Exhibit 4.25

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                               GUARANTEE AGREEMENT

                                 by and between

                            STATE STREET CORPORATION
                                  as Guarantor

                                       and

                          BANK ONE TRUST COMPANY, N.A.
        (as successor in interest to The First National Bank of Chicago)
                              as Guarantee Trustee

                                   relating to

                     STATE STREET CAPITAL TRUST [II/III/IV]

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

                         Dated as of _____________, 2000

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                                TABLE OF CONTENTS

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ARTICLE I

DEFINITIONS..................................................................1
         SECTION 1.1. Definitions............................................1

ARTICLE II

TRUST INDENTURE ACT..........................................................5
         SECTION 2.1. Trust Indenture Act; Application.......................5
         SECTION 2.2. List of Holders........................................5
         SECTION 2.3. Reports by the Guarantee Trustee.......................5
         SECTION 2.4. Periodic Reports to the Guarantee Trustee..............6
         SECTION 2.5. Evidence of Compliance with Conditions Precedent.......6
         SECTION 2.6. Events of Default; Waiver..............................6
         SECTION 2.7. Event of Default; Notice...............................6
         SECTION 2.8. Conflicting Interests..................................7


ARTICLE III

POWERS, DUTIES AND RIGHTS OF THE GUARANTEE TRUSTEE...........................7
         SECTION 3.1. Powers and Duties of the Guarantee Trustee.............7
         SECTION 3.2. Certain Rights of Guarantee Trustee....................9
         SECTION 3.3. Compensation; Indemnity; Fees.........................10

ARTICLE IV

GUARANTEE TRUSTEE...........................................................11
         SECTION 4.1. Guarantee Trustee; Eligibility........................11
         SECTION 4.2. Appointment, Removal and Resignation of the
                      Guarantee Trustee.....................................12

ARTICLE V

GUARANTEE...................................................................13
         SECTION 5.1. Guarantee.............................................13
         SECTION 5.2. Waiver of Notice and Demand...........................13
         SECTION 5.3. Obligations Not Affected..............................13
         SECTION 5.4. Rights of Holders.....................................14


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         SECTION 5.5. Guarantee of Payment..................................14
         SECTION 5.6. Subrogation...........................................14
         SECTION 5.7. Independent Obligations...............................15

ARTICLE VI

COVENANTS AND SUBORDINATION.................................................15
         SECTION 6.1. Subordination.........................................15
         SECTION 6.2. Pari Passu Guarantees.................................15

ARTICLE VII

TERMINATION.................................................................16
         SECTION 7.1. Termination...........................................16

ARTICLE VIII

MISCELLANEOUS...............................................................16
         SECTION 8.1. Successors and Assigns................................16
         SECTION 8.2. Amendments............................................16
         SECTION 8.3. Notices...............................................17
         SECTION 8.4. Benefit...............................................18
         SECTION 8.5. Governing Law.........................................18
         SECTION 8.6. Counterparts..........................................18


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      GUARANTEE AGREEMENT, dated as of _____________, 2000, between STATE STREET
CORPORATION, a Massachusetts corporation (the "Guarantor"), having its principal
office at 225 Franklin Street, Boston, Massachusetts 02110, and BANK ONE TRUST
COMPANY, N.A. (as successor in interest to The First National Bank of Chicago),
a national banking association, as trustee (the "Guarantee Trustee"), for the
benefit of the Holders (as defined herein) from time to time of the Capital
Securities (as defined herein) of STATE STREET CAPITAL TRUST [II/III/IV], a
Delaware statutory business trust (the "Issuer Trust").

                                    RECITALS

      WHEREAS, pursuant to an Amended and Restated Trust Agreement, of even date
herewith (the "Trust Agreement"), among State Street Corporation, as Depositor,
the Property Trustee, the Delaware Trustee, and the Administrative Trustees
(each as named therein) and the holders from time to time of undivided
beneficial interests in the assets of the Issuer Trust, the Issuer Trust is
issuing $[_____________] aggregate Liquidation Amount (as defined in the Trust
Agreement) of its Floating Rate Capital Securities, Series [A] (liquidation
amount $1,000 per capital security) (the "Capital Securities"), representing
preferred undivided beneficial interests in the assets of the Issuer Trust and
having the terms set forth in the Trust Agreement; and

      WHEREAS, the Capital Securities will be issued by the Issuer Trust, and
the proceeds thereof, together with the proceeds from the issuance of the Issuer
Trust's Common Securities (as defined herein), will be used to purchase the
Debentures (as defined in the Trust Agreement) of the Guarantor, which
Debentures will be deposited with Bank One Trust Company, N.A. (as successor in
interest to The First National Bank of Chicago), as Property Trustee under the
Trust Agreement, as trust assets; and

      WHEREAS, as an incentive for the Holders to purchase Capital Securities,
the Guarantor desires irrevocably and unconditionally to agree, to the extent
set forth herein, to pay to the Holders of the Capital Securities the Guarantee
Payments (as defined herein) and to make certain other payments on the terms and
conditions set forth herein.

      NOW, THEREFORE, in consideration of the purchase of Capital Securities by
each Holder, which purchase the Guarantor hereby acknowledges shall benefit the
Guarantor, the Guarantor executes and delivers this Guarantee Agreement for the
benefit of the Holders from time to time.

                                    ARTICLE I

                                   DEFINITIONS

      SECTION 1.1. Definitions.

            For all purposes of this Guarantee Agreement, except as otherwise
expressly provided or unless the context otherwise requires:


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      (a) The terms defined in this Article have the meanings assigned to them
in this Article, and include the plural as well as the singular;

      (b) All other terms used herein that are defined in the Trust Indenture
Act, either directly or by reference therein, have the meanings assigned to them
therein;

      (c) The words "include," "includes" and "including" shall be deemed to be
followed by the phrase "without limitation";

      (d) All accounting terms used but not defined herein have the meanings
assigned to them in accordance with United States generally accepted accounting
principles;

      (e) Unless the context otherwise requires, any reference to an "Article"
or a "Section" refers to an Article or a Section, as the case may be, of this
Guarantee Agreement; and

      (f) The words "hereby," "herein," "hereof" and "hereunder" and other words
of similar import refer to this Guarantee Agreement as a whole and not to any
particular Article, Section or other subdivision.

      "Affiliate" of any specified Person means any other Person directly or
indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For the purposes of this definition,
"control," when used with respect to any specified Person, means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

      "Board of Directors" means the board of directors of the Guarantor or the
Executive Committee of the board of directors of the Guarantor (or any other
committee of the board of directors of the Guarantor performing similar
functions) or a committee designated by the board of directors of the Guarantor
(or such committee), comprised of two or more members of the board of directors
of the Guarantor or officers of the Guarantor, or both.

      "Capital Securities" has the meaning specified in the recitals to this
Guarantee Agreement.

      "Common Securities" means the securities representing common undivided
beneficial interests in the assets of the Issuer Trust.

      "Event of Default" means (i) a default by the Guarantor in any of its
payment obligations under this Guarantee Agreement or (ii) a default by the
Guarantor in any other obligation hereunder that remains unremedied for 30 days.


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      "Guarantee Agreement" means this Guarantee Agreement, as modified, amended
or supplemented from time to time.

      "Guarantee Payments" means the following payments or distributions,
without duplication, with respect to the Capital Securities, to the extent not
paid or made by or on behalf of the Issuer Trust: (i) any accumulated and unpaid
Distributions (as defined in the Trust Agreement) required to be paid on the
Capital Securities, to the extent the Issuer Trust shall have funds on hand
available therefor at such time; (ii) the Redemption Price (as defined in the
Trust Agreement) with respect to any Capital Securities called for redemption by
the Issuer Trust, to the extent the Issuer Trust shall have funds on hand
available therefor at such time; and (iii) upon a voluntary or involuntary
dissolution, winding-up or liquidation of the Issuer Trust, unless Debentures
are distributed to the Holders, the lesser of (a) the Liquidation Distribution
(as defined in the Trust Agreement) with respect to the Capital Securities, to
the extent that the Issuer Trust shall have funds on hand available therefor at
such time, and (b) the amount of assets of the Issuer Trust remaining available
for distribution to Holders on liquidation of the Issuer.

      "Guarantee Trustee" means Bank One Trust Company, N.A. (as successor in
interest to The First National Bank of Chicago), solely in its capacity as
Guarantee Trustee and not in its individual capacity, until a Successor
Guarantee Trustee has been appointed and has accepted such appointment pursuant
to the terms of this Guarantee Agreement, and thereafter means each such
Successor Guarantee Trustee.

      "Guarantor" has the meaning specified in the first paragraph of this
Guarantee Agreement.

      "Holder" means any Holder (as defined in the Trust Agreement) of any
Capital Securities; provided, however, that in determining whether the holders
of the requisite percentage of Capital Securities have given any request,
notice, consent or waiver hereunder, "Holder" shall not include the Guarantor,
the Guarantee Trustee, or any Affiliate of the Guarantor or the Guarantee
Trustee.

      "Indenture" means the Junior Subordinated Indenture, dated as of December
15, 1996, between State Street Corporation and Bank One Trust Company, N.A. (as
successor in interest to The First National Bank of Chicago), as trustee, as the
same may be modified, amended or supplemented from time to time.

      "Issuer Trust" has the meaning specified in the first paragraph of this
Guarantee Agreement.

      "List of Holders" has the meaning specified in Section 2.2(a).

      "Majority in Liquidation Amount of the Capital Securities" means, except
as provided by the Trust Indenture Act, Capital Securities representing more
than 50% of the aggregate Liquidation Amount (as defined in the Trust Agreement)
of all Capital Securities then Outstanding (as defined in the Trust Agreement).


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      "Officers' Certificate" means, with respect to any Person, a certificate
signed by the Chairman or a Vice Chairman of the Board of Directors of such
Person or the President or a Vice President of such Person, and by the
Treasurer, an Assistant Treasurer, the Secretary or an Assistant Secretary of
such Person. Any Officers' Certificate delivered with respect to compliance with
a condition or covenant provided for in this Guarantee Agreement shall include:

      (a) a statement by each officer signing the Officers' Certificate that
such officer has read the covenant or condition and the definitions relating
thereto;

      (b) a brief statement of the nature and scope of the examination or
investigation undertaken by such officer in rendering the Officers' Certificate;

      (c) a statement that such officer has made such examination or
investigation as, in such officer's opinion, is necessary to enable such officer
to express an informed opinion as to whether or not such covenant or condition
has been complied with; and

      (d) a statement as to whether, in the opinion of such officer, such
condition or covenant has been complied with.

      "Person" means a legal person, including any individual, corporation,
estate, partnership, joint venture, association, joint stock company, company,
limited liability company, trust, business trust, unincorporated association, or
government or any agency or political subdivision thereof, or any other entity
of whatever nature.

      "Responsible Officer" means, with respect to the Guarantee Trustee, any
Senior Vice President, any Vice President, any Assistant Vice President, the
Secretary, any Assistant Secretary, the Treasurer, any Assistant Treasurer, any
Trust Officer or Assistant Trust Officer or any other officer of the Corporate
Trust Department of the Guarantee Trustee and also means, with respect to a
particular matter, any other officer to whom such matter is referred because of
that officer's knowledge of and familiarity with the particular subject.

      "Successor Guarantee Trustee" means a successor Guarantee Trustee
possessing the qualifications to act as Guarantee Trustee under Section 4.1.

      "Trust Agreement" means the Amended and Restated Trust Agreement of the
Issuer Trust referred to in the recitals to this Guarantee Agreement, as
modified, amended or supplemented from time to time.

      "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force at
the date as of which this Guarantee Agreement was executed; provided, however,
that in the event the Trust Indenture Act of 1939 is amended after such date,
"Trust Indenture Act" means, to the extent required by any such amendment, the
Trust Indenture Act of 1939 as so amended.


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      "Vice President," when used with respect to the Guarantor, means any duly
appointed vice president, whether or not designated by a number or a word or
words added before or after the title "vice president."

                                   ARTICLE II

                               TRUST INDENTURE ACT

      SECTION 2.1. Trust Indenture Act; Application.

      Except as otherwise expressly provided herein, the Trust Indenture Act
shall apply as a matter of contract to this Guarantee Agreement for purposes of
interpretation, construction and defining the rights and obligations hereunder,
and this Guarantee Agreement, the Guarantor and the Guarantee Trustee shall be
deemed for all purposes hereof to be subject to and governed by the Trust
Indenture Act to the same extent as would be the case if this Guarantee
Agreement were qualified under the Trust Indenture Act on the date hereof.
Except as otherwise expressly provided herein, if and to the extent that any
provision of this Guarantee Agreement limits, qualifies or conflicts with the
duties imposed by Sections 310 to 317, inclusive, of the Trust Indenture Act,
such imposed duties shall control.

      SECTION 2.2. List of Holders.

      (a) The Guarantor shall furnish or cause to be furnished to the Guarantee
Trustee (a) semiannually, on or before June 30 and December 31 of each year, a
list, in such form as the Guarantee Trustee may reasonably require, of the names
and addresses of the Holders (a "List of Holders") as of a date not more than 15
days prior to the delivery thereof, and (b) at such other times as the Guarantee
Trustee may request in writing, within 30 days after the receipt by the
Guarantor of any such request, a List of Holders as of a date not more than 15
days prior to the time such list is furnished, in each case to the extent such
information is in the possession or control of the Guarantor and has not
otherwise been received by the Guarantee Trustee in its capacity as such. The
Guarantee Trustee may destroy any List of Holders previously given to it on
receipt of a new List of Holders.

      (b) The Guarantee Trustee shall comply with the requirements of Section
311(a), Section 311(b) and Section 312(b) of the Trust Indenture Act.

      SECTION 2.3. Reports by the Guarantee Trustee.

      Within 60 days after May 15 of each year, commencing [May 15], 2001, the
Guarantee Trustee shall provide to the Holders such reports as are required by
Section 313 of the Trust Indenture Act, if any, in the form and in the manner
provided by Section 313 of the Trust Indenture Act. If this Guarantee Agreement
shall have been qualified under the Trust Indenture


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Act, the Guarantee Trustee shall also comply with the requirements of Section
313(d) of the Trust Indenture Act.

      SECTION 2.4. Periodic Reports to the Guarantee Trustee.

      The Guarantor shall provide to the Guarantee Trustee and the Holders such
documents, reports and information, if any, as required by Section 314 of the
Trust Indenture Act and the compliance certificate required by Section 314 of
the Trust Indenture Act, in the form, in the manner and at the times required by
Section 314 of the Trust Indenture Act, provided that such documents, reports
and information shall be required to be provided to the Securities and Exchange
Commission only if this Guarantee Agreement shall have been qualified under the
Trust Indenture Act.

      SECTION 2.5. Evidence of Compliance with Conditions Precedent.

      The Guarantor shall provide to the Guarantee Trustee such evidence of
compliance with such conditions precedent, if any, provided for in this
Guarantee Agreement that relate to any of the matters set forth in Section
314(c) of the Trust Indenture Act. Any certificate or opinion required to be
given by an officer of the Guarantor pursuant to Section 314(c)(1) may be given
in the form of an Officers' Certificate.

      SECTION 2.6. Events of Default; Waiver.

      The Holders of at least a Majority in Liquidation Amount of the Capital
Securities may, by vote, on behalf of the Holders of all the Capital Securities,
waive any past default or Event of Default and its consequences. Upon such
waiver, any such default or Event of Default shall cease to exist, and any
default or Event of Default arising therefrom shall be deemed to have been
cured, for every purpose of this Guarantee Agreement, but no such waiver shall
extend to any subsequent or other default or Event of Default or impair any
right consequent thereon.

      SECTION 2.7. Event of Default; Notice.

      (a) The Guarantee Trustee shall, within 90 days after the occurrence of an
Event of Default known to the Guarantee Trustee, transmit by mail, first class
postage prepaid, to the Holders, notice of any such Event of Default known to
the Guarantee Trustee, unless such Event of Default has been cured before the
giving of such notice, provided that, except in the case of a default in the
payment of a Guarantee Payment, the Guarantee Trustee shall be protected in
withholding such notice if and so long as the board of directors, the executive
committee or a trust committee of directors and/or Responsible Officers of the
Guarantee Trustee in good faith determines that the withholding of such notice
is in the interests of the Holders.


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      (b) The Guarantee Trustee shall not be deemed to have knowledge of any
Event of Default unless the Guarantee Trustee shall have received written
notice, or a Responsible Officer charged with the administration of this
Guarantee Agreement shall have obtained written notice, of such Event of
Default.

      SECTION 2.8. Conflicting Interests.

      The Trust Agreement and the Indenture shall be deemed to be specifically
described in this Guarantee Agreement for the purposes of clause (i) of the
first proviso contained in Section 310(b) of the Trust Indenture Act.

                                   ARTICLE III

               POWERS, DUTIES AND RIGHTS OF THE GUARANTEE TRUSTEE

      SECTION 3.1. Powers and Duties of the Guarantee Trustee.

      (a) This Guarantee Agreement shall be held by the Guarantee Trustee for
the benefit of the Holders, and the Guarantee Trustee shall not transfer this
Guarantee Agreement to any Person except to a Successor Guarantee Trustee on
acceptance by such Successor Guarantee Trustee of its appointment to act as
Guarantee Trustee hereunder. The right, title and interest of the Guarantee
Trustee, as such, hereunder shall automatically vest in any Successor Guarantee
Trustee, upon acceptance by such Successor Guarantee Trustee of its appointment
hereunder, and such vesting and cessation of title shall be effective whether or
not conveyancing documents have been executed and delivered pursuant to the
appointment of such Successor Guarantee Trustee.

      (b) If an Event of Default has occurred and is continuing, the Guarantee
Trustee shall enforce this Guarantee Agreement for the benefit of the Holders.

      (c) The Guarantee Trustee, before the occurrence of any Event of Default
and after the curing of all Events of Default that may have occurred, shall
undertake to perform only such duties as are specifically set forth in this
Guarantee Agreement (including pursuant to Section 2.1), and no implied
covenants shall be read into this Guarantee Agreement against the Guarantee
Trustee. If an Event of Default has occurred (that has not been cured or waived
pursuant to Section 2.6), the Guarantee Trustee shall exercise such of the
rights and powers vested in it by this Guarantee Agreement, and use the same
degree of care and skill in its exercise thereof, as a prudent person would
exercise or use under the circumstances in the conduct of his or her own
affairs.

      (d) No provision of this Guarantee Agreement shall be construed to relieve
the Guarantee Trustee from liability for its own negligent action, its own
negligent failure to act or its own wilful misconduct, except that:


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            (i) Prior to the occurrence of any Event of Default and after the
      curing or waiving of all such Events of Default that may have occurred:

                  (A) the duties and obligations of the Guarantee Trustee shall
            be determined solely by the express provisions of this Guarantee
            Agreement (including pursuant to Section 2.1), and the Guarantee
            Trustee shall not be liable except for the performance of such
            duties and obligations as are specifically set forth in this
            Guarantee Agreement (including pursuant to Section 2.1); and

                  (B) in the absence of bad faith on the part of the Guarantee
            Trustee, the Guarantee Trustee may conclusively rely, as to the
            truth of the statements and the correctness of the opinions
            expressed therein, upon any certificates or opinions furnished to
            the Guarantee Trustee and conforming to the requirements of this
            Guarantee Agreement; but in the case of any such certificates or
            opinions that by any provision hereof or of the Trust Indenture Act
            are specifically required to be furnished to the Guarantee Trustee,
            the Guarantee Trustee shall be under a duty to examine the same to
            determine whether or not they conform to the requirements of this
            Guarantee Agreement.

            (ii) The Guarantee Trustee shall not be liable for any error of
      judgment made in good faith by a Responsible Officer of the Guarantee
      Trustee, unless it shall be proved that the Guarantee Trustee was
      negligent in ascertaining the pertinent facts upon which such judgment was
      made.

            (iii) The Guarantee Trustee shall not be liable with respect to any
      action taken or omitted to be taken by it in good faith in accordance with
      the direction of the Holders of not less than a Majority in Liquidation
      Amount of the Capital Securities relating to the time, method and place of
      conducting any proceeding for any remedy available to the Guarantee
      Trustee, or exercising any trust or power conferred upon the Guarantee
      Trustee under this Guarantee Agreement.

            (iv) Subject to Section 3.1(b), no provision of this Guarantee
      Agreement shall require the Guarantee Trustee to expend or risk its own
      funds or otherwise incur personal financial liability in the performance
      of any of its duties or in the exercise of any of its rights or powers, if
      the Guarantee Trustee shall have reasonable grounds for believing that the
      repayment of such funds or liability is not reasonably assured to it under
      the terms of this Guarantee Agreement or adequate indemnity against such
      risk or liability is not reasonably assured to it.


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      SECTION 3.2. Certain Rights of Guarantee Trustee.

      (a) Subject to the provisions of Section 3.1:

            (i) The Guarantee Trustee may rely and shall be fully protected in
      acting or refraining from acting upon any resolution, certificate,
      statement, instrument, opinion, report, notice, request, direction,
      consent, order, bond, debenture, note, other evidence of indebtedness or
      other paper or document reasonably believed by it to be genuine and to
      have been signed, sent or presented by the proper party or parties.

            (ii) Any direction or act of the Guarantor contemplated by this
      Guarantee Agreement shall be sufficiently evidenced by an Officers'
      Certificate unless otherwise prescribed herein.

            (iii) Whenever, in the administration of this Guarantee Agreement,
      the Guarantee Trustee shall deem it desirable that a matter be proved or
      established before taking, suffering or omitting to take any action
      hereunder, the Guarantee Trustee (unless other evidence is herein
      specifically prescribed) may, in the absence of bad faith on its part,
      request and rely upon an Officers' Certificate which, upon receipt of such
      request from the Guarantee Trustee, shall be promptly delivered by the
      Guarantor.

            (iv) The Guarantee Trustee may consult with legal counsel, and the
      written advice or opinion of such legal counsel with respect to legal
      matters shall be full and complete authorization and protection in respect
      of any action taken, suffered or omitted to be taken by it hereunder in
      good faith and in accordance with such advice or opinion. Such legal
      counsel may be legal counsel to the Guarantor or any of its Affiliates and
      may be one of its employees. The Guarantee Trustee shall have the right at
      any time to seek instructions concerning the administration of this
      Guarantee Agreement from any court of competent jurisdiction.

            (v) The Guarantee Trustee shall be under no obligation to exercise
      any of the rights or powers vested in it by this Guarantee Agreement at
      the request or direction of any Holder unless such Holder shall have
      provided to the Guarantee Trustee such adequate security and indemnity as
      would satisfy a reasonable person in the position of the Guarantee Trustee
      against the costs, expenses (including attorneys' fees and expenses) and
      liabilities that might be incurred by it in complying with such request or
      direction, including such reasonable advances as may be requested by the
      Guarantee Trustee; provided that nothing contained in this Section
      3.2(a)(v) shall be taken to relieve the Guarantee Trustee, upon the
      occurrence of an Event of Default, of its obligation to exercise the
      rights and powers vested in it by this Guarantee Agreement.


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            (vi) The Guarantee Trustee shall not be bound to make any
      investigation into the facts or matters stated in any resolution,
      certificate, statement, instrument, opinion, report, notice, request,
      direction, consent, order, bond, debenture, note, other evidence of
      indebtedness or other paper or document, but the Guarantee Trustee, in its
      discretion, may make such further inquiry or investigation into such facts
      or matters as it may see fit.

            (vii) The Guarantee Trustee may execute any of the trusts or powers
      hereunder or perform any duties hereunder either directly or by or through
      its agents or attorneys, and the Guarantee Trustee shall not be
      responsible for any misconduct or negligence on the part of any such agent
      or attorney appointed by it with due care hereunder.

            (viii) Whenever in the administration of this Guarantee Agreement
      the Guarantee Trustee shall deem it desirable to receive instructions with
      respect to enforcing any remedy or right or taking any other action
      hereunder, the Guarantee Trustee (A) may request instructions from the
      Holders, (B) may refrain from enforcing such remedy or right or taking
      such other action until such instructions are received, and (C) shall be
      protected in acting in accordance with such instructions.

      (b) No provision of this Guarantee Agreement shall be deemed to impose any
duty or obligation on the Guarantee Trustee to perform any act or acts or
exercise any right, power, duty or obligation conferred or imposed on it in any
jurisdiction in which it shall be illegal, or in which the Guarantee Trustee
shall be unqualified or incompetent in accordance with applicable law, to
perform any such act or acts or to exercise any such right, power, duty or
obligation. No permissive power or authority available to the Guarantee Trustee
shall be construed to be a duty to act in accordance with such power and
authority.

      SECTION 3.3. Compensation; Indemnity; Fees.

      The Guarantor agrees:

            (a) to pay to the Guarantee Trustee from time to time such
      reasonable compensation for all services rendered by it hereunder as may
      be agreed by the Guarantor and the Guarantee Trustee from time to time
      (which compensation shall not be limited by any provision of law in regard
      to the compensation of a trustee of an express trust);

            (b) except as otherwise expressly provided herein, to reimburse the
      Guarantee Trustee upon request for all reasonable expenses, disbursements
      and advances incurred or made by the Guarantee Trustee in accordance with
      any provision of this Guarantee Agreement (including the reasonable
      compensation and the expenses and disbursements of its agents and
      counsel), except any such expense, disbursement or advance as may be
      attributable to its negligence or bad faith; and


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            (c) to indemnify the Guarantee Trustee for, and to hold it harmless
      against, any loss, liability or expense incurred without negligence,
      wilful misconduct or bad faith on the part of the Guarantee Trustee,
      arising out of or in connection with the acceptance or administration of
      this Guarantee Agreement, including the costs and expenses of defending
      itself against any claim or liability in connection with the exercise or
      performance of any of its powers or duties hereunder.

The Guarantee Trustee will not claim or exact any lien or charge on any
Guarantee Payments as a result of any amount due to it under this Guarantee
Agreement.

The provisions of this Section 3.3 shall survive the termination of this
Guarantee Agreement or the resignation or removal of the Guarantee Trustee.

                                   ARTICLE IV

                                GUARANTEE TRUSTEE

      SECTION 4.1. Guarantee Trustee; Eligibility.

      (a) There shall at all times be a Guarantee Trustee which shall:

            (i) not be an Affiliate of the Guarantor; and

            (ii) be a Person that is eligible pursuant to the Trust Indenture
      Act to act as such and has a combined capital and surplus of at least
      $50,000,000, and shall be a corporation meeting the requirements of
      Section 310(a) of the Trust Indenture Act. If such corporation publishes
      reports of condition at least annually, pursuant to law or to the
      requirements of its supervising or examining authority, then, for the
      purposes of this Section 4.1 and to the extent permitted by the Trust
      Indenture Act, the combined capital and surplus of such corporation shall
      be deemed to be its combined capital and surplus as set forth in its most
      recent report of condition so published.

      (b) If at any time the Guarantee Trustee shall cease to be eligible to so
act under Section 4.1(a), the Guarantee Trustee shall immediately resign in the
manner and with the effect set out in Section 4.2.

      (c) If the Guarantee Trustee has or shall acquire any "conflicting
interest" within the meaning of Section 310(b) of the Trust Indenture Act, the
Guarantee Trustee and Guarantor shall in all respects comply with the provisions
of Section 310(b) of the Trust Indenture Act.


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      SECTION 4.2. Appointment, Removal and Resignation of the Guarantee
Trustee.

      (a) Subject to Section 4.2(c), the Guarantee Trustee may be appointed or
removed at any time by the action of the Holders of a Majority in Liquidation
Amount of the Capital Securities delivered to the Guarantee Trustee and the
Guarantor (i) for cause or (ii) if a Debenture Event of Default (as defined in
the Trust Agreement) shall have occurred and be continuing at any time.

      (b) Subject to Section 4.2(c), the Guarantee Trustee may resign from
office (without need for prior or subsequent accounting) by giving written
notice thereof to the Holders and the Guarantor and by appointing a successor
Guarantee Trustee. The Guarantee Trustee shall appoint a successor by requesting
from at least three Persons meeting the requirements of Section 4.1(a) their
expenses and charges to serve as the Guarantee Trustee, and selecting the Person
who agrees to the lowest expenses and charges.

      (c) The Guarantee Trustee appointed hereunder shall hold office until a
Successor Guarantee Trustee shall have been appointed and shall have accepted
such appointment. No removal or resignation of a Guarantee Trustee shall be
effective until a Successor Guarantee Trustee has been appointed and has
accepted such appointment by written instrument executed by such Successor
Guarantee Trustee and delivered to the Guarantor and, in the case of any
resignation, the resigning Guarantee Trustee.

      (d) If no Successor Guarantee Trustee shall have been appointed and
accepted appointment as provided in this Section 4.2 within 60 days after
delivery to the Holders and the Guarantor of a notice of resignation, the
resigning Guarantee Trustee may petition, at the expense of the Guarantor, any
court of competent jurisdiction for appointment of a Successor Guarantee
Trustee. Such court may thereupon, after prescribing such notice, if any, as it
may deem proper, appoint a Successor Guarantee Trustee.

      (e) If a resigning Guarantee Trustee shall fail to appoint a successor, or
if a Guarantee Trustee shall be removed or become incapable of acting as
Guarantee Trustee and a replacement shall not be appointed prior to such
resignation or removal, or if a vacancy shall occur in the office of Guarantee
Trustee for any cause, the Holders of the Capital Securities, by the action of
the Holders of record of not less than 25% in aggregate Liquidation Amount (as
defined in the Trust Agreement) of the Capital Securities then Outstanding (as
defined in the Trust Agreement) delivered to such Guarantee Trustee, may appoint
a Successor Guarantee Trustee or Trustees. If no successor Guarantee Trustee
shall have been so appointed by the Holders of the Capital Securities and
accepted appointment, any Holder, on behalf of such Holder and all others
similarly situated, or any other Guarantee Trustee, may petition any court of
competent jurisdiction for the appointment of a successor Guarantee Trustee.


                                      -12-
<PAGE>

                                    ARTICLE V

                                    GUARANTEE

      SECTION 5.1. Guarantee.

      The Guarantor irrevocably and unconditionally agrees to pay in full to the
Holders the Guarantee Payments (without duplication of amounts theretofore paid
by or on behalf of the Issuer Trust), as and when due, regardless of any
defense, right of set-off or counterclaim that the Issuer Trust may have or
assert, except the defense of payment. The Guarantor's obligation to make a
Guarantee Payment may be satisfied by direct payment of the required amounts by
the Guarantor to the Holders or by causing the Issuer Trust to pay such amounts
to the Holders.

      SECTION 5.2. Waiver of Notice and Demand.

      The Guarantor hereby waives notice of acceptance of this Guarantee
Agreement and of any liability to which it applies or may apply, presentment,
demand for payment, any right to require a proceeding first against the
Guarantee Trustee, the Issuer Trust or any other Person before proceeding
against the Guarantor, protest, notice of nonpayment, notice of dishonor, notice
of redemption and all other notices and demands.

      SECTION 5.3. Obligations Not Affected.

      The obligations, covenants, agreements and duties of the Guarantor under
this Guarantee Agreement shall in no way be affected or impaired by reason of
the happening from time to time of any of the following:

            (a) the release or waiver, by operation of law or otherwise, of the
      performance or observance by the Issuer Trust of any express or implied
      agreement, covenant, term or condition relating to the Capital Securities
      to be performed or observed by the Issuer Trust;

            (b) the extension of time for the payment by the Issuer Trust of all
      or any portion of the Distributions (other than an extension of time for
      payment of Distributions that results from the extension of any interest
      payment period on the Debentures as provided in the Indenture), Redemption
      Price, Liquidation Distribution or any other sums payable under the terms
      of the Capital Securities or the extension of time for the performance of
      any other obligation under, arising out of, or in connection with, the
      Capital Securities;

            (c) any failure, omission, delay or lack of diligence on the part of
      the Holders to enforce, assert or exercise any right, privilege, power or
      remedy conferred on the Holders pursuant to the terms of the Capital
      Securities, or any action on the part of the Issuer Trust granting
      indulgence or extension of any kind;


                                      -13-
<PAGE>

            (d) the voluntary or involuntary liquidation, dissolution,
      receivership, insolvency, bankruptcy, assignment for the benefit of
      creditors, reorganization, arrangement, composition or readjustment of
      debt of, or other similar proceedings affecting, the Issuer Trust or any
      of the assets of the Issuer Trust;

            (e) any invalidity of, or defect or deficiency in, the Capital
      Securities;

            (f) the settlement or compromise of any obligation guaranteed hereby
      or hereby incurred; or

            (g) any other circumstance whatsoever that might otherwise
      constitute a legal or equitable discharge or defense of a guarantor (other
      than payment of the underlying obligation), it being the intent of this
      Section 5.3 that the obligations of the Guarantor hereunder shall be
      absolute and unconditional under any and all circumstances.

There shall be no obligation of the Holders to give notice to, or obtain the
consent of, the Guarantor with respect to the happening of any of the foregoing.

      SECTION 5.4. Rights of Holders.

      The Guarantor expressly acknowledges that: (i) this Guarantee Agreement
will be deposited with the Guarantee Trustee to be held for the benefit of the
Holders; (ii) the Guarantee Trustee has the right to enforce this Guarantee
Agreement on behalf of the Holders; (iii) the Holders of a Majority in
Liquidation Amount of the Capital Securities have the right to direct the time,
method and place of conducting any proceeding for any remedy available to the
Guarantee Trustee in respect of this Guarantee Agreement or exercising any trust
or power conferred upon the Guarantee Trustee under this Guarantee Agreement;
and (iv) any Holder may institute a legal proceeding directly against the
Guarantor to enforce its rights under this Guarantee Agreement without first
instituting a legal proceeding against the Guarantee Trustee, the Issuer Trust
or any other Person.

      SECTION 5.5. Guarantee of Payment.

      This Guarantee Agreement creates a guarantee of payment and not of
collection. This Guarantee Agreement will not be discharged except by payment of
the Guarantee Payments in full (without duplication of amounts theretofore paid
by the Issuer Trust) or upon the distribution of Debentures to Holders as
provided in the Trust Agreement.

      SECTION 5.6. Subrogation.

      The Guarantor shall be subrogated to all rights (if any) of the Holders
against the Issuer Trust in respect of any amounts paid to the Holders by the
Guarantor under this Guarantee


                                      -14-
<PAGE>

Agreement; provided, however, that the Guarantor shall not (except to the extent
required by mandatory provisions of law) be entitled to enforce or exercise any
rights which it may acquire by way of subrogation or any indemnity,
reimbursement or other agreement, in all cases as a result of payment under this
Guarantee Agreement, if, at the time of any such payment, any amounts are due
and unpaid under this Guarantee Agreement. If any amount shall be paid to the
Guarantor in violation of the preceding sentence, the Guarantor agrees to hold
such amount in trust for the Holders and to pay over such amount to the Holders.

      SECTION 5.7. Independent Obligations.

      The Guarantor acknowledges that its obligations hereunder are independent
of the obligations of the Issuer Trust with respect to the Capital Securities
and that the Guarantor shall be liable as principal and as debtor hereunder to
make Guarantee Payments pursuant to the terms of this Guarantee Agreement
notwithstanding the occurrence of any event referred to in subsections (a)
through (g), inclusive, of Section 5.3 hereof.

                                   ARTICLE VI

                           COVENANTS AND SUBORDINATION

      SECTION 6.1. Subordination.

      The obligations of the Guarantor under this Guarantee Agreement will
constitute unsecured obligations of the Guarantor and will rank subordinate and
junior in right of payment to all Senior Indebtedness (as defined in the
Indenture) of the Guarantor to the extent and in the manner set forth in the
Indenture with respect to the Debentures, and the provisions of Article XIII of
the Indenture will apply, mutatis mutandis, to the obligations of the Guarantor
hereunder. The obligations of the Guarantor hereunder do not constitute Senior
Indebtedness (as defined in the Indenture) of the Guarantor.

      SECTION 6.2. Pari Passu Guarantees.

      The obligations of the Guarantor under this Guarantee Agreement shall rank
pari passu with the obligations of the Guarantor under (i) any similar guarantee
agreements issued by the Guarantor on behalf of the holders of preferred or
capital securities issued by any Issuer Trust (as defined in the Indenture),
(ii) the Indenture and the Securities (as defined therein) issued thereunder;
(iii) the [Expense Agreement] (as defined in the Trust Agreement) and any
similar expense agreements entered into by the Guarantor in connection with the
offering of Capital Securities (as defined in the Indenture) by any Issuer Trust
(as defined in the Indenture), and (iv) any other security, guarantee or other
agreement or obligation that is expressly stated to rank pari passu with the
obligations of the Guarantor under this Guarantee Agreement or with any


                                      -15-
<PAGE>

obligation that ranks pari passu with the obligations of the Guarantor under
this Guarantee Agreement.

                                   ARTICLE VII

                                   TERMINATION

      SECTION 7.1. Termination.

      This Guarantee Agreement shall terminate and be of no further force and
effect upon (i) full payment of the Redemption Price (as defined in the Trust
Agreement) of all Capital Securities, (ii) the distribution of Debentures to the
Holders in exchange for all of the Capital Securities or (iii) full payment of
the amounts payable in accordance with Article IX of the Trust Agreement upon
liquidation of the Issuer Trust. Notwithstanding the foregoing, this Guarantee
Agreement will continue to be effective or will be reinstated, as the case may
be, if at any time any Holder is required to repay any sums paid with respect to
Capital Securities or this Guarantee Agreement.

                                  ARTICLE VIII

                                  MISCELLANEOUS

      SECTION 8.1. Successors and Assigns.

      All guarantees and agreements contained in this Guarantee Agreement shall
bind the successors, assigns, receivers, trustees and representatives of the
Guarantor and shall inure to the benefit of the Holders of the Capital
Securities then outstanding. Except in connection with a consolidation, merger
or sale involving the Guarantor that is permitted under Article VIII of the
Indenture and pursuant to which the successor or assignee agrees in writing to
perform the Guarantor's obligations hereunder, the Guarantor shall not assign
its obligations hereunder, and any purported assignment other than in accordance
with this provision shall be void.

      SECTION 8.2. Amendments.

      Except with respect to any changes that do not adversely affect the rights
of the Holders in any material respect (in which case no consent of the Holders
will be required), this Guarantee Agreement may only be amended with the prior
approval of the Holders of not less than a Majority in Liquidation Amount of the
Capital Securities. The provisions of Article VI of the Trust Agreement
concerning meetings of the Holders shall apply to the giving of such approval.


                                      -16-
<PAGE>

      SECTION 8.3. Notices.

      Any notice, request or other communication required or permitted to be
given hereunder shall be in writing, duly signed by the party giving such
notice, and delivered, telecopied or mailed by first class mail as follows:

      (a) if given to the Guarantor, to the address or telecopy number set forth
below or such other address or telecopy number as the Guarantor may give notice
to the Guarantee Trustee and the Holders:

                  State Street Corporation
                  225 Franklin Street
                  Boston, Massachusetts 02110
                  Attention: Secretary
                  Telecopy: 617-664-4006

      (b) if given to the Guarantee Trustee, at the Issuer Trust's address or
telecopy number set forth below or such other address or telecopy number as the
Guarantee Trustee may give notice to the Guarantor and Holders:

                  Bank One Trust Company, N.A.
                  One North State Street, 9th Floor
                  Chicago, Illinois  60602
                  Attention: Corporate Trust Administration
                  Telecopy: 212-373-1383

         with a copy to:

                  State Street Capital Trust [II/III/IV]
                  c/o State Street Bank and Trust Company, N.A.
                  61 Broadway, 15th Floor
                  New York, New York  10006

      (c) if given to any Holder, at the address set forth on the books and
records of the Issuer Trust.

      All notices hereunder shall be deemed to have been given when received in
person, telecopied with receipt confirmed, or mailed by first class mail,
postage prepaid, except that if a notice or other document is refused delivery
or cannot be delivered because of a changed address of which no notice was
given, such notice or other document shall be deemed to have been delivered on
the date of such refusal or inability to deliver.


                                      -17-
<PAGE>

      SECTION 8.4. Benefit.

      This Guarantee Agreement is solely for the benefit of the Holders and is
not separately transferable from the Capital Securities.

      SECTION 8.5. Governing Law.

      THIS GUARANTEE AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE
WITH THE LAWS OF THE STATE OF NEW YORK.

      SECTION 8.6. Counterparts.

      This instrument may be executed in any number of counterparts, each of
which so executed shall be deemed to be an original, but all such counterparts
shall together constitute but one and the same instrument.


                                      -18-
<PAGE>

      IN WITNESS WHEREOF, the parties hereto have executed this Guarantee
Agreement as of the day and year first above written.

                                          STATE STREET CORPORATION,
                                          as Guarantor

                                          By:
                                             ---------------------------------
                                             Name:
                                             Title:


                                          BANK ONE TRUST COMPANY, N.A.
                                          (as successor in interest to
                                           The First National Bank of Chicago)
                                          as Guarantee Trustee

                                          By:
                                             ---------------------------------
                                             Name:
                                             Title: