PIONEER INTEREST SHARES
DEF 14A, 2000-07-27
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                                  SCHEDULE 14A

                   Proxy Statement Pursuant to Section 14(a)
                     of the Securities Exchange Act of 1934


Filed by the Registrant                    [X]

Filed by a Party other than the Registrant [ ]


Check the appropriate box:

[ ]  Preliminary Proxy Statement

[ ]  Confidential, for Use of the Commission Only (as permitted
     by Rule 14a-6(e)(2))

[X]  Definitive Proxy Statement

[X]  Definitive Additional Materials

[ ]  Soliciting Material Pursuant to ss.240.14a-12

                             Pioneer Interest Shares
                  (Name of Registrant as Specified in its Charter)



    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)


Payment of Filing Fee (Check the appropriate box):

[X] No fee required
<PAGE>


                             PIONEER INTEREST SHARES
                                 60 State Street
                           Boston, Massachusetts 02109
                                 1-800-225-6292


                    NOTICE OF ANNUAL MEETING OF SHAREHOLDERS


                        SCHEDULED FOR SEPTEMBER 11, 2000

     This is the formal agenda for your fund's annual shareholder meeting. It
tells you the matters you will be asked to vote on and the time and place of
the meeting, in case you want to attend in person.

To the shareholders of Pioneer Interest Shares:

     The annual meeting of shareholders of your fund will be held at the
offices of Hale and Dorr LLP, 60 State Street, 26th Floor, Boston,
Massachusetts on September 11, 2000 at 2:00 p.m., Boston time, to consider the
following:

    1.    A proposal to approve a new management contract between the fund and
          Pioneer Investment Management, Inc., your fund's investment adviser
          ("Pioneer"). This new contract will take effect only if the proposed
          acquisition of The Pioneer Group, Inc. ("PGI"), the parent of
          Pioneer, by UniCredito Italiano S.p.A. ("UniCredito") is consummated;

    2.    To elect the eight trustees of the fund, as named in the attached
          proxy statement, to serve on the board of trustees until their
          successors have been duly elected and qualified;

    3.    To ratify the selection of Arthur Andersen LLP as the fund's
          independent public accountants for the fiscal year ending December
          31, 2000; and

    4.    To consider any other business that may properly come before the
          meeting.

YOUR TRUSTEES RECOMMEND THAT YOU VOTE IN FAVOR OF ALL THE PROPOSALS. APPROVAL
OF A NEW MANAGEMENT CONTRACT IS REQUIRED BECAUSE OF THE CHANGE IN CONTROL OF
PGI. THERE ARE NO MATERIAL DIFFERENCES BETWEEN THE EXISTING MANAGEMENT CONTRACT
AND THE PROPOSED MANAGEMENT CONTRACT. APPROVAL OF PROPOSAL 1 WILL NOT INCREASE
THE MANAGEMENT FEE RATE PAYABLE BY THE FUND.








                                                                    8359-00-0600

<PAGE>

     Shareholders of record as of the close of business on July 13, 2000 are
entitled to vote at the meeting and any related follow-up meetings.

                               By Order of the Board of Trustees,

                               Joseph P. Barri, Secretary

Boston, Massachusetts
July 24, 2000

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

WHETHER OR NOT YOU EXPECT TO ATTEND THE MEETING, PLEASE COMPLETE AND RETURN THE
ENCLOSED PROXY.

<PAGE>

                               PROXY STATEMENT OF
                             PIONEER INTEREST SHARES
                                 60 State Street
                           Boston, Massachusetts 02109
                                 1-800-225-6292

                         ANNUAL MEETING OF SHAREHOLDERS

     This proxy statement contains the information you should know before
voting on the proposals summarized below.

     The fund will furnish without charge a copy of its most recent annual
report and any more recent semiannual report to any shareholder upon request.
Shareholders who want to obtain a copy of the fund's reports should direct all
written requests to the attention of the fund, at the address listed above, or
should call Pioneering Services Corporation at 1-800-225-6292.


                                  INTRODUCTION

     This proxy statement is being used by the board of trustees of your fund
to solicit proxies to be voted at the annual meeting of shareholders of your
fund. This meeting will be held at the offices of Hale and Dorr LLP, 60 State
Street, 26th Floor, Boston, Massachusetts 02109, at 2:00 p.m., Boston time, on
September 11, 2000, and at any adjournments of the meeting to a later date, for
the purposes as set forth in the accompanying notice of annual meeting of
shareholders.

     This proxy statement and the enclosed proxy card are being mailed to
shareholders on or about July 24, 2000. The annual report for the fund for its
most recently completed fiscal year was previously mailed to shareholders.

     The annual shareholder meeting is being called to consider, among other
things, a proposal related to the proposed acquisition (the "Transaction") of
all of the outstanding shares of The Pioneer Group, Inc. ("PGI"), the parent
company of the fund's investment adviser, Pioneer Investment Management, Inc.
("Pioneer"), by UniCredito Italiano S.p.A. ("UniCredito") and companies
controlled by UniCredito. If Proposal 1, regarding the approval of the proposed
management contract (as defined below), is adopted and the Transaction is
consummated, Pioneer will continue as the fund's investment adviser. The
Transaction is conditioned upon approval of Proposal 1 by shareholders of the
fund and approval of similar proposals by shareholders of other funds in the
Pioneer Family of Funds, together representing at least 92.5% of the aggregate
assets in the Pioneer Family of Funds. The Transaction and the terms of the
proposed management contract are discussed below.


                            WHO IS ELIGIBLE TO VOTE?

     Shareholders of record of the fund as of the close of business on July 13,
2000 (the "record date") are entitled to vote on all of the fund's business at
the annual shareholder meeting and any adjournments thereof. Each share is
entitled to one vote. Shares represented by properly executed proxies, unless
revoked before or at the meeting, will be


                                        1
<PAGE>

voted according to shareholder's instructions. If you sign a proxy, but do not
fill in a vote, your shares will be voted in favor of each of the nominees for
trustee and to approve the other proposals. If any other business comes before
the annual shareholder meeting, your shares will be voted at the discretion of
the persons named as proxies.


The Transaction


Information concerning UniCredito

     UniCredito is a corporation organized under the laws of the Republic of
Italy, and its shares trade on the Milan Stock Exchange. Now the controlling
owner of eight major Italian banks, UniCredito is Italy's largest banking group
based on market capitalization and the 18th largest in Europe in terms of total
assets. UniCredito was formed in 1998 by the merger between Credito Italiano
S.p.A., one of Italy's major banks, and Unicredito S.p.A., an Italian bank
holding company. Through approximately 3,600 branches worldwide, UniCredito
offers a range of services relating to, among other things, banking, life and
property/casualty insurance and equipment leasing.

     UniCredito's asset management business is currently operated through two
subsidiaries, EuroPlus Research and Management in Dublin and EuroPlus SGR in
Milan, under the EuroPlus brand. They are among Europe's largest and
fastest-growing asset managers, with approximately $80 billion in assets under
management, 90 established mutual funds (in Italy and Luxembourg) and 13 new
funds ready to be launched. EuroPlus currently serves approximately 200
institutional clients and over 5,000 high net worth clients. Its share of the
retail and institutional markets in Italy and Europe makes EuroPlus the largest
institutional account manager in Italy, the third largest mutual fund manager
in Italy and the fifth largest mutual fund manager in Europe.

     As part of UniCredito's acquisition of PGI, UniCredito will be
restructuring the ownership of its current investment management operations.
UniCredito owns 65% of EuroPlus SGR and EuroPlus Research and Management. A
majority owned subsidiary of UniCredito, Rolo Banca, holds the remaining shares
of EuroPlus SGR. After acquiring PGI and as part of the Transaction, UniCredito
intends to establish a holding company that will own 100% of PGI and its other
investment management subsidiaries. UniCredito will own approximately 66.6% of
the holding company and Rolo Banca will own the remaining interest. This
arrangement will permit UniCredito efficiently to manage its investment
advisory operations by bringing them under a uniform ownership structure. The
name of the holding company will be Pioneer Global Asset Management, and it
will have combined assets under management of approximately $100 billion.
Pioneer Global Asset Management will conduct its asset management business
through three operational units: Pioneer Research and Management (currently
EuroPlus Research and Management), Pioneer SGR (currently EuroPlus SGR) and
Pioneer U.S. (currently PGI). Because of the timing of certain Italian legal
requirements in connection with the new holding company, the Transaction will
take place in two phases. UniCredito will acquire 100% of PGI as soon as
possible, and the holding company structure, with UniCredito directly owning
only approximately 66.6%, is expected to be completed in the first half of
2001. However,


                                        2
<PAGE>

because the two parts are elements of the same Transaction, your approval of
the new management contract would also constitute approval for the
establishment of the holding company.

     The corporate seat of UniCredito is located in Genoa, Italy, where
UniCredito was founded in 1870. The principal executive offices of UniCredito
are located at Piazza Cordusio, 20123 Milan, Italy, and its telephone number is
011-39-02-88621.


The terms of the merger agreement

     At the closing of the Transaction, UniCredito will acquire, by merging a
wholly owned subsidiary into PGI, all the issued and outstanding shares of
common stock of PGI for an aggregate merger consideration of approximately $1.2
billion, or $43.50 per share. Immediately prior to the effective time of the
Transaction, PGI will also distribute to its stockholders all of the shares of
a newly formed company that will conduct, after the effective date of the
merger, Russian PGI's gold exploration, Russian timber harvesting, Russian real
estate and investment management and Polish and Eastern European real estate
management and venture capital businesses. The merger consideration is not
subject to adjustment, and there is no financing condition to the consummation
of the Transaction. Messrs. John F. Cogan, Jr. and David D. Tripple, trustees
of the fund and executive officers of PGI and Pioneer, will receive a portion
of the merger consideration in exchange for their shares of PGI, and Mr. Cogan
will also receive a bonus payment of $700,000 upon consummation of the
Transaction. Mr. Cogan is expected to become the Deputy Chairman of Pioneer
Global Asset Management and non-executive Chairman of Pioneer U.S. Mr. Tripple
is expected to be Chief Executive Officer of Pioneer U.S.

     The initial phase of the Transaction is expected to close during the third
quarter of 2000, provided that a number of conditions set forth in the merger
agreement, dated as of May 14, 2000, between PGI and UniCredito (the "Merger
Agreement"), are met or waived. These conditions include the approval of the
Merger Agreement by PGI's stockholders, the approval of a new management
contract by shareholders of the fund and approval of similar new management
contracts by shareholders of other funds in the Pioneer Family of Funds,
together representing at least 92.5% of the aggregate assets in the Pioneer
Family of Funds, and obtaining certain regulatory approvals. The second stage
in which Rolo Banca will acquire a minority interest in Pioneer Global Asset
Management is expected to occur in the first half of 2001.

     No change in the fund's portfolio management team is anticipated to occur
in connection with the Transaction. PGI has agreed to provide bonus payments
and other benefits to certain Pioneer personnel in order that there is no
disruption in the quality of services provided to shareholders of the fund in
connection with the Transaction. However, UniCredito's purchase of 100% of PGI
is not conditioned upon the continued employment of any Pioneer personnel, and
there can be no assurance that any particular Pioneer employee will choose to
remain employed by UniCredito or its affiliates.

                                        3
<PAGE>

Anticipated benefits of the Transaction

     Pioneer anticipates that the Transaction and its affiliation with
UniCredito will benefit Pioneer and the fund in a number of ways, including the
following:

o  Pioneer's expertise may be enhanced by the experience and expertise of
   UniCredito's investment management professionals. While no change in the
   management of the fund is currently planned, Pioneer will be able to draw
   upon the expertise of UniCredito's team of professionals to strengthen
   Pioneer's portfolio management capabilities.

o  The combination will provide additional opportunities for Pioneer's personnel
   and provide the security of being part of a larger, financially stronger
   company. This development should enhance Pioneer's ability to attract and
   retain highly qualified staff members.

o  UniCredito has made the growth of its asset management operations a key
   component of its business plans. This commitment should assist Pioneer in
   continuing to expand its business, attract more assets to the fund and
   maintain the high level of services it provides to the fund.


                                   PROPOSAL 1

                      APPROVAL OF A NEW MANAGEMENT CONTRACT

Summary

     Pioneer has served as the fund's investment adviser since December 1993.

     Pioneer serves as the investment adviser for each fund in the Pioneer
Family of Funds and for other institutional accounts. Pioneer, a registered
investment adviser under the Investment Advisers Act of 1940, as amended, is a
wholly owned subsidiary of PGI. Both Pioneer and PGI are located at 60 State
Street, Boston, Massachusetts 02109.

     At meetings of the board of trustees for the fund held on June 13, 2000
and July 11, 2000, the trustees, including all of the trustees who are not
"interested persons" of the fund, Pioneer or UniCredito, unanimously approved
as in the best interest of shareholders, and voted to recommend that the
shareholders of the fund approve, a proposal to adopt a new management contract
with Pioneer (the "proposed management contract") effective upon UniCredito's
purchase of 100% of PGI.

     Shareholders of the fund are being asked to approve the fund's proposed
management contract with Pioneer. UniCredito's purchase of 100% of PGI and the
restructuring of UniCredito's investment management business will constitute an
"assignment" (as defined in the Investment Company Act of 1940 (the "1940
Act")) of the fund's current management contract with Pioneer (the "existing
management contract"). As required by the 1940 Act, the existing management
contract provides for its automatic termination in the event of an assignment.
Accordingly, the existing management contract will terminate upon the
consummation of the Transaction and a new management contract is being proposed
to enable Pioneer to continue to manage the fund.

Terms of the proposed management contract and existing management contract

     The terms of the fund's proposed management contract are substantially
identical to the terms of the fund's existing management contract, except for
the dates of execution,


                                        4
<PAGE>

effectiveness and termination and for certain non-material amendments to
conform the terms of the management contract to the standard form of management
contract for the other funds in the Pioneer Family of Funds. The stated
management fee to be paid by the fund is identical under the proposed
management contract and the existing management contract. Except as discussed
under the caption "Other provisions under the existing and proposed management
contracts," all the terms described below with respect to the fund's proposed
management contract were contained in the fund's existing management contract.
The following summary of the proposed management contract is qualified by
reference to the form of proposed management contract attached to this proxy
statement as Exhibit A. Information regarding Pioneer, its principal executive
officer and directors, another of its investment company clients and brokerage
policy is included in Exhibit B to this proxy statement.

     Management services. The management services to be provided by Pioneer to
the fund under the proposed management contract are identical to those provided
by Pioneer under the fund's existing management contract. Pursuant to the terms
of the existing management contract, Pioneer serves as investment adviser to
the fund and is responsible for the overall management of the fund's business
affairs subject only to the authority of the board of trustees. Pioneer is
authorized to buy and sell securities for the account of the fund and to
designate brokers to carry out such transactions. Pioneer may not make any
purchase the cost of which exceeds the fund's available liquid assets and may
not make any purchase which would violate any fundamental policy or restriction
in the fund's prospectus or statement of additional information as in effect
from time to time.

     Payment of expense and transaction charges. The proposed management
contract and the existing management contract for the fund will contain
identical provisions relating to the expenses to be borne by the fund. The
fund's existing management contract and proposed management contract provide
that the expenses borne by the fund will include: (i) the charges and expenses
for fund accounting, pricing and appraisal services and related overhead,
including, to the extent such services are performed by personnel of Pioneer or
its affiliates, office space and facilities and personnel compensation,
training and benefits; (ii) the charges and expenses of auditors; (iii) the
charges and expenses of any custodian, transfer agent, plan agent, dividend
disbursing agent and registrar appointed by the fund; (iv) issue and transfer
taxes chargeable to the fund in connection with securities transactions to
which the fund is a party; (v) insurance premiums, interest charges, dues and
fees for membership in trade associations and all taxes and corporate fees
payable by the fund to federal, state or other governmental agencies; (vi) fees
and expenses involved in registering and maintaining registrations of the fund
and/or its shares with federal regulatory agencies, state or blue sky
securities agencies and foreign jurisdictions, including the preparation of
prospectuses and statements of additional information for filing with such
regulatory authorities; (vii) all expenses of shareholders' and trustees'
meetings and of preparing, printing and distributing prospectuses, notices,
proxy statements and all reports to shareholders and to governmental agencies;
(viii) charges and expenses of legal counsel to the fund and the trustees; (ix)
any distribution expenses; (x) compensation of those trustees of the fund who
are not affiliated with, or "interested persons" of, Pioneer, the fund (other
than as trustees), PGI or Pioneer Funds Distributor,


                                        5
<PAGE>

Inc. ("PFD"); (xi) the cost of preparing and printing share certificates; (xii)
interest on borrowed money, if any; and (xiii) the fees and other expenses of
listing the fund's shares on the New York Stock Exchange or any other national
stock exchange.

     Under both the existing and the proposed management contracts for the
fund, Pioneer, at its own expense, will furnish to the fund office space in its
offices or in such other place as may be agreed upon from time to time, and all
necessary office facilities, equipment and personnel for managing the affairs
and investments and supervising the keeping of the books of the fund and shall
arrange, if desired by the fund, for members of Pioneer's organization to serve
as officers or agents of the fund.

     Also, under both the existing and proposed management contracts for the
fund, Pioneer will pay directly or reimburse the fund for: (i) compensation (if
any) of the trustees who are affiliated with, or "interested persons" (as
defined in the 1940 Act) of, Pioneer and all officers of the fund as such; and
(ii) all expenses not specifically assumed by the fund where such expenses are
incurred by Pioneer or by the fund in connection with the management of the
affairs of, and the investment and reinvestment of the assets of, the fund.

     The fund has also entered into an administration agreement with Pioneer
pursuant to which the fund authorizes Pioneer to provide certain fund
accounting services and legal services that Pioneer is not required to provide
under the existing management contract. Under the administration agreement,
Pioneer is reimbursed for its allocable portion of its direct costs of such
services. The allocable portion of such costs is based upon the time worked by
Pioneer's employees rendering such services for the fund as a percentage of the
total hours worked by such employees. Pioneer's direct costs include any
out-of-pocket expenses incurred by Pioneer in rendering such services, an
allocable portion of the salaries and benefits of the employees rendering such
services and a reasonable allocation of overhead. Annual allocation and
reimbursement of these expenses is subject to annual approval of the fund's
independent trustees.

     Management fees. For its services, Pioneer is entitled to a management
fee. The method and rate for calculating the fund's management fee will be the
same under the fund's proposed management contract as under its existing
management contract (such method and rate are set forth below). If the proposed
management contract had been in effect for the fund's most recently completed
fiscal year, the amount of management fees payable to Pioneer by the fund would
have been identical to those payable under the existing management contract.
There will be no increase in the management fee rate in connection with the
Transaction.

     The fund pays Pioneer a management fee at a rate equal to 0.625% of the
fund's average daily net assets up to $50 million and 0.50% of average daily
net assets in excess of $50 million. The fee is calculated and accrued daily
and paid monthly in arrears. The aggregate amount of investment advisory fees
paid by the fund to Pioneer for the fund's most recently completed fiscal year
ended December 31, 1999 was $548,109 and was $538,598 for the 12 months ended
March 31, 2000. The existing management contract was most recently submitted to
shareholders for approval on July 9, 1996, in connection with the
reorganization of the fund as a Delaware business trust.


                                        6
<PAGE>

Other provisions under the existing and proposed management contracts

     Standard of care. Under the existing and proposed management contracts,
Pioneer "will not be liable for any error of judgment or mistake of law or for
any loss sustained by reason of the adoption of any investment policy or the
purchase, sale, or retention of any security on the recommendation of
[Pioneer]. . . ." Pioneer, however, shall not be protected against liability by
reason of its "willful misfeasance, bad faith or gross negligence in the
performance of its duties or by reason of its reckless disregard of its
obligations and duties under" either the existing or proposed management
contract.

     Pioneer's authority. The existing and proposed management contracts
provide that Pioneer shall have full discretion to act for the fund in
connection with the purchase and sale of portfolio securities subject only to
the declaration of trust, bylaws, currently effective registrations under the
1940 Act and the Securities Act of 1933, as amended, investment objective,
policies and restrictions of the fund in effect from time to time, and specific
policies and instructions established from time to time by the trustees.

     Portfolio trading. The existing and proposed management contracts
expressly permit Pioneer to engage in portfolio trading. For a more detailed
description of Pioneer's current portfolio brokerage practices, see Exhibit B
to this proxy statement.

     Expense limitation. The existing and proposed management contracts provide
that Pioneer may from time to time agree not to impose all or a portion of its
fee or otherwise take action to reduce expenses of the fund. Except as may
otherwise be agreed to by Pioneer, any such fee limitation or expense reduction
is voluntary and may be discontinued or modified by Pioneer at any time. The
existing and proposed management contracts for the fund also contain a
provision which limits the fund's operating expenses to the highest limit set
by state securities law. The proposed management contract for the fund will be
revised to eliminate this provision because it is no longer necessary under
federal securities laws.

     Other provisions. The proposed management contract will be amended to
expressly permit Pioneer to delegate its investment advisory duties to a
subadviser. Any use of subadvisers would be subject to approval by the fund's
independent trustees. The existing and proposed management contracts for the
fund contain a provision which prohibits the fund from using the name "Pioneer"
in the event Pioneer or any of its affiliates cease to act as the investment
adviser of the fund.

     Each existing and proposed management contract includes provisions that
provide that: (i) the law of The Commonwealth of Massachusetts shall be the
governing law of the contract; (ii) Pioneer is an independent contractor and
not an employee of the fund; (iii) the contract is the entire agreement between
the parties with respect to the matters described therein; (iv) the contract
may be executed using counterpart signature pages; and (v) invalid or
unenforceable provisions of the contract are severable and do not render the
entire agreement invalid or unenforceable.

Miscellaneous

     If approved by shareholders, the fund's proposed management contract will
become effective upon UniCredito's purchase of 100% PGI and will continue in
effect until


                                        7
<PAGE>

December 31, 2001 and thereafter will continue from year to year subject to
annual approval by the board of trustees in the same manner as the existing
management contract. The fund's proposed management contract terminates if
assigned (as defined in the 1940 Act) and may be terminated without penalty by
either party, by vote of its board or by a vote of a majority of the
outstanding voting securities of the fund and upon 60 days' written notice.


Additional information pertaining to Pioneer

     For additional information concerning the management, ownership structure,
affiliations, brokerage policies and certain other matters pertaining to
Pioneer, see Exhibit B.


Factors considered by the trustees

     The trustees of the fund determined that the terms of the proposed
management contract are fair and reasonable and that approval of the proposed
management contract on behalf of the fund is in the best interests of the fund.
The trustees also determined that the continuity and efficiency of management
services after the consummation of the Transaction can best be assured by
approving the proposed management contract on behalf of the fund. The trustees
believe that the proposed management contract will enable the fund to continue
to enjoy high quality investment advisory services at costs which they deem
appropriate, reasonable and in the best interests of the fund and its
shareholders.

     In evaluating the proposed management contract, the trustees reviewed
materials furnished by Pioneer and UniCredito, including information regarding
Pioneer, UniCredito, Rolo Banca, their respective affiliates and their
personnel, operations and financial condition. The trustees also reviewed the
terms of the Transaction and its possible effects on the fund and its
shareholders. Representatives of Pioneer discussed with the trustees the
anticipated effects of the Transaction and, together with a representative of
UniCredito, indicated their belief that as a consequence of the Transaction,
the operations of the fund and the capabilities of Pioneer to provide advisory
and other services to the fund would not be adversely affected and should be
enhanced by the resources of UniCredito, though there could be no assurance as
to any particular benefits that may result. The trustees also reviewed
information regarding the investment performance of the fund on an absolute
basis and compared to investment companies with similar investment objectives
and policies (the "peer group"), the fees and expenses incurred by the fund
compared to its peer group and the profitability to Pioneer in managing the
fund.

     The trustees also specifically considered the following as relevant to
their recommendations: (1) that the terms of the proposed management contract
are substantially identical to those of the existing management contract,
except for a different execution date, effective date, and termination date and
certain non-material changes; (2) the favorable history, reputation,
qualification and background of Pioneer and UniCredito, as well as the
qualifications of their personnel and their respective financial conditions;
(3) that the fee and expense ratios of the fund are reasonable given the
quality of services expected to be provided and are comparable to the fee and
expense ratios of similar mutual funds; (4) the relative performance of the
fund since Pioneer has served as its investment adviser


                                        8
<PAGE>

to comparable mutual funds and unmanaged indices; (5) the commitment of PGI to
pay the expenses of the funds in connection with the Transaction so that
shareholders of the fund would not have to bear such expenses; (6) the
possibility of benefits that may be realized by the funds as a result of
Pioneer's affiliation with UniCredito, including any resources of UniCredito
that would be available to Pioneer; (7) the Transaction ensures continuity of
management of the fund and reduces vulnerability to changes in control of PGI
that may be adverse to the fund's interests; (8) assurances from UniCredito
that UniCredito does not intend to make any material changes to Pioneer's
financial, human and other resources that would adversely impact Pioneer's
ability to provide the same quality of investment management and other services
that Pioneer has provided in the past; and (9) other factors deemed relevant by
the trustees. The trustees deemed the factors set forth in clauses (1), (2),
(3), (6), (7) and (8) to be particularly persuasive in their decision to
recommend to the fund's shareholders that they approve the proposed management
contract. The trustees considered the other factors set forth above to be
relevant to a lesser extent than those set forth in clauses (1), (2), (3), (6),
(7) and (8).


Section 15(f) of the 1940 Act

     Section 15(f) of the 1940 Act permits, in the context of a change in
control of an investment adviser to a registered investment company, the
receipt by such investment adviser (or any of its affiliated persons) of any
amount or benefit in connection with such sale, as long as two conditions are
satisfied. First, there may not be imposed an "unfair burden" on the investment
company as a result of the sale of such interest, or any express or implied
terms, conditions or understandings applicable thereto. The term "unfair
burden," as defined in the 1940 Act, includes any arrangement during the
two-year period after the transaction whereby the investment adviser (or
predecessor or successor adviser), or any interested person of any such
adviser, receives or is entitled to receive any compensation, directly or
indirectly, from the investment company or its security holders (other than
fees for bona fide investment advisory or other services), or from any person
in connection with the purchase or sale of securities or other property to,
from or on behalf of the investment company (other than ordinary fees for bona
fide principal underwriting services).

     The board of trustees has not been advised by Pioneer of any circumstances
arising from the Transaction that might result in the imposition of an "unfair
burden" being imposed on the fund. Moreover, UniCredito has agreed in the
Merger Agreement that (i) for a period of three years after UniCredito's
purchase of 100% of PGI, UniCredito and its affiliates will use reasonable
efforts to assure that at least 75% of the fund's board of trustees are not
"interested persons" (as defined in the 1940 Act) of UniCredito or Pioneer and
(ii) for two years after UniCredito's purchase of 100% of PGI, UniCredito and
its affiliates will refrain from imposing, or agreeing to impose, an unfair
burden on the fund.


Trustees' recommendation

     The independent trustees of the fund held meetings to consider the
proposed management contract and the Transaction on May 25, 2000, June 8, 2000,
June 12, 2000 and


                                        9
<PAGE>

July 11, 2000, and the entire board of trustees considered the proposal at
meetings held on June 13, 2000 and July 11, 2000. Based on their evaluation of
the materials presented and assisted by the advice of independent counsel, the
trustees at the meetings held on June 13, 2000 and July 11, 2000, including all
the trustees who are not "interested persons" of the fund, Pioneer or
UniCredito, unanimously concluded that the terms of the proposed management
contract for the fund are reasonable, fair and in the best interests of the
fund and its shareholders, and that the fees provided therein are fair and
reasonable in light of the usual and customary charges made by others for
services of the same nature and quality. The trustees, by a unanimous vote cast
at the meetings, approved and voted to recommend to the shareholders of the
fund that they approve the proposed management contract.

     If the shareholders of the fund do not approve the proposed management
contract and the purchase by UniCredito of 100% of PGI is completed, the
trustees of the fund would consider what further action to take consistent with
their fiduciary duties to the fund. Such actions may include obtaining for the
fund interim investment advisory services at cost or at the current fee rate
either from Pioneer or from another advisory organization. Thereafter, the
trustees of the fund would either negotiate a new investment advisory agreement
with an advisory organization selected by the trustees or make other
appropriate arrangements. In the event UniCredito's purchase of 100% of PGI is
not completed, Pioneer would continue to serve as investment adviser of the
fund pursuant to the terms of the existing management contract.


Required vote

     As provided under the 1940 Act, approval of the proposed management
contract will require the vote of a majority of the outstanding voting
securities of the fund. In accordance with the 1940 Act and as used in this
Proposal 1, a "majority of the outstanding voting securities" of the fund means
the lesser of (1) 67% or more of the shares of the fund present at a
shareholder meeting if the owners of more than 50% of the shares of the fund
then outstanding are present in person or by proxy, or (2) more than 50% of the
outstanding shares of the fund entitled to vote at the shareholder meeting.
Approval of the proposed management contract will constitute approval by
shareholders of the adoption of the management contract upon the acquisition of
PGI by UniCredito and the continuance of the management contract upon the
subsequent transfer of a minority interest in Pioneer Global Asset Management
to Rolo Banca.

     However, in addition to the legal requirement under the 1940 Act, the
consummation of the Transaction is conditioned upon the approval of the
proposed management contract by shareholders of the fund and approval of
similar new management contracts by shareholders of other funds in the Pioneer
Family of Funds, together representing at least 92.5% of the aggregate assets
in the Pioneer Family of Funds.

     For the reasons set forth above, the trustees of your fund unanimously
recommend that shareholders vote in favor of the proposed management contract.


                                       10
<PAGE>

                                   PROPOSAL 2

                          ELECTION OF BOARD OF TRUSTEES

     Shareholders of the fund are being asked to consider the election of eight
nominees to the board of trustees of the fund. All of the nominees for election
to the fund's board currently serve as trustees for the fund. Each trustee will
be elected to hold office until the next meeting of shareholders or until his
or her successor is elected and qualified. Each nominee has consented to being
named in this proxy statement and indicated his or her willingness to serve if
elected. If any nominee should be unable to serve, an event which is not
anticipated, the persons named as proxies may vote for such other person as
shall be designated by the fund's board of trustees. The persons named on the
accompanying proxy card intend to vote at the meeting (unless otherwise
directed) for the election of the nominees named below as trustees of the fund.

     The following table sets forth each nominee's position(s) with the fund,
and his or her age, address, principal occupation and employment during the
past five years and any other directorship held. The table also indicates the
year during which he or she first became a trustee of the fund and the number
of shares of the fund beneficially owned by each nominee, directly or
indirectly, on May 31, 2000.


                                       11
<PAGE>

<TABLE>
<CAPTION>
                                                                                       Number of shares
                                                                                           owned and
                                                                           First      percentage of total
  Name (age), position(s)       Principal occupation or employment       became a     shares outstanding
 with the fund and address         and trustee/directorships(1)           trustee     on May 31, 2000(2)
---------------------------   ---------------------------------------   ----------   --------------------
<S>                           <C>                                         <C>        <C>
John F. Cogan, Jr.*           President, Chief Executive Officer          1993       1,000/0.01%
(74)                          and a Director of PGI; Chairman
Chairman of the Board,        and a Director of Pioneer, PFD,
President and Trustee         Closed Joint-Stock Company
60 State Street               "Forest-Starma" and Pioneer
Boston, MA 02109              Global Funds Distributor, Ltd.;
                              Director of Pioneer Real Estate
                              Advisors, Inc. ("PREA"), Pioneer
                              Forest, Inc., Pioneer Management
                              (Ireland) Limited ("PMIL"),
                              Pioneer First Investment Fund and
                              PIOGlobal Corporation ("PIOGlobal");
                              President and Director of Pioneer
                              International Corporation ("PIntl"),
                              Pioneer First Russia, Inc. ("PFR")
                              and Pioneer Omega, Inc. ("Pioneer
                              Omega"); Member of the
                              Supervisory Board of Pioneer
                              Funds Marketing GmbH, Pioneer
                              First Polish Investment Fund Joint
                              Stock Company ("Pioneer First
                              Polish"), Pioneer Czech Investment
                              Company, a.s. ("Pioneer Czech")
                              and Pioneer Universal Pension
                              Fund Company; Chairman,
                              President and Trustee of all of the
                              Pioneer mutual funds; Director of
                              Pioneer America Fund Plc, Pioneer
                              Diversified Income Fund Plc,
                              Pioneer Global Equity Fund Plc,
                              Pioneer Global Bond Fund Plc,
                              Pioneer Euro Reserve Fund Plc,
                              Pioneer European Equity Fund Plc,
                              Pioneer Emerging Europe Fund
                              Plc, Pioneer Greater Asia Fund
                              Plc, Pioneer U.S. Growth Fund Plc
                              and Pioneer US Real Estate Fund
                              Plc (collectively, the "Irish Funds");
                              and Of Counsel, Hale and Dorr
                              LLP (counsel to PGI and the
                              fund).
</TABLE>

                                       12
<PAGE>


<TABLE>
<CAPTION>
                                                                                     Number of shares
                                                                                         owned and
                                                                         First      percentage of total
  Name (age), position(s)       Principal occupation or employment     became a     shares outstanding
 with the fund and address         and trustee/directorships(1)         trustee     on May 31, 2000(2)
---------------------------   -------------------------------------   ----------   --------------------
<S>                           <C>                                       <C>          <C>
Mary K. Bush                  President, Bush & Co.                     1997                0
(52)                          (international financial advisory
Trustee                       firm); Director and/or Trustee of
4201 Cathedral Ave., N.W.     Mortgage Guaranty Insurance
Washington, D.C. 20016        Corporation, Hoover Institution,
                              March of Dimes, Texaco, Inc., R.J.
                              Reynolds Tobacco Holdings, Inc.
                              and Brady Corporation; Advisory
                              Board Member, Washington
                              Mutual Investors Fund (registered
                              investment company); and Trustee
                              of all of the Pioneer mutual funds,
                              except Pioneer Variable Contracts
                              Trust.

Richard H. Egdahl, M.D.       Alexander Graham Bell Professor           1993       1,000/0.01%
(73)                          of Health Care Entrepreneurship,
Trustee                       Boston University; Professor of
Boston University             Management, Boston University
Healthcare                    School of Management; Professor
Entrepreneurship              of Public Health, Boston University
Program                       School of Public Health; Professor
53 Bay State Road             of Surgery, Boston University
Boston, MA 02215              School of Medicine; University
                              Professor, Boston University;
                              Director, Boston University Health
                              Policy Institute, University Program
                              for Health Care Entrepreneurship;
                              Trustee, Boston Medical Center;
                              and Trustee of all of the Pioneer
                              mutual funds.

Margaret B.W. Graham          Founding Director, The Winthrop           1993        100/<0.01%
(53)                          Group, Inc. (consulting firm);
Trustee                       and Trustee of all of the Pioneer
The Keep                      mutual funds, except Pioneer
P.O. Box 110                  Variable Contracts Trust.
Little Deer Isle, ME
04650
</TABLE>

                                       13
<PAGE>

<TABLE>
<CAPTION>
                                                                                    Number of shares
                                                                                        owned and
                                                                        First      percentage of total
  Name (age), position(s)      Principal occupation or employment     became a     shares outstanding
 with the fund and address        and trustee/directorships(1)         trustee      on May 31, 2000(2)
---------------------------   ------------------------------------   ----------   --------------------
<S>                           <C>                                    <C>          <C>
Marguerite A. Piret           President, Newbury, Piret &              1993       100/<0.01%
(52)                          Company, Inc. (merchant banking
Trustee                       firm); Trustee of Boston Medical
One Boston Place              Center; Member of the Board of
26th Floor                    Governors of the Investment
Boston, MA 02108              Company Institute; Director,
                              Organogenesis Inc. (tissue
                              engineering company); and
                              Trustee of all of the Pioneer
                              mutual funds.

David D. Tripple*             Executive Vice President and a           1993       100/<0.01%
(56)                          Director of PGI; President and
Executive Vice President      a Director of Pioneer and PFD;
and Trustee                   Director of Pioneering Services
60 State Street               Corporation ("PSC"), PIntl,
Boston, MA 02109              PIOGlobal, Pioneer Omega, PMIL
                              and the Irish Funds; Member of
                              the Supervisory Board of Pioneer
                              First Polish and Pioneer Czech
                              and Pioneer Asset Management,
                              S.A.; and Executive Vice President
                              and Trustee of all of the Pioneer
                              mutual funds.

Stephen K. West               Of Counsel, Sullivan & Cromwell          1993       381/<0.01%
(71)                          (law firm); Director, Dresdner
Trustee                       RCM Global Strategic Income
125 Broad Street              Fund, Inc. since May 1997 and
New York, NY 10004            The Swiss Helvetia Fund, Inc.
                              since 1995 (investment companies),
                              AMVESCAP PLC (investment
                              managers) since 1997 and ING
                              American Insurance Holdings,
                              Inc.; and Trustee of all of the
                              Pioneer mutual funds.

John Winthrop                 President, John Winthrop & Co.,          1993       101/<0.01%
(64)                          Inc. (private investment firm);
Trustee                       Director of NUI Corp. (energy
One North Adgers Wharf        sales, services and distribution);
Charleston, SC 29401          and Trustee of all of the Pioneer
                              mutual funds, except Pioneer
                              Variable Contracts Trust.
</TABLE>

------------
  * Messrs. Cogan and Tripple are "interested persons" of the fund and Pioneer
    within the meaning of Section 2(a)(19) of the 1940 Act.
(1) Each trustee was most recently elected by the shareholders of the fund in
    1999.
(2) As of May 31, 2000, the trustees and officers of the fund beneficially
    owned, directly or indirectly, in the aggregate less than 1% of the fund's
    outstanding shares.

                                       14
<PAGE>

     Ms. Piret, Mr. West and Mr. Winthrop serve on the audit committee of the
board of trustees. The functions of the audit committee include recommending
independent auditors to the trustees, monitoring the independent auditors'
performance, reviewing the results of audits and responding to certain other
matters deemed appropriate by the trustees. Ms. Graham, Ms. Piret and Mr.
Winthrop serve on the nominating committee of the board of trustees. The
primary responsibility of the nominating committee is the selection and
nomination of candidates to serve as independent trustees. The nominating
committee will also consider nominees recommended by shareholders to serve as
trustees provided that shareholders submitting such recommendations comply with
all relevant provisions of Rule 14a-8 under the Securities Exchange Act of
1934, as amended (the "Exchange Act").

     During the fiscal year ended December 31, 1999, the board of trustees held
12 meetings, the audit committee held 11 meetings and the nominating committee
did not hold any meetings. All of the current trustees and committee members
then serving attended at least 75% of the meetings of the board of trustees and
applicable committees, if any, held during the fiscal year ended December 31,
1999.

     As of May 31, 2000, Mr. Cogan beneficially owned 3,623,002 shares (13.36%)
of the outstanding common stock of PGI. Mr. Cogan's beneficial holdings
included 749,708 shares held in trusts with respect to which he may be deemed
to be a beneficial owner by reason of his interest as a beneficiary and/or
position as a trustee and shares which he has the right to acquire under
outstanding options within 60 days of May 31, 2000. At such date, David D.
Tripple owned beneficially 358,485 shares (1.24%) of the outstanding common
stock of PGI. None of the other nominees own more than 1% of the outstanding
common stock of PGI.


Other executive officers

     In addition to Messrs. Cogan and Tripple, who serve as executive officers
of the fund, the following table provides information with respect to the other
executive officers of the fund. Each executive officer is elected by the board
of trustees and serves until his successor is chosen and qualified or until his
resignation or removal by the board. The business address of all officers of
the fund is 60 State Street, Boston, Massachusetts 02109.

<TABLE>
<CAPTION>
 Name (age), and position with the fund                     Principal occupation(s)
----------------------------------------   --------------------------------------------------------
<S>                                        <C>
Eric W. Reckard (44), Treasurer            Executive Vice President, Chief Financial Officer and
                                           Treasurer of PGI since June 1999; Treasurer of Pioneer,
                                           PFD, PSC, PIntl, PREA, PFR and Pioneer Omega since
                                           June 1999; Vice President-Corporate Finance of PGI
                                           from February 1999 to June 1999; Manager of Fund
                                           Accounting and Compliance, Business Planning and
                                           Internal Audit of PGI since September 1996; Manager
                                           of Fund Accounting and Compliance of PGI from May
                                           1995 to September 1996 and Treasurer of all of the
                                           Pioneer mutual funds (Assistant Treasurer prior to
                                           June 1999).
</TABLE>

                                       15
<PAGE>


<TABLE>
<CAPTION>
 Name (age), and position with the fund                        Principal occupation(s)
----------------------------------------   ---------------------------------------------------------------
<S>                                        <C>
Joseph P. Barri (53), Secretary            Corporate Secretary of PGI and most of its subsidiaries;
                                           Secretary of all of the Pioneer mutual funds; and Partner,
                                           Hale and Dorr LLP.

Vincent Nave (55), Assistant               Vice President-Fund Accounting, Administration and
Treasurer                                  Custody Services of Pioneer (Manager from September
                                           1996 to February 1999); and Assistant Treasurer of all
                                           of the Pioneer mutual funds since June 1999.

Robert P. Nault (36), Assistant            Senior Vice President of PGI since 1998, General Counsel
Secretary                                  and Assistant Secretary of PGI; Assistant Secretary of
                                           Pioneer, certain other PGI subsidiaries and all of the Pioneer
                                           mutual funds; and Assistant Clerk of PFD and PSC.
</TABLE>

Remuneration of trustees and officers

     The following table provides information regarding the compensation paid
by the fund and the other investment companies in the Pioneer Family of Funds
to the trustees for their services as indicated below during the year ended
December 31, 1999. Compensation paid by the fund to Messrs. Cogan and Tripple,
who are interested persons of Pioneer, is reimbursed to the fund by Pioneer.
The fund does not pay any salary or other compensation to its officers.

<TABLE>
<CAPTION>
                                                   Total compensation
                                                        from the
                                                     fund and other
                                     Aggregate        funds in the
                                    compensation     Pioneer Family
Trustee                            from the fund       of Funds(1)
---------------------------------------------------------------------
<S>                               <C>            <C>
John F. Cogan, Jr. .............. $  750.00       $ 18,000.00(2)
Mary K. Bush ....................  2,880.50         93,500.00
Richard H. Egdahl, M.D. .........  2,880.50         95,500.00
Margaret B.W. Graham ............  2,918.50        102,000.00
Marguerite A. Piret .............  3,064.75        116,750.00
David D. Tripple ................    750.00         18,000.00(2)
Stephen K. West .................  3,026.75        108,250.00
John Winthrop ...................  3,007.75         98,400.00
                                  ---------      ------------
 Totals ......................... 19,278.75       $650,400.00
                                  =========      ============
</TABLE>

------------
(1) For the calendar year ended December 31, 1999. The amounts paid to the
    trustees differ due to (i) service by Dr. Egdahl, Ms. Piret and Mr.
    West as trustees of Pioneer Variable Contracts Trust (another trust in
    the Pioneer Family of Funds), (ii) membership on or chairing certain
    committees of the boards of trustees and (iii) attendance at meetings.
(2) Pioneer fully reimbursed the fund and the other mutual funds in the
    Pioneer Family of Funds for compensation paid to Messrs. Cogan and
    Tripple.


Investment adviser and administrator

     Pioneer, whose executive offices are located at 60 State Street, Boston,
Massachusetts 02109, serves as investment adviser and administrator to the
fund.


                                       16
<PAGE>

Required vote

     In accordance with the fund's declaration of trust, the vote of a
plurality of all of the shares of the fund voted at the meeting is sufficient
to elect the nominees. This means that the eight nominees receiving the
greatest number of votes will be elected to the board. The election of trustees
is not contingent upon UniCredito's purchase of 100% of PGI or the approval of
the proposed management contract.


Recommendation

     For the reasons set forth above, the trustees of your fund unanimously
recommend that shareholders vote in favor of each of the nominees.


                                       17
<PAGE>

                                   PROPOSAL 3

                          RATIFICATION OF SELECTION OF
                         INDEPENDENT PUBLIC ACCOUNTANTS

     The firm of Arthur Andersen LLP has served as your fund's independent
public accountants since 1994. Audit services during the fiscal year ending
December 31, 2000 will consist of examinations of the fund's financial
statements and reviews of the fund's filings with the Securities and Exchange
Commission.

     The fund's board of trustees, including a majority of the trustees who are
not "interested persons" of the fund, PGI or UniCredito, has selected Arthur
Andersen LLP as the fund's independent public accountants for the fiscal year
ending December 31, 2000, subject to shareholder ratification at the meeting. A
representative of Arthur Andersen LLP is expected to be available at the
meeting to make a statement if he or she desires to do so and to respond to
appropriate questions. Arthur Andersen LLP has advised the fund that it has no
direct or indirect financial interest in the fund.


Required vote

     The ratification of the selection of Arthur Andersen LLP as your fund's
independent public accountants for the fiscal year ending December 31, 2000
requires the affirmative vote of a majority of the fund's shares, present in
person or by proxy and entitled to vote at the meeting.


Recommendation

     The trustees of your fund unanimously recommend that you vote for the
ratification of Arthur Andersen LLP as your fund's independent public
accountants for the fiscal year ending December 31, 2000.


                       INFORMATION CONCERNING THE MEETING


Outstanding shares and quorum

     As of the record date, 7,395,024 shares of beneficial interest of the fund
were outstanding. Only shareholders of record as of the record date are
entitled to notice of and to vote at the meeting. A majority of the outstanding
shares of the fund that are entitled to vote will be considered a quorum for
the transaction of business.


Ownership of shares of the fund

     To the knowledge of the fund, as of the record date, no persons owned of
record or beneficially 5% or more of the outstanding shares of the fund as of
May 31, 2000 except that Cede and Co., Box 20, Bowling Green Station, New York,
NY 10004-0001, held 5,351,029 shares as nominee.


                                       18
<PAGE>

Shareholder proposals

     Shareholder proposals to be presented at the next meeting of shareholders,
whenever held, must be received at the fund's offices, 60 State Street, Boston,
Massachusetts 02109, at a reasonable time prior to the trustees' solicitation
of proxies for the meeting and must comply with the requirements of Rule 14a-8
under the Exchange Act. The submission by a shareholder of a proposal for
inclusion in a proxy statement does not guarantee that it will be included. The
Fund currently expects to hold the next annual shareholders' meeting on or
about June 19, 2001, which date is subject to change.


Shares held in retirement plans

     The trustee or custodian of certain retirement plans is permitted to vote
any shares held in such plans in proportion to the percentages voted by
shareholders in person and by proxy, or in some cases, if necessary to obtain a
quorum.


Proxies, quorum and voting at the meeting

     Any shareholder who has given his or her proxy to someone has the power to
revoke that proxy at any time prior to its exercise by executing a superseding
proxy or by submitting a notice of revocation to the secretary of the fund. In
addition, although mere attendance at the meeting will not revoke a proxy, a
shareholder present at the meeting may withdraw his or her proxy and vote in
person. All properly executed and unrevoked proxies received in time for the
meeting will be voted in accordance with the instructions contained in the
proxies. If no instruction is given, the persons named as proxies will vote the
shares represented thereby in favor of the proposals described above and will
use their best judgment in connection with the transaction of such other
business as may properly come before the meeting or any adjournment thereof.

     A majority of the shares entitled to vote, present in person or
represented by proxy, constitutes a quorum for the transaction of business with
respect to any proposal (unless otherwise noted in the proxy statement). In the
event that at the time any session of the meeting is called to order a quorum
is not present in person or by proxy, the persons named as proxies may vote
those proxies which have been received to adjourn the shareholder meeting to a
later date. In the event that a quorum is present but sufficient votes in favor
of any of the proposals, including the election of the nominees to the board of
trustees, have not been received, the persons named as proxies may propose one
or more adjournments of the shareholder meeting to permit further solicitation
of proxies with respect to such proposal. Any such adjournment will require the
affirmative vote of more than one half of the shares of the fund present in
person or by proxy at the session of the meeting to be adjourned. The persons
named as proxies will vote those proxies which they are entitled to vote in
favor of any such proposal in favor of such an adjournment and will vote those
proxies required to be voted against any such proposal against any such
adjournment. A shareholder vote may be taken on one or more of the proposals in
the proxy statement prior to such adjournment if sufficient votes for its
approval have been received and it is otherwise appropriate. Such vote will be
considered final regardless of whether the meeting is adjourned to permit
additional solicitation with respect to any other proposal.


                                       19
<PAGE>

     Shares of the fund represented in person or by proxy, including shares
which abstain or do not vote with respect to a proposal, will be counted for
purposes of determining whether there is a quorum at the meeting. Accordingly,
an abstention from voting has the same effect as a vote against a proposal.
However, if a broker or nominee holding shares in "street name" indicates on
the proxy card that it does not have discretionary authority to vote on a
proposal, those shares will not be considered present and entitled to vote on
that proposal. Thus, a "broker non-vote" has no effect on the voting in
determining whether a proposal has been adopted by 67% or more of the fund's
shares present at the meeting, if more than 50% of the outstanding shares
(excluding the "broker non-votes") are present or represented. However, for
purposes of determining whether a proposal has been adopted by more than 50% of
the outstanding shares of the fund, a "broker non-vote" has the same effect as
a vote against that proposal because shares represented by a "broker non-vote"
are considered to be outstanding shares.


Other business

     While the meeting has been called to transact any business that may
properly come before it, the only matters that the trustees intend to present
are those matters stated in the attached notice of annual meeting of
shareholders. However, if any additional matters properly come before the
meeting, and on all matters incidental to the conduct of the meeting, it is the
intention of the persons named in the enclosed proxy to vote the proxy in
accordance with their judgment on such matters unless instructed to the
contrary.


Method of solicitation and expenses

     The cost of preparing, assembling and mailing this proxy statement and the
attached notice of annual meeting of shareholders and the accompanying proxy
card will be borne by PGI. In addition to soliciting proxies by mail, PGI may,
at its expense, have one or more of the fund's officers, representatives or
compensated third-party agents, including Pioneer, PSC and PFD, aid in the
solicitation of proxies by personal interview or telephone and telegraph and
may request brokerage houses and other custodians, nominees and fiduciaries to
forward proxy soliciting material to the beneficial owners of the shares held
of record by such persons.

     The fund may also arrange to have votes recorded by telephone, the
internet or other electronic means. The voting procedures used in connection
with such voting methods are designed to authenticate shareholders' identities,
to allow shareholders to authorize the voting of their shares in accordance
with their instructions and to confirm that their instructions have been
properly recorded. If these procedures were subject to a successful legal
challenge, such votes would not be counted at the shareholder meeting. The fund
is unaware of any such challenge at this time. Shareholders would be called at
the phone number the sub-transfer agent, Chase Mellon Shareholder Services, has
in its records for their accounts, and would be asked for their Social Security
number or other identifying information. The shareholders would then be given
an opportunity to authorize proxies to vote their shares at the meeting in
accordance with their instructions. To ensure that the shareholders'
instructions have been recorded correctly, they will also receive a


                                       20
<PAGE>

confirmation of their instructions in the mail. In the case of automated
telephone and internet voting, shareholders would be required to provide their
Social Security number or other identifying information and will receive a
confirmation of their instructions. A special toll-free number will be
available in case the information contained in the confirmation is incorrect.

     Persons holding shares as nominees will be reimbursed by PGI, upon
request, for the reasonable expenses of mailing soliciting materials to the
principals of the accounts.

July 24, 2000

                                       21
<PAGE>

                                    EXHIBIT A

                      FORM OF PROPOSED MANAGEMENT CONTRACT

     THIS AGREEMENT dated as of this ______ day of ___________________ , 2000
between Pioneer Interest Shares, a Delaware business trust (the "Trust"), and
Pioneer Investment Management, Inc., a Delaware corporation (the "Manager").


                              W I T N E S S E T H

     WHEREAS, the Trust is registered as an open-end management investment
company under the Investment Company Act of 1940, as amended (the "1940 Act"),
and has filed with the Securities and Exchange Commission (the "Commission") a
registration statement for the purpose of registering its shares for public
offering under the Securities Act of 1933, as amended (the "1933 Act").

     WHEREAS, the parties hereto deem it mutually advantageous that the Manager
should be engaged, subject to the supervision of the Trust's Board of Trustees
and officers, to manage the Trust.

     NOW, THEREFORE, in consideration of the mutual covenants and benefits set
forth herein, the Trust and the Manager do hereby agree as follows:

    1.    The Manager will regularly provide the Trust with investment
          research, advice and supervision and will furnish continuously an
          investment program for the Trust, consistent with the investment
          objective and policies of the Trust. The Manager will determine from
          time to time what securities shall be purchased for the Trust, what
          securities shall be held or sold by the Trust and what portion of the
          Trust's assets shall be held uninvested as cash, subject always to
          the provisions of the Trust's Certificate of Trust, Agreement and
          Declaration of Trust, By-Laws and its registration statements under
          the 1940 Act and under the 1933 Act covering the Trust's shares, as
          filed with the Commission, and to the investment objective, policies
          and restrictions of the Trust, as each of the same shall be from time
          to time in effect, and subject, further, to such policies and
          instructions as the Board of Trustees of the Trust may from time to
          time establish. To carry out such determinations, the Manager will
          exercise full discretion and act for the Trust in the same manner and
          with the same force and effect as the Trust itself might or could do
          with respect to purchases, sales or other transactions, as well as
          with respect to all other things necessary or incidental to the
          furtherance or conduct of such purchases, sales or other
          transactions.

    2.    The Manager will, to the extent reasonably required in the conduct of
          the business of the Trust and upon the Trust's request, furnish to
          the Trust research, statistical and advisory reports upon the
          industries, businesses, corporations or securities as to which such
          requests shall be made, whether or not the Trust shall at the time
          have any investment in such industries, businesses, corporations or
          securities. The Manager will use its best efforts in the preparation


                                       A-1
<PAGE>

          of such reports and will endeavor to consult the persons and sources
          believed by it to have information available with respect to such
          industries, businesses, corporations or securities.

    3.    The Manager will maintain all books and records with respect to the
          Trust's securities transactions required by subparagraphs (b)(5),
          (6), (9) and (10) and paragraph (f) of Rule 31a-1 under the 1940 Act
          (other than those records being maintained by the custodian or
          transfer agent appointed by the Trust) and preserve such records for
          the periods prescribed therefor by Rule 31a-2 under the 1940 Act. The
          Manager will also provide to the Board of Trustees such periodic and
          special reports as the Board may reasonably request.

    4.    Except as otherwise provided herein, the Manager, at its own expense,
          shall furnish to the Trust office space in the offices of the Manager
          or in such other place as may be agreed upon from time to time, and
          all necessary office facilities, equipment and personnel for managing
          the Trust's affairs and investments, and shall arrange, if desired by
          the Trust, for members of the Manager's organization to serve as
          officers or agents of the Trust.

    5.    The Manager shall pay directly or reimburse the Trust for: (i) the
          compensation (if any) of the Trustees who are affiliated with, or
          "interested persons" (as defined in the 1940 Act) of, the Manager and
          all officers of the Trust as such; and (ii) all expenses not
          hereinafter specifically assumed by the Trust where such expenses are
          incurred by the Manager or by the Trust in connection with the
          management of the affairs of, and the investment and reinvestment of
          the assets of, the Trust.

    6.    The Trust shall assume and shall pay: (i) charges and expenses for
          fund accounting, pricing and appraisal services and related overhead,
          including, to the extent such services are performed by personnel of
          the Manager or its affiliates, office space and facilities, and
          personnel compensation, training and benefits; (ii) the charges and
          expenses of auditors; (iii) the charges and expenses of any
          custodian, transfer agent, plan agent, dividend disbursing agent and
          registrar appointed by the Trust; (iv) issue and transfer taxes
          chargeable to the Trust in connection with securities transactions to
          which the Trust is a party; (v) insurance premiums, interest charges,
          dues and fees for membership in trade associations and all taxes and
          corporate fees payable by the Trust to federal, state or other
          governmental agencies; (vi) fees and expenses involved in registering
          and maintaining registrations of the Trust and/or its shares with
          federal regulatory agencies, state or blue sky securities agencies
          and foreign jurisdictions, including the preparation of prospectuses
          and statements of additional information for filing with such
          regulatory authorities; (vii) all expenses of shareholders' and
          Trustees' meetings and of preparing, printing and distributing
          prospectuses, notices, proxy statements and all reports to
          shareholders and to governmental agencies; (viii) charges and
          expenses of legal counsel to the Trust and the Trustees; (ix)
          distribution expenses; (x) compensation of those Trustees of the
          Trust who are not affiliated


                                       A-2
<PAGE>

          with, or "interested persons" of, the Manager, the Trust (other than
          as Trustees), The Pioneer Group, Inc. or Pioneer Funds Distributor,
          Inc.; (xi) the cost of preparing and printing share certificates; and
          (xii) interest on borrowed money, if any; and (xiii) the fees and
          other expenses of listing the Fund's shares on the New York Stock
          Exchange or any other national stock exchange.


    7.   In addition to the expenses described in Section 6 above, the Trust
          shall pay all brokers' and underwriting commissions chargeable to the
          Trust in connection with securities transactions to which the Trust
          is a party.


    8.    The Trust shall pay to the Manager, as compensation for the Manager's
          services hereunder, a fee at a rate equal to 0.625% of the Fund's
          average daily net assets up to $50 million and 0.50% of average daily
          net assets in excess of $50 million. Management fees payable
          hereunder shall be computed daily and paid monthly in arrears. In the
          event of termination of this Agreement, the fee provided in this
          Section shall be computed on the basis of the period ending on the
          last business day on which this Agreement is in effect subject to a
          pro rata adjustment based on the number of days elapsed in the
          current month as a percentage of the total number of days in such
          month.


    9.    The management fee payable hereunder shall be computed daily and paid
          monthly in arrears. In the event of termination of this Agreement,
          the fee provided in Section 8 shall be computed on the basis of the
          period ending on the last business day on which this Agreement is in
          effect subject to a pro rata adjustment based on the number of days
          elapsed in the current month as a percentage of the total number of
          days in such month.


    10.   The Manager may from time to time agree not to impose all or a
          portion of its fee otherwise payable hereunder (in advance of the
          time such fee or a portion thereof would otherwise accrue) and/or
          undertake to pay or reimburse the Trust for all or a portion of its
          expenses not otherwise required to be borne or reimbursed by the
          Manager. Any such fee reduction or undertaking may be discontinued or
          modified by the Manager at any time.


    11.   It is understood that the Manager may employ one or more
          sub-investment advisers (each a "Subadviser") to provide investment
          advisory services to the Trust by entering into a written agreement
          with each such Subadviser; provided, that any such agreement first
          shall be approved by the vote of a majority of the Trustees,
          including a majority of the Trustees who are not "interested persons"
          (as defined in the 1940 Act) of the Trust, the Manager or any such
          Subadviser, and otherwise approved in accordance with the
          requirements of the 1940 Act or an exemption therefrom. The authority
          given to the Manager in Sections 1 through 13 hereof may be delegated
          by it under any such agreement; provided, that any Subadviser shall
          be subject to the same restrictions and limitations on investments
          and brokerage discretion as the Manager. The Trust agrees that the
          Manager shall not be accountable to the Trust or the Trust's
          shareholders for any loss or other liability relating to specific
          invest-


                                       A-3
<PAGE>

          ments directed by any Subadviser, even through the Manager retains
          the right to reverse any such investment because, in the event a
          Subadviser is retained, the Trust and the Manager will rely almost
          exclusively on the expertise of such Subadviser for the selection and
          monitoring of specific investments.

    12.   The Manager will not be liable for any error of judgment or mistake
          of law or for any loss sustained by reason of the adoption of any
          investment policy or the purchase, sale, or retention of any security
          on the recommendation of the Manager, whether or not such
          recommendation shall have been based upon its own investigation and
          research or upon investigation and research made by any other
          individual, firm or corporation, but nothing contained herein will be
          construed to protect the Manager against any liability to the Trust
          or its shareholders by reason of willful misfeasance, bad faith or
          gross negligence in the performance of its duties or by reason of its
          reckless disregard of its obligations and duties under this
          Agreement.

    13.   Nothing in this Agreement will in any way limit or restrict the
          Manager or any of its officers, directors, or employees from buying,
          selling or trading in any securities for its or their own accounts or
          other accounts. The Manager may act as an investment adviser to any
          other person, firm or corporation, and may perform management and any
          other services for any other person, association, corporation, firm
          or other entity pursuant to any contract or otherwise, and take any
          action or do any thing in connection therewith or related thereto;
          and no such performance of management or other services or taking of
          any such action or doing of any such thing shall be in any manner
          restricted or otherwise affected by any aspect of any relationship of
          the Manager to or with the Trust or deemed to violate or give rise to
          any duty or obligation of the Manager to the Trust except as
          otherwise imposed by law. The Trust recognizes that the Manager, in
          effecting transactions for its various accounts, may not always be
          able to take or liquidate investment positions in the same security
          at the same time and at the same price.

    14.   In connection with purchases or sales of securities for the account
          of the Trust, neither the Manager nor any of its directors, officers
          or employees will act as a principal or agent or receive any
          commission except as permitted by the 1940 Act. The Manager shall
          arrange for the placing of all orders for the purchase and sale of
          securities for the Trust's account with brokers or dealers selected
          by the Manager. In the selection of such brokers or dealers and the
          placing of such orders, the Manager is directed at all times to seek
          for the Trust the most favorable execution and net price available
          except as described herein. It is also understood that it is
          desirable for the Trust that the Manager have access to supplemental
          investment and market research and security and economic analyses
          provided by brokers who may execute brokerage transactions at a
          higher cost to the Trust than may result when allocating brokerage to
          other brokers on the basis of seeking the most favorable price and
          efficient execution. Therefore, the Manager is authorized to place
          orders for the purchase and sale of securities for the Trust with
          such brokers, subject to review by the Trust's


                                       A-4
<PAGE>

          Trustees from time to time with respect to the extent and
          continuation of this practice. It is understood that the services
          provided by such brokers may be useful to the Manager in connection
          with its or its affiliates' services to other clients.

    15.   On occasions when the Manager deems the purchase or sale of a
          security to be in the best interest of the Trust as well as other
          clients, the Manager may, to the extent permitted by applicable laws
          and regulations, aggregate the securities to be sold or purchased in
          order to obtain the best execution and lower brokerage commissions,
          if any. In such event, allocation of the securities so purchased or
          sold, as well as the expenses incurred in the transaction, will be
          made by the Manager in the manner it considers to be the most
          equitable and consistent with its fiduciary obligations to the Trust
          and to such clients.

    16.   This Agreement shall become effective on the date hereof and shall
          remain in force until December 31, 2001 and from year to year
          thereafter, but only so long as its continuance is approved in
          accordance with the requirements of the 1940 Act or an exemption
          therefrom, subject to the right of the Trust and the Manager to
          terminate this contract as provided in Section 17 hereof.

    17.   Either party hereto may, without penalty, terminate this Agreement by
          vote of its Board of Trustees or Directors, as the case may be, or by
          vote of a "majority of the outstanding voting securities" (as defined
          in the 1940 Act) of the Trust or the Manager, as the case may be, and
          the giving of 60 days' written notice to the other party.

    18.   This Agreement shall automatically terminate in the event of its
          assignment. For purposes of this Agreement, the term "assignment"
          shall have the meaning given it by Section 2(a)(4) of the 1940 Act.

    19.   The Trust agrees that in the event that neither the Manager nor any
          of its affiliates acts as an investment adviser to the Trust, the
          name of the Trust will be changed to one that does not contain the
          name "Pioneer" or otherwise suggest an affiliation with the Manager.

    20.   The Manager is an independent contractor and not an employee of the
          Trust for any purpose. If any occasion should arise in which the
          Manager gives any advice to its clients concerning the shares of the
          Trust, the Manager will act solely as investment counsel for such
          clients and not in any way on behalf of the Trust.

    21.   This Agreement states the entire agreement of the parties hereto, and
          is intended to be the complete and exclusive statement of the terms
          hereof. It may not be added to or changed orally and may not be
          modified or rescinded except by a writing signed by the parties
          hereto and in accordance with the 1940 Act, when applicable.

    22.   This Agreement and all performance hereunder shall be governed by and
          construed in accordance with the laws of The Commonwealth of
          Massachusetts.


                                       A-5
<PAGE>

    23.   Any term or provision of this Agreement which is invalid or
          unenforceable in any jurisdiction shall, as to such jurisdiction, be
          ineffective to the extent of such invalidity or unenforceability
          without rendering invalid or unenforceable the remaining terms or
          provisions of this Agreement or affecting the validity or
          enforceability of any of the terms or provisions of this Agreement in
          any other jurisdiction.

    24.   This Agreement may be executed simultaneously in two or more
          counterparts, each of which shall be deemed an original, but all of
          which together shall constitute one and the same instrument.

     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed by their duly authorized officers and their seal to be hereto affixed
as of the day and year first above written.


<TABLE>
<S>                                    <C>
ATTEST:                                PIONEER INTEREST SHARES


---------------------------------      -------------------------------------
Joseph P. Barri                        John F. Cogan, Jr.
Secretary                              Chairman and President


ATTEST:                                PIONEER INVESTMENT MANAGEMENT, INC.


---------------------------------      -------------------------------------
Joseph P. Barri                        David D. Tripple
Secretary                              President
</TABLE>


                                       A-6
<PAGE>

                                    EXHIBIT B


Additional information pertaining to Pioneer

     Pioneer is a wholly owned subsidiary of PGI. As of May 31, 2000, executive
officers and directors of Pioneer beneficially owned an aggregate of 27,356,022
shares of common stock of PGI, representing approximately 14.74% of the
outstanding common stock of PGI. During the period January 1, 2000 through May
31, 2000, there were no transactions in PGI common stock by any officer,
director or trustee of a fund, PGI, Pioneer and/or PFD in an amount equal to or
exceeding 1% of the outstanding common stock of PGI. Messrs. Cogan and Tripple
are trustees and officers of the fund and the directors of Pioneer. Mr. Tripple
is also the president (principal executive officer) of Pioneer. The address of
each of these persons is 60 State Street, Boston, Massachusetts 02109 and the
principal occupation of each of these persons is as an employee of PGI. Please
see Proposal 2 for more detailed biographies of Messrs. Cogan and Tripple.


Services provided to the fund by affiliates of Pioneer

     PSC serves as the fund's transfer agent and shareholder servicing agent.
Under the terms of its contract with the fund, PSC's duties include: (i)
processing sales, redemptions and exchanges of shares of the fund; (ii)
distributing dividends and capital gains to shareholder accounts; and (iii)
maintaining certain account records and responding to routine shareholder
inquires. PSC will continue to provide these services after the approval by
shareholders of the proposed management contract. For its most recently
completed fiscal year, the fund paid a total of $117,268 in transfer agency
fees to PSC.

     The fund has entered into an administration agreement with Pioneer
pursuant to which certain accounting and legal services, which are expenses
payable by the fund under the existing management contract, are performed by
Pioneer and pursuant to which Pioneer is reimbursed for its costs of providing
such services. Pioneer will continue to perform its services to the fund under
the administration agreement after the approval by shareholders of the proposed
management contract. For its most recently completed fiscal year, the fund paid
a total of $31,570 to Pioneer for such services.


Pioneer's portfolio transaction policy

     All orders for the purchase or sale of portfolio securities are placed on
behalf of the fund by Pioneer pursuant to authority contained in the existing
and proposed management contracts. In selecting brokers or dealers, Pioneer
considers factors relating to execution on the best overall terms available,
including, but not limited to, the size and type of the transaction; the nature
and character of the markets of the security to be purchased or sold; the
execution efficiency, settlement capability and financial condition of the
dealer; the dealer's execution services rendered on a continuing basis; and the
reasonableness of any dealer spreads.

     Pioneer may select broker-dealers which provide brokerage and/or research
services to the fund and/or other investment companies or institutional or
other accounts managed


                                       B-1
<PAGE>

by Pioneer. Such research services must be lawful and must provide appropriate
assistance to Pioneer in the performance of its investment decision-making
responsibilities and could include advice concerning the value of securities;
the advisability of investing in, purchasing or selling securities; the
availability of securities or the purchasers or sellers of securities;
providing stock quotation services, credit rating service information and
comparative fund statistics; furnishing analysis, electronic information
services, manuals and reports concerning issuers, industries, securities,
economic factors and trends, portfolio strategy and performance of accounts and
particular investment decisions; and effecting securities transactions and
performing functions incidental thereto (such as clearance and settlement).

     In circumstances where two or more broker-dealers offer comparable prices
and executions, preference may be given to a broker-dealer which has sold
shares of other investment companies managed by Pioneer. This policy does not
imply a commitment to execute all portfolio transactions through all
broker-dealers that sell shares of the fund. In addition, if Pioneer determines
in good faith that the amount of commissions charged by a broker-dealer is
reasonable in relation to the value of the brokerage and research services
provided by such broker-dealer, the fund may pay commissions to such broker-
dealer in an amount greater than the amount another firm may charge. This
information might be useful to Pioneer in providing services to the fund as
well as to other investment companies or accounts managed by Pioneer, although
not all of such research may be useful to the fund generating the commission
credits. Conversely, such information provided to Pioneer by brokers and
dealers through whom other clients of Pioneer effect securities transactions
might be useful to Pioneer in providing services to the fund. The receipt of
such research is not expected to reduce Pioneer's normal independent research
activities; however, it enables Pioneer to avoid the additional expense which
might otherwise be incurred if it were to attempt to develop comparable
information through its own staff.


Similar funds

     Pioneer serves as the investment adviser to each fund in the Pioneer
Family of Funds. The following table identifies other funds in the Pioneer
Family of Funds that have similar investment objectives to the fund and
provides other information regarding the similar funds.

<TABLE>
<CAPTION>
                                                               Management fee rate
                                                              for similar fund as a
                               Net assets of similar fund     percentage of average
        Similar fund             as of December 31, 1999        daily net assets
---------------------------   ----------------------------   ----------------------
<S>                                   <C>                              <C>
Pioneer Bond Fund .........           $173,767,972                     0.50%
</TABLE>

                                       B-2



<PAGE>


PROXY                                                                      PROXY
                             PIONEER INTEREST SHARES
                  PROXY FOR THE ANNUAL MEETING OF SHAREHOLDERS
                          To be held September 11, 2000

I  (we),  having  received  notice  of  the   meeting   and  management's  proxy
statement  therefor,  and revoking  all prior  proxies,  hereby  appoint John F.
Cogan,  Jr., David D. Tripple,  Robert P. Nault and Joseph P. Barri, and each of
them, my (our)  attorneys  (with full power of  substitution in them and each of
them) for and in my (our)  name(s) to attend the Meeting of  Shareholders  of my
(our) fund to be held on Monday,  September 11, 2000, at 2 p.m. (Boston time) at
the offices of Hale and Dorr LLP,  counsel to the fund,  60 State  Street,  26th
Floor,  Boston,  Massachusetts  02109,  and any  adjourned  session or  sessions
thereof,  and there to vote and act upon the  following  matters  (as more fully
described in the  accompanying  proxy statement) in respect of all shares of the
fund which I (we) will be  entitled  to vote or act upon,  with all the powers I
(we) would possess if personally present.

IN THEIR DISCRETION, THE PROXIES ARE AUTHORIZED TO VOTE UPON SUCH OTHER BUSINESS
AS MAY PROPERLY COME BEFORE THE MEETING.

THE  SHARES  REPRESENTED  BY  THIS  PROXY   WILL  BE  VOTED AS  DIRECTED  BY THE
UNDERSIGNED.  IF NO  DIRECTION  IS  GIVEN,  THIS  PROXY  WILL BE  VOTED  FOR THE
PROPOSALS.

                                     NOTE:  In  signing,  please  write  name(s)
                                     exactly  as appearing hereon.  When signing
                                     as  attorney,  executor,  administrator  or
                                     other  fiduciary,  please  give  your  full
                                     title  as  such.  Joint  owners should each
                                     sign personally.

                                     ------------------------------------------
                                     Signature of shareholder(s)

                                     ------------------------------------------
                                     Signature of joint shareholder(s) (if any)

                                     _____________________________________, 2000
                                     Date


<PAGE>


THIS  PROXY  IS  SOLICITED  ON  BEHALF OF THE BOARD OF TRUSTEES OF YOUR FUND AND
SHOULD BE  RETURNED  AS SOON AS POSSIBLE  IN THE  ENVELOPE  PROVIDED.  THE BOARD
RECOMMENDS THAT YOU VOTE IN FAVOR OF THE FOLLOWING:

<TABLE>
<CAPTION>
                                                              FOR              AGAINST                ABSTAIN
<S>                                                           <C>              <C>                    <C>
1.       To approve a new management  contract between
the  fund  and  Pioneer  Investment  Management,  Inc.
("Pioneer"),  the fund's investment adviser.  This new
contract   will  take  effect  only  if  the  proposed
acquisition of The Pioneer Group,  Inc., the parent of
Pioneer, by UniCredito Italiano S.p.A. is consummated.

<CAPTION>
                                                              FOR              WITHHOLD               FOR ALL
                                                              ALL                 ALL                  EXCEPT
                                                                                                 (AS MARKED BELOW)
<S>                                                           <C>              <C>               <C>
2.       To elect trustees.  The nominees for trustees
are:

01 J.F. Cogan, Jr.           02 M.K. Bush
03 Dr. R.H. Egdahl           04 M.B.W. Graham
05 M.A. Piret                06 D.D. Tripple
07 S.K. West                 08 J. Winthrop

TO WITHHOLD AUTHORITY TO VOTE FOR ONE OR MORE OF THE NOMINEES, WRITE THE NAME(S)
OF THE NOMINEE(S) ON THE LINE BELOW:


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

<CAPTION>
                                                              FOR              AGAINST                ABSTAIN
<S>                                                           <C>              <C>                    <C>
3. To ratify the selection of Arthur Andersen LLP as the fund's independent
public accountants for the fiscal year ending December 31, 2000.
</TABLE>


<PAGE>


 [logo          PIONEER INTEREST SHARES
PIONEER]
                60 State Street
                Boston, MA 02109-1820


                July 2000


VOITNG YOUR     Dear Shareowner,
SHARES BY MAIL
IS QUICK AND    I am writing with some exciting news. As you may know, on
EASY. EVERY-    May 15, 2000, The Pioneer Group, Inc. and UniCredito Italiano
THING YOU NEED  S.p.A. announced an agreement under which UniCredito is expected
IS ENCLOSED.    to purchase all of the outstanding stock of Pioneer Group. In
                connection with this transaction, the annual meeting for
                shareowners of your fund will be held on September 11, 2000 and
                includes a special proxy item.

                The primary purpose of the meeting is to permit shareowners to
                consider a new management contract with Pioneer Investment
                Management, Inc., the fund's current investment adviser, as
                shareowner approval of the new management contract is required
                by federal securities laws in connection with the sale. The new
                management contract will take effect following the sale of
                Pioneer Group to UniCredito. THIS PROPOSAL DOES NOT REQUEST AN
                INCREASE IN THE RATE OF THE FUND'S MANAGEMENT FEES.  As a
                shareowner in  Pioneer Interest Shares, you have the opportunity
                to voice your opinion on proposals relating to the sale.

                This package contains information about the proposals, along
                with the proxy card for you to use when voting by mail. Please
                take a moment to read the enclosed materials before casting your
                vote.

THE BOARD OF    Each of the proposals has been reviewed by your fund's Board of
TRUSTEES        Trustees, whose primary role is to protect your interests as a
RECOMMENDS THAT shareowner. In the Trustees' opinion, the proposals are fair and
YOU VOTE FOR    reasonable. The Trustees recommend that you vote FOR each
EACH PROPOSAL.  proposal.

                HERE IS WHAT A FOR VOTE MEANS FOR EACH OF THE PROPOSALS BEING
                CONSIDERED.

                PROPOSAL 1:
                APPROVAL OF A NEW MANAGEMENT CONTRACT BETWEEN YOUR FUND AND
                PIONEER INVESTMENT MANAGEMENT, INC. The new contract will take
                effect only if the proposed acquisition of The Pioneer Group,
                Inc., the parent of your fund's investment adviser, Pioneer
                Investment Management, Inc., by UniCredito Italiano S.p.A. is
                consummated.

                PROPOSAL 2:
PLEASE VOTE!    ELECT EIGHT TRUSTEES TO THE BOARD. The Trustees supervise your
YOUR VOTE IS    fund's activities and review contractual arrangements with
EXTREMELY       companies that provide services to the fund. All of the nominees
IMPORTANT, NO   were previously elected by shareowners. The proxy statement
MATTER HOW MANY includes detailed information about all nominees.
SHARES YOU OWN.
                PROPOSAL 3:
                RATIFY THE SELECTION OF ARTHUR ANDERSEN LLP AS THE FUND'S
                INDEPENDENT PUBLIC ACCOUNTANTS FOR THE FISCAL YEAR ENDING
                DECEMBER 31, 2000.

                Cast your vote by completing and signing the proxy card enclosed
                in this package. Please mail your completed and signed card as
                quickly as possible, using the postage-paid envelope provided.
                Thank you for your prompt response.

                Sincerely,


                /s/ John F. Cogan, Jr.
                John F. Cogan, Jr.
                Chairman and President

                                                                    8528-00-0600




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