Exhibit 99(d)


                       AMENDMENT NO. 2 TO RIGHTS AGREEMENT

                  AMENDMENT NO. 2, dated as of March 14, 1999 (this
"Amendment"), to the Rights Agreement, dated as of June 28, 1990, as amended by
an Amendment thereto dated December 12, 1995 (the "Rights Agreement"), between
BankBoston Corporation, a Massachu setts corporation (the "Company"), and
BankBoston, N.A., as successor rights agent (the "Rights
Agent").

                                   WITNESSETH

                  WHEREAS, the Company and the Rights Agent have previously 
entered into the Rights Agreement; and

                  WHEREAS, no Distribution Date (as defined in Section 3(a) of
the Rights Agreement) has occurred as of the date of this Amendment; and

                  WHEREAS, Section 27 of the Rights Agreement provides that the
Company may from time to time supplement or amend the Rights Agreement in
accordance with the terms of Section 27; and

                  WHEREAS, the Company and Fleet Financial Group, Inc., a Rhode
Island corporation ("Fleet"), have entered into an Agreement and Plan of Merger,
dated as of March 14, 1999 (the "Merger Agreement"), pursuant to which the
Company will merge (the "Merger") with and into Fleet; and

                  WHEREAS, in connection with the Merger Agreement, the Company
and Fleet have entered into a Stock Option Agreement, dated March 14, 1999 (the
"Option Agreement"), pursuant to which the Company has granted to Fleet an
option to purchase shares of the Company's Common Stock under certain
circumstances and upon certain terms and conditions; and

                  WHEREAS, the Board of Directors has determined that the
transactions contem plated by the Merger Agreement are in the best interests of
the Company and its stockholders; and

                  WHEREAS, the Board of Directors has determined that it is
advisable and in the best interest of the Company and its stockholders to amend
the Rights Agreement to exempt the Merger Agreement, the Option Agreement and
the transactions contemplated thereby (including, without limitation, the option
granted pursuant to the Option Agreement) from the application of the Rights
Agreement; and





                  WHEREAS, the Board of Directors of the Company has approved
and adopted this Amendment and directed that the proper officers take all
appropriate steps to execute and put into effect this Amendment.

                  NOW, THEREFORE, the Company hereby amends the Rights Agreement
as follows:

                  1. Section 1(a) of the Rights Agreement is hereby amended by
inserting the following sentence at the end thereof:

                  "Notwithstanding anything in this Agreement to the contrary,
                  until the termination of both the Fleet Merger Agreement and
                  the Fleet Stock Option Agreement (each as defined below) in
                  accordance with their respective terms, neither Fleet
                  Financial Group, Inc, a Rhode Island corporation ("Fleet"),
                  nor any Affiliate or Associate of Fleet (collectively with
                  Fleet, the "Fleet Parties") shall be deemed to be an Acquiring
                  Person by virtue of the fact that Fleet is the Beneficial
                  Owner solely of shares of Common Stock (i) of which any Fleet
                  Party is or becomes the Beneficial Owner by reason of the
                  approval, execution or delivery of the Agreement and Plan of
                  Merger, dated as of March 14, 1999, by and between the Company
                  and Fleet, as may be amended from time to time (the "Fleet
                  Merger Agreement"), or the Stock Option Agreement, dated March
                  14, 1999, between the Company, as issuer, and Fleet, as
                  grantee, as may be amended from time to time (the "Fleet Stock
                  Option Agreement"), or by reason of the consummation of any
                  transaction contemplated in the Fleet Merger Agreement, the
                  Fleet Stock Option Agreement or both, (ii) of which any Fleet
                  Party is the Beneficial Owner on the date hereof, (iii)
                  acquired in satisfaction of debts contracted prior to the
                  date hereof by any Fleet Party in good faith in the ordinary
                  course of such Fleet Party's banking business, (iv) held by
                  any Fleet Party in a BONA FIDE fiduciary or depository
                  capacity, or (v) owned in the ordinary course of business by
                  either (A) an investment company registered under the 
                  Investment Company Act of 1940, as amended, or (B) an 
                  investment account, in either case for which any Fleet Party 
                  acts as investment advisor."

                  2. Section 13 of the Rights Agreement is hereby amended to add
the following subsection (d) at the end thereof:


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                  "Notwithstanding any other provision of this Agreement, at the
                  Effective Time (as defined in the Fleet Merger Agreement), the
                  Common Stock will be converted into the consideration provided
                  for in the Fleet Merger Agreement, and all Rights attached
                  thereto shall simultaneously be extinguished with no
                  additional consideration being paid on account thereof."

                  3. Section 15 of the Rights Agreement is hereby amended to add
the following sentence at the end thereof:

                  "Nothing in this Agreement shall be construed to give any
                  holder of Rights or any other Person any legal or equitable
                  rights, remedies or claims under this Agree ment in connection
                  with any transactions contemplated by the Fleet Merger
                  Agreement or the Fleet Stock Option Agreement."

                  4. This Amendment shall be deemed to be in force and effective
immediately prior to the execution and delivery of the Merger Agreement. Except
as amended hereby, the Rights Agreement shall remain in full force and effect
and shall be otherwise unaffected hereby.

                  5. Capitalized terms used in this Amendment and not defined
herein shall have the meanings assigned thereto in the Rights Agreement.

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

                  7. In all respects not inconsistent with the terms and
provisions of this Amendment, the Rights Agreement is hereby ratified, adopted,
approved and confirmed. In executing and delivering this Amendment, the Rights
Agent shall be entitled to all the privileges and immunities afforded to the
Rights Agent under the terms and conditions of the Rights Agreement.


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                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed and attested as of the day and year first above
written.



ATTEST:                                 BANKBOSTON CORPORATION



By:/s/Janice B. Liva                    By:/s/Peter J. Manning
   --------------------                    -------------------
  Name:  Janice B. Liva                 Name: Peter J. Manning
  Title: Assistant General Counsel      Title:Executive Vice President,
         and Assistant Clerk                      Mergers and Acquisitions

ATTEST:                                 BANKBOSTON, N.A., as Rights Agent

                                        By Its Agent, Boston EquiServe Division
                                           of EquiServe Limited Partnership



By:/s/Darlene DioDato                   By: /s/Charles V. Rossi
   ------------------------------           -------------------------------
      Name:  Darlene DioDato                   Name:  Charles V. Rossi
      Title:    Managing Director              Title: President


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