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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 14A
Proxy Statement Pursuant to Section 14(a) of the Securities
Exchange Act of 1934 (Amendment No. )
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))
[ ] Definitive Proxy Statement
[x] Definitive Additional Materials
[ ] Soliciting Material Pursuant to ss.240.14a-12
Pioneer Bond Fund
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(Name of Registrant as Specified In Its Charter)
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(Name of Person(s) Filing Proxy Statement, if other than the Registrant)
Payment of Filing Fee (Check the appropriate box):
[ ] No fee required.
[ ] Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
1) Title of each class of securities to which transaction applies:
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2) Aggregate number of securities to which transaction applies:
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3) Per unit price or other underlying value of transaction computed
pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
filing fee is calculated and state how it was determined):
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4) Proposed maximum aggregate value of transaction:
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5) Total fee paid:
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Persons who are to respond to the collection of information
contained in this form are not required to respond unless the
form displays a currently valid OMB control number.
SEC 1913(04-05)
[ ] Fee paid previously with preliminary materials.
[ ] Check box if any part of the fee is offset as provided by Exchange
Act Rule 0-11(a)(2) and identify the filing for which the offsetting
fee was paid previously. Identify the previous filing by registration
statement number, or the Form or Schedule and the date of its filing.
1) Amount Previously Paid:
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2) Form, Schedule or Registration Statement No.:
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3) Filing Party:
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4) Date Filed:
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[LOGO] PIONEER
Investments(R)
IMPORTANT INFORMATION REGARDING
YOUR INVESTMENT
PIONEER INTEREST SHARES
September 24, 2007
Dear Shareholder:
As you may know, the Board of Trustees of Pioneer Interest Shares (NYSE: MUO)
has called a Special Meeting of Shareholders to be held on October 16, 2007. At
this meeting, shareholders will be asked to approve the reorganization of your
Fund into Pioneer Bond Fund, an open-end fund with the same investment adviser,
Pioneer Investment Management, Inc., and similar investment strategies.
The Trustees believe that reorganizing your Fund into Pioneer Bond Fund offers
shareholders potential benefits and therefore recommends that you vote FOR this
proposal. Among other benefits, reorganization into an open-end fund would allow
for the future purchase or redemption of shares at net asset value, effectively
eliminating the discount at which shares of your Fund historically have traded.
Please refer to the combined proxy statement and prospectus dated August 22,
2007 for more information.
IF YOU HAVE NOT YET VOTED AND ARE NOT PLANNING TO ATTEND THE SPECIAL MEETING,
PLEASE TAKE A MOMENT NOW TO CAST YOUR VOTE SO THAT YOUR SHARES MAY BE
REPRESENTED AT THE SPECIAL MEETING.
To vote your shares, the following voting options have been set up for your
convenience:
[Graphic] 1. Vote by Touch-tone Phone. Simply dial the toll-free number
located on the enclosed proxy card. Please be sure to have the
control number listed on the proxy card available at the time
of the call.
[Graphic] 2. Vote Through the Internet. You may cast your vote using the
Internet by logging onto the website listed on the enclosed
proxy card. Once there, follow the instructions on the
website. Please have your control number listed on your proxy
card available at the time you log on.
[Graphic] 3. Vote by Mail. You may cast your vote by signing, dating and
mailing the enclosed proxy ballot(s) in the postage-prepaid
return envelope provided.
PLEASE NOTE: If you have already voted your shares there is no need to vote
again. All votes received to date will be presented and voted at the special
meeting as you indicated.
Thank you for your assistance with this important matter.
On Behalf of the Board of Trustees
* * * * *
Your Fund has filed a combined proxy statement and prospectus with the
Securities and Exchange Commission regarding the matters to be acted upon at the
October 16, 2007 Special Meeting. Shareholders are urged to carefully review the
proxy statement/prospectus because it contains important information. This
letter may be deemed to be solicitation material with respect to the proxy
statement/prospectus. Investors may obtain a free copy of the proxy
statement/prospectus at the Securities and Exchange Commission's website at
www.sec.gov. Investors also may obtain free copies of the proxy
statement/prospectus by calling (800) 591-8238.