Bond follow-up
Pioneer Bond Fund
60 State Street
Boston, MA  02109

URGENT
PLEASE VOTE YOUR SHARES TODAY

April 1999

Dear Fellow Shareowner,

Not too long ago we sent you a proxy card and materials for Pioneer Bond Fund
(the Fund) explaining the proposals up for a vote at the May 4, 1999 shareowner
meeting.

We need you to cast your vote!
Voting now will help save money. If a majority of shareowners have not voted
before May 4, we must delay the meeting and begin the proposal and voting
process all over again. This would be extremely costly.

If you have not already completed and returned the proxy card included in our
earlier package, please take a moment now to complete the enclosed proxy card
and mail it to us in the postage-paid envelope provided.

The proposals in the Proxy Statement have been reviewed by the Fund's Board of
Trustees, whose primary role is to protect your interests as a shareowner. In
the Trustees' opinion, the proposals are fair and reasonable. The Trustees
recommend that you vote FOR each proposal. For your easy reference, on the back
of this page is a summary of what a FOR vote would mean for each proposal.

Please vote! Your vote is extremely important, no matter how many shares you
own.

Please feel free to call us at 1-800-225-6292 if you have any questions about
the proposals or the process for voting your shares. Thank you for your prompt
response.

Sincerely,

John F. Cogan, Jr.
Chairman and President





[back page]

Here is what a FOR vote means for each of the proposals being considered.

Proposal 1:
Elect nine Trustees to the Board. The Trustees supervise the Fund's activities
and review contractual arrangements with companies that provide services to the
Fund. All of the nominees currently serve as Trustees.

Proposal 2:
Allow the Fund to be reorganized as a Delaware business trust. Currently,
Pioneer Bond Fund is registered as a Massachusetts business trust. As a Delaware
business trust, the Fund and its shareowners could benefit from a decreased
possibility of shareowner and trustee liability and various potential operating
efficiencies described in the Proxy Statement.

Proposals 3(a) through 3(l):
Amend the investment objective and modernize certain investment policies and
restrictions to conform to current standards in the mutual fund industry. The
Trustees believe the proposed changes are appropriate and necessary to provide
future flexibility in the Fund's investment operations. For details on each of
the proposed changes, we encourage you to review the Proxy Statement.


Please vote! Your vote is extremely important, no matter how many shares you
own.


0399-6318