Signature:

                                    Print Name:

                                      D-1

<PAGE>
 
                                                                    EXHIBIT 1(b)


________________________________________________________________________________
________________________________________________________________________________



                                IMC GLOBAL INC.

                            (a Delaware corporation)



                             REGISTRATION AGREEMENT
                             ----------------------



                              Dated:  July 2, 1996


________________________________________________________________________________
________________________________________________________________________________
<PAGE>
 
                               Table of Contents
<TABLE>

<S>                          <C>                                                 <C>
REGISTRATION AGREEMENT.........................................................   1
     SECTION 1.              Representations and Warranties....................   3
          (a)                Representations and Warranties by the Company.....   3
               (i)           Compliance with Registration Requirements.........   3
               (ii)          Incorporated Documents............................   4
               (iii)         Independent Accountants...........................   4
               (iv)          Financial Statements..............................   4
               (v)           No Material Adverse Change in Business............   5
               (vi)          Good Standing of the Company......................   5
               (vii)         Good Standing of Subsidiaries.....................   5
               (viii)        Capitalization....................................   6
               (ix)          Description of Common Stock.......................   6
               (x)           Authorization of Agreement........................   6
               (xi)          Absence of Defaults and Conflicts.................   6
               (xii)         Absence of Labor Dispute..........................   6
               (xiii)        Absence of Proceedings............................   7
               (xiv)         Accuracy of Exhibits..............................   7
               (xv)          Possession of Intellectual Property...............   7
               (xvi)         Absence of Further Requirements...................   7
               (xvii)        Possession of Licenses and Permits................   7
               (xviii)       Title to Property.................................   8
               (xix)         Compliance with Cuba Act..........................   8
               (xx)          Investment Company Act............................   8
               (xxi)         Environmental Laws................................   8
          (b)                Officer's Certificates............................   9
     SECTION 2.              Covenants of the Company..........................   9
          (a)                Compliance with Securities Regulations and           
                             Commission Requests...............................   9
          (b)                Filing of Amendments..............................   9
          (c)                Delivery of IMC Registration Statements...........  10
          (d)                Delivery of IMC Prospectuses......................  10
          (e)                Continued Compliance with Securities Laws.........  10
          (f)                Blue Sky Qualifications...........................  11
          (g)                Rule 158..........................................  11
          (h)                Restriction on Sale of Securities by the Company..  11
          (i)                Restriction on Sale of Securities by Directors....  11
          (j)                Reporting Requirements............................  12
     SECTION 3.              Payment of Expenses...............................  12
          (a)                Expenses..........................................  12
     SECTION 4.              Indemnification...................................  12
          (a)                Indemnification of Underwriter and ML&Co..........  12
          (b)                Indemnification of Company, Directors, Officers...  13
          (c)                Actions against Parties; Notification.............  13
          (d)                Settlement without Consent if Failure to Reimburse  14

</TABLE>

                                       i
<PAGE>
 
<TABLE>

<S>                          <C>                                                 <C>
     SECTION 5.              Contribution......................................  14
     SECTION 6.              Representations, Warranties and Agreements to
                             Survive Delivery..................................  15
     SECTION 7.              Termination.......................................  16
     SECTION 8.              Notices...........................................  16
     SECTION 9.              Parties...........................................  16
     SECTION 10.             GOVERNING LAW.....................................  16
     SECTION 11.             Effect of Headings................................  16
 
     SCHEDULE A...........................................................  Sch A-1
</TABLE>

                                       ii
<PAGE>
 
                                IMC GLOBAL INC.

                            (a Delaware corporation)



                             REGISTRATION AGREEMENT
                             ----------------------

                                                                    July 2, 1996


MERRILL LYNCH & CO.
Merrill Lynch, Pierce, Fenner & Smith
            Incorporated
North Tower
World Financial Center
New York, New York  10281-1209

MERRILL LYNCH & CO., INC.
North Tower
World Financial Center
New York, New York  10281-1209


Ladies and Gentlemen:

     IMC Global Inc., a Delaware corporation (the "Company"), confirms its
agreement with Merrill Lynch & Co., Inc., a Delaware corporation ("ML&Co."), and
Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated (the
"Underwriter"), in connection with the proposed issue and sale by ML&Co. to the
Underwriter, pursuant to an underwriting agreement, dated the date hereof (the
"Underwriting Agreement"), among ML&Co., GVI Holdings, Inc.,  a Delaware
corporation ("GVI"), and the Underwriter, of an aggregate of 5,661,119 of
ML&Co.'s Structured Yield Product Exchangeable for Stock/SM/, 6 1/4% STRYPES/SM/
Due July 1, 2001 (each, a "STRYPES"), payable at maturity by delivery of shares
of common stock, par value $1.00 per share (the "IMC Common Stock"), of the
Company, and, at the option of the Underwriter, all or any part of 849,167
additional STRYPES to cover over-allotments, if any.

_______________

/SM/ Service mark of Merrill Lynch & Co., Inc.

                                       1
<PAGE>
 
The aforesaid 5,661,119 STRYPES (the "Initial Securities") to be purchased by
the Underwriter and all or any part of the 849,167 STRYPES subject to the option
described in Section 2(b) of the Underwriting Agreement (the "Option
Securities") are hereinafter called, collectively, the "Securities."
Capitalized terms used herein and not otherwise defined shall have the meanings
ascribed to them in the Underwriting Agreement.

     The Company understands that the Underwriter proposes to make a public
offering of the Securities as soon as the Underwriter deems advisable after this
Agreement and the Underwriting Agreement have been executed and delivered.  The
Company acknowledges that the execution and delivery of this Agreement is a
condition to the execution and delivery of the Underwriting Agreement by the
Underwriter and ML&Co. and that, in consideration of the execution and delivery
of the Underwriting Agreement by the Underwriter and ML&Co., the Company is
willing to make the representations, warranties and covenants herein contained.

     The Company has filed with the Securities and Exchange Commission (the
"Commission") a registration statement on Form S-3 (No. 333-04831) covering the
registration under the Securities Act of 1933, as amended (the "1933 Act"), of
the shares of IMC Common Stock deliverable upon payment and discharge of the
Securities, including the related preliminary prospectus or prospectuses.  Each
prospectus used before such registration statement became effective is herein
called an "IMC preliminary prospectus."  Such registration statement, including
the exhibits thereto, the schedules thereto, if any, and the documents
incorporated by reference therein pursuant to Item 12 of Form S-3 under the 1933
Act, at the time it became effective, is herein called the "IMC Registration
Statement."  Any registration statement filed pursuant to Rule 462(b) of the
rules and regulations of the Commission under the 1933 Act (the "1933 Act
Regulations") is herein referred to as the "IMC Rule 462(b) Registration
Statement," and after such filing the term "IMC Registration Statement" shall
include the IMC Rule 462(b) Registration Statement.  The final prospectus,
including the documents incorporated by reference therein pursuant to Item 12 of
Form S-3 under the 1933 Act, in the form first furnished to the Underwriter for
use in connection with the offering of the Securities is herein called the "IMC
Prospectus."  For purposes of this Agreement, all references to the IMC
Registration Statement, any IMC preliminary prospectus, the IMC Prospectus or
any amendment or supplement to any of the foregoing shall be deemed to include
the copy filed with the Commission pursuant to its Electronic Data Gathering,
Analysis and Retrieval system ("EDGAR").

     All references in this Agreement to financial statements and schedules and
other information which are "contained," "included" or "stated" in the IMC
Registration Statement, any IMC preliminary prospectus or the IMC Prospectus (or
other references of like import) shall be deemed to mean and include all such
financial statements and schedules and other information which are incorporated
by reference in the IMC Registration Statement, any IMC preliminary prospectus
or the IMC Prospectus, as the case may be; and all references in this Agreement
to amendments or supplements to the IMC Registration Statement, any IMC
preliminary prospectus or the IMC Prospectus shall be deemed to mean and include
the filing of any document under the Securities Exchange Act of 1934, as amended
(the "1934 Act"), which is incorporated by reference in the IMC Registration
Statement, such IMC preliminary prospectus or the IMC Prospectus, as the case
may be.

                                       2
<PAGE>
 
     Prior to the closing under the Underwriting Agreement, ML&Co., Merrill
Lynch Mortgage Capital Inc., a wholly-owned subsidiary of ML&Co., and GVI will
enter into a contract, pursuant to which GVI will agree to sell and ML&Co. will
agree to purchase, immediately prior to the maturity date of the Securities, the
Maturity Consideration (as defined in the Supplemental Indenture) required by
ML&Co. to pay and discharge all of the Securities at maturity as described in
the ML&Co. Prospectus, subject to GVI's right to require that the obligations
thereunder be satisfied by a cash payment based on the value of such Maturity
Consideration.


     SECTION 1.  Representations and Warranties.
                 ------------------------------ 

     (a)  Representations and Warranties by the Company.  The Company represents
and warrants to each of the Underwriter and to ML&Co. as of the date hereof, as
of the Closing Time referred to in Section 2(c) of the Underwriting Agreement,
and as of each Date of Delivery (if any) referred to in Section 2(b) of the
Underwriting Agreement, and agrees with each of the Underwriter and ML&Co. as
follows:

          (i)  Compliance with Registration Requirements.  The Company meets the
               -----------------------------------------                        
     requirements for the use of Form S-3 under the 1933 Act.  Each of the IMC
     Registration Statement and any IMC Rule 462(b) Registration Statement has
     become effective under the 1933 Act and no stop order suspending the
     effectiveness of the IMC Registration Statement or any IMC Rule 462(b)
     Registration Statement has been issued under the 1933 Act and no
     proceedings for that purpose have been instituted or are pending or, to the
     knowledge of the Company, are contemplated by the Commission, and any
     request on the part of the Commission for additional information has been
     complied with.

          At the respective times the IMC Registration Statement, any IMC Rule
     462(b) Registration Statement and any post-effective amendments thereto
     became effective and at the Closing Time (and, if any Option Securities are
     purchased, at the Date of Delivery), the IMC Registration Statement, the
     IMC Rule 462(b) Registration Statement and any amendments and supplements
     thereto complied and will comply in all material respects with the
     requirements of the 1933 Act and the 1933 Act Regulations and did not and
     will not contain an untrue statement of a material fact or omit to state a
     material fact required to be stated therein or necessary to make the
     statements therein not misleading.  Neither the IMC Prospectus nor any
     amendments or supplements thereto, at the time the IMC Prospectus or any
     such amendment or supplement was issued and at the Closing Time (and, if
     any Option Securities are purchased, at the Date of Delivery), included or
     will include an untrue statement of a material fact or omitted or will omit
     to state a material fact necessary in order to make the statements therein,
     in the light of the circumstances under which they were made, not
     misleading.  The representations and warranties in this subsection shall
     not apply to statements in or omissions from the IMC Registration Statement
     or IMC Prospectus made in reliance upon and in conformity with information
     furnished to the Company in writing by the Underwriter, ML&Co. or GVI
     expressly for use in the IMC Registration Statement or IMC Prospectus.

                                       3
<PAGE>
 
          Each IMC preliminary prospectus and the IMC Prospectus filed as part
     of the IMC Registration Statement as originally filed or as part of any
     amendment thereto, or filed pursuant to Rule 424 under the 1933 Act,
     complied when so filed in all material respects with the 1933 Act
     Regulations and, if applicable, each IMC preliminary prospectus and the IMC
     Prospectus delivered to the Underwriter for use in connection with the
     offering of the Securities was identical to the electronically transmitted
     copies thereof filed with the Commission pursuant to EDGAR, except to the
     extent permitted by Regulation S-T.

          (ii)  Incorporated Documents.  The documents incorporated or deemed to
                ----------------------                                          
     be incorporated by reference in the IMC Registration Statement and the IMC
     Prospectus, when they became effective or at the time they were or
     hereafter are filed with the Commission, complied and will comply in all
     material respects with the requirements of the 1934 Act and the rules and
     regulations of the Commission thereunder (the "1934 Act Regulations"), and,
     when read together with the other information in the IMC Prospectus, at the
     time the IMC Registration Statement and any post-effective amendments
     thereto became effective, at the time the IMC Prospectus was issued and at
     the Closing Time (and if any Option Securities are purchased, at the Date
     of Delivery), did not and will not contain an untrue statement of a
     material fact or omit to state a material fact required to be stated
     therein or necessary to make the statements therein not misleading.

          (iii)  Independent Accountants.  The accountants who certified the
                 -----------------------                                    
     financial statements and supporting schedules of the Company and its
     subsidiaries, and of The Vigoro Corporation and its subsidiaries
     ("Vigoro"), included in the IMC Registration Statement are independent
     public accountants as required by the 1933 Act and the 1933 Act
     Regulations.

          (iv)  Financial Statements.  The financial statements of the Company
                --------------------                                          
     (including the financial statements giving retroactive effect to the merger
     of the Company and Vigoro) included in the IMC Registration Statement and
     the IMC Prospectus, together with the related schedules and notes, present
     fairly the financial position of the Company and its consolidated
     subsidiaries at the dates indicated and the statement of operations,
     stockholders' equity and cash flows of the Company and its consolidated
     subsidiaries for the periods specified; said financial statements have been
     prepared in conformity with generally accepted accounting principles
     ("GAAP") applied on a consistent basis throughout the periods involved.
     The financial statements of Vigoro included in the IMC Registration
     Statement and the IMC Prospectus, together with the related notes, present
     fairly the financial position of Vigoro and its consolidated subsidiaries
     at the dates indicated and the statement of operations, stockholders'
     equity and cash flows of Vigoro and its consolidated subsidiaries for the
     periods specified; said financial statements have been prepared in
     conformity with GAAP applied on a consistent basis throughout the periods
     involved.  The supporting schedules, if any, included in the IMC
     Registration Statement present fairly in accordance with GAAP the
     information required to be stated therein.  The selected consolidated
     financial information and the summary selected consolidated financial
     information included in the IMC Prospectus present fairly the 

                                       4
<PAGE>
 
     information shown therein and have been compiled on a basis consistent with
     that of the audited financial statements included in the IMC Registration
     Statement. The pro forma financial statements and the other pro forma
     financial information of the Company and its subsidiaries and the related
     notes thereto included in the IMC Registration Statement and the IMC
     Prospectus present fairly in accordance with GAAP the information shown
     therein, have been prepared in accordance with the Commission's rules and
     guidelines with respect to pro forma financial statements and have been
     properly compiled on the bases described therein, and the assumptions used
     in the preparation thereof are reasonable and the adjustments used therein
     are appropriate to give effect to the transactions and circumstances
     referred to therein.

          (v)  No Material Adverse Change in Business.  Since the respective
               --------------------------------------                       
     dates as of which information is given in the IMC Registration Statement
     and the IMC Prospectus, except as otherwise stated therein or contemplated
     thereby, (A) there has been no material adverse change in the condition,
     financial or otherwise, or in the earnings, business affairs or business
     prospects of the Company and its subsidiaries considered as one enterprise,
     whether or not arising in the ordinary course of business (a "Material
     Adverse Effect"), (B) there have been no transactions entered into by the
     Company or any of its subsidiaries, which are material with respect to the
     Company and its subsidiaries considered as one enterprise, other than those
     in the ordinary course of business, and (C) except for regular quarterly
     dividends on its outstanding common stock, there has been no dividend or
     distribution of any kind declared, paid or made by the Company on any class
     of its capital stock.

          (vi)  Good Standing of the Company.  The Company has been duly
                ----------------------------                            
     organized and is validly existing as a corporation in good standing under
     the laws of the State of Delaware and has corporate power and authority to
     own, lease and operate its properties and to conduct its business as
     described in the IMC Prospectus and to enter into and perform its
     obligations under this Agreement; and the Company is duly qualified as a
     foreign corporation to transact business and is in good standing in each
     other jurisdiction in which such qualification is required, whether by
     reason of the ownership or leasing of property or the conduct of business,
     except where the failure so to qualify or to be in good standing would not
     result in a Material Adverse Effect.

          (vii)  Good Standing of Subsidiaries.  Each "significant subsidiary"
                 -----------------------------                                
     of the Company (as such term is defined in Rule 1-02 of Regulation S-X)
     (each a "Subsidiary" and, collectively, the "Subsidiaries") has been duly
     organized and is validly existing as a corporation in good standing under
     the laws of the jurisdiction of its incorporation, has corporate power and
     authority to own, lease and operate its properties and to conduct its
     business as described in the IMC Prospectus and is duly qualified as a
     foreign corporation to transact business and is in good standing in each
     jurisdiction in which such qualification is required, whether by reason of
     the ownership or leasing of property or the conduct of business, except
     where the failure so to qualify or to be in good standing would not result
     in a Material Adverse Effect; except as otherwise disclosed in the IMC
     Registration Statement, all of the issued and outstanding capital stock of
     each such Subsidiary has been duly authorized and validly issued, is fully
     paid and non-assessable 

                                       5
<PAGE>
 
     and is owned by the Company, directly or through subsidiaries, free and
     clear of any security interest, mortgage, pledge, lien, encumbrance, claim
     or equity; none of the outstanding shares of capital stock of any
     Subsidiary was issued in violation of the preemptive or similar rights of
     any securityholder of such Subsidiary. The only subsidiaries of the Company
     are (A) the subsidiaries listed on Schedule A hereto and (B) certain other
     subsidiaries which, considered in the aggregate as a single Subsidiary, do
     not constitute a "significant subsidiary" as defined in Rule 1-02 of
     Regulation S-X.

          (viii)  Capitalization.  The shares of outstanding capital stock of
                  --------------                                             
     the Company have been duly authorized and validly issued and are fully paid
     and non-assessable; none of the outstanding shares of capital stock of the
     Company was issued in violation of the preemptive or other similar rights
     of any securityholder of the Company.

          (ix)  Description of Common Stock.  The IMC Common Stock conforms in
                ---------------------------                                   
     all material respects to the description thereof contained in the IMC
     Prospectus and such description conforms to the rights set forth in the
     instruments defining the same.

          (x)  Authorization of Agreement.  This Agreement has been duly
               --------------------------                               
     authorized, executed and delivered by the Company.

          (xi)  Absence of Defaults and Conflicts.  Neither the Company nor any
                ---------------------------------                              
     of its subsidiaries is in violation of its charter or bylaws or in default
     in the performance or observance of any obligation, agreement, covenant or
     condition contained in any contract, indenture, mortgage, deed of trust,
     loan or credit agreement, note, lease or other agreement or instrument to
     which the Company or any of its subsidiaries is a party or by which it or
     any of them may be bound, or to which any of the property or assets of the
     Company or any subsidiary is subject (collectively, "Agreements and
     Instruments") except for such defaults that would not result in a Material
     Adverse Effect; and the execution, delivery and performance of this
     Agreement and the consummation of the transactions contemplated herein and
     compliance by the Company with its obligations hereunder have been duly
     authorized by all necessary corporate action and do not and will not,
     whether with or without the giving of notice or passage of time or both,
     conflict with or constitute a breach of, or default or Repayment Event (as
     defined below) under, or result in the creation or imposition of any lien,
     charge or encumbrance upon any property or assets of the Company or any
     subsidiary pursuant to, the Agreements and Instruments (except for such
     conflicts, breaches or defaults or liens, charges or encumbrances that
     would not result in a Material Adverse Effect), nor will such action result
     in any violation of the provisions of the charter or bylaws of the Company
     or any subsidiary or, to the best of the Company's knowledge, any
     applicable law, statute, rule, regulation, judgment, order, writ or decree
     of any government, government instrumentality or court, domestic or
     foreign, having jurisdiction over the Company or any subsidiary or any of
     their assets, properties or operations.  As used herein, a "Repayment
     Event" means any event or condition which gives the holder of any note,
     debenture or other evidence of indebtedness of the Company or any
     subsidiary (or any person acting on such holder's behalf) the right to
     require the repurchase, redemption or repayment of all or a portion of such
     indebtedness by the Company or any subsidiary.

                                       6
<PAGE>
 
          (xii)  Absence of Labor Dispute.  No labor dispute with the employees
                 ------------------------                                      
     of the Company or any subsidiary exists or, to the knowledge of the
     Company, is imminent, and the Company is not aware of any existing or
     imminent labor disturbance by the employees of any of its or any
     subsidiary's principal suppliers, manufacturers, customers or contractors,
     which, in either case, may reasonably be expected to result in a Material
     Adverse Effect.

          (xiii)  Absence of Proceedings.  There is no action, suit, proceeding,
                  ----------------------                                        
     inquiry or investigation before or brought by any court or governmental
     agency or body, domestic or foreign, now pending, or, to the knowledge of
     the Company, threatened, against or affecting the Company or any
     subsidiary, which is required to be disclosed in the IMC Registration
     Statement (other than as disclosed therein), or which might, individually
     or in the aggregate, reasonably be expected to result in a Material Adverse
     Effect, or which might, individually or in the aggregate, reasonably be
     expected to materially and adversely affect the properties or assets
     thereof or the performance by the Company of its obligations hereunder; the
     aggregate of all pending legal or governmental proceedings to which the
     Company or any subsidiary is a party or of which any of their respective
     property or assets is the subject which are not described in the IMC
     Registration Statement, including ordinary routine litigation incidental to
     the business, could not reasonably be expected to result in a Material
     Adverse Effect.

          (xiv)  Accuracy of Exhibits.  There are no contracts or documents
                 --------------------                                      
     which are required to be described in the IMC Registration Statement, the
     IMC Prospectus or the documents incorporated by reference therein or to be
     filed as exhibits thereto which have not been so described or filed as
     required.

          (xv)  Possession of Intellectual Property.  The Company and its
                -----------------------------------                      
     subsidiaries own or possess, or can acquire on reasonable terms, adequate
     patents, patent rights, licenses, inventions, copyrights, know-how
     (including trade secrets and other unpatented and/or unpatentable
     proprietary or confidential information, systems or procedures),
     trademarks, service marks, trade names or other intellectual property
     (collectively, "Intellectual Property") necessary to carry on the business
     now operated by them, and neither the Company nor any of its subsidiaries
     has received any notice or is otherwise aware of any infringement of or
     conflict with asserted rights of others with respect to any Intellectual
     Property or of any facts or circumstances which would render any
     Intellectual Property invalid or inadequate to protect the interest of the
     Company or any of its subsidiaries therein, and which infringement or
     conflict (if the subject of any unfavorable decision, ruling or finding) or
     invalidity or inadequacy, singly or in the aggregate, would result in a
     Material Adverse Effect.

          (xvi)  Absence of Further Requirements.  No filing with, or
                 -------------------------------                     
     authorization, approval, consent, license, order, registration,
     qualification or decree of, any court or governmental authority or agency
     is necessary or required for the performance by the Company of its
     obligations hereunder, except such as has been already obtained or as may
     be required under the 1933 Act or the 1933 Act Regulations or state
     securities laws.

                                       7
<PAGE>
 
          (xvii)  Possession of Licenses and Permits.  The Company and its
                  ----------------------------------                      
     subsidiaries possess such permits, licenses, approvals, consents and other
     authorizations (collectively, "Governmental Licenses") issued by the
     appropriate federal, state, local or foreign regulatory agencies or bodies
     necessary to conduct the business now operated by them; the Company and its
     subsidiaries are in compliance with the terms and conditions of all such
     Governmental Licenses, except where the failure so to comply would not,
     singly or in the aggregate, have a Material Adverse Effect; all of the
     Governmental Licenses are valid and in full force and effect, except when
     the invalidity of such Governmental Licenses or the failure of such
     Governmental Licenses to be in full force and effect would not have a
     Material Adverse Effect; and neither the Company nor any of its
     subsidiaries has received any notice of proceedings relating to the
     revocation or modification of any such Governmental Licenses which, singly
     or in the aggregate, if the subject of an unfavorable decision, ruling or
     finding, would result in a Material Adverse Effect.

          (xviii)  Title to Property.  The Company and its subsidiaries have
                   -----------------                                        
     good and marketable title to all material real property owned by the
     Company and its subsidiaries and good title to all material personal
     property owned by them, in each case, free and clear of all mortgages,
     pledges, liens, security interests, claims, restrictions or encumbrances of
     any kind except such as (a) are described in the IMC Prospectus or (b) do
     not, singly or in the aggregate, materially affect the value of such
     property and do not materially interfere with the use made and proposed to
     be made of such property by the Company or any of its subsidiaries; and all
     of the leases and subleases material to the business of the Company and its
     subsidiaries, considered as one enterprise, and under which the Company or
     any of its subsidiaries holds properties described in the IMC Prospectus,
     are in full force and effect, and neither the Company nor any subsidiary
     has any notice of any material claim of any sort that has been asserted by
     anyone adverse to the rights of the Company or any subsidiary under any of
     the leases or subleases mentioned above, or affecting or questioning the
     rights of the Company or such subsidiary to the continued possession of the
     leased or subleased premises under any such lease or sublease.

          (xix)  Compliance with Cuba Act.  The Company has complied with, and
                 ------------------------                                     
     is and will be in compliance with, the provisions of that certain Florida
     act relating to disclosure of doing business with Cuba, codified as Section
     517.075 of the Florida statutes, and the rules and regulations thereunder
     (collectively, the "Cuba Act") or is exempt therefrom.

          (xx)  Investment Company Act.  The Company is not an "investment
                ----------------------                                    
     company" or an entity "controlled" by an "investment company" as such terms
     are defined in the Investment Company Act of 1940, as amended.

          (xxi)  Environmental Laws.  Except as described in the IMC
                 ------------------                                 
     Registration Statement and except as would not, singly or in the aggregate,
     result in a Material Adverse Effect, (A) neither the Company nor any of its
     subsidiaries is in violation of any federal, state, local or foreign
     statute, law, rule, regulation, ordinance, code, policy or rule of common
     law or any judicial or administrative interpretation thereof, including any

                                       8
<PAGE>
 
     judicial or administrative order, consent, decree or judgment, relating to
     pollution or protection of human health, the environment (including,
     without limitation, ambient air, surface water, groundwater, land surface
     or subsurface strata) or wildlife, including, without limitation, laws and
     regulations relating to the release or threatened release of
     chemicals, pollutants, contaminants, wastes, toxic substances, hazardous
     substances, petroleum or petroleum products (collectively, "Hazardous
     Materials") or to the manufacture, processing, distribution, use,
     treatment, storage, disposal, transport or handling of Hazardous Materials
     (collectively, "Environmental Laws"), (B) the Company and its subsidiaries
     have all permits, authorizations and approvals required under any
     applicable Environmental Laws and are each in compliance with their
     requirements, (C) there are no pending or threatened administrative,
     regulatory or judicial actions, suits, demands, demand letters, claims,
     liens, notices of noncompliance or violation, investigation or proceedings
     relating to any Environmental Law against the Company or any of its
     subsidiaries and (D) there are no events or circumstances that might
     reasonably be expected to form the basis of an order for clean-up or
     remediation, or an action, suit or proceeding by any private party or
     governmental body or agency, against or affecting the Company or any of its
     subsidiaries relating to Hazardous Materials or any Environmental Laws.

     (b) Officer's Certificates.  Any certificate signed by any officer of the
Company and delivered to the Underwriter or counsel for the Underwriter or to
ML&Co. or counsel for ML&Co. in connection with the offering of the Securities
shall be deemed a representation and warranty by the Company to the Underwriter
and to ML&Co., as the case may be, as to the matters covered thereby.

     SECTION 2.  Covenants of the Company.  The Company covenants with the
                 ------------------------                                 
Underwriter and with ML&Co. as follows:

     (a) Compliance with Securities Regulations and Commission Requests.  The
Company, subject to Section 2(b), will notify the Underwriter and ML&Co.
immediately, and confirm the notice in writing, (i) when any post-effective
amendment to the IMC Registration Statement shall become effective, or any
supplement to the IMC Prospectus or any amended IMC Prospectus shall have been
filed, (ii) of the receipt of any comments from the Commission, (iii) of any
request by the Commission for any amendment to the IMC Registration Statement or
any amendment or supplement to the IMC Prospectus or for additional information,
and (iv) of the issuance by the Commission of any stop order suspending the
effectiveness of the IMC Registration Statement or of any order preventing or
suspending the use of any IMC preliminary prospectus, or of the suspension of
the qualification of the shares of IMC Common Stock deliverable upon payment and
discharge of the Securities for offering or sale in any jurisdiction, or of the
initiation or threatening of any proceedings for any of such purposes.  The
Company will promptly effect the filings necessary pursuant to Rule 424(b) and
will take such steps as it deems necessary to ascertain promptly whether the
form of prospectus transmitted for filing under Rule 424(b) was received for
filing by the Commission and, in the event that it was not, it will promptly
file such prospectus.  The Company will make every reasonable effort to prevent
the issuance of any stop order and, if any stop order is issued, to obtain the
lifting thereof at the earliest possible moment.

                                       9
<PAGE>
 
     (b) Filing of Amendments. The Company will give the Underwriter and ML&Co.
notice of its intention to file or prepare any amendment to the IMC Registration
Statement (including any filing under Rule 462(b)) or any amendment, supplement
or revision to either the prospectus included in the IMC Registration Statement
at the time it became effective or to the IMC Prospectus, whether pursuant to
the 1933 Act, the 1934 Act or otherwise, will furnish the Underwriter and ML&Co.
with copies of any such documents a reasonable amount of time prior to such
proposed filing or use, as the case may be, and will not file or use any such
document to which the Underwriter or counsel for the Underwriter or ML&Co. or
counsel for ML&Co. shall reasonably object.

     (c) Delivery of IMC Registration Statements.  The Company has furnished or
will deliver to the Underwriter, counsel for the Underwriter, ML&Co. and counsel
for ML&Co., without charge, signed copies of the IMC Registration Statement as
originally filed and of each amendment thereto (including exhibits filed
therewith or incorporated by reference therein and documents incorporated or
deemed to be incorporated by reference therein) and signed copies of all
consents and certificates of experts.  If applicable, the copies of the IMC
Registration Statement and each amendment thereto furnished to the Underwriter
and ML&Co. will be identical to the electronically transmitted copies thereof
filed with the Commission pursuant to EDGAR, except to the extent permitted by
Regulation S-T.

     (d) Delivery of IMC Prospectuses.  The Company has delivered to the
Underwriter, without charge, as many copies of each IMC preliminary prospectus
as the Underwriter reasonably requested, and the Company hereby consents to the
use of such copies for purposes permitted by the 1933 Act.  The Company will
furnish to the Underwriter, without charge, during the period when the IMC
Prospectus is required to be delivered under the 1933 Act or the 1934 Act, such
number of copies of the IMC Prospectus (as amended or supplemented) as the
Underwriter may reasonably request. If applicable, the IMC Prospectus and any
amendments or supplements thereto furnished to the Underwriter and ML&Co. will
be identical to the electronically transmitted copies thereof filed with the
Commission pursuant to EDGAR, except to the extent permitted by Regulation S-T.

     (e) Continued Compliance with Securities Laws.  The Company will comply
with the 1933 Act and the 1933 Act Regulations so as to permit the completion of
the distribution of the Securities as contemplated in the Underwriting
Agreement.  If at any time when a prospectus is required by the 1933 Act to be
delivered in connection with sales of the Securities, any event shall occur or
condition shall exist as a result of which it is necessary, in the opinion of
counsel for the Underwriter, counsel for ML&Co. or counsel for the Company, to
amend the IMC Registration Statement or amend or supplement the IMC Prospectus
in order that the IMC Prospectus will not include any untrue statements of a
material fact or omit to state a material fact necessary in order to make the
statements therein not misleading in the light of the circumstances existing at
the time it is delivered to a purchaser, or if it shall be necessary, in the
opinion of any such counsel, at any such time to amend the IMC Registration
Statement or amend or supplement the IMC Prospectus in order to comply with the
requirements of the 1933 Act or the 1933 Act Regulations, the Company will
promptly prepare and file with the Commission, subject to Section 2(b), such
amendment or supplement as may be necessary to correct such statement or
omission or to make the IMC Registration Statement or the IMC 

                                       10
<PAGE>
 
Prospectus comply with such requirements, and the Company will furnish to the
Underwriter and ML&Co. such number of copies of such amendment or supplement as
the Underwriter and ML&Co. may reasonably request.

     (f) Blue Sky Qualifications.  The Company will use its best efforts, in
cooperation with the Underwriter, to qualify the shares of IMC Common Stock
deliverable upon payment and discharge of the Securities for offering and sale
under the applicable securities laws of such states and other jurisdictions of
the United States as the Underwriter may designate and to maintain such
qualifications in effect through the maturity date of the Securities; provided,
however, that the Company shall not be obligated to file any general consent to
service of process or to qualify as a foreign corporation or as a dealer in
securities in any jurisdiction in which it is not so qualified or to subject
itself to taxation in respect of doing business in any jurisdiction in which it
is not otherwise so subject.  In each jurisdiction in which the shares of IMC
Common Stock deliverable upon payment and discharge of the Securities have been
so qualified, the Company will file such statements and reports as may be
required by the laws of such jurisdiction to continue such qualification in
effect through the maturity date of the Securities.

     (g) Rule 158.  The Company will timely file such reports pursuant to the
1934 Act as are necessary in order to make generally available to its
securityholders as soon as practicable an earnings statement for the purposes
of, and to provide the benefits contemplated by, the last paragraph of Section
11(a) of the 1933 Act.

     (h) Restriction on Sale of Securities by the Company.  During a period of
90 days from the date of the IMC Prospectus, the Company will not, without the
prior written consent of the Underwriter, (x) offer, sell, contract to sell or
otherwise dispose of, directly or indirectly, any shares of IMC Common Stock,
securities convertible into, exchangeable for or repayable with shares of IMC
Common Stock, or rights or warrants to acquire shares of IMC Common Stock or (y)
file any registration statement under the 1933 Act with respect to any shares of
IMC Common Stock, securities convertible into, exchangeable for or repayable
with shares of IMC Common Stock, or rights or warrants to acquire shares of IMC
Common Stock; provided, however, that nothing contained in this subsection (h)
shall restrict or otherwise limit the Company from (i) calling for redemption in
accordance with their terms any securities convertible into IMC Common Stock,
(ii) issuing shares upon the exercise of employee or director stock options
outstanding at the date of this Agreement, (iii) issuing shares upon the
exercise of rights granted as of the date of this Agreement under the Company's
shareholders' rights plan, (iv) issuing shares in connection with acquisitions
of privately-held companies, provided that the number of shares so issued does
                             --------                                         
not exceed, in the aggregate, 2,500,000 (subject to appropriate adjustment for
stock splits, reverse stock splits and stock dividends) and that upon issuance
all such shares constitute "restricted securities" as defined in Rule 144(a)
under the 1933 Act, or (v) offering shares in connection with any registration
statement on Form S-8.

     (i) Restriction on Sale of Securities by Directors.  The Company will use
its best efforts to ensure that, during a period of 90 days from the date of the
IMC Prospectus, no director of the Company shall, without the prior written
consent of the Underwriter, offer, sell, 

                                       11
<PAGE>
 
contract to sell or otherwise dispose of, directly or indirectly, any shares of
IMC Common Stock or any securities convertible into, exchangeable for or
repayable with shares of IMC Common Stock, whether now owned or hereafter
acquired by such director or with respect to which such director has or
hereafter acquires the power of disposition, or cause to be filed any
registration statement under the 1933 Act with respect to any of the foregoing;
provided that, notwithstanding the foregoing, during such 90-day period each
director of the Company may sell, without the prior written consent of the
Underwriter, the greater of (i) 25,000 shares of IMC Common Stock and (ii) 25%
of the total number of shares of IMC Common Stock which such director either
owns or has the power of disposition as of the date of this Agreement.

     (j) Reporting Requirements.  The Company, during the period when the IMC
Prospectus is required to be delivered under the 1933 Act or the 1934 Act, will
file all documents required to be filed with the Commission pursuant to the 1934
Act within the time periods required by the 1934 Act and the rules and
regulations of the Commission thereunder.

     SECTION 3.  Payment of Expenses.  (a)  Expenses.  The Company will pay all
                 -------------------                                           
expenses incident to the performance of its obligations under this Agreement,
including (i) the preparation, printing and filing of the IMC Registration
Statement (including financial statements and exhibits) as originally filed and
of each amendment thereto, (ii) the fees and disbursements of the Company's
counsel, accountants and other advisors, (iii) the qualification of the shares
of IMC Common Stock deliverable upon payment and discharge of the Securities
under securities laws in accordance with the provisions of Section 2(f) hereof,
including filing fees and the reasonable fees and disbursements of counsel for
ML&Co. in connection therewith and in connection with the preparation of the
Blue Sky Survey and any supplement thereto, (iv) the printing and delivery to
the Underwriter of copies of each IMC Preliminary Prospectus and of the IMC
Prospectus and any amendments or supplements thereto, (v) the preparation,
printing and delivery to the Underwriter of copies of the Blue Sky Survey and
any supplement thereto and (vi) the filing fees incident to, and the reasonable
fees and disbursements of counsel to the Underwriter in connection with, the
review by the National Association of Securities Dealers, Inc. of the terms of
the offering and sale of the shares of IMC Common Stock deliverable upon payment
and discharge of the Securities.

     SECTION 4.  Indemnification.
                 --------------- 

     (a) Indemnification of Underwriter and ML&Co.  The Company agrees to
indemnify and hold harmless (1) the Underwriter and each person, if any, who
controls the Underwriter within the meaning of Section 15 of the 1933 Act or
Section 20 of the 1934 Act and (2) ML&Co. and each person, if any, who controls
ML&Co. within the meaning of Section 15 of the 1933 Act or Section 20 of the
1934 Act, as follows:

          (i) against any and all loss, liability, claim, damage and expense
     whatsoever, as incurred, arising out of any untrue statement or alleged
     untrue statement of a material fact contained in the IMC Registration
     Statement (or any amendment thereto) or the omission or alleged omission
     therefrom of a material fact required to be stated therein or necessary to
     make the statements therein not misleading or arising out of any untrue
     statement or alleged untrue statement of a material fact contained in any

                                       12
<PAGE>
 
     IMC preliminary prospectus or the IMC Prospectus (or any amendment or
     supplement thereto), or the omission or alleged omission therefrom of a
     material fact necessary in order to make the statements therein, in the
     light of the circumstances under which they were made, not misleading;

          (ii)  against any and all loss, liability, claim, damage and expense
     whatsoever, as incurred, to the extent of the aggregate amount paid in
     settlement of any litigation, or any investigation or proceeding by any
     governmental agency or body, commenced or threatened, or of any claim
     whatsoever based upon any such untrue statement or omission, or any such
     alleged untrue statement or omission, referred to under (i) above; provided
     that (subject to Section 4(d) below) any such settlement is effected with
     the written consent of the Company; and

          (iii)  against any and all expense whatsoever, as incurred (including
     the fees and disbursements of counsel chosen by the Underwriter or ML&Co.,
     as the case may be), reasonably incurred in investigating, preparing or
     defending against any litigation, or any investigation or proceeding by any
     governmental agency or body, commenced or threatened, or any claim
     whatsoever based upon any such untrue statement or omission, or any such
     alleged untrue statement or omission, referred to under (i) above, to the
     extent that any such expense is not paid under (i) or (ii) above;

provided, however, that this indemnity agreement shall not apply to any loss,
liability, claim, damage or expense to the extent arising out of any untrue
statement or omission or alleged untrue statement or omission made in reliance
upon and in conformity with written information furnished to the Company by the
Underwriter, ML&Co. or GVI expressly for use in the IMC Registration Statement
(or any amendment thereto), or any IMC preliminary prospectus or the IMC
Prospectus (or any amendment or supplement thereto).

     (b) Indemnification of Company, Directors, Officers.  The Underwriter
agrees to indemnify and hold harmless the Company, its directors, each of its
officers who signed the IMC Registration Statement, and each person, if any, who
controls the Company within the meaning of Section 15 of the 1933 Act or Section
20 of the 1934 Act against any and all loss, liability, claim, damage and
expense described in the indemnity contained in subsection (a) of this Section,
as incurred, but only with respect to untrue statements or omissions, or alleged
untrue statements or omissions, made in the IMC Registration Statement (or any
amendment thereto),  or any IMC preliminary prospectus or the IMC Prospectus (or
any amendment or supplement thereto) in reliance upon and in conformity with
written information furnished to the Company by the Underwriter expressly for
use in the IMC Registration Statement (or any amendment thereto) or such IMC
preliminary prospectus or the IMC Prospectus (or any amendment or supplement
thereto).

     (c) Actions against Parties; Notification.  Each indemnified party shall
give notice as promptly as reasonably practicable to each indemnifying party of
any action commenced against it in respect of which indemnity may be sought
hereunder, but failure to so notify an indemnifying party shall not relieve such
indemnifying party from any liability hereunder to the extent it is not
materially prejudiced as a result thereof and in any event shall not relieve it
from 

                                       13
<PAGE>
 
any liability which it may have otherwise than on account of this indemnity
agreement. In the case of parties indemnified pursuant to clause (1) of Section
4(a) above, counsel to the indemnified parties shall be selected by the
Underwriter; in the case of parties indemnified pursuant to clause (2) of
Section 4(a), counsel to the indemnified parties shall be selected by ML&Co.;
and, in the case of parties indemnified pursuant to Section 4(b) above, counsel
to the indemnified parties shall be selected by the Company. An indemnifying
party may participate at its own expense in the defense of any such action;
provided, however, that counsel to the indemnifying party shall not (except with
the consent of the indemnified party) also be counsel to the indemnified party.
In no event shall the indemnifying parties be liable for fees and expenses of
more than one counsel (in addition to any local counsel) separate from their own
counsel for all indemnified parties in connection with any one action or
separate but similar or related actions in the same jurisdiction arising out of
the same general allegations or circumstances. No indemnifying party shall,
without the prior written consent of the indemnified parties, settle or
compromise or consent to the entry of any judgment with respect to any
litigation, or any investigation or proceeding by any governmental agency or
body, commenced or threatened, or any claim whatsoever in respect of which
indemnification or contribution could be sought under this Section 4 or Section
5 hereof (whether or not the indemnified parties are actual or potential parties
thereto), unless such settlement, compromise or consent (i) includes an
unconditional release of each indemnified party from all liability arising out
of such litigation, investigation, proceeding or claim and (ii) does not include
a statement as to or an admission of fault, culpability or a failure to act by
or on behalf of any indemnified party.

     (d) Settlement without Consent if Failure to Reimburse.  If at any time an
indemnified party shall have requested an indemnifying party to reimburse the
indemnified party for fees and expenses of counsel, such indemnifying party
agrees that it shall be liable for any settlement of the nature contemplated by
Section 4(a)(ii) effected without its written consent if (i) such settlement is
entered into more than 45 days after receipt by such indemnifying party of the
aforesaid request, (ii) such indemnifying party shall have received notice of
the terms of such settlement at least 30 days prior to such settlement being
entered into and (iii) such indemnifying party shall not have reimbursed such
indemnified party in accordance with such request prior to the date of such
settlement.

     SECTION 5.  Contribution.  If the indemnification provided for in Section 4
                 ------------                                                   
hereof is for any reason unavailable to or insufficient to hold harmless an
indemnified party in respect of any losses, liabilities, claims, damages or
expenses referred to therein, then the Company on the one hand and the
Underwriter and ML&Co. on the other hand shall contribute to the aggregate
amount of such losses, liabilities, claims, damages and expenses incurred by
such indemnified party, as incurred, (i) in such proportion as is appropriate to
reflect the relative benefits received by the Company on the one hand and the
Underwriter and ML&Co. on the other hand from the offering of the Securities or
(ii) if the allocation provided by clause (i) is not permitted by applicable
law, in such proportion as is appropriate to reflect not only the relative
benefits referred to in clause (i) above but also the relative fault of the
Company on the one hand and of the Underwriter and ML&Co. on the other hand in
connection with the statements or omissions which resulted in such losses,
liabilities, claims, damages or expenses, as well as any other relevant
equitable considerations.

                                       14
<PAGE>
 
     The relative benefits received from the offering of the Securities shall be
deemed to be such that the Underwriter and ML&Co. shall be responsible for that
portion of the aggregate amount of such losses, liabilities, claims, damages and
expenses represented by the percentage that the total underwriting discount
received by the Underwriter, as set forth on the cover of the ML&Co. Prospectus,
or, if Rule 434 is used, the corresponding location on the ML&Co. Term Sheet,
bears to the aggregate initial public offering price of the Securities as set
forth on such cover and the Company shall be responsible for the balance.

     The relative fault of the Company on the one hand and the Underwriter and
ML&Co. on the other hand shall be determined by reference to, among other
things, whether any such untrue or alleged untrue statement of a material fact
or omission or alleged omission to state a material fact relates to information
supplied by the Company on the one hand or by the Underwriter or ML&Co. on the
other hand and the parties' relative intent, knowledge, access to information
and opportunity to correct or prevent such statement or omission.

     Notwithstanding the provisions of this Section 5, the Underwriter and
ML&Co. shall not be required to contribute any amount in excess of the amount by
which the total price at which the Securities underwritten by the Underwriter
and distributed to the public were offered to the public exceeds the amount of
any damages which the Underwriter and ML&Co. have otherwise been required to pay
by reason of any such untrue or alleged untrue statement or omission or alleged
omission.

     The Company, the Underwriter and ML&Co. agree that it would not be just and
equitable if contribution pursuant to this Section 5 were determined by pro rata
allocation or by any other method of allocation which does not take account of
the equitable considerations referred to above in this Section 5.  The aggregate
amount of losses, liabilities, claims, damages and expenses incurred by an
indemnified party and referred to above in this Section 5 shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in investigating, preparing or defending against any litigation, or any
investigation or proceeding by any governmental agency or body, commenced or
threatened, or any claim whatsoever based upon any such untrue or alleged untrue
statement or omission or alleged omission.

     No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the 1933 Act) shall be entitled to contribution from any person
who was not guilty of such fraudulent misrepresentation.

     For purposes of this Section 5, each person, if any, who controls an
Underwriter within the meaning of Section 15 of the 1933 Act or Section 20 of
the 1934 Act shall have the same rights to contribution as the Underwriter; each
person, if any, who controls ML&Co. within the meaning of Section 15 of the 1933
Act shall have the same rights to contribution as ML&Co.; and each director of
the Company, each officer of the Company who signed the IMC Registration
Statement, and each person, if any, who controls the Company within the meaning
of Section 15 of the 1933 Act or Section 20 of the 1934 Act shall have the same
rights to contribution as the Company.

                                       15
<PAGE>
 
     SECTION 6.  Representations, Warranties and Agreements to Survive Delivery.
                 -------------------------------------------------------------- 
All representations, warranties and agreements contained in this Agreement or in
certificates of officers of the Company submitted pursuant to the Underwriting
Agreement, shall remain operative and in full force and effect, regardless of
any investigation made by or on behalf of the Underwriter or controlling person
thereof, or by or on behalf of ML&Co. or controlling person thereof or by or on
behalf of the Company, and shall survive delivery of the Securities to the
Underwriter pursuant to the Underwriting Agreement.

     SECTION 7.  Termination.  In the event that the Underwriter terminates the
                 -----------                                                   
Underwriting Agreement as provided in Section 9 thereof, this Agreement shall
simultaneously terminate, except that the provisions of Section 3, the indemnity
agreements set forth in Section 4, the contribution provisions set forth in
Section 5, and the provisions of Section 6 shall remain in effect.

     SECTION 8.  Notices.  All notices and other communications hereunder shall
                 -------                                                       
be in writing and shall be deemed to have been duly given if mailed or
transmitted by any standard form of telecommunication.  Notices to the
Underwriter shall be directed to it at Sears Tower Building, Suite 5500,
Chicago, Illinois 60606, attention of Todd Kaplan, Director; notices to ML&Co.
shall be directed to it at 100 Church Street, 12th Floor, New York, New York
10007, attention of the Secretary, with a copy to the Treasurer at World
Financial Tower, South Tower, New York, New York 10080-6105; notices to the
Company shall be directed to it at 2100 Sanders Road, Northbrook, Illinois
60062, attention of Corporate Secretary.

     SECTION 9.  Parties.  This Agreement shall inure to the benefit of and be
                 -------                                                      
binding upon each of the Underwriter, ML&Co. and the Company and their
respective successors.  Nothing expressed or mentioned in this Agreement is
intended or shall be construed to give any person, firm or corporation, other
than the Underwriter, ML&Co. and the Company and their respective successors and
the controlling persons and officers and directors referred to in Sections 4 and
5 and their heirs and legal representatives, any legal or equitable right,
remedy or claim under or in respect of this Agreement or any provision herein
contained.  This Agreement and all conditions and provisions hereof are intended
to be for the sole and exclusive benefit of the Underwriter, ML&Co. and the
Company and their respective successors, and said controlling persons and
officers and directors and their heirs and legal representatives, and for the
benefit of no other person, firm or corporation.  No purchaser of Securities
from the Underwriter shall be deemed to be a successor by reason merely of such
purchase.

     SECTION 10. GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED BY AND
                 -------------                                          
CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

     SECTION 11. Effect of Headings.  The Article and Section headings herein
                 ------------------                                          
and the Table of Contents are for convenience only and shall not affect the
construction hereof.

                                       16
<PAGE>
 
     If the foregoing is in accordance with your understanding of our agreement,
please sign and return to the Company a counterpart hereof, whereupon this
instrument, along with all counterparts, will become a binding agreement between
the Underwriter, ML&Co. and the Company in accordance with its terms.

                                    Very truly yours,

                                    IMC GLOBAL INC.



                                    By__________________________________________
                                      Name:
                                      Title:


CONFIRMED AND ACCEPTED,
  as of the date first above written:


MERRILL LYNCH, PIERCE, FENNER & SMITH
             INCORPORATED


By _______________________________________
           Authorized Signatory



MERRILL LYNCH & CO., INC.


By _______________________________________
  Name:
  Title:

                                       17
<PAGE>
 
                                  SCHEDULE A
                                  ----------


IMC-Agrico Company (a Delaware general partnership)
IMC Global Operations Inc.
Vigoro Industries, Inc.
Kalium Chemicals, Ltd.
IMC Kalium Carlsbad Potash Company                       


<PAGE>
 
                                                                    EXHIBIT 4(b)



                           MERRILL LYNCH & CO., INC.

                                       TO

                                 CHEMICAL BANK,

                                   as Trustee



                       __________________________________

                          TENTH SUPPLEMENTAL INDENTURE

                            Dated as of July 1, 1996

                       __________________________________



                   Creating a series of Securities designated
              Structured Yield Product Exchangeable for Stock/SM/
                      6 1/4% STRYPES/SM/ Due July 1, 2001



                           Supplemental to Indenture
                           Dated as of April 1, 1983,
                                   as Amended
<PAGE>
 
                               TABLE OF CONTENTS
                               -----------------


                                  ARTICLE ONE
                                  DEFINITIONS

     SECTION 101.  Definitions..............................    2
          "Business Day"....................................    2
          "Closing Price"...................................    2
          "Company".........................................    3
          "Debt Instrument".................................    3
          "Distributed Assets"..............................    3
          "Extraordinary Cash Dividend".....................    3
          "Forward Contract"................................    3
          "IMC Global"......................................    3
          "IMC Common Stock"................................    4
          "Indenture".......................................    4
          "Initial Price"...................................    4
          "Interest Payment Date"...........................    4
          "Maturity Consideration"..........................    4
          "Maturity Date"...................................    4
          "NYSE"............................................    4
          "Principal Indenture".............................    4
          "Reference Property"..............................    4
          "Reference Property Value"........................    4
          "Reference Security"..............................    4
          "Regular Record Date".............................    5
          "Reorganization Event"............................    5
          "Securities"......................................    5
          "STRYPES".........................................    5
          "STRYPES Certificates"............................    5
          "Supplemental Indenture"..........................    5
          "Threshold Appreciation Price"....................    5
          "Trading Day".....................................    5
          "Trustee".........................................    5
          "Unit"............................................    5

                                  ARTICLE TWO
                                  THE STRYPES

     SECTION 201.  Description of the STRYPES...............    5
     SECTION 202.  Form of STRYPES..........................    6

                                 ARTICLE THREE
                        PAYMENT AND DISCHARGE OF STRYPES
 
     SECTION 301.  Payment and Discharge on the Maturity
                   Date.....................................    7
     SECTION 302.  No Fractional Units......................    7
     SECTION 303.  Adjustment of Reference Property.........    8
 

                                       i
<PAGE>
 
     SECTION 304.  Payment and Discharge With Cash.........    10
     SECTION 305.  Notice of Adjustments and Certain Other
                   Events..................................    11
     SECTION 306.  Maturity Consideration Free and Clear...    12
     SECTION 307.  Cancellation of STRYPES Certificates....    13

                                  ARTICLE FOUR
                                     TAXES

     SECTION 401.  Documentary, Stamp, Transfer or Similar 
                   Taxes...................................    13
     SECTION 402.  Treatment of STRYPES....................    13

                                  ARTICLE FIVE
                        AMENDMENT OF CERTAIN PROVISIONS
                           OF THE PRINCIPAL INDENTURE

     SECTION 501.  Amendments Relating to the STRYPES......    14
     SECTION 502.  Interpretation of Principal Indenture...    21

                                  ARTICLE SIX
                                 MISCELLANEOUS

     SECTION 601.  Effect of Supplemental Indenture........    22
     SECTION 602.  Conflict with Trust Indenture Act.......    22
     SECTION 603.  Successors and Assigns..................    22
     SECTION 604.  Separability Clause.....................    22
     SECTION 605.  Benefits of Supplemental Indenture          22
     SECTION 606.  Governing Law...........................    22
     SECTION 607.  Execution in Counterparts...............    22
     SECTION 608.  Responsibility for Recitals.............    22

                                       ii
<PAGE>
 
     Tenth Supplemental Indenture, dated as of July 1, 1996 (the "Supplemental
Indenture"), by and between Merrill Lynch & Co., Inc., a corporation organized
and existing under the laws of the State of Delaware, having its principal
office at World Financial Center, New York, New York 10281 (the "Company"), and
Chemical Bank, a corporation duly organized and existing under the laws of the
State of New York and successor by merger to Manufacturers Hanover Trust
Company, having its Corporate Trust Office at 450 West 33rd Street, New York,
New York 10001, as trustee (the "Trustee").

     WHEREAS, the Company has heretofore executed and delivered its Indenture,
dated as of April 1, 1983 and restated as of April 1, 1987 (as amended and
supplemented to the date hereof, the "Principal Indenture"), to the Trustee to
provide for the issuance from time to time of its unsecured and unsubordinated
debentures, notes or other evidences of senior indebtedness (the "Securities"),
unlimited as to principal amount; and

     WHEREAS, the Principal Indenture, as amended by the Trust Indenture Reform
Act of 1990, and this Supplemental Indenture are hereinafter collectively
referred to as the "Indenture"; and

     WHEREAS, the Company proposes to create and issue a new series of
Securities designated as its Structured Yield Product Exchangeable for
Stock/SM/, 6 1/4% STRYPES/SM/ Due July 1, 2001 (each such Security being
referred to herein as a "STRYPES"), the terms of which will require the Company
to pay and discharge the STRYPES on their maturity date by delivering to the
Holders thereof a specified percentage of each type of security and other
property then constituting part of the Reference Property (as defined herein)
or, at the option of the Company, cash with an equal value, as provided herein;

     WHEREAS, the Reference Property initially will consist of one share of
common stock, par value $1.00 per share ("IMC Common Stock"), of IMC Global
Inc., a Delaware corporation ("IMC Global"), including the preferred stock
purchase right associated therewith, and will be adjusted from time to time
prior to the maturity date of the STRYPES to reflect the addition or
substitution of any cash, Reference Securities and/or other property receivable
in respect of such share of IMC Common Stock (or any other security or property
constituting part of the Reference Property) as a result of any dividend or
distribution (other than cash dividends that do not constitute Extraordinary
Cash Dividends and payments of interest on any evidences of indebtedness) or
issuance of rights or warrants with respect thereto (or any other security or
property constituting part of the Reference Property) or any Reorganization
Event involving IMC

_______________________

/SM/ Service mark of Merrill Lynch & Co., Inc.
<PAGE>
 
Global (or any issuer of any other security constituting part of the Reference
Property); and

     WHEREAS, Section 901 of the Principal Indenture provides that, without the
consent of any Holders, the Company, when authorized by a Board Resolution, and
the Trustee, at any time and from time to time, may enter into one or more
indentures supplemental to the Principal Indenture, in form satisfactory to the
Trustee, (a) to establish the form or terms of Securities of any series as
permitted by Sections 201 and 301 thereof and (b) to cure any ambiguity, to
correct or supplement any provision in the Principal Indenture which may be
defective or inconsistent with any other provision of the Principal Indenture,
or to make any other provisions with respect to matters or questions arising
under the Principal Indenture which shall not adversely affect the interests of
the Holders of Securities of any series or any related coupons in any material
respect; and

     WHEREAS, the Company has duly authorized the execution and delivery of this
Supplemental Indenture, and all things necessary to make this Supplemental
Indenture a valid agreement of the Company, in accordance with its terms, have
been done;

     NOW, THEREFORE, the Company and the Trustee, in consideration of the
premises and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, hereby covenant and agree, for the
equal and proportionate benefit of all Holders, as follows:

                                  ARTICLE ONE

                                  DEFINITIONS

     SECTION 101.   Definitions.  For all purposes of the Principal Indenture
                    -----------                                              
and this Supplemental Indenture relating to the series of Securities (consisting
of STRYPES) created hereby, except as otherwise expressly provided or unless the
context otherwise requires, the terms defined in this Article have the meanings
assigned to them in this Article.  Capitalized terms used in the Principal
Indenture and this Supplemental Indenture but not defined herein are used as
they are defined in the Principal Indenture.

          "Business Day" means any day that is not a Saturday, a Sunday or a day
     on which the New York Stock Exchange, banking institutions or trust
     companies in The City of New York are authorized or obligated by law or
     executive order to close.

          "Closing Price" means, with respect to any Reference Security on any
     date of determination, the closing sale price (or, if no closing price is
     reported, the last reported sale price) of such Reference Security on the
     NYSE

                                       2
<PAGE>
 
     on such date or, if such Reference Security is not listed for trading on
     the NYSE on any such date, as reported in the composite transactions for
     the principal United States securities exchange on which such Reference
     Security is so listed, or if such Reference Security is not so listed on a
     United States national or regional securities exchange, as reported by the
     National Association of Securities Dealers, Inc. Automated Quotation
     System, or, if such Reference Security is not so reported, the last quoted
     bid price for such Reference Security in the over-the-counter market as
     reported by the National Quotation Bureau or similar organization, or, if
     such bid price is not available, the market value of such Reference
     Security on such date as determined by a nationally recognized independent
     investment banking firm retained for this purpose by the Company.

          "Company" means the Person named as the "Company" in the first
     paragraph of this instrument until a successor corporation shall have
     become such pursuant to the applicable provisions of the Principal
     Indenture, and thereafter "Company" shall mean such successor corporation.

          "Debt Instrument" has the meaning specified in Section 402.

          "Distributed Assets" has the meaning specified in Section 303(c).

          "Extraordinary Cash Dividend" means, with respect to any consecutive
     12-month period, the amount, if any, by which the aggregate amount of all
     cash dividends on any Reference Security consisting of capital stock
     occurring in such 12-month period (or, if such Reference Security was not
     outstanding at the commencement of such 12-month period, occurring in such
     shorter period during which such Reference Security was outstanding)
     exceeds on a per share basis 12% of the average of the Closing Prices per
     share of such Reference Security over such 12-month period (or such shorter
     period during which such Reference Security was outstanding); provided
                                                                   --------
     that, for purposes of the foregoing definition, the amount of cash
     dividends paid on a per share basis shall be appropriately adjusted to
     reflect the occurrence during such period of any stock dividend or
     distribution of shares of capital stock of the issuer of such Reference
     Security or any subdivision, split, combination or reclassification of
     shares of such Reference Security.

          "Forward Contract" has the meaning specified in Section 402.

          "IMC Global" has the meaning specified in the fourth recital of the
     Company in this instrument.

                                       3
<PAGE>
 
          "IMC Common Stock" has the meaning specified in the fourth recital of
     the Company in this instrument.

          "Indenture" has the meaning specified in the second recital of the
     Company in this instrument.

          "Initial Price" has the meaning specified in Section 301.

          "Interest Payment Date" has the meaning specified in Section 201.

          "Maturity Consideration" means the number or amount of each type of
     Reference Security and other property constituting part of the Reference
     Property (or, pursuant to the Company's option, the amount of cash in lieu
     thereof) deliverable upon payment and discharge of the STRYPES on the
     Maturity Date as provided in Article Three.

          "Maturity Date" has the meaning specified in Section 201.

          "NYSE" means the New York Stock Exchange, Inc.

          "Principal Indenture" has the meaning specified in the first recital
     of the Company in this instrument.

          "Reference Property" has the meaning specified in Section 301.

          "Reference Property Value" means, subject to the provisions of Section
     303(b), the sum of (a) for any portion of the Reference Property consisting
     of cash, the amount of such cash, (b) for any portion of the Reference
     Property consisting of property other than cash or Reference Securities,
     the fair market value of such property (as determined by a nationally
     recognized independent investment banking firm retained for this purpose by
     the Company) as of the third Trading Day preceding the Maturity Date, and
     (c) for any portion of the Reference Property consisting of a Reference
     Security (including IMC Common Stock), an amount equal to the average
     Closing Price per unit of such Reference Security on the 20 Trading Days
     immediately prior to, but not including, the second Trading Day preceding
     the Maturity Date multiplied by the number of units of such Reference
     Security constituting part of the Reference Property.

          "Reference Security" means, at any time, any security (as defined in
     Section 2(1) of the Securities Act of 1933, as amended) then constituting
     part of the Reference Property.

                                       4
<PAGE>
 
          "Regular Record Date" has the meaning specified in Section 201.

          "Reorganization Event" has the meaning specified in Section 303(d).

          "Securities" has the meaning specified in the first recital of the
     Company in this instrument.

          "STRYPES" has the meaning specified in the third recital of the
     Company in this instrument.

          "STRYPES Certificates" has the meaning specified in Section 202.

          "Supplemental Indenture" has the meaning specified in the first
     paragraph of this instrument.

          "Threshold Appreciation Price" has the meaning specified in Section
     301.

          "Trading Day" means, with respect to any Reference Security the
     Closing Price of which is being determined, a day on which such Reference
     Security (A) is not suspended from trading on any national or regional
     securities exchange or association or over-the-counter market at the close
     of business and (B) has traded at least once on the national or regional
     securities exchange or association or over-the-counter market that is the
     primary market for the trading of such Reference Security.

          "Trustee" means the Person named as the "Trustee" in the first
     paragraph of this instrument until a successor Trustee with respect to the
     STRYPES shall have become such pursuant to the applicable provisions of the
     Principal Indenture, and thereafter "Trustee" shall mean such successor
     Trustee.

          "Unit" has the meaning specified in Section 402.


                                  ARTICLE TWO

                                  THE STRYPES

     SECTION 201.   Description of the STRYPES.  The Securities shall be known
                    --------------------------                                
and designated as the "Structured Yield Product Exchangeable for Stock, 6 1/4%
STRYPES Due July 1, 2001" of the Company.  The aggregate number of STRYPES which
may be authenticated and delivered under this Supplemental Indenture is limited
to 6,510,286 with an issue price of $38.25 per STRYPES, or $249,018,440 in the
aggregate, except for STRYPES evidenced by STRYPES Certificates authenticated
and delivered upon

                                       5
<PAGE>
 
registration of transfer of, or in exchange for, or in lieu of, other STRYPES
Certificates evidencing such STRYPES pursuant to Section 304, 305, 306 or 906 of
the Principal Indenture.

     The STRYPES shall mature on July 1, 2001 (the "Maturity Date").  On the
Maturity Date, the STRYPES shall be paid and discharged as provided in Article
Three of this Supplemental Indenture.

     The STRYPES shall bear interest at the rate of $2.3908 per STRYPES per
annum (or $.5977 per STRYPES per quarter), from July 9, 1996, or from the most
recent Interest Payment Date to which interest has been paid or duly provided
for, as the case may be, until the Maturity Date or such earlier date on which
the issue price of all STRYPES is repaid in accordance with the provisions of
the Indenture.  Interest shall be payable in cash quarterly in arrears on
January 1, April 1, July 1 and October 1, beginning October 1, 1996, and on the
Maturity Date (each, an "Interest Payment Date"), to the Persons in whose names
the STRYPES are registered at the close of business on the fifteenth calendar
day (whether or not a Business Day) immediately preceding such Interest Payment
Date (each, a "Regular Record Date").  Interest on the STRYPES shall be computed
on the basis of a 360-day year of twelve 30-day months.

     The interest on the STRYPES shall be payable and the Maturity Consideration
shall be deliverable or payable at the office or agency of the Company in the
Borough of Manhattan, The City of New York maintained for such purpose and at
any other office or agency maintained by the Company for such purpose; provided,
however, that at the option of the Company payment of interest may be made by
check mailed to the address of the Person entitled thereto as such address shall
appear in the Security Register.

     The STRYPES shall not be redeemable at the option of the Company, or
payable at the option of the Holders, prior to the Maturity Date.

     The STRYPES shall be issuable only in registered form without coupons.  The
STRYPES will be issued in any whole numbers.  No fractional STRYPES or scrip
representing fractional STRYPES shall be issued.

     SECTION 202.   Form of STRYPES.  The STRYPES shall be evidenced by
                    ---------------                                    
certificates ("STRYPES Certificates") in the form attached hereto as Exhibit A.

                                       6
<PAGE>
 
                                 ARTICLE THREE

                        PAYMENT AND DISCHARGE OF STRYPES

     SECTION 301.  Payment and Discharge on the Maturity Date.   On the Maturity
                   ------------------------------------------                   
Date, the Company shall pay and discharge each STRYPES by delivering to the
Holder thereof:  (a) if the Reference Property Value is greater than or equal to
$46.28 (the "Threshold Appreciation Price"), 82.65% of the amount or number of
each type of Reference Security and other property constituting part of the
Reference Property, (b) if the Reference Property Value is less than the
Threshold Appreciation Price but is greater than $38.25 (the "Initial Price"), a
percentage of the amount or number of each type of Reference Security and other
property constituting part of the Reference Property, allocated as
proportionately as practicable, so that the aggregate value thereof is equal to
the Initial Price and (c) if the Reference Property Value is less than or equal
to the Initial Price, 100% of the amount or number of each type of Reference
Security and other property constituting part of the Reference Property.

     The term "Reference Property" shall initially mean one share of IMC Common
Stock, including the preferred stock purchase right associated therewith, and
shall be subject to adjustment from time to time prior to the Maturity Date to
reflect the addition or substitution of any cash, securities and/or other
property resulting from the application of the provisions of Section 303 of this
Article Three.

     Holders of the STRYPES will be responsible for the payment of any and all
brokerage and transaction costs upon any subsequent sale of any Reference
Security or other property constituting part of the Reference Property received
on the Maturity Date as described above.

     SECTION 302.  No Fractional Units.  No fractional units or scrip
                   -------------------                               
representing fractional units of any Reference Security shall be delivered on
the Maturity Date.  If more than one STRYPES shall be held at one time by the
same Holder, the number of full units of any Reference Security which shall be
delivered upon payment and discharge of such Holder's STRYPES shall be computed
on the basis of the aggregate number of STRYPES so held on the Maturity Date.
In lieu of any fractional unit of any Reference Security which would otherwise
be deliverable upon payment and discharge of any STRYPES on the Maturity Date,
the Company, through any applicable Paying Agent, shall make a cash payment in
respect of such fractional unit in an amount equal to the value of such
fractional unit based on the average Closing Price per unit of such Reference
Security on the 20 Trading Days immediately prior to, but not including, the
second Trading Day preceding the Maturity Date.

                                       7
<PAGE>
 
     To the extent practicable, the Company will deliver fractional interests of
any Reference Property other than cash or a Reference Security upon payment and
discharge of any STRYPES on the Maturity Date.  If such delivery is not
practicable, in lieu of any fractional interest of any Reference Property other
than cash or a Reference Security which would otherwise be deliverable on the
Maturity Date, the Company, through any Paying Agent, shall make a cash payment
in respect of such fractional interest in an amount equal to the value of such
fractional interest based on the fair market value (as determined by a
nationally recognized independent investment banking firm retained for this
purpose by the Company) as of the third Trading Day preceding the Maturity Date
of such Reference Property other than cash or a Reference Security.

     SECTION 303.  Adjustment of Reference Property.
                   -------------------------------- 

     (a)  Adjustment for Subdivisions, Splits, Combinations or
          ----------------------------------------------------
Reclassifications.  If an issuer of a Reference Security shall:
- -----------------

               (A)  subdivide or split the outstanding units of such Reference
     Security into a greater number of units;

               (B)  combine the outstanding units of such Reference Security
     into a smaller number of units; or

               (C)  issue by reclassification of units of such Reference
     Security any units of another security of such issuer;

then, in any such event, the Reference Property shall be adjusted to include the
number of units of such Reference Security and/or other security of such issuer
which a holder of units of such Reference Security would have owned or been
entitled to receive immediately following any event described above had such
holder held, immediately prior to such event, the number of units of such
Reference Security constituting part of the Reference Property immediately prior
to such event.  Each such adjustment shall become effective immediately after
the effective date for such subdivision, split, combination or reclassification,
as the case may be.  Each such adjustment shall be made successively.

     (b)  Adjustment for Issuance of Certain Rights or Warrants.  If an issuer
          -----------------------------------------------------               
of a Reference Security shall issue rights or warrants to all holders of such
Reference Security entitling them, for a period expiring prior to the fifteenth
calendar day following the Maturity Date, to subscribe for or purchase any of
its securities or other property (other than rights to purchase units of such
Reference Security pursuant to a plan for the reinvestment of dividends or
interest), then in each such case, the Reference Property shall be adjusted to
include an amount in cash equal to the fair market value (determined as
described below), as of the fifth Business Day following the date on which

                                       8
<PAGE>
 
such rights or warrants are received by securityholders entitled thereto (the
"Receipt Date"), of each such right or warrant multiplied by the product of (A)
the number of such rights or warrants issued for each unit of such Reference
Security and (B) the number of units of such Reference Security constituting
part of the Reference Property on the date of issuance of such rights or
warrants, immediately prior to such issuance, without interest thereon.  For
purposes of this subsection (b), the fair market value of each such right or
warrant shall be determined by the Company and shall be the quotient of (x) the
highest net bid, as of approximately 10:00 A.M., New York City time, on the
fifth Business Day following the Receipt Date for settlement three Business Days
later, by a recognized securities dealer in The City of New York selected by or
on behalf of the Company (from three (or such fewer number of dealers as may be
providing such bids) such recognized dealers selected by or on behalf of the
Company), for the purchase by such quoting dealer of the number of rights or
warrants (the "Aggregate Number") that a holder of such Reference Security would
receive if such holder held, as of the record date for determination of
stockholders entitled to receive such rights or warrants, a number of units of
such Reference Security equal to the product of (1) the aggregate number of
Outstanding STRYPES as of such record date and (2) the number of units of such
Reference Security constituting part of the Reference Property, divided by (y)
the Aggregate Number.  Each such adjustment shall become effective on the fifth
Business Day following the Receipt Date of such rights or warrants.  If for any
reason the Company is unable to obtain the required bid on the fifth Business
Day following the Receipt Date, it shall attempt to obtain such bid at
successive intervals of three months thereafter and on the third Trading Day
prior to the Maturity Date until it is able to obtain the required bid.  From
the date of issuance of such rights or warrants until the required bid is
obtained, the Reference Property shall include the number of such rights or
warrants issued for each unit of such Reference Security multiplied by the
number of units of such Reference Security constituting part of the Reference
Property on the date of issuance of such rights or warrants, immediately prior
to such issuance, and such rights or warrants constituting part of the Reference
Property shall be deemed for purposes of the definition of Reference Property
Value and Section 304 of this Article Three to have a fair market value of zero.

     (c)  Adjustment for Distributions.   If an issuer of a Reference Security
          ----------------------------                                        
shall pay a dividend or make a distribution to all holders of such Reference
Security of cash, securities or other property (excluding any cash dividend on
any Reference Security consisting of capital stock that does not constitute an
Extraordinary Cash Dividend, excluding any payment of interest on any Reference
Security consisting of an evidence of indebtedness and excluding any dividend or
distribution described in subsection (a) or (b) above) or shall issue to all
holders of such Reference Security rights or warrants to subscribe for or

                                       9
<PAGE>
 
purchase any of its securities or other property (excluding any rights or
warrants referred to in subsection (b) above) (any of the foregoing being
referred to herein as "Distributed Assets"), then in each such case, the
Reference Property shall be adjusted to include, from and after such dividend,
distribution or issuance, (x) in respect of that portion, if any, of the
Distributed Assets consisting of cash, the amount of such Distributed Assets
consisting of cash received for each unit of such Reference Security multiplied
by the number of units of such Reference Security constituting part of the
Reference Property on the date of such dividend, distribution or issuance,
immediately prior to such dividend, distribution or issuance, without interest
thereon, plus (y) in respect of that portion, if any, of the Distributed Assets
which are other than cash, the number or amount of each type of Distributed
Assets other than cash received with respect to each unit of such Reference
Security multiplied by the number of units of such Reference Security
constituting part of the Reference Property on the date of such dividend,
distribution or issuance, immediately prior to such dividend, distribution or
issuance.

     (d)   Adjustment for Consolidation, Merger or Other Reorganization Event.
           ------------------------------------------------------------------  
In the event of (i) any consolidation or merger of an issuer of a Reference
Security with or into another entity (other than a merger or consolidation in
which such issuer is the continuing corporation and in which the Reference
Security outstanding immediately prior to the merger or consolidation is not
exchanged for cash, securities or other property of such issuer or another
entity), (ii) any statutory exchange of securities of an issuer of a Reference
Security with another entity (other than in connection with a merger or
acquisition) or (iii) any liquidation, dissolution, winding up or bankruptcy of
an issuer of a Reference Security (excluding any distribution in such event
referred to in subsection (c) above) (any such event described in clause (i),
(ii) or (iii), a "Reorganization Event"), the Reference Property shall be
adjusted to include, from and after the effective date for such Reorganization
Event, in lieu of the number of units of such Reference Security constituting
part of the Reference Property immediately prior to the effective date for such
Reorganization Event, the amount or number of any cash, securities and/or other
property owned or received in such Reorganization Event with respect to each
unit of such Reference Security multiplied by the number of units of such
Reference Security constituting part of the Reference Property immediately prior
to the effective date for such Reorganization Event.

     SECTION 304.  Payment and Discharge with Cash.   Notwithstanding the
                   -------------------------------                       
provisions of Sections 301, 302 and 303 of this Article Three, the Company may,
at its option, in lieu of delivering the applicable percentage of each type of
Reference Security and other property constituting part of the Reference
Property on the Maturity Date, deliver cash in an amount

                                       10
<PAGE>
 
(calculated to the nearest 1/100th of a dollar per STRYPES or, if there is not a
nearest 1/100th of a dollar, then to the next higher 1/100th of a dollar) equal
to the sum of (a) for any portion of the Reference Property consisting of cash
that is otherwise deliverable on the Maturity Date, the amount of such cash,
without interest thereon, (b) for any portion of the Reference Property
consisting of property other than cash or Reference Securities that is otherwise
deliverable on the Maturity Date, the fair market value of such property (as
determined by a nationally recognized independent investment banking firm
retained for this purpose by the Company) as of the third Trading Day preceding
the Maturity Date, and (c) for any portion of the Reference Property consisting
of a Reference Security (including IMC Common Stock) that is otherwise
deliverable on the Maturity Date (except as provided in Section 303(b)), an
amount equal to the average Closing Price per unit of such Reference Security on
the 20 Trading Days immediately prior to, but not including, the second Trading
Day preceding the Maturity Date multiplied by the number of units of such
Reference Security constituting part of the Reference Property.  Such option, if
exercised by the Company, must be exercised with respect to all Reference
Securities and other property otherwise deliverable on the Maturity Date upon
payment and discharge of all Outstanding STRYPES.

     SECTION 305.  Notice of Adjustments and Certain Other Events.
                   ---------------------------------------------- 

     (a)  In case at any time while any of the STRYPES are outstanding the
Company receives notice that:

          (i)  an issuer of a Reference Security shall declare a dividend (or
any other distribution) on or in respect of such Reference Security to which
Section 303(c) shall apply (other than any cash dividends, if any, paid from
time to time by such issuer that do not constitute Extraordinary Cash
Dividends);

          (ii)  an issuer of a Reference Security shall authorize the issuance
to all holders of such Reference Security of rights or warrants to subscribe for
or purchase units of such Reference Security or of any other subscription rights
or warrants;

          (iii)  there shall occur any conversion or reclassification of any
Reference Security (other than a subdivision or combination of outstanding units
of such Reference Security) or any consolidation, merger or reorganization to
which an issuer of a Reference Security is a party and for which approval of any
unitholders of such issuer is required, or the sale or transfer of all or
substantially all of the assets of an issuer of a Reference Security; or

                                       11
<PAGE>
 
          (iv)  there shall occur the voluntary or involuntary dissolution,
liquidation, winding up or bankruptcy of an issuer of a Reference Security;

then the Company shall promptly cause to be delivered to the Trustee and any
applicable Paying Agent and filed at the office or agency maintained for the
purpose of payment and discharge of STRYPES on the Maturity Date in the Borough
of Manhattan, The City of New York by the Trustee (or any applicable Paying
Agent), and shall promptly cause to be mailed to the Holders of STRYPES at their
last addresses as they shall appear in the Security Register, at least 10 days
before the date hereinafter specified (or the earlier of the dates hereinafter
specified, in the event that more than one is specified), a notice stating (x)
the date, if known by the Company, on which a record is to be taken for the
purpose of such dividend, distribution or grant of rights or warrants, or, if a
record is not to be taken, the date as of which the holders of such Reference
Security of record to be entitled to such dividend, distribution or grant of
rights or warrants are to be determined, or (y) the date, if known by the
Company, on which such reclassification, consolidation, merger, sale, transfer,
dissolution, liquidation, winding up or bankruptcy is expected to become
effective.

     (b)  Within 10 Business Days following the occurrence of an event that
requires an adjustment to the Reference Property pursuant to Section 303 of this
Article Three (or if the Company is not aware of such occurrence, as soon as
practicable after becoming so aware), the Company shall provide written notice
to the Trustee and to the Holders of the STRYPES of the occurrence of such event
and a statement setting forth in reasonable detail the amount or number of each
type of Reference Security and other property then constituting part of the
Reference Property.

     (c)  On or prior to the sixth Business Day preceding the Maturity Date, the
Company will notify The Depository Trust Company and the Trustee and will
publish a notice in The Wall Street Journal or another daily newspaper of
national circulation stating whether the STRYPES will be paid and discharged on
the Maturity Date by delivery of the applicable percentage of each type of
Reference Security and other property constituting part of the Reference
Property or of cash in accordance with this Article Three.

     SECTION 306.  Maturity Consideration Free and Clear.  The Company hereby
                   -------------------------------------                     
warrants that upon payment and discharge of a STRYPES on the Maturity Date
pursuant to this Supplemental Indenture, the Holder of a STRYPES shall receive
all rights held by the Company in the Maturity Consideration with which such
STRYPES is at such time payable and dischargeable pursuant to this Supplemental
Indenture, free and clear of any and all liens, claims, charges and
encumbrances, other than any liens, claims, charges and encumbrances which may
have been placed on any

                                       12
<PAGE>
 
Maturity Consideration by the prior owner thereof prior to the time such
Maturity Consideration was acquired by the Company.  Except as provided in
Section 401 of Article Four, the Company will pay all taxes and charges with
respect to the delivery of Maturity Consideration delivered upon payment and
discharge of STRYPES hereunder.

     SECTION 307.  Cancellation of STRYPES Certificates.  Upon receipt by the
                   ------------------------------------                      
Trustee of a STRYPES Certificate delivered to it for payment and discharge of
the STRYPES evidenced thereby under this Article Three, the Trustee shall cancel
and dispose of the same as provided in Section 309 of the Principal Indenture.


                                  ARTICLE FOUR

                                     TAXES

     SECTION 401.   Documentary, Stamp, Transfer or Similar Taxes.  The Company
                    ---------------------------------------------              
will pay any and all documentary, stamp, transfer or similar taxes that may be
payable in respect of the transfer and delivery of the Maturity Consideration
pursuant to this Supplemental Indenture; provided, however, that the Company
shall not be required to pay any such tax which may be payable in respect of any
transfer involved in the delivery of Maturity Consideration in a name other than
that in which the STRYPES so paid and discharged were registered, and no such
transfer or delivery shall be made unless and until the Person requesting such
transfer has paid to the Company the amount of any such tax, or has established,
to the satisfaction of the Company, that such tax has been paid.

     SECTION 402.   Treatment of STRYPES.  The parties hereto hereby agree, and
                    --------------------                                       
each Holder of a STRYPES by its purchase of a STRYPES hereby agrees:

       (a) to treat, for all United States Federal, state and local tax
           purposes, each STRYPES as a unit (a "Unit") consisting of (A) a debt
           instrument (the "Debt Instrument") with a fixed principal amount
           unconditionally payable on the Maturity Date equal to the issue price
           of the STRYPES and bearing interest at the stated interest rate on
           the STRYPES and (B) a forward purchase contract (the "Forward
           Contract") pursuant to which the Holder is irrevocably committed to
           use the principal payment due on the Debt Instrument to purchase on
           the Maturity Date the Reference Property which the Company is
           obligated to deliver at that time (subject to the Company's right to
           deliver cash with an equal value), which treatment will require,
           among other things, each Holder that is subject to United States
           Federal income tax in connection with its ownership of the STRYPES to
           include

                                       13
<PAGE>
 
           currently in income payments denominated as interest that are made
           with respect to the STRYPES in accordance with such Holder's regular
           method of tax accounting and to treat the Debt Instrument as having
           been issued with original issue discount in an amount equal to 3.15%
           of the issue price of the STRYPES;

       (b) in the case of purchases of STRYPES in connection with the original
           issuance thereof, (A) to allocate $37.045 of the entire initial
           purchase price of a STRYPES (i.e., the issue price of a STRYPES) to
           the Debt Instrument component and to allocate the remaining $1.205 of
           the entire initial purchase price of a STRYPES to the Forward
           Contract component and (B) to treat such acquisition of the STRYPES
           by the Holder as a purchase of the Debt Instrument by the Holder for
           $37.045 and the making of an initial payment by the Holder with
           respect to the Forward Contract of $1.205;

       (c) in the case of purchases and sales of STRYPES subsequent to the
           original issuance thereof, the purchase price paid (or received) by a
           Holder will be allocated by the Holder between the Debt Instrument
           and the Forward Contract based upon their relative fair market values
           (as determined on the date of acquisition or disposition);

       (d) to file all United States Federal, state and local income, franchise
           and estate tax returns consistent with the treatment of each STRYPES
           as a Unit consisting of the Debt Instrument and the Forward Contract
           (in the absence of any change or clarification in applicable law, by
           regulation or otherwise, requiring a different characterization or
           treatment of the STRYPES).


                                  ARTICLE FIVE

                        AMENDMENT OF CERTAIN PROVISIONS
                           OF THE PRINCIPAL INDENTURE

     SECTION 501.       Amendments Relating to the STRYPES.  The Principal
                        ----------------------------------                
Indenture is hereby amended, solely with respect to the STRYPES, as follows:

     (a)   By deleting Section 308 of the Principal Indenture in its entirety
and inserting in its stead the following:

     "SECTION 308. Persons Deemed Owners.  Prior to due presentment of a STRYPES
     Certificate for registration of transfer of STRYPES evidenced thereby, the
     Company, the Trustee and any agent of the Company or the Trustee may treat
     the Person in whose name such STRYPES Certificate is

                                       14
<PAGE>
 
     registered as the owner of the STRYPES evidenced thereby for the purpose of
     receiving delivery or payment of the Maturity Consideration in respect of,
     and (subject to Sections 305 and 307) interest on, such STRYPES and for all
     other purposes whatsoever, whether or not such STRYPES be overdue, and
     neither the Company, the Trustee nor any agent of the Company or the
     Trustee shall be affected by notice to the contrary."

     (b) By deleting Section 501 of the Principal Indenture in its entirety and
inserting in its stead the following:

     "SECTION 501.  Events of Default.  "Event of Default", wherever used herein
     with respect to STRYPES, means any one of the following events (whatever
     the reason for such Event of Default and whether it shall be voluntary or
     involuntary or be effected by operation of law pursuant to any judgment,
     decree or order of any court or any order, rule or regulation of any
     administrative or governmental body):

          (1) failure to deliver or pay the Maturity Consideration on the
     Maturity Date; or

          (2) failure to pay any interest on any STRYPES when due, and
     continuance of such failure for a period of 30 days; or

          (3) failure to perform any other covenant of the Company in this
     Indenture (other than a covenant a failure in whose performance is
     elsewhere in this Section specifically dealt with), and the continuance of
     such failure for a period of 60 days after there has been given, by
     registered or certified mail, to the Company by the Trustee, or to the
     Company and the Trustee by the Holders of at least 10% of the aggregate
     issue price of the Outstanding STRYPES a written notice specifying such
     failure and requiring it to be remedied and stating that such notice is a
     "Notice of Default" hereunder; or

          (4) a court having jurisdiction in the premises shall enter a decree
     or order for relief in respect of the Company in an involuntary case under
     any applicable bankruptcy, insolvency or other similar law now or hereafter
     in effect, or appointing a receiver, liquidator, assignee, custodian,
     trustee, sequestrator (or similar official) of the Company or for any
     substantial part of its property, or ordering the winding-up or liquidation
     of its affairs, and such decree or order shall remain unstayed and in
     effect for a period of 60 consecutive days; or

          (5) the Company shall commence a voluntary case under any applicable
     bankruptcy, insolvency or other similar law now or hereafter in effect, or
     shall consent to the entry of

                                       15
<PAGE>
 
     an order for relief in an involuntary case under any such law, or shall
     consent to the appointment of or taking possession by a receiver,
     liquidator, assignee, trustee, custodian, sequestrator (or similar
     official) of the Company or for any substantial part of its property, or
     shall fail generally to pay its debts as they become due or shall take any
     corporate action in furtherance of any of the foregoing."

     (c)   By deleting Section 502 of the Principal Indenture in its entirety
and inserting in its stead the following:

     "SECTION 502.  Acceleration of Maturity; Rescission and Annulment.  If an
     Event of Default (other than an Event of Default specified in Section
     501(4) or 501(5)) occurs and is continuing, then and in every such case the
     Trustee or the Holders of not less than 25% of the aggregate issue price of
     the Outstanding STRYPES may declare an amount equal to the issue price of
     all the STRYPES to be due and payable immediately, by a notice in writing
     to the Company (and to the Trustee if given by the Holders), and upon any
     such declaration such amount shall become immediately due and payable in
     cash.  If an Event of Default specified in Section 501(4) or 501(5) occurs,
     an amount equal to the issue price of all the STRYPES shall automatically,
     and without any declaration or other action on the part of the Trustee or
     any Holder, become immediately due and payable in cash.

     At any time after such a declaration of acceleration has been made or an
     Event of Default specified in Section 501(4) or 501(5) has occurred, and
     before a judgment or decree for payment of the money due has been obtained
     by the Trustee as hereinafter provided, the Holders of a majority of the
     aggregate issue price of the Outstanding STRYPES, by written notice to the
     Company and the Trustee, may rescind and annul such declaration or Event of
     Default and its consequences if

          (1) the Company has paid or deposited with the Trustee a sum
          sufficient to pay

               (A) all overdue installments of interest on all STRYPES,

               (B) to the extent that payment of such interest is lawful,
               interest upon overdue installments of interest at the rate borne
               by the STRYPES, and

               (C) all sums paid or advanced by the Trustee hereunder and the
               reasonable compensation, expenses, disbursements and advances of
               the Trustee, its agents and counsel,

                                       16
<PAGE>
 
          and

          (2) all Events of Default with respect to the STRYPES, other than the
          non-payment of the amount equal to the issue price of all the STRYPES
          due solely by reason of such declaration of acceleration or Event of
          Default specified in Section 501(4) or 501(5), have been cured or
          waived as provided in Section 513.

     No such rescission shall affect any subsequent default or impair any right
     consequent thereon."

     (d)   By deleting the first paragraph of Section 503 of the Principal
Indenture in its entirety and inserting in its stead the following:

          "The Company covenants that, if default is made in the payment of any
     installment of interest on any STRYPES (other than interest due on the
     Maturity Date) when such interest becomes due and payable and such default
     continues for a period of 30 days, the Company will, upon demand of the
     Trustee, pay to it, for the benefit of the Holders of such STRYPES, an
     amount equal to the issue price of all the STRYPES, the whole amount of
     interest then due and payable on such STRYPES and, to the extent that
     payment of such interest shall be legally enforceable, interest on any
     overdue interest, at the rate borne by the STRYPES, and, in addition
     thereto, such further amount as shall be sufficient to cover the costs and
     expenses of collection, including the reasonable compensation, expenses,
     disbursements and advances of the Trustee, its agents and counsel.

          The Company further covenants that, if the Maturity Consideration or
     any interest due on the Maturity Date is not delivered or paid in respect
     of any STRYPES on the Maturity Date, the Company will, upon demand of the
     Trustee, pay to it, for the benefit of the Holders of such STRYPES, the
     Maturity Consideration then due and payable on such STRYPES, the whole
     amount of interest then due and payable on such STRYPES and, to the extent
     that payment of such interest shall be legally enforceable, interest on any
     Maturity Consideration that is overdue and on any overdue interest, at the
     rate borne by the STRYPES, and, in addition thereto, such further amount as
     shall be sufficient to cover the costs and expenses of collection,
     including the reasonable compensation, expenses, disbursements and advances
     of the Trustee, its agents and counsel."

     (e)   By deleting Section 506 of the Principal Indenture in its entirety
and inserting in its stead the following:

     "SECTION 506.  Application of Money Collected.  Any money collected by the
     Trustee pursuant to this Article shall be

                                       17
<PAGE>
 
     applied in the following order, at the date or dates fixed by the Trustee
     and, in case of the distribution of such money on account of the Maturity
     Consideration or interest, upon presentation of the relevant STRYPES
     Certificate and the notation thereon of the payment if only partially paid
     and upon surrender thereof if fully paid:

          FIRST: To the payment of all amounts due the Trustee under Section
     607;

          SECOND: To the payment of any amounts then due and unpaid on the
     STRYPES in respect of which or for the benefit of which such money has been
     collected, ratably, without preference or priority of any kind, according
     to the amounts due and payable on such STRYPES; and

          THIRD: The balance, if any, to the Person or Persons entitled
     thereto."

     (f)   By deleting Section 508 of the Principal Indenture in its entirety
and inserting in its stead the following:

     "SECTION 508.  Unconditional Right of Holders to Receive the Maturity
     Consideration and Interest.  Notwithstanding any other provision in this
     Indenture, the Holder of any STRYPES shall have the right, which is
     absolute and unconditional, to receive (subject to Section 502) payment of
     the Maturity Consideration in respect of and (subject to Sections 305 and
     307) interest on such STRYPES and to institute suit for the enforcement of
     any such payment, and such right shall not be impaired without the consent
     of such Holder."

     (g)   By deleting the first sentence of Section 513 of the Principal
Indenture in its entirety and inserting in its stead the following:

     "The Holders of not less than a majority of the aggregate issue price of
     the Outstanding STRYPES may on behalf of the Holders of all STRYPES waive
     any past default hereunder and its consequences, except a default

          (1) in the delivery or payment of the Maturity Consideration or in the
     payment of interest on any STRYPES, or

          (2) in respect of a covenant or provision hereof which under Article
     Nine cannot be modified or amended without the consent of the Holder of
     each Outstanding STRYPES affected."

     (h)   By deleting Section 801 of the Principal Indenture in its entirety
and inserting in its stead the following:

                                       18
<PAGE>
 
     "SECTION 801.  Consolidations and Mergers of the Company and Sales, Leases
     and Conveyances Permitted Subject to Certain Conditions.  The Company may
     consolidate with, or sell, lease or convey all or substantially all of its
     assets to, or merge with or into any other corporation, provided that in
     any such case, (i) either the Company shall be the continuing corporation,
     or the successor corporation shall be a corporation organized and existing
     under the laws of the United States of America or a State thereof and such
     successor corporation shall expressly assume the due and punctual delivery
     or payment of the Maturity Consideration in respect of and interest on all
     the STRYPES, according to their tenor, and the due and punctual performance
     and observance of all of the covenants and conditions of this Indenture to
     be performed by the Company by supplemental indenture satisfactory to the
     Trustee, executed and delivered to the Trustee by such corporation, and
     (ii) the Company or such successor corporation, as the case may be, shall
     not, immediately after such merger or consolidation, or such sale, lease or
     conveyance, be in default in the performance of any such covenant or
     condition."

     (i)   By deleting the first sentence of Section 902 of the Principal
Indenture in its entirety and inserting in its stead the following:

     "With the consent of the Holders of not less than 66-2/3% of the aggregate
     issue price of the Outstanding STRYPES, by Act of said Holders delivered to
     the Company and the Trustee, the Company, when authorized by a Board
     Resolution, and the Trustee may enter into an indenture or indentures
     supplemental hereto for the purpose of adding any provisions to or changing
     in any manner or eliminating any of the provisions of this Indenture or of
     modifying in any manner the rights of the Holders of STRYPES under this
     Indenture; provided, however, that no such supplemental indenture shall,
     without the consent of the Holder of each Outstanding STRYPES affected
     thereby,

          (1) change the Maturity Date or the Stated Maturity of any installment
     of interest on any STRYPES, or reduce the amount of Maturity Consideration
     deliverable or payable on the Maturity Date or reduce the amount of
     interest payable on any STRYPES or reduce the amount of cash payable with
     respect to any STRYPES upon acceleration of the Maturity, or change any
     Place of Payment where, or the coin or currency in which, any interest on
     or any amount of cash payable with respect to any STRYPES is payable, or
     impair the right to institute suit for the enforcement of (i) any payment
     on or with respect to any STRYPES or (ii) the delivery or payment of the
     Maturity Consideration with respect to any STRYPES, or

                                       19
<PAGE>
 
          (2) reduce the percentage of the aggregate issue price of Outstanding
     STRYPES, the consent of whose Holders is required for any such supplemental
     indenture, or the consent of whose Holders is required for waiver (of
     compliance with certain provisions of this Indenture or certain defaults
     hereunder and their consequences) provided for in this Indenture, or reduce
     the requirements of Section 1404 for quorum or voting, or

          (3) modify any of the provisions of this Section, or Section 513, or
     Section 1007, except to increase any such percentage or to provide that
     certain other provisions of this Indenture cannot be modified or waived
     without the consent of the Holder of each Outstanding STRYPES affected
     thereby.

     (j)   By deleting Section 1001 of the Principal Indenture in its entirety
and inserting in its stead the following:

     "SECTION 1001.  Delivery and Payment of the Maturity Consideration and
     Interest.  The Company covenants and agrees for the benefit of the Holders
     of the STRYPES that it will duly and punctually deliver or pay the Maturity
     Consideration in respect of, and interest on, the STRYPES in accordance
     with the terms of the STRYPES and this Indenture."

     (k)   By deleting Section 1003 of the Principal Indenture in its entirety
and inserting in its stead the following:

     "SECTION 1003.  Money for Security Payments to Be Held in Trust.  If the
     Company shall at any time act as its own Paying Agent, it will, on or
     before each due date of the Maturity Consideration in respect of, or
     interest on, any of the STRYPES, segregate and hold in trust for the
     benefit of the Persons entitled thereto consideration in an amount
     sufficient to deliver or pay the Maturity Consideration or a sum sufficient
     to pay the interest so becoming due until such consideration shall be
     delivered or paid to such Persons or otherwise disposed of as herein
     provided and will promptly notify the Trustee of its action or failure so
     to act.

     Whenever the Company shall have one or more Paying Agents, it will, prior
     to each due date of the Maturity Consideration in respect of, or interest
     on, any STRYPES, deposit with a Paying Agent consideration in an amount
     sufficient to deliver or pay the Maturity Consideration or a sum sufficient
     to pay the interest so becoming due, such consideration to be held as
     provided by the Trust Indenture Act, and (unless such Paying Agent is the
     Trustee) the Company will promptly notify the Trustee of its action or
     failure so to act.

                                       20

<PAGE>
 
     The Company will cause each Paying Agent other than the Trustee to execute
     and deliver to the Trustee an instrument in which such Paying Agent shall
     agree with the Trustee, subject to the provisions of this Section, that
     such Paying Agent will (i) comply with the provisions of the Trust
     Indenture Act applicable to it as Paying Agent and (ii) during the
     continuance of any default by the Company (or any other obligor upon the
     STRYPES) in the making of any payment in respect of the STRYPES, upon the
     written request of the Trustee, forthwith pay to the Trustee all sums held
     in trust by such Paying Agent as such.

     The Company may at any time, for any purpose, pay, or by Company Order
     direct any Paying Agent to pay, to the Trustee all sums held in trust by
     the Company or such Paying Agent, such sums to be held by the Trustee upon
     the same trusts as those upon which such sums were held by the Company or
     such Paying Agent; and, upon such payment by any Paying Agent to the
     Trustee, such Paying Agent shall be released from all further liability
     with respect to such money.

     Any consideration deposited with the Trustee or any Paying Agent, or then
     held by the Company, in trust for the payment of the interest on or
     delivery upon discharge of any STRYPES and remaining unclaimed for two
     years after such consideration has become due and payable shall be paid to
     the Company on Company Request, or (if then held by the Company) shall be
     discharged from such trust; and the Holder of such STRYPES shall
     thereafter, as an unsecured general creditor, look only to the Company for
     payment thereof, and all liability of the Trustee or such Paying Agent with
     respect to such trust consideration, and all liability of the Company as
     trustee thereof, shall thereupon cease; provided, however, that the Trustee
     or such Paying Agent, before being required to make any such repayment, may
     at the expense of the Company cause to be published once, in an Authorized
     Newspaper in each Place of Payment or to be mailed to Holders of the
     STRYPES, or both, notice that such consideration remains unclaimed and
     that, after a date specified therein, which shall not be less than 30 days
     from the date of such publication or mailing, any unclaimed balance of such
     consideration then remaining will be repaid to the Company."

     SECTION 502.       Interpretation of Principal Indenture.  Except as
                        -------------------------------------            
otherwise specifically provided in this Supplemental Indenture, whenever in the
Principal Indenture there is mentioned, in any context, the principal of or
principal amount of any Security of any series or a percentage in principal
amount of the Outstanding Securities of any series, such mention shall be deemed
to be, solely with respect to the STRYPES, the issue price of the STRYPES or a
percentage of the aggregate issue price of the Outstanding STRYPES.

                                       21
<PAGE>
 
                                  ARTICLE SIX

                                 MISCELLANEOUS

     SECTION 601.       Effect of Supplemental Indenture.  The Principal
                        --------------------------------                
Indenture, as supplemented and amended by this Supplemental Indenture and all
other indentures supplemental thereto, is in all respects ratified and
confirmed, and the Principal Indenture, this Supplemental Indenture and all
indentures supplemental thereto shall be read, taken and construed as one and
the same instrument.

     SECTION 602.       Conflict with Trust Indenture Act.  If any provision
                        ---------------------------------                   
hereof limits, qualifies or conflicts with another provision hereof which is
required to be included in this Supplemental Indenture by any of the provisions
of the Trust Indenture Act, such required provision shall control.

     SECTION 603.       Successors and Assigns.  All covenants and agreements in
                        ----------------------                                  
this Supplemental Indenture by the Company shall bind its successors and
assigns, whether so expressed or not.

     SECTION 604.       Separability Clause.  In case any provision in this
                        -------------------                                
Supplemental Indenture or in the STRYPES shall be invalid, illegal or
unenforceable, the validity, legality and enforceability of the remaining
provisions (or of the other series of Securities) shall not in any way be
affected or impaired thereby.

     SECTION 605.       Benefits of Supplemental Indenture.  Nothing in this
                        ----------------------------------                  
Supplemental Indenture, express or implied, shall give to any Person, other than
the parties hereto and their successors hereunder and the Holders of the
STRYPES, any benefit or any legal or equitable right, remedy or claim under this
Supplemental Indenture.

     SECTION 606.       Governing Law.  This Supplemental Indenture and each
                        -------------                                       
STRYPES shall be deemed to be a contract made under the laws of the State of New
York and this Supplemental Indenture and each such STRYPES shall be governed by
and construed in accordance with the laws of the State of New York.

     SECTION 607.       Execution in Counterparts.  This Supplemental Indenture
                        -------------------------                              
may be executed in any number of counterparts, each of which shall be an
original; but such counterparts shall together constitute but one and the same
instrument.

     SECTION 608.       Responsibility for Recitals.  The recitals contained
                        ---------------------------                         
herein shall be taken as statements of the Company, and the Trustee assumes no
responsibility for their correctness.  The Trustee makes no representations as
to the validity or

                                       22
<PAGE>
 
sufficiency of the Principal Indenture or this Supplemental Indenture.

     IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed, and their respective corporate seals to be
hereunto affixed and attested, all as of the day and year first above written.


                                   Merrill Lynch & Co., Inc.


                              
                                   By:  ____________________________
                                        Name:   Theresa Lang
                                        Title:  Treasurer


                                   Chemical Bank, as Trustee 



                                   By:  ____________________________
                                        Name:
                                        Title:

                                       23

<PAGE>
 
                                   EXHIBIT A

                     [Form of Face of STRYPES Certificate]

[THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A
NOMINEE THEREOF.  UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR
SECURITIES IN CERTIFICATED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS
A WHOLE BY THE DEPOSITORY TRUST COMPANY (THE "DEPOSITORY") TO A NOMINEE OF THE
DEPOSITORY OR BY THE DEPOSITORY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITORY OR
A NOMINEE OF SUCH SUCCESSOR DEPOSITORY.  UNLESS THIS SECURITY IS PRESENTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TO THE COMPANY OR ITS AGENT FOR
REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY SECURITY ISSUED IS
REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY (AND ANY PAYMENT IS MADE TO CEDE &
CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF
THE DEPOSITORY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE
BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE &
CO., HAS AN INTEREST HEREIN.]

No. ____________                                            ___________ STRYPES

CUSIP NO. 590188751


                           MERRILL LYNCH & CO., INC.

              Structured Yield Product Exchangeable for Stock/SM/
                      6 1/4% STRYPES/SM/ Due July 1, 2001

                     (Payable with Shares of Common Stock,
                 par value $1.00 per share, of IMC Global Inc.)

                        Issue Price Per STRYPES: $38.25

     Merrill Lynch & Co., Inc., a Delaware corporation (hereinafter called the
"Company", which term includes any successor corporation under the Indenture
hereinafter referred to), for value received, hereby promises to pay and
discharge each STRYPES evidenced hereby on July 1, 2001 (the "Maturity Date") by
delivering to _____________________________________, or registered assigns, a
percentage of the amount or number of each type of Reference Security and other
property then constituting part of the Reference Property (as defined below)
determined in accordance with the provisions set forth below, and to pay
interest (computed on the basis of a 360-day year of twelve 30-day months) on
such STRYPES from July 9, 1996, or from the most recent Interest Payment Date to
which interest has been paid or duly provided for, on January 1, April 1, July 1
and October 1 in 

                                       24
<PAGE>
 
each year, commencing October 1, 1996 and on the Maturity Date, at the rate of
$2.3908 per STRYPES per annum (or $.5977 per STRYPES per quarter), until the
Maturity Date or such earlier date on which the Issue Price is repaid in
accordance with the provisions described below. The interest so payable, and
punctually paid or duly provided for, on any Interest Payment Date will, as
provided in said Indenture, be paid to the Person in whose name this STRYPES
Certificate (or one or more Predecessor STRYPES Certificates) is registered at
the close of business on the fifteenth calendar day (whether or not a Business
Day) immediately preceding such Interest Payment Date (each a "Regular Record
Date"). In any case where such Interest Payment Date shall not be a Business
Day, then (notwithstanding any other provision of said Indenture or this STRYPES
Certificate) payment of such interest need not be made on such date, but may be
made on the next succeeding Business Day with the same force and effect as if
made on such date, and, if such payment is so made, no interest shall accrue for
the period from and after such date. Any such interest not so punctually paid or
duly provided for shall forthwith cease to be payable to the registered Holder
on the relevant Regular Record Date, and may be paid to the Person in whose name
this STRYPES Certificate (or one or more Predecessor STRYPES Certificates) is
registered at the close of business on a Special Record Date for the payment of
such interest to be fixed by the Trustee hereinafter referred to, notice whereof
shall be given to Holders of STRYPES not less than 10 days prior to such Special
Record Date, or may be paid at any time in any other lawful manner not
inconsistent with the requirements of any securities exchange on which the
STRYPES may be listed, and upon such notice as may be required by such exchange,
all as more fully provided in said Indenture.

     On the Maturity Date, the Company shall pay and discharge each STRYPES
evidenced hereby by delivering to the Holder:  (a) if the Reference Property
Value (as defined below) is greater than or equal to $46.28 (the "Threshold
Appreciation Price"), 82.65% of the amount or number of each type of Reference
Security and other property constituting part of the Reference Property, (b) if
the Reference Property Value is less than the Threshold Appreciation Price but
is greater than $38.25 (the "Initial Price"), a percentage of the amount or
number of each type of Reference Security and other property constituting part
of the Reference Property, allocated as proportionately as practicable, so that
the aggregate value thereof is equal to the Initial Price and (c) if the
Reference Property Value is less than or equal to the Initial Price, 100% of the
amount or number of each type of Reference Security and other property
constituting part of the Reference Property.  Notwithstanding the foregoing, the
Company may, at its option in lieu of delivering the applicable percentage of
each type of Reference Security and other property constituting part of the
Reference Property on the Maturity Date, deliver cash in an amount (calculated
to the nearest 1/100th of a dollar per STRYPES or, if there is not a nearest
1/100th of a 

                                       25
<PAGE>
 
dollar, then to the next higher 1/100th of a dollar) equal to the sum of (a) for
any portion of the Reference Property consisting of cash that is otherwise
deliverable on the Maturity Date, the amount of such cash, without interest
thereon, (b) for any portion of the Reference Property consisting of property
other than cash or Reference Securities that is otherwise deliverable on the
Maturity Date, the fair market value of such property (as determined by a
nationally recognized independent investment banking firm retained for this
purpose by the Company) as of the third Trading Day preceding the Maturity Date,
and (c) for any portion of the Reference Property consisting of a Reference
Security (including IMC Common Stock) that is otherwise deliverable on the
Maturity Date, an amount equal to the average Closing Price per unit of such
Reference Security on the 20 Trading Days immediately prior to, but not
including, the second Trading Day preceding the Maturity Date multiplied by the
number of units of such Reference Security constituting a part of the Reference
Property, all as provided in the Indenture. Such number or amount of each type
of Reference Security and other property constituting part of the Reference
Property (or, pursuant to the Company's option, the amount of cash in lieu
thereof) deliverable upon payment and discharge hereof on the Maturity Date is
hereinafter referred to as the "Maturity Consideration." 

     The term "Reference Property" initially means one share of common stock,
par value $1.00 per share (the "IMC Common Stock"), of IMC Global Inc., a
Delaware corporation ("IMC Global"), including the preferred stock purchase
right associated therewith, and shall be subject to adjustment from time to time
prior to the Maturity Date to reflect the addition or substitution of any cash,
securities and/or other property as provided for in the Indenture. The term
"Reference Security" means, at any time, any security (as defined in Section
2(1) of the Securities Act of 1933, as amended) then constituting part of the
Reference Property. The term "Reference Property Value" means, subject to the
provisions of the Indenture, the sum of (a) for any portion of the Reference
Property consisting of cash, the amount of such cash, (b) for any portion of the
Reference Property consisting of property other than cash or Reference
Securities, the fair market value of such property (as determined by a
nationally recognized independent investment banking firm retained for this
purpose by the Company) as of the third Trading Day preceding the Maturity Date,
and (c) for any portion of the Reference Property consisting of a Reference
Security (including IMC Common Stock), an amount equal to the average Closing
Price per unit of such Reference Security on the 20 Trading Days immediately
prior to, but not including, the second Trading Day preceding the Maturity Date
multiplied by the number of units of such Reference Security constituting part
of the Reference Property. The term "Closing Price" means, with respect to any
Reference Security on any date of determination, the closing sale price (or, if
no closing price is reported, the last reported sale price) of such Reference
Security on the NYSE on such date or, if such Reference Security

                                       26
<PAGE>
 
is not listed for trading on the NYSE on any such date, as reported in the
composite transactions for the principal United States securities exchange on
which such Reference Security is so listed, or if such Reference Security is not
so listed on a United States national or regional securities exchange, as
reported by the National Association of Securities Dealers, Inc. Automated
Quotation System, or, if such Reference Security is not so reported, the last
quoted bid price for such Reference Security in the over-the-counter market as
reported by the National Quotation Bureau or similar organization, or, if such
bid price is not available, the market value of such Reference Security on such
date as determined by a nationally recognized independent investment banking
firm retained for this purpose by the Company. The term "Trading Day" means,
with respect to any Reference Security the Closing Price of which is being
determined, a day on which such Reference Security (A) is not suspended from
trading on any national or regional securities exchange or association or over-
the-counter market at the close of business and (B) has traded at least once on
the national or regional securities exchange or association or over-the-counter
market that is the primary market for the trading of such Reference Security.

     Interest on the STRYPES evidenced hereby will be payable, and delivery of
the Maturity Consideration in payment of the STRYPES evidenced hereby on the
Maturity Date will be made, upon surrender of this STRYPES Certificate, at the
office or agency of the Company maintained for that purpose in the Borough of
Manhattan, The City of New York, and payment of interest on the STRYPES
evidenced by this STRYPES Certificate (and, if the Company elects to deliver
cash in lieu of the applicable percentage of each type of Reference Property on
the Maturity Date, the amount of cash payable on the Maturity Date) will be made
in such coin or currency of the United States of America as at the time of
payment is legal tender for payment of public and private debts; provided,
however, that at the option of the Company payment of interest may be made by
check mailed to the address of the Person entitled thereto as such address shall
appear on the Securities Register.

     ADDITIONAL PROVISIONS OF THIS STRYPES CERTIFICATE ARE CONTAINED ON THE
REVERSE HEREOF AND SUCH PROVISIONS SHALL HAVE THE SAME EFFECT AS THOUGH FULLY
SET FORTH IN THIS PLACE.

     Unless the certificate of authentication hereon has been executed by or on
behalf of the Trustee by manual signature, this STRYPES Certificate shall not be
entitled to any benefit under the Indenture, or be valid or obligatory for any
purpose.

                                       27
<PAGE>
 
"Structured Yield Product Exchangeable for Stock" and "STRYPES" are service
marks of Merrill Lynch & Co., Inc.

     IN WITNESS WHEREOF, Merrill Lynch & Co., Inc. has caused this instrument to
be duly executed under its corporate seal.

Dated:
                                   Merrill Lynch & Co., Inc.



                                   By:_____________________________
                                      Name:  Theresa Lang
                                      Title: Treasurer


Attest:________________________
       Name:
       Title:


                    TRUSTEE'S CERTIFICATE OF AUTHENTICATION

     This certificate evidences Securities of the series designated herein and
referred to in the within-mentioned Indenture.


                                   Chemical Bank, as Trustee



                                   By:_______________________________
                                      Authorized Officer

                                       28
<PAGE>
 
                    [Form of Reverse of STRYPES Certificate]

                           MERRILL LYNCH & CO., INC.

                Structured Yield Product Exchangeable for Stock
                        6 1/4% STRYPES Due July 1, 2001

      (Payable with Shares of Common Stock, par value $1.00 per share,   
                              of IMC Global Inc.)


     This STRYPES Certificate evidences part of a duly authorized issue of
unsecured and unsubordinated debentures, notes or other evidences of senior
indebtedness (hereinafter called the "Securities") of the Company of the series
hereinafter specified, all such Securities issued and to be issued under an
indenture dated as of April 1, 1983 and restated as of April 1, 1987, as amended
and supplemented as of July 1, 1996, between the Company and Chemical Bank
(successor by merger to Manufacturers Hanover Trust Company), as Trustee (the
indenture dated as of April 1, 1983 and restated as of April 1, 1987, as
amended, restated and supplemented from time to time, the "Indenture"), to which
Indenture and all other indentures supplemental thereto reference is hereby made
for a statement of the rights and limitation of rights thereunder of the Holders
of the Securities and of the rights, obligations, duties and immunities of the
Trustee for each series of Securities and of the Company, and the terms upon
which the Securities are and are to be authenticated and delivered.  As provided
in the Indenture, the Securities may be issued in one or more series, which
different series may be issued in various aggregate principal amounts, may be
denominated in currencies other than U.S. Dollars (including composite
currencies), may mature at different times, may bear interest, if any, at
different rates, may be subject to different redemption provisions, if any, may
be subject to different sinking, purchase and analogous funds, if any, may be
subject to different covenants and Events of Default and may otherwise vary as
in the Indenture provided or permitted.  This STRYPES Certificate evidences
Securities of the series designated as Structured Yield Product Exchangeable for
Stock, 6 1/4% STRYPES Due July 1, 2001 (each, a "STRYPES").

     The STRYPES are not subject to any sinking fund or other mandatory
redemption provisions.  The STRYPES are not payable at the option of the Holders
prior to the Maturity Date.

     If an Event of Default with respect to the STRYPES, as defined in the
Indenture, shall occur and be continuing, then an amount equal to the issue
price of all the STRYPES may be declared immediately due and payable in cash in
the manner and with the effect provided in the Indenture.

                                       29
<PAGE>
 
     The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the STRYPES under the Indenture at any
time by the Company and the Trustee with the consent of the Holders of 66-2/3%
of the aggregate issue price of the Outstanding STRYPES.  The Indenture also
contains provisions permitting the Holders of a majority of the aggregate issue
price of the Outstanding STRYPES, on behalf of the Holders of all STRYPES, to
waive compliance by the Company with certain provisions of the Indenture and
certain past defaults under the Indenture and their consequences with respect to
the STRYPES.  Any such consent or waiver by the Holder of this Security shall be
conclusive and binding upon such Holder and upon all future Holders of the
STRYPES evidenced by this STRYPES Certificate and of any STRYPES evidenced by a
STRYPES Certificate issued upon the transfer hereof or in exchange herefor or in
lieu hereof whether or not notation of such consent of waiver is made upon this
STRYPES Certificate.

     No reference herein to the Indenture and no provision of this STRYPES
Certificate or of the Indenture shall alter or impair the obligation of the
Company, which is absolute and unconditional, to deliver or pay the interest on,
and Maturity Consideration in respect of, the STRYPES evidenced by this STRYPES
Certificate at the times, place and rate, and in the manner, herein prescribed.

     As provided in the Indenture and subject to certain limitations therein set
forth, the STRYPES evidenced by this STRYPES Certificate are transferable on the
Security Register of the Company, upon surrender of this STRYPES Certificate for
registration of transfer at the office or agency of the Company to be maintained
for that purpose in The City of New York, New York, or at any other office or
agency of the Company maintained for that purpose, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new STRYPES
Certificates, evidencing the same aggregate number of STRYPES, will be issued to
the designated transferee or transferees.

     No service charge shall be made for any such transfer or exchange, but the
Company may require payment of a sum sufficient to cover any tax or other
governmental charge payable in connection with the registration of such transfer
or exchange, other than certain exchanges not involving any transfer.  Certain
terms used in this STRYPES Certificate which are defined in the Indenture have
the meanings set forth therein.

                                       30
<PAGE>
 
     This STRYPES Certificate shall for all purposes be governed by, and
construed in accordance with, the laws of the State of New York.  The Company,
the Trustee and any agent of the Company or the Trustee may treat the Person in
whose name this STRYPES Certificate is registered as the owner of the STRYPES
evidenced hereby for the purpose of receiving payment as herein provided and for
all other purposes, whether or not the STRYPES be overdue, and neither the
Company, the Trustee nor any such agent shall be affected by notice to the
contrary.

                                       31
<PAGE>
 
                                 ABBREVIATIONS

The following abbreviations, when used in the inscription on the face of this
instrument, shall be construed as though they were written out in full according
to applicable laws or regulations.
 
 
TEN COM  --  as tenants in  UNIF GIFT MIN -- _____ Custodian ____
             common                          (Cust)        (Minor)
TEN ENT  --  as tenants by the           Under Uniform Gifts to Minors
             entireties                  Act _________________
                                                 (State)


JT TEN  -- as joint tenants with
         right of survivorship
         and not as tenants in common

Additional abbreviations may also be used though not in the above list.

                                   ASSIGNMENT

FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s)
unto

PLEASE INSERT SOCIAL SECURITY
OR TAXPAYER I.D. OR OTHER
IDENTIFYING NUMBER OF
ASSIGNEE

- --------------------------------------------------------------------------------
          (Please print or typewrite name and address including postal
                             zip code of assignee)

___________________________ STRYPES and all rights thereunder, hereby
irrevocably constituting and appointing

attorney to transfer said STRYPES on the books of the Company, with full power
of substitution in the premises.

Dated:

                   -------------------------------------------
                   NOTICE: The signature to this assignment 
                   must correspond with the name as written 
                   upon the face of the within Security
                   in every particular, without alteration 
                   or enlargement or any change whatever.

                                       32

<PAGE>
 
                                                                    EXHIBIT 4(c)
                     [Form of Face of STRYPES Certificate]

[THIS SECURITY IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE
HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITORY OR A
NOMINEE THEREOF.  UNLESS AND UNTIL IT IS EXCHANGED IN WHOLE OR IN PART FOR
SECURITIES IN CERTIFICATED FORM, THIS SECURITY MAY NOT BE TRANSFERRED EXCEPT AS
A WHOLE BY THE DEPOSITORY TRUST COMPANY (THE "DEPOSITORY") TO A NOMINEE OF THE
DEPOSITORY OR BY THE DEPOSITORY OR ANY SUCH NOMINEE TO A SUCCESSOR DEPOSITORY OR
A NOMINEE OF SUCH SUCCESSOR DEPOSITORY.  UNLESS THIS SECURITY IS PRESENTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TO THE COMPANY OR ITS AGENT FOR
REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY SECURITY ISSUED IS
REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY (AND ANY PAYMENT IS MADE TO CEDE &
CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF
THE DEPOSITORY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE
BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE &
CO., HAS AN INTEREST HEREIN.]

No. ____________                                            ___________ STRYPES

CUSIP NO. 590188751


                           MERRILL LYNCH & CO., INC.

              Structured Yield Product Exchangeable for Stock/SM/
                      6 1/4% STRYPES/SM/ Due July 1, 2001

                     (Payable with Shares of Common Stock,
                 par value $1.00 per share, of IMC Global Inc.)

                        Issue Price Per STRYPES: $38.25_

     Merrill Lynch & Co., Inc., a Delaware corporation (hereinafter called the
"Company", which term includes any successor corporation under the Indenture
hereinafter referred to), for value received, hereby promises to pay and
discharge each STRYPES evidenced hereby on July 1, 2001 (the "Maturity Date") by
delivering to _____________________________________, or registered assigns, a
percentage of the amount or number of each type of Reference Security and other
property then constituting part of the Reference Property (as defined below)
determined in accordance with the provisions set forth below, and to pay
interest (computed on the basis of a 360-day year of twelve 30-day months) on
such STRYPES from July 9, 1996, or from the most recent Interest Payment Date to
which interest has been paid or duly provided for, on January 1, April 1, July 1
and October 1 in each year, commencing October 1, 1996 and on the Maturity Date,
<PAGE>
 
at the rate of $2.3908 per STRYPES per annum (or $.5977 per STRYPES per
quarter), until the Maturity Date or such earlier date on which the Issue Price
is repaid in accordance with the provisions described below.  The interest so
payable, and punctually paid or duly provided for, on any Interest Payment Date
will, as provided in said Indenture, be paid to the Person in whose name this
STRYPES Certificate (or one or more Predecessor STRYPES Certificates) is
registered at the close of business on the fifteenth calendar day (whether or
not a Business Day) immediately preceding such Interest Payment Date (each a
"Regular Record Date").  In any case where such Interest Payment Date shall not
be a Business Day, then (notwithstanding any other provision of said Indenture
or this STRYPES Certificate) payment of such interest need not be made on such
date, but may be made on the next succeeding Business Day with the same force
and effect as if made on such date, and, if such payment is so made, no interest
shall accrue for the period from and after such date.  Any such interest not so
punctually paid or duly provided for shall forthwith cease to be payable to the
registered Holder on the relevant Regular Record Date, and may be paid to the
Person in whose name this STRYPES Certificate (or one or more Predecessor
STRYPES Certificates) is registered at the close of business on a Special Record
Date for the payment of such interest to be fixed by the Trustee hereinafter
referred to, notice whereof shall be given to Holders of STRYPES not less than
10 days prior to such Special Record Date, or may be paid at any time in any
other lawful manner not inconsistent with the requirements of any securities
exchange on which the STRYPES may be listed, and upon such notice as may be
required by such exchange, all as more fully provided in said Indenture.

     On the Maturity Date, the Company shall pay and discharge each STRYPES
evidenced hereby by delivering to the Holder:  (a) if the Reference Property
Value (as defined below) is greater than or equal to $46.28 (the "Threshold
Appreciation Price"), 82.65% of the amount or number of each type of Reference
Security and other property constituting part of the Reference Property, (b) if
the Reference Property Value is less than the Threshold Appreciation Price but
is greater than $38.25 (the "Initial Price"), a percentage of the amount or
number of each type of Reference Security and other property constituting part
of the Reference Property, allocated as proportionately as practicable, so that
the aggregate value thereof is equal to the Initial Price and (c) if the
Reference Property Value is less than or equal to the Initial Price, 100% of the
amount or number of each type of Reference Security and other property
constituting part of the Reference Property.  Notwithstanding the foregoing, the
Company may, at its option in lieu of delivering the applicable percentage of
each type of Reference Security and other property constituting part of the
Reference Property on the Maturity Date, deliver cash in an amount (calculated
to the nearest 1/100th of a dollar per STRYPES or, if there is not a nearest
1/100th of a

                                       2
<PAGE>
 
dollar, then to the next higher 1/100th of a dollar) equal to the sum of (a) for
any portion of the Reference Property consisting of cash that is otherwise
deliverable on the Maturity Date, the amount of such cash, without interest
thereon, (b) for any portion of the Reference Property consisting of property
other than cash or Reference Securities that is otherwise deliverable on the
Maturity Date, the fair market value of such property (as determined by a
nationally recognized independent investment banking firm retained for this
purpose by the Company) as of the third Trading Day preceding the Maturity Date,
and (c) for any portion of the Reference Property consisting of a Reference
Security (including IMC Common Stock) that is otherwise deliverable on the
Maturity Date, an amount equal to the average Closing Price per unit of such
Reference Security on the 20 Trading Days immediately prior to, but not
including, the second Trading Day preceding the Maturity Date multiplied by the
number of units of such Reference Security constituting a part of the Reference
Property, all as provided in the Indenture.  Such number or amount of each type
of Reference Security and other property constituting part of the Reference
Property (or, pursuant to the Company's option, the amount of cash in lieu
thereof) deliverable upon payment and discharge hereof on the Maturity Date is
hereinafter referred to as the "Maturity Consideration."

     The term "Reference Property" initially means one share of common stock,
par value $1.00 per share (the "IMC Common Stock"), of IMC Global Inc., a
Delaware corporation ("IMC Global"), including the preferred stock purchase
right associated therewith, and shall be subject to adjustment from time to time
prior to the Maturity Date to reflect the addition or substitution of any cash,
securities and/or other property as provided for in the Indenture. The term
"Reference Security" means, at any time, any security (as defined in Section
2(1) of the Securities Act of 1933, as amended) then constituting part of the
Reference Property. The term "Reference Property Value" means, subject to the
provisions of the Indenture, the sum of (a) for any portion of the Reference
Property consisting of cash, the amount of such cash, (b) for any portion of the
Reference Property consisting of property other than cash or Reference
Securities, the fair market value of such property (as determined by a
nationally recognized independent investment banking firm retained for this
purpose by the Company) as of the third Trading Day preceding the Maturity Date,
and (c) for any portion of the Reference Property consisting of a Reference
Security (including IMC Common Stock), an amount equal to the average Closing
Price per unit of such Reference Security on the 20 Trading Days immediately
prior to, but not including, the second Trading Day preceding the Maturity Date
multiplied by the number of units of such Reference Security constituting part
of the Reference Property. The term "Closing Price" means, with respect to any
Reference Security on any date of determination, the closing sale price (or, if
no closing price is reported, the last reported sale price) of such Reference

                                       3
<PAGE>
 
Security on the NYSE on such date or, if such Reference Security is not listed
for trading on the NYSE on any such date, as reported in the composite
transactions for the principal United States securities exchange on which such
Reference Security is so listed, or if such Reference Security is not so listed
on a United States national or regional securities exchange, as reported by the
National Association of Securities Dealers, Inc. Automated Quotation System, or,
if such Reference Security is not so reported, the last quoted bid price for
such Reference Security in the over-the-counter market as reported by the
National Quotation Bureau or similar organization, or, if such bid price is not
available, the market value of such Reference Security on such date as
determined by a nationally recognized independent investment banking firm
retained for this purpose by the Company.  The term "Trading Day" means, with
respect to any Reference Security the Closing Price of which is being
determined, a day on which such Reference Security (A) is not suspended from
trading on any national or regional securities exchange or association or over-
the-counter market at the close of business and (B) has traded at least once on
the national or regional securities exchange or association or over-the-counter
market that is the primary market for the trading of such Reference Security.

     Interest on the STRYPES evidenced hereby will be payable, and delivery of
the Maturity Consideration in payment of the STRYPES evidenced hereby on the
Maturity Date will be made, upon surrender of this STRYPES Certificate, at the
office or agency of the Company maintained for that purpose in the Borough of
Manhattan, The City of New York, and payment of interest on the STRYPES
evidenced by this STRYPES Certificate (and, if the Company elects to deliver
cash in lieu of the applicable percentage of each type of Reference Property on
the Maturity Date, the amount of cash payable on the Maturity Date) will be made
in such coin or currency of the United States of America as at the time of
payment is legal tender for payment of public and private debts; provided,
however, that at the option of the Company payment of interest may be made by
check mailed to the address of the Person entitled thereto as such address shall
appear on the Securities Register.

     ADDITIONAL PROVISIONS OF THIS STRYPES CERTIFICATE ARE CONTAINED ON THE
REVERSE HEREOF AND SUCH PROVISIONS SHALL HAVE THE SAME EFFECT AS THOUGH FULLY
SET FORTH IN THIS PLACE.

     Unless the certificate of authentication hereon has been executed by or on
behalf of the Trustee by manual signature, this STRYPES Certificate shall not be
entitled to any benefit under the Indenture, or be valid or obligatory for any
purpose.

                                       4
<PAGE>
 
"Structured Yield Product Exchangeable for Stock" and "STRYPES" are service
marks of Merrill Lynch & Co., Inc.

     IN WITNESS WHEREOF, Merrill Lynch & Co., Inc. has caused this instrument to
be duly executed under its corporate seal.

Dated:
                                 Merrill Lynch & Co., Inc.
                                 
                                 
                                 
                                 By:_________________________________
                                    Name:  Theresa Lang
                                    Title:  Treasurer


Attest:________________________
       Name:
       Title:


                    TRUSTEE'S CERTIFICATE OF AUTHENTICATION

     This certificate evidences Securities of the series designated herein and
referred to in the within-mentioned Indenture.


                              Chemical Bank, as Trustee



                              By:_______________________________
                                       Authorized Officer

                                       5
<PAGE>
 
                    [Form of Reverse of STRYPES Certificate]

                           MERRILL LYNCH & CO., INC.

                Structured Yield Product Exchangeable for Stock
                        6 1/4% STRYPES Due July 1, 2001

       (Payable with Shares of Common Stock, par value $1.00 per share, 
                              of IMC Global Inc.)


     This STRYPES Certificate evidences part of a duly authorized issue of
unsecured and unsubordinated debentures, notes or other evidences of senior
indebtedness (hereinafter called the "Securities") of the Company of the series
hereinafter specified, all such Securities issued and to be issued under an
indenture dated as of April 1, 1983 and restated as of April 1, 1987, as amended
and supplemented as of July 1, 1996, between the Company and Chemical Bank
(successor by merger to Manufacturers Hanover Trust Company), as Trustee (the
indenture dated as of April 1, 1983 and restated as of April 1, 1987, as
amended, restated and supplemented from time to time, the "Indenture"), to which
Indenture and all other indentures supplemental thereto reference is hereby made
for a statement of the rights and limitation of rights thereunder of the Holders
of the Securities and of the rights, obligations, duties and immunities of the
Trustee for each series of Securities and of the Company, and the terms upon
which the Securities are and are to be authenticated and delivered.  As provided
in the Indenture, the Securities may be issued in one or more series, which
different series may be issued in various aggregate principal amounts, may be
denominated in currencies other than U.S. Dollars (including composite
currencies), may mature at different times, may bear interest, if any, at
different rates, may be subject to different redemption provisions, if any, may
be subject to different sinking, purchase and analogous funds, if any, may be
subject to different covenants and Events of Default and may otherwise vary as
in the Indenture provided or permitted.  This STRYPES Certificate evidences
Securities of the series designated as Structured Yield Product Exchangeable for
Stock, 6 1/4% STRYPES Due July 1, 2001 (each, a "STRYPES").

     The STRYPES are not subject to any sinking fund or other mandatory
redemption provisions.  The STRYPES are not payable at the option of the Holders
prior to the Maturity Date.

     If an Event of Default with respect to the STRYPES, as defined in the
Indenture, shall occur and be continuing, then an amount equal to the issue
price of all the STRYPES may be declared immediately due and payable in cash in
the manner and with the effect provided in the Indenture.

                                       6
<PAGE>
 
     The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the STRYPES under the Indenture at any
time by the Company and the Trustee with the consent of the Holders of 66-2/3%
of the aggregate issue price of the Outstanding STRYPES.  The Indenture also
contains provisions permitting the Holders of a majority of the aggregate issue
price of the Outstanding STRYPES, on behalf of the Holders of all STRYPES, to
waive compliance by the Company with certain provisions of the Indenture and
certain past defaults under the Indenture and their consequences with respect to
the STRYPES.  Any such consent or waiver by the Holder of this Security shall be
conclusive and binding upon such Holder and upon all future Holders of the
STRYPES evidenced by this STRYPES Certificate and of any STRYPES evidenced by a
STRYPES Certificate issued upon the transfer hereof or in exchange herefor or in
lieu hereof whether or not notation of such consent of waiver is made upon this
STRYPES Certificate.

     No reference herein to the Indenture and no provision of this STRYPES
Certificate or of the Indenture shall alter or impair the obligation of the
Company, which is absolute and unconditional, to deliver or pay the interest on,
and Maturity Consideration in respect of, the STRYPES evidenced by this STRYPES
Certificate at the times, place and rate, and in the manner, herein prescribed.

     As provided in the Indenture and subject to certain limitations therein set
forth, the STRYPES evidenced by this STRYPES Certificate are transferable on the
Security Register of the Company, upon surrender of this STRYPES Certificate for
registration of transfer at the office or agency of the Company to be maintained
for that purpose in The City of New York, New York, or at any other office or
agency of the Company maintained for that purpose, duly endorsed by, or
accompanied by a written instrument of transfer in form satisfactory to the
Company and the Security Registrar duly executed by, the Holder hereof or his
attorney duly authorized in writing, and thereupon one or more new STRYPES
Certificates, evidencing the same aggregate number of STRYPES, will be issued to
the designated transferee or transferees.

     No service charge shall be made for any such transfer or exchange, but the
Company may require payment of a sum sufficient to cover any tax or other
governmental charge payable in connection with the registration of such transfer
or exchange, other than certain exchanges not involving any transfer.  Certain
terms used in this STRYPES Certificate which are defined in the Indenture have
the meanings set forth therein.

                                       7
<PAGE>
 
     This STRYPES Certificate shall for all purposes be governed by, and
construed in accordance with, the laws of the State of New York.  The Company,
the Trustee and any agent of the Company or the Trustee may treat the Person in
whose name this STRYPES Certificate is registered as the owner of the STRYPES
evidenced hereby for the purpose of receiving payment as herein provided and for
all other purposes, whether or not the STRYPES be overdue, and neither the
Company, the Trustee nor any such agent shall be affected by notice to the
contrary.

                                       8
<PAGE>
 
                                 ABBREVIATIONS

The following abbreviations, when used in the inscription on the face of this
instrument, shall be construed as though they were written out in full according
to applicable laws or regulations.
 
 
TEN COM  --  as tenants in  UNIF GIFT MIN -- _____ Custodian ____
             common                        (Cust)         (Minor)
TEN ENT  --  as tenants by the      Under Uniform Gifts to Minors
             entireties             Act _________________
                                           (State)


JT TEN  -- as joint tenants with
         right of survivorship
         and not as tenants in common

Additional abbreviations may also be used though not in the above list.

                                   ASSIGNMENT

FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s)
unto

PLEASE INSERT SOCIAL SECURITY
OR TAXPAYER I.D. OR OTHER
IDENTIFYING NUMBER OF
ASSIGNEE

- --------------------------------------------------------------------------------
          (Please print or typewrite name and address including postal
                             zip code of assignee)

___________________________ STRYPES and all rights thereunder, hereby
irrevocably constituting and appointing

attorney to transfer said STRYPES on the books of the Company, with full power
of substitution in the premises.

Dated:

                    --------------------------------------------------------
                    NOTICE: The signature to this assignment must correspond
                    with the name as written upon the face of the within
                    Security in every particular, without alteration or
                    enlargement or any change whatever.

                                       9

<PAGE>
 
                                                                      EXHIBIT 10
                               PURCHASE AGREEMENT
                               ------------------

     THIS AGREEMENT is made as of this 2nd day of July, 1996 between MERRILL
LYNCH MORTGAGE CAPITAL INC. ("Purchaser"), a Delaware corporation and a wholly-
owned subsidiary of Merrill Lynch & Co., Inc., a Delaware corporation ("ML &
Co."), ML & Co. and GVI HOLDINGS, INC., a Delaware corporation ("Seller").

     WHEREAS, ML & Co. has filed with the Securities and Exchange Commission
(the "SEC") a registration statement on Form S-3 (File No. 33-65135) and Post-
Effective Amendment Nos. 3 and 5 thereto contemplating the offering of up to
6,510,286 of its Structured Yield Product Exchangeable for Stock/SM/, 6 1/4%
STRYPES/SM/ Due July 1, 2001 (the "STRYPES"), the terms of which require ML &
Co. to pay and discharge the STRYPES on July 1, 2001 (the "Maturity Date") by
delivering to the holders thereof the Maturity Consideration.

     WHEREAS, ML & Co. has agreed, pursuant to an underwriting agreement dated
the date hereof (the "Underwriting Agreement") among ML & Co., Seller and
Merrill Lynch & Co., Merrill Lynch, Pierce, Fenner & Smith Incorporated (the
"Underwriter"), to issue and sell to the Underwriter an aggregate of 5,661,119
STRYPES (the "Initial STRYPES") and, at the Underwriter's option, all or any
part of 849,167 additional STRYPES (the "Option STRYPES") to cover over-
allotments, if any.

     WHEREAS, the STRYPES are to be issued under an indenture, dated as of April
1, 1983 and restated as of April 1, 1987 (as amended and supplemented, the
"Principal Indenture"), between ML & Co. and Chemical Bank (successor by merger
to Manufacturers Hanover Trust Company), as trustee (the "Trustee"), as further
amended and supplemented by the Tenth Supplemental Indenture, dated as of July
1, 1996 (the "Supplemental Indenture"), between ML & Co. and the Trustee,
relating to the STRYPES.  The Principal Indenture, as amended and supplemented
by the Supplemental Indenture, is hereinafter referred to as the "Indenture."

     WHEREAS, in order to obtain the Maturity Consideration required to satisfy
its obligations under the STRYPES, ML & Co. has agreed to purchase from
Purchaser, and Purchaser has agreed to sell to ML & Co., (i) concurrent with the
issuance and sale of the Initial STRYPES, an obligation of Purchaser in the form
of Exhibit A hereto, the aggregate principal amount of which will be equal to
$210,027,515 and the payment terms (other than the interest rate) of which will
be identical to the payment terms of the Initial STRYPES (the "Initial
Subsidiary STRYPES") and (ii) concurrent with each issuance and sale of any
Option STRYPES, an additional obligation of Purchaser in the form of Exhibit A
hereto, the aggregate principal amount of which will be equal to a percentage of
the net proceeds to ML & Co. from the sale of such Option STRYPES and the
payment terms (other than the interest rate) of which will be identical to the
payment terms of such Option STRYPES (an "Option Subsidiary STRYPES"); the
Initial Subsidiary STRYPES and each Option Subsidiary STRYPES are hereinafter
collectively referred to as the "Subsidiary STRYPES."

- ------------------------------------
/SM/ Service mark of Merrill Lynch & Co., Inc.

                                       1
<PAGE>
 
     WHEREAS, in exchange for certain consideration to be paid by Purchaser
hereunder, Purchaser and Seller desire to provide for the future acquisition,
sale and delivery of the aggregate number or amount of each type of Reference
Security and other property constituting part of the Reference Property that
would be required by Purchaser to pay and discharge all of the Subsidiary
STRYPES on the Maturity Date (collectively, the "Subsidiary Maturity
Consideration"), assuming (x) (1) all of the STRYPES are held by the same Holder
at such time and without taking into account any default with respect to the
STRYPES or any acceleration of the maturity of the STRYPES resulting therefrom
and (2) all of the Subsidiary STRYPES are held by the same Holder at such time
and without taking into account any default with respect to the Subsidiary
STRYPES or any acceleration of the maturity of the Subsidiary STRYPES resulting
therefrom and (y) that the fair market value of any Reference Property
consisting of rights or warrants described in Section 303(b) of the Supplemental
Indenture is the value determined pursuant to such Section 303(b), and (z) that
the Purchaser has not elected to deliver cash in lieu of Reference Property
(collectively, the "Contract Consideration") at a price to be established under
this Agreement.

     WHEREAS, Seller owns 6,510,286 shares of the common stock, par value $1.00
per share (the "IMC Common Stock"), of IMC Global Inc., a Delaware corporation
("IMC Global").

     WHEREAS, Seller and Purchaser desire that, at the option of Seller, the
respective future acquisition, sale and delivery obligations can be settled
entirely, but not less than entirely, through cash payment in lieu of delivery
of the Contract Consideration.

     WHEREAS, pursuant to a Pledge Agreement to be dated as of July 9, 1996 (the
"Pledge Agreement"), among Seller, Purchaser and State Street Bank and Trust
Company, as Agent (the "Agent"), 5,661,119 shares of IMC Common Stock initially
will be pledged to secure the obligations of the Seller hereunder.

     WHEREAS, Seller and Purchaser desire that ownership of the Contract
Consideration (including, without limitation, voting rights and rights to
receive any dividends, interest, distributions and other payments in respect
thereof, provided that, to the extent constituting part of the Reference
Property, such dividends, interest, distributions and other payments and the
proceeds of any sale required by the provisions hereof shall be retained by the
Agent in accordance with the provisions hereof or of the Pledge Agreement)
remain in Seller unless and until delivery, if any, of such Contract
Consideration to Purchaser pursuant to the provisions of this Agreement.

     NOW, THEREFORE, in consideration of their mutual covenants herein
contained, the parties hereto, intending to be legally bound, hereby mutually
covenant and agree as follows:

                                       2
<PAGE>
 
                                      1.

                                  Definitions
                                  -----------

     1.1. Definitions.  Capitalized words and phrases used herein and not
          -----------                                                    
otherwise defined shall have the meanings ascribed to them in the Supplemental
Indenture.


                                       2.

            Future Sale of Contract Consideration or Cash Settlement
            --------------------------------------------------------

     2.1. Sale and Purchase.  On the basis of the representations and warranties
          -----------------                                                     
herein contained and subject to the terms and conditions herein set forth, at
the Closing (as defined in Section 2.3 hereof), Seller agrees to assign,
transfer, convey and deliver to Purchaser, and Purchaser agrees to acquire from
Seller, the Contract Consideration.

     2.2. Consideration.  (a)  The consideration to be paid by Purchaser for
          -------------                                                     
Seller's obligation hereunder to deliver (or cause to be delivered) the Contract
Consideration in respect of the Initial Subsidiary STRYPES (the "Firm
Consideration Amount") shall be $153,382,017 in cash.  Upon the terms and
subject to the conditions of this Agreement, Purchaser shall deliver to Seller
the Firm Consideration Amount on July 9, 1996 (the "Firm Payment Date") at the
offices of Brown & Wood LLP, One World Trade Center, New York, New York 10048,
or at such other place as shall be agreed upon by Purchaser and Seller.

     (b) ML & Co. shall deliver promptly to Purchaser and Seller notice of any
exercise by the Underwriter of its option to purchase any Option STRYPES,
stating the number of Option STRYPES as to which the Underwriter is then
exercising the option and the time and date of payment and delivery for such
Option STRYPES (any such time and date of delivery, a "Date of Delivery").  The
consideration to be paid by Purchaser in exchange for Seller's obligation
hereunder to deliver (or cause to be delivered) the Contract Consideration in
respect of any Option Subsidiary STRYPES (the "Option Consideration Amount")
shall be set forth in an Option STRYPES Pricing Agreement substantially in the
form of Exhibit B hereto.  The Option STRYPES Pricing Agreement may take the
form of an exchange of any standard form of written telecommunication between
Purchaser and Seller.  From and after the date of execution and delivery of any
Option STRYPES Pricing Agreement, this Agreement shall be deemed to incorporate
such Option STRYPES Pricing Agreement.  Upon the terms and subject to the
conditions of this Agreement, Purchaser shall deliver to Seller the Option
Consideration Amount on the related Date of Delivery at the offices of Brown &
Wood LLP, One World Trade Center, New York, New York 10048, or at such other
place as shall be agreed upon by Purchaser and Seller.

     (c) Payment of the Firm Consideration Amount and the Option Consideration
Amount  shall be made by Fedwire transfer of immediately available funds to an
account designated by Seller, or such other form of payment specified by Seller,
against delivery by Seller to the Agent of the number of shares of IMC Common
Stock necessary to comply with Seller's obligations under Section 5.1 hereof.

                                       3
<PAGE>
 
     2.3. Delivery Upon Maturity.  Consummation of the acquisition, sale and
          ----------------------                                            
delivery of the Contract Consideration shall take place on a date mutually
agreeable to Purchaser and Seller, not later than one (1) Trading Day prior to
the Maturity Date (the "Closing").  Delivery of the Contract Consideration shall
be made at the offices of MLMC, or at such other place as shall be agreed upon
by Purchaser and Seller.  Certificates representing Reference Securities in
registered form that are part of the Contract Consideration shall be registered
in Purchaser's name or in the name of a depositary or a nominee of a depositary
as requested by Purchaser, unless such Reference Securities are represented by
one or more global certificates registered in the name of a depositary or a
nominee of a depositary or are book entry securities, in which event Purchaser's
interest in such securities shall be noted in a manner satisfactory to Purchaser
and its counsel.  Other property that is a part of the Contract Consideration
delivered to Purchaser shall be transferable by Purchaser to the same extent as
when received by or on behalf of Seller and shall not be subjected, by reason of
or following receipt by Seller, to any transfer restrictions not generally
applicable to all holders of such other property.

     2.4. No Fractional Interests.  No fractional units or scrip representing
          -----------------------                                            
fractional units of any Reference Security shall be delivered at the Closing.
Instead of any fractional unit of any such Reference Security which would
otherwise be deliverable by Seller at the Closing, Seller shall make a cash
payment in respect of such fractional unit in an amount equal to the value of
such fractional unit based upon the average Closing Price per unit of such
Reference Security on the 20 Trading Days immediately prior to, but not
including, the second Trading Day preceding the Maturity Date.  To the extent
practicable, Seller will deliver fractional interests of any Reference Property
other than cash or a Reference Security at the Closing.  If such delivery is not
practicable, in lieu of any fractional interest of any Reference Property other
than cash or a Reference Security which would otherwise be deliverable at the
Closing, Seller shall make a cash payment in respect of such fractional interest
in an amount equal to the value of such fractional interest based on the fair
market value (as determined by a nationally recognized independent investment
banking firm retained for this purpose by ML & Co.) as of the third Trading Day
preceding the Maturity Date of such Reference Property other than cash or a
Reference Security.

     2.5. Cash Settlement.  (a)  Notwithstanding the provisions of Sections 2.1,
          ---------------                                                       
2.2, 2.3 and 2.4 hereof, Seller shall have the option, exercisable in its sole
discretion, to require that its obligation contained therein be settled, in
whole, through a cash payment at Closing in lieu of delivery of the Contract
Consideration.  The amount of such cash settlement payment shall be equal to the
value of the Subsidiary Maturity Consideration determined in accordance with the
second sentence of the third paragraph of the Subsidiary STRYPES, assuming (x)
(1) all of the STRYPES are held by the same Holder at such time and without
taking into account any default with respect to the STRYPES or any acceleration
of the maturity of the STRYPES resulting therefrom and (2) all of the Subsidiary
STRYPES are held by the same Holder at such time and without taking into account
any default with respect to the Subsidiary STRYPES or any acceleration of the
maturity of the Subsidiary STRYPES resulting therefrom and (y) that the fair
market value of any Reference Property consisting of rights or warrants
described in Section 303(b) of the Supplemental Indenture is the value
determined pursuant to such Section 303(b), and (z) that the Purchaser has not
elected to deliver cash in lieu of Reference Property (the "Maturity Value").
On or prior to the day seven Business Days preceding the Maturity Date,

                                       4
<PAGE>
 
Seller shall notify Purchaser whether it will exercise its option to require
cash settlement pursuant to this Section 2.5.

     (b) If the Contract Consideration consists of securities and/or other
property other than IMC Common Stock, Seller's right to deliver (or cause to be
delivered) to Purchaser hereunder such securities and/or other property shall be
conditioned upon such securities and/or other property so delivered (i) being
transferable by Purchaser to the same extent as when received by or on behalf of
Seller, and (ii) not being subjected, by reason of or following receipt by
Seller, to any transfer restrictions not generally applicable to all holders of
such securities and/or other property.  If the condition set forth in the
preceding sentence shall not be satisfied, then, notwithstanding the provisions
hereof, the parties' respective obligations contained in Sections 2.1, 2.2, 2.3
and 2.4 hereof shall be settled, in whole, through a cash payment at the Closing
in lieu of delivery of the Contract Consideration as provided in Section 2.5(a).

     2.6. Seller's Conditions to Closing.  Seller's obligation to consummate the
          ------------------------------                                        
transactions contemplated hereunder is conditioned upon (a) the purchase and
sale of the Initial STRYPES pursuant to the Underwriting Agreement having been
consummated as contemplated therein, (b) Seller having received, at or prior to
the date of Closing, subject to the provisions of Section 7.1 hereof, notice
from Purchaser specifying the Contract Consideration, (c) the representations
and warranties of Purchaser contained in paragraphs (iii) and (iv) of Article 4
hereof being true and correct as of the date of the Closing and (d) the Pledge
Agreement having been executed by the parties thereto and the delivery of the
Collateral thereunder having been made.

     2.7. Purchaser's Conditions to Closing.  Purchaser's obligation to
          ---------------------------------                            
consummate the transactions contemplated hereunder is conditioned upon (a) the
purchase and sale of the Initial STRYPES pursuant to the Underwriting Agreement
having been consummated as contemplated therein, (b) the representations and
warranties of Seller contained in paragraphs (i), (iii)(b), (iv), (v) and (vi)
of Article 3 hereof being true and correct as of the date of the Closing, (c)
the Pledge Agreement having been executed by the parties thereto and the
delivery of the Collateral thereunder having been made and (d) Purchaser having
received a legal opinion of Rosenberg & Liebentritt, P.C., dated the date of
Closing, as to certain bankruptcy matters, in form and substance satisfactory to
Purchaser.


                                       3.

                    Representations and Warranties of Seller
                    ----------------------------------------

     Seller represents and warrants to Purchaser as of the date hereof and as of
the date of Closing as follows:

          (i) Seller has been duly organized and is validly existing as a
corporation in good standing under the laws of the State of Delaware and has
corporate power and authority to enter into and perform its obligations under
this Agreement and the Pledge Agreement.  All of the issued common stock of
Seller is owned by Great American Management and Investment, Inc., a Delaware
corporation ("GAMI"), and such common stock is the only capital stock issued by
Seller.  Seller's certificate of incorporation limits its activities to (a)
acquiring, owning, financing, selling, pledging and otherwise dealing with
shares of IMC Common Stock (and any

                                       5
<PAGE>
 
successor to IMC Global) and any securities or other property distributed,
issued or received by way of dividend or otherwise as a result of or in
connection with the ownership of such shares of IMC Common Stock or the
securities or other property so distributed, issued or received and to engage in
all activities relating to the ownership of such shares, securities or other
property, including, without limitation, exercising any voting rights with
respect thereto; (b) making loans to affiliates of the corporation, receiving
payment under such loans and giving acquittances with respect to such loans for
so long as Seller is the holder of such loans and engaging in all activities
relating to the ownership of such loans; (c) investing and reinvesting any cash
at any time received by Seller; and (d) engaging in such lawful activities and
exercising such powers permitted by corporations under the laws of the State of
Delaware that are necessarily incident to or connected with the foregoing or
necessary or convenient to accomplish the foregoing and which are consistent
with the limitations set forth in Seller's certificate of incorporation.

          (ii) This Agreement and the Pledge Agreement have been duly
authorized, executed and delivered by Seller and (assuming the due
authorization, execution and delivery by the other parties thereto) constitute
valid and binding agreements of Seller, enforceable against Seller in accordance
with their respective terms, except as the enforcement hereof and thereof may be
limited by bankruptcy, insolvency (including, without limitation, all laws
relating to fraudulent transfers), reorganization, moratorium or similar laws
affecting enforcement of creditors' rights generally and except as enforcement
hereof and thereof is subject to general principles of equity (regardless of
whether enforcement is considered in a proceeding in equity or at law).

          (iii)  (a) At the date hereof, Seller is the sole registered owner of
and has all rights in and to at least 6,510,286 shares of IMC Common Stock, free
and clear of any security interest, mortgage, pledge, lien, encumbrance, claim
or equity, except for the security interest granted to certain banks pursuant to
that certain Credit Agreement, dated May 20, 1996, among GVI, as borrower, and
the banks named as parties therein, which security interest will be released on
the date of the Closing; and (b) to the extent Seller elects to deliver the
Contract Consideration at Closing, upon delivery of such Contract Consideration
against payment therefor pursuant to this Agreement, Purchaser will be the sole
owner of such Contract Consideration and, assuming Purchaser purchased for value
in good faith and without notice of any adverse claim, Purchaser will have
acquired all rights in and to such Contract Consideration, free and clear of any
security interest, mortgage, pledge, lien, encumbrance, claim or equity.

          (iv) No filing with, or authorization, approval, consent, license,
order, registration, qualification or decree of, any court or governmental
authority or agency is necessary or required for the execution, delivery or
performance by Seller of this Agreement or the Pledge Agreement or the
consummation by Seller of the transactions contemplated herein and therein,
except such as have been already obtained or as may be required under the 1933
Act or the rules and regulations promulgated thereunder or state securities
laws; and Seller has full right, power and authority to enter into this
Agreement and the Pledge Agreement and to sell, assign, transfer and deliver the
Contract Consideration pursuant to this Agreement.

          (v) The execution, delivery and performance by Seller of this
Agreement and the Pledge Agreement and the consummation by Seller of the
transactions contemplated herein and therein and compliance by Seller with its
obligations hereunder and thereunder do not and will not, whether with or
without the giving of notice or passage of time or both, conflict with or

                                       6
<PAGE>
 
constitute a breach of, or default under, or result in the creation or
imposition of any lien, charge or encumbrance upon any property or assets of
Seller pursuant to, any contract, indenture, mortgage, deed of trust, loan or
credit agreement, note, lease or any other agreement or instrument to which
Seller is a party or by which Seller is bound, or to which any of the property
or assets of Seller is subject (except for such conflicts, breaches or defaults
or liens, charges or encumbrances that would not, singly or in the aggregate,
materially and adversely affect the ability of Seller to perform its obligations
under this Agreement and the Pledge Agreement), nor will such action result in
any violation of the provisions of the charter or by-laws of Seller, or any
applicable law, statute, rule or regulation of any government or government
instrumentality having jurisdiction over Seller or any of its subsidiaries or
any of their assets, properties or operations (other than any state securities
or "blue sky" law, statute, rule or regulation, as to which no representation
and warranty is made), or any applicable judgment, order, writ or decree of any
government, government instrumentality or domestic court having jurisdiction
over Seller or any of its assets, properties or operations (except in all cases
for violations that would not, singly or in the aggregate, materially and
adversely affect the ability of Seller to perform its obligations under this
Agreement and the Pledge Agreement).

          (vi) Seller is not an "investment company," or a company "controlled"
by an "investment company," within the meaning of the Investment Company Act of
1940, as amended.


                                       4.

                  Representations and Warranties of Purchaser
                  -------------------------------------------

     Purchaser represents and warrants to Seller as of the date hereof and as of
the date of Closing as follows:

          (i) Purchaser has been duly organized and is validly existing as a
corporation in good standing under the laws of the State of Delaware and has
corporate power and authority to enter into and perform its obligations under
this Agreement and the Pledge Agreement.

          (ii) This Agreement and the Pledge Agreement have been duly
authorized, executed and delivered by Purchaser and (assuming the due
authorization, execution and delivery by the other parties thereto) constitute
valid and binding agreements of Purchaser, enforceable against Purchaser in
accordance with their respective terms, except as the enforcement hereof and
thereof may be limited by bankruptcy, insolvency (including, without limitation,
all laws relating to fraudulent transfers), reorganization, moratorium or
similar laws affecting enforcement of creditors' rights generally and except as
enforcement hereof and thereof is subject to general principles of equity
(regardless of whether enforcement is considered in a proceeding in equity or at
law).

                                       7
<PAGE>
 
          (iii)  No filing with, or authorization, approval, consent, license,
order, registration, qualification or decree of, any court or governmental
authority or agency is necessary or required for the execution, delivery or
performance by Purchaser of this Agreement or the Pledge Agreement or the
consummation by Purchaser of the transactions contemplated herein and therein,
except such as have been already obtained or as may be required under the 1933
Act or the rules and regulations promulgated thereunder or state securities
laws; and Purchaser has full right, power and authority to enter into this
Agreement and the Pledge Agreement and to purchase the Contract Consideration
pursuant to this Agreement and the Pledge Agreement.

          (iv) The execution, delivery and performance by Purchaser of this
Agreement and the Pledge Agreement and the consummation by Purchaser of the
transactions contemplated herein and therein and compliance by Purchaser with
its obligations hereunder and thereunder do not and will not, whether with or
without the giving of notice or passage of time or both, conflict with or
constitute a breach of, or default under, or result in the creation or
imposition of any lien, charge or encumbrance upon any property or assets of
Purchaser pursuant to, any contract, indenture, mortgage, deed of trust, loan or
credit agreement, note, lease or any other agreement or instrument to which
Purchaser is a party or by which Purchaser is bound, or to which any of the
property or assets of Purchaser is subject (except for such conflicts, breaches
or defaults or liens, charges or encumbrances that would not, singly or in the
aggregate, materially and adversely affect the ability of Purchaser to perform
its obligations under this Agreement and the Pledge Agreement), nor will such
action result in any violation of the provisions of the charter or by-laws of
Purchaser, or any applicable law, statute, rule, or regulation of any government
or government instrumentality having jurisdiction over Purchaser or any of its
subsidiaries or any of their assets, properties or operations (other than any
state securities or "blue sky" law, statute, rule or regulation, as to which no
representation and warranty is made), or any applicable judgment, order, writ or
decree of any government, government instrumentality or domestic court having
jurisdiction over Purchaser or any of its assets, properties or operations
(except in all cases for violations that would not, singly or in the aggregate,
materially and adversely affect the ability of Purchaser to perform its
obligations under this Agreement and the Pledge Agreement).


                                       5.

                                   Covenants
                                   ---------

     5.1.         Pledge.  (a) Seller shall cause to be held by the Agent during
                  ------                                                        
the term of this Agreement an aggregate number of shares of IMC Common Stock
and/or cash, securities and/or other property at least equal to the maximum
number or amount of each type of Reference Security and other property
constituting part of the Reference Property that would be required by Purchaser
to pay and discharge the Subsidiary STRYPES on the Maturity Date, assuming (x)
(1) all of the STRYPES are held by the same Holder at such time and without
taking into account any default with respect to the STRYPES or any acceleration
of the maturity of the STRYPES resulting therefrom and (2) all of the Subsidiary
STRYPES are held by the same Holder at such time and without taking into account
any default with respect to the Subsidiary STRYPES or any acceleration of the
maturity of the Subsidiary STRYPES resulting therefrom and (y) that the fair
market value of any Reference Property consisting of rights or warrants

                                       8
<PAGE>
 
described in Section 303(b) of the Supplemental Indenture is the value
determined pursuant to such Section 303(b), and (z) that the Purchaser has not
elected to deliver cash in lieu of Reference Property (the "Maximum Maturity
Consideration").

     (b)  Seller shall direct the Agent to sell (as provided in Section 2(c) of
the Pledge Agreement) any rights or warrants described in Section 303(b) of the
Supplemental Indenture at the net bid received by the Agent in accordance with
the procedures specified in Section 2(c) of the Pledge Agreement and to hold
during the term of this Agreement the proceeds from such sale.  If the Agent is
unable to consummate such sale, the rights or warrants shall be held by the
Agent, and neither Seller nor the Agent shall be required to take any action to
sell such rights or warrants other than as specified in such Section 2(c) of the
Pledge Agreement.

     5.2.  Affirmative Covenants.  During the term of this Agreement, Seller
           ---------------------                                            
covenants and agrees that it will:

     (a) Comply in all material respects with all applicable laws, rules,
regulations and orders, such compliance to include, without limitation, paying
before the same become delinquent all taxes, assessments and governmental
charges imposed upon it or upon its property, including the Collateral, except
to the extent contested in good faith.

     (b) Furnish to Purchaser as soon as possible and in any event within twenty
days after the president or any vice president of Seller shall become aware of
the occurrence of each failure by Seller to comply with or perform any agreement
or obligation contained in Sections 5.1, 5.2, 5.3 or 5.4 of this Agreement or
Sections 4, 7(a) or 7(b) of the Pledge Agreement continuing on the date of such
statement, a statement of the president or any vice president of Seller
describing such failure and setting forth details of such failure and the action
which the Seller has taken and proposes to take with respect thereto.

     (c) Preserve and maintain its corporate existence, rights (charter and
statutory), powers, franchises and qualifications, and limit its activities to
those specifically authorized in its certificate of incorporation.

     (d) At any reasonable time and from time to time, upon reasonable notice,
prior to the occurrence of a GVI Termination Event, and upon any notice after
the occurrence of a GVI Termination Event until delivery of the Collateral to
Seller to the extent required in accordance with Section 6.1(a) or (b), as
applicable, permit Purchaser or representatives thereof to examine and make
copies of and abstracts from the records and books of account of, and visit the
offices of, Seller, and to discuss the affairs, finances and accounts of Seller
with any of its officers or directors.

     (e) Keep proper books of record and account, in which full and correct
entries shall be made of all financial transactions and the assets and business
of Seller, including the Collateral, in accordance with appropriate accounting
principles consistently applied.

     5.3.  Negative Covenants.  During the term of this Agreement, Seller
           ------------------                                            
covenants and agrees that it will not:

                                       9
<PAGE>
 
     (a) Except for Permitted Activities and the transactions otherwise
contemplated by this Agreement and the Pledge Agreement, sell, assign, transfer,
exchange or otherwise dispose of, or grant any option with respect to, or
create, incur or suffer to exist any lien, security interest or other charge or
encumbrance, or any other type of preferential arrangement, upon or with respect
to any of its properties, including the Collateral, whether now owned or
hereafter acquired, or assign any right to receive income, in each case to
secure or to provide for the payment of any Debt of any Person.  "Permitted
Activities" shall mean activities of Seller directly related to:  (i) the
ownership of the Collateral, (ii) the receipt of the Firm Consideration Amount
and the Option Consideration Amount; (iii) the receipt pursuant to Section 5 of
the Pledge Agreement of distributions in respect of the Collateral; (iv) the
investment and reinvestment of amounts received pursuant to (ii) and (iii) above
or amounts received from any such investment or reinvestment (which may include
loans to Affiliates); (v) the dividend payment or other distribution of amounts
received pursuant to (ii), (iii) and (iv) or any of its properties other than
the Collateral; and (vi) the payment of its expenses related to the foregoing
and the conduct of its business in accordance with the provisions of its
certificate of incorporation.  "Debt" means, without duplication, (i)
indebtedness for borrowed money, (ii) obligations evidenced by bonds,
debentures, notes or other similar instruments, (iii) obligations to pay the
deferred purchase price of property or services, (iv) obligations as lessee
under leases which shall have been or should be, in accordance with generally
accepted accounting principles, recorded as capital leases, and (v) obligations
under direct or indirect guaranties in respect of, and obligations (contingent
or otherwise) to purchase or otherwise acquire, or otherwise to assure a
creditor against loss in respect of, indebtedness or obligations of others of
the kinds referred to in clauses (i) through (iv) above.  "Person" means an
individual, partnership, corporation (including a business trust), joint stock
company, trust, unincorporated association, joint venture or other entity, or a
government or any political subdivision or agency thereof.

     (b) Create or suffer to exist any Debt of Seller, other than the Debt
created under this Agreement and the Pledge Agreement.

     (c) Except for Permitted Activities and the transactions otherwise
contemplated by this Agreement and the Pledge Agreement, declare or make any
dividend payment or other distribution of assets, properties, cash, rights,
obligations or securities on account of any shares of any class of capital stock
of Seller, or purchase, redeem or otherwise acquire for value any shares of any
class of capital stock of Seller or any warrants, rights or options to acquire
any such shares, now or hereafter outstanding.

     (d) Except for the transactions contemplated by this Agreement and the
Pledge Agreement, merge or consolidate with or into, or convey, transfer, lease
or otherwise dispose of (whether in one transaction or in a series of
transactions) all or substantially all of its assets, including the Collateral
(whether now owned or hereafter acquired) to, or acquire all or substantially
all of the assets of, any Person.

     (e) Except for Permitted Activities and the transactions otherwise
contemplated by this Agreement and the Pledge Agreement, own any property, incur
any liabilities, make any investment or conduct any business other than the
ownership of the Collateral, this Agreement and the Pledge Agreement, and the
incurrence of the obligations pursuant to this Agreement and the Pledge
Agreement.

                                       10
<PAGE>
 
     5.4.  Separate Corporate Existence.  Seller acknowledges that Purchaser is
           ----------------------------                                        
entering into the transactions contemplated by this Agreement and the Pledge
Agreement in reliance upon the Seller's identity as a legal entity that is
separate from GAMI and its other Affiliates.  As used in this Agreement, unless
otherwise specifically provided, the term "Affiliate" means, as to any Person,
any other Person that, directly or indirectly, controls, is controlled by or is
under common control with such Person or is a partner in, or a director or
officer of, such Person.  The term "control" (including the terms "controlled
by" or "under the common control with") means the possession, direct or
indirect, of the power to vote ten percent or more of the securities having
ordinary voting power for the election of directors of such Person or to direct
or cause the direction of the management and policies of such Person, whether
through ownership of voting securities or by contract or otherwise.  Therefore,
from and after the date of execution and delivery of this Agreement, Seller
covenants and agrees to take all reasonable steps, including, without
limitation, all steps that Purchaser may from time to time reasonably request,
to maintain Seller's identity as a separate legal entity and to make it manifest
to third parties that Seller is an entity with assets and liabilities distinct
from those of GAMI and its other Affiliates and not just a division of GAMI.
Without limiting the generality of the foregoing and in addition to the other
covenants set forth herein, Seller covenants and agrees to:

     (a) conduct its own business in its own name and, to the extent Seller has
any full-time employees, require that all full-time employees of the Seller
identify themselves as such and not as employees of any Affiliate (including,
without limitation, by means of providing appropriate employees with business or
identification cards identifying such employees as Seller's employees);

     (b) compensate all employees, consultants and agents directly, from
Seller's bank accounts, for services provided to Seller by such employees,
consultants and agents, except to the extent that any employee, consultant or
agent of Seller is also an employee, consultant or agent of any Affiliate(s) and
the compensation of such employee, consultant or agent is allocated between
Seller and such Affiliate(s) on a basis which reflects the services rendered to
Seller and such Affiliate(s);

     (c) have separate stationery, invoices and checks in its own name;

     (d) conduct all transactions with each Affiliate strictly on an arm's-
length basis, allocate all overhead expenses (including, without limitation,
telephone and other utility charges) for items shared between Seller and such
Affiliate on the basis of actual use to the extent practicable and, to the
extent such allocation is not practicable, on a basis reasonably related to
actual use;

     (e) observe all corporate formalities as a distinct entity, and ensure that
all appropriate corporate actions are duly authorized by its Board of Directors;
without limiting the generality of the foregoing, Seller's Certificate of
Incorporation shall at all times provide that corporate action to file a
voluntary petition under the federal Bankruptcy Code or consent to the entry of
an order for relief in an involuntary case under the federal bankruptcy laws as
now or hereafter in effect may be authorized only by unanimous vote of its Board
of Directors;

                                       11
<PAGE>
 
     (f) maintain the Seller's books and records separate from those of each
Affiliate and otherwise readily identifiable as its own assets rather than
assets of any Affiliate;

     (g) prepare its financial statements separately from those of each
Affiliate and insure that any consolidated statements of any Affiliate that
include Seller have notes clearly indicating that Seller is a separate corporate
entity and that the Collateral will be available first and foremost to satisfy
the claims of Purchaser pursuant to this Agreement;

     (h) except as herein specifically otherwise provided, not commingle funds
or other assets, including the Collateral, of Seller with those of any Affiliate
and not maintain bank accounts or other depository accounts to which any
Affiliate is an account party, into which any Affiliate makes deposits or from
which any Affiliate has the power to make withdrawals;

     (i) not permit any Affiliate to pay any of the Seller's operating expenses
(except pursuant to allocation arrangements that comply with the requirements of
this Section 5.4);

     (j) except for the master or blanket policies covering Seller and any
Affiliate(s) or the property of Seller and such Affiliate(s), the costs of which
are allocated between Seller and such Affiliate(s) on a reasonable basis, not
permit Seller to be named as an insured on the insurance policy covering the
property of any Affiliate or enter into an agreement with the holder of such
policy whereby in the event of a loss in connection with such property, proceeds
are paid to Seller; and

     (k) have at least one member of its Board of Directors who is not (i) an
officer or employee of any Affiliate; (ii) a Person related to any officer or
employee of any Affiliate, (iii) a holder (directly or indirectly) of any
securities of any Affiliate, or (iv) a Person related to a holder (directly or
indirectly) of any voting securities of any Affiliate; provided that for
                                                       --------         
purposes of this clause (k), "Affiliate" shall mean any entity consolidated
under generally accepted accounting principles with Equity Holdings Limited, an
Illinois limited partnership ("EHL") and any trustee, officer, employee or
direct beneficiary of any of EHL's general partners.

     5.5.  Taxes.  Seller shall pay any and all documentary, stamp, transfer or
           -----                                                               
similar taxes and charges that may be payable in respect of the transfer and
delivery of the Contract Consideration pursuant hereto.

     5.6.  Amounts Due to Trustee.  ML & Co. shall pay any and all amounts due
           ----------------------                                             
to the Trustee under Section 607 of the Indenture.

     5.7.  Certain Notices.  (a)  ML & Co. shall notify Seller of any notice of
           ---------------                                                     
default with respect to the STRYPES received by ML & Co. from the Trustee or any
holders of STRYPES pursuant to the Indenture as promptly as reasonably
practicable after receipt thereof.

     (b) In case at any time while any of the STRYPES are outstanding Seller
receives written notice in its capacity as a holder of any Reference Security
that:

               (i) an issuer of a Reference Security shall declare a dividend
     (or any other distribution) on or in respect of such Reference Security to
     which Section 303(c) of the

                                       12
<PAGE>
 
     Supplemental Indenture shall apply (other than any cash dividends, if any,
     paid from time to time by the issuer of such Reference Security that do not
     constitute Extraordinary Cash Dividends);

               (ii) an issuer of a Reference Security shall authorize the
     issuance to all holders of such Reference Security of rights or warrants to
     subscribe for or purchase units of such Reference Security or of any other
     subscription rights or warrants;

               (iii)  there shall occur any conversion or reclassification of
     any Reference Security (other than a subdivision or combination of
     outstanding units of such Reference Security) or any consolidation, merger
     or reorganization to which an issuer of a Reference Security is a party and
     for which approval of any unitholders of such issuer is required, or the
     sale or transfer of all or substantially all of the assets of an issuer of
     a Reference Security; or

               (iv) there shall occur the voluntary or involuntary dissolution,
     liquidation, winding up or bankruptcy of an issuer of a Reference Security;

then Seller shall promptly notify Purchaser and ML & Co. of such fact and of (x)
the date, if known by Seller, on which a record is to be taken for the purpose
of such dividend, distribution or grant of rights or warrants, or, if a record
is not to be taken, the date as of which the holders of such Reference Security
of record to be entitled to such dividend, distribution or grant of rights or
warrants are to be determined, or (y) the date, if known by Seller, on which
such reclassification, consolidation, merger, sale, transfer, dissolution,
liquidation, winding up or bankruptcy is expected to become effective.

     5.8. No Supplemental Indentures Without Consent.  ML & Co. shall not,
          ------------------------------------------                      
without the consent of Seller, enter into any indenture supplemental to the
Indenture or otherwise modify or supplement the Supplemental Indenture which
would have an adverse effect on Seller.  ML & Co. and Purchaser shall not,
without the consent of Seller, amend the Subsidiary STRYPES in any respect that
would adversely affect any obligation of Seller hereunder, including, without
limitation, increasing the consideration that Seller is obligated to deliver at
Closing pursuant to this Agreement.  In the event that (i) any modification or
indenture supplemental to the Indenture or modification or supplement to the
Supplemental Indenture which would have an adverse effect on Seller is entered
into without Seller's consent or (ii) the Subsidiary STRYPES are amended in any
respect that would adversely affect any obligation of Seller hereunder without
Seller's consent, then, insofar as this Agreement is concerned and except to the
extent thereafter approved by Seller, this Agreement shall be interpreted and
performed as if such modification or indenture supplemental to the Indenture or
modification or supplement to the Supplemental Indenture or amendment of the
Subsidiary STRYPES had never existed and such modification or indenture
supplemental to the Indenture or modification or supplement to the Supplemental
Indenture or amendment of the Subsidiary STRYPES shall have no effect for
purposes of this Agreement.

     5.9. Limitations on Trading During Certain Days.  Each of Seller and ML &
          ------------------------------------------                          
Co. hereby agrees that it will not, and it will cause each of its Affiliates not
to, buy or sell shares

                                       13
<PAGE>
 
of any Reference Security for their own account during the 20 Trading Days
immediately prior to the second Trading Day preceding the Maturity Date.

     5.10.  Payment and Discharge of STRYPES.  Purchaser agrees that it shall
            --------------------------------                                 
pay and discharge its obligations under the Subsidiary STRYPES by delivering to
the holders of the Subsidiary STRYPES on the Maturity Date the form of
consideration that it receives from Seller hereunder.  ML & Co. agrees that it
shall pay and discharge its obligations under the STRYPES by delivering to the
holders of the STRYPES on the Maturity Date the form of consideration that it
receives from Purchaser under the Subsidiary STRYPES.

     5.11.  Further Assurances.  From time to time on and after the date hereof
            ------------------                                                 
through the date of Closing, each of the parties hereto shall use its reasonable
best efforts to take, or cause to be taken, all action and to do, or cause to be
done, all things necessary, proper and advisable to consummate and make
effective as promptly as practicable the transactions contemplated by this
Agreement in accordance with the terms and conditions hereof, including (i)
using reasonable best efforts to remove any legal impediment to the consummation
of such transactions and (ii) the execution and delivery of all such deeds,
agreements, assignments and further instruments of transfer and conveyance
necessary, proper or advisable to consummate and make effective the transactions
contemplated by this Agreement in accordance with the terms and conditions
hereof.


                                       6.

                            Acceleration of Delivery
                            ------------------------


     6.1.  Delivery.  (a) If a GVI Termination Event, within the meaning of the
           --------                                                            
Pledge Agreement, shall occur following the occurrence of a ML Termination
Event, within the meaning of the Pledge Agreement, or a GVI Termination Event
and a ML Termination Event shall occur simultaneously, then (i) Seller's rights
under Section 2.5 hereof shall terminate immediately, (ii) there shall become
immediately deliverable and payable by Seller to Purchaser (and immediately
deliverable by the Agent under the Pledge Agreement to Purchaser) the following:
(1) if the value of the Collateral (as defined in the Pledge Agreement)
(determined in the manner provided in Section 2.5 hereof for the Maturity Value)
is greater than the amount equal to $38.25 multiplied by the aggregate number of
STRYPES issued and Outstanding (the "Aggregate Issue Price"), then the greater
of (x) a percentage of the amount or number of each type of Reference Security
and other property then constituting Reference Property, allocated as
proportionately as practicable, so that the aggregate value thereof (determined
in the manner provided in Section 2.5 hereof for the Maturity Value) is equal to
the Aggregate Issue Price, and (y) 82.65% of the amount or number of each type
of Reference Security and other property then constituting Reference Property,
or (2) if the value of the Collateral is less than or equal to the Aggregate
Issue Price, then 100% of the Collateral, and (iii) the balance of the
Collateral remaining after the delivery and payment described in clause (ii)
above, if any, shall be retained by Seller (and shall become immediately
deliverable by the Agent under the Pledge Agreement to Seller).

                                       14
<PAGE>
 
     (b)  If a GVI Termination Event, within the meaning of the Pledge
Agreement, shall occur prior to the occurrence of a ML Termination Event, within
the meaning of the Pledge Agreement, then (i) Seller's rights under Section 2.5
hereof shall terminate immediately and (ii) all Collateral shall become
immediately deliverable and payable by Seller to Purchaser (and immediately
deliverable by the Agent under the Pledge Agreement to Purchaser).


                                       7.

                                 Miscellaneous
                                 -------------

     7.1. Adjustments to Reference Property; Selection of Independent Firm.  ML
          ----------------------------------------------------------------     
& Co. shall provide Seller with all notices given by ML & Co. pursuant to
Section 305 of the Supplemental Indenture.  ML & Co. shall provide Seller
reasonable opportunity to review the calculations pertaining to any adjustment
of the Reference Property or to any determination of the Maturity Consideration
or the value of the Maturity Consideration made pursuant to Article Three of the
Supplemental Indenture.  If the Seller disagrees with any such calculation or
determination or with the determination of the Subsidiary Maturity
Consideration, the Contract Consideration or the Maturity Value, Coopers &
Lybrand LLP or such other independent accounting or investment banking firm
agreed upon by Seller and ML & Co. shall be retained to make such calculation,
which shall be binding upon Purchaser, ML & Co. and Seller.  The fees and
expenses of such firm shall be borne by Seller if the independent firm agrees
with the calculation of ML & Co. and shall by borne by ML & Co. if the
independent firm agrees with the calculation of Seller.  If the independent firm
agrees with neither the calculation of ML & Co. or of Seller, its fees and
expenses shall be borne equally by ML & Co. and Seller.  If, pursuant to the
terms and conditions of the Supplemental Indenture and the STRYPES, ML & Co.
shall be required to retain a nationally recognized independent investment
banking firm for any purpose provided in the Supplemental Indenture or the
STRYPES, such nationally recognized independent investment banking firm shall be
selected and retained by ML & Co. only after giving Seller 30 days prior notice
(or such shorter notice as may be reasonably practicable) of the identity of
such firm and after consultation with Seller, and ML & Co. shall not select any
firm that is not reasonably acceptable to Seller.  In the event that ML & Co.
fails or refuses to timely make the calculations pertaining to any adjustment of
the Reference Property or to any determination of the Maturity Consideration or
the value of the Maturity Consideration pursuant to Article Three of the
Supplemental Indenture or to notify Seller of such calculations, then Seller may
retain Coopers & Lybrand LLP or a nationally recognized independent investment
banking firm to make such calculations, adjustments or determinations, which
shall be binding on Purchaser, ML & Co. and Seller and shall be used for the
purpose of determining the Contract Consideration under this Agreement or the
cash settlement payment pursuant to Section 2.5 of this Agreement.

     7.2. Notices.  Notices to Purchaser shall be directed to it at World
          -------                                                        
Financial Center, North Tower, 23rd Floor, New York, New York 10281-1323,
attention of Michael M. McGovern, Vice President and Secretary; notices to ML &
Co. shall be directed to it at 100 Church Street, 12th Floor, New York, New York
10007, attention of the Secretary, with a copy to the Treasurer at World
Financial Center, South Tower, New York, New York, 10080-6105; notices to Seller
shall be directed to it at Two North Riverside Plaza, Suite 1100, Chicago,

                                       15
<PAGE>
 
Illinois  60606, attention of General Counsel.  All notices and other
communications hereunder shall be in writing and shall be deemed to have been
duly given if either (i) personally delivered (including delivery by courier
service or by Federal Express or any other nationally recognized overnight
delivery service for next day delivery) to the offices specified in the
preceding sentence, in which case they shall be deemed received on the first
Business Day by which delivery shall have been made to said offices; or (ii)
sent by certified mail, return receipt requested, in accordance with the
preceding sentence, in which case they shall be deemed received when receipted
for unless acknowledgment is refused (in which case delivery shall be deemed to
have been received on the first Business Day on which such acknowledgment is
refused).

     7.3. Governing Law; Consent to Jurisdiction.  This Agreement shall be
          --------------------------------------                          
governed by and construed in accordance with the laws of the State of New York
applicable to agreements made and to be performed wholly within such State.  For
the purpose of any suit, action or proceeding arising out of or relating to this
Agreement, the parties hereto hereby expressly and irrevocably consent and
submit to the non-exclusive jurisdiction of any competent court in the place of
its domicile and any United States Federal court sitting in the Borough of
Manhattan, City and State of New York, and expressly and irrevocably waive, to
the extent permitted under applicable law, any immunity from the jurisdiction
thereof and any claim or defense in such suit, action or proceeding based on a
claim of improper venue, forum non conveniens or any similar basis to which it
might otherwise be entitled.

     7.4. WAIVER OF JURY TRIAL.  TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE
          ---------------------                                                
PARTIES HERETO HEREBY WAIVE AND COVENANT THAT THEY WILL NOT ASSERT (WHETHER AS
PLAINTIFF, DEFENDANT OR OTHERWISE) ANY RIGHT TO TRIAL BY JURY IN ANY FORUM IN
RESPECT OF ANY ISSUE, CLAIM, DEMAND, ACTION OR CAUSE OF ACTION ARISING OUT OF OR
BASED UPON THIS AGREEMENT OR THE SUBJECT MATTER HEREOF, IN EACH CASE WHETHER NOW
EXISTING OR HEREAFTER ARISING OR WHETHER IN CONTRACT OR TORT OR OTHERWISE.  EACH
PARTY HERETO ACKNOWLEDGES THAT IT HAS BEEN INFORMED BY THE OTHER PARTY HERETO
THAT THE PROVISIONS OF THIS SECTION CONSTITUTE A MATERIAL INDUCEMENT UPON WHICH
THE OTHER PARTY HERETO HAS RELIED, IS RELYING AND WILL RELY IN ENTERING INTO
THIS AGREEMENT AND ANY DOCUMENT RELATED THERETO.  EACH PARTY HERETO MAY FILE AN
ORIGINAL COUNTERPART OF THIS SECTION WITH ANY COURT AS WRITTEN EVIDENCE OF THE
CONSENT OF THE OTHER PARTY HERETO TO THE WAIVER OF ITS RIGHTS TO TRIAL BY JURY.

     7.5. Entire Agreement. Except as expressly set forth herein, this Agreement
          ----------------                                                      
and the Pledge Agreement constitute the entire agreement among the parties with
respect to the subject matter hereof and supersede all prior agreements,
understandings and negotiations, both written and oral, among the parties with
respect to the subject matter of this Agreement.

                                       16
<PAGE>
 
     7.6. Amendments; Waivers.  Any provision of this Agreement may be amended
          -------------------                                                 
or waived prior to the Closing if, and only if, such amendment or waiver is in
writing and signed, in the case of an amendment, by Purchaser, Seller and ML &
Co. or, in the case of a waiver, by the party against whom the waiver is to be
effective.  No failure or delay by either party in exercising any right, power
or privilege hereunder shall operate as a waiver thereof nor shall any single or
partial exercise thereof preclude any other or further exercise thereof or the
exercise of any other right, power or privilege.  The rights and remedies herein
provided shall be cumulative and not exclusive of any rights or remedies
provided by law.

     7.7. Successors, Assigns.  The provisions of this Agreement shall be
          -------------------                                            
binding upon and accrue to the benefit of  the parties hereto and their
respective heirs, successors and permitted assigns.  Notwithstanding the
foregoing, neither this Agreement nor any right, remedy, obligation or liability
arising hereunder or by reason hereof shall be assignable by any party hereto
without the prior written consent of the other parties hereto.

     7.8. No Third Party Rights.  This Agreement is not intended and shall not
          ---------------------                                               
be construed to create any rights in any person other than Seller, Purchaser and
ML & Co. and no person shall assert any rights as third party beneficiary
hereunder.

     7.9. Application of Bankruptcy Code.  The parties hereto acknowledge and
          ------------------------------                                     
agree that this Agreement is a "securities contract", as such term is defined in
section 741(7) of Title 11 of the United States Code (the "Bankruptcy Code"),
entitled to the protection of Section 555 of the Bankruptcy Code.

     7.10.  Counterparts.  This Agreement may be signed in any number of
            ------------                                                
counterparts, each of which shall be an original, with the same effect as if the
signatures thereto and hereto were upon the same instrument.

                                       17
<PAGE>
 
     IN WITNESS WHEREOF, the parties have signed this Agreement as of the date
and year first above written.

PURCHASER:                              SELLER:

MERRILL LYNCH MORTGAGE                  GVI HOLDINGS, INC.
 CAPITAL INC.


By: _________________________           By: _________________________
 Name:                                  Name:
 Title:                                 Title:


MERRILL LYNCH & CO., INC.



By___________________________
 Name:
 Title:

                                       18
<PAGE>
 
                                                                       Exhibit B


                       MERRILL LYNCH MORGAGE CAPITAL INC.
                            (a Delaware corporation)


                        Option STRYPES Pricing Agreement
                        --------------------------------


                                             ____________, 1996


GVI Holdings, Inc.
Two North Riverside Plaza
Suite 1100
Chicago, Illinois 60606

Ladies and Gentlemen:

  Reference is made to the Purchase Agreement, dated July 2, 1996 (the "Purchase
Agreement"), among Merrill Lynch & Co., Inc. ("ML&Co."), Merrill Lynch Mortgage
Capital Inc. ("Purchaser") and you ("Seller") relating to the future purchase by
Purchaser of the Contract Consideration from Seller.  The Underwriter has
exercised its option, pursuant to Section 2(b) of the Underwriting Agreement, to
purchase an aggregate of __________ Option STRYPES.  In connection with such
exercise, Purchaser has agreed to issue and sell to ML&Co. Option Subsidiary
STRYPES in an aggregate principal amount equal to $______________.  Payment for
and delivery of such Option Subsidiary STRYPES will be made at ______ on _____,
1996 (the "Date of Delivery").

  Pursuant to subsection (b) of Section 2.2 of the Purchase Agreement, Purchaser
and Seller hereby agree that the Option Consideration Amount to be delivered in
respect of the Option Subsidiary STRYPES on the Date of Delivery shall be
$______________.

  Capitalized terms used herein and not otherwise defined shall have the
meanings ascribed to them in the Purchase Agreement.
<PAGE>
 
   If the foregoing is in accordance with our agreement, please sign and return
to Purchaser a counterpart hereof, whereupon this instrument, along with all
counterparts, will become a binding agreement between Purchaser and Seller in
accordance with its terms.

                              Very truly yours,

                              MERRILL LYNCH MORTGAGE CAPITAL INC.



                              By: _____________________________
                                   Name:
                                   Title:

CONFIRMED AND ACCEPTED, as of
the date first above written:

GVI HOLDINGS, INC.



By: ____________________________
  Name:
  Title:

                                      A-2


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