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)).
[ ]      Definitive Proxy Statement.
[X]      Definitive Additional Materials.
[ ]      Soliciting Material Pursuant to sec. 240.14a-12.

   Pioneer Bond Fund                              Pioneer Series Trust VII
   Pioneer High Yield Fund                        Pioneer Strategic Income Fund
   Pioneer Series Trust I                         Pioneer Tax Free Income Fund
   Pioneer Series Trust III                       Pioneer Value Fund
   Pioneer Series Trust IV


               (Name of Registrant(s) as Specified in its Charter)

                                       N/A

           ___________________________________________________________
    (Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):
[X]     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:

        2)       Aggregate number of securities to which transaction applies:

        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):

        4)       Proposed maximum aggregate value of transaction:

        5)       Total fee paid:

[ ]     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:

        2)       Form, Schedule or Registration Statement No.:

        3)       Filing Party:

        4)       Date Filed:


IMPORTANT REMINDER: PIONEER FUNDS
SPECIAL MEETING OF SHAREHOLDERS ADJOURNED UNTIL JUNE 19, 2008

We previously sent you proxy information relating to a special meeting of
shareholders of the Pioneer Funds. The meeting for one or more of the funds in
which you hold shares was adjourned for certain proposals until June 19, 2008 at
2 p.m., Eastern Time. Your vote for this important meeting has not yet been
received.

We encourage you to utilize one of the following options today to record your
vote:

- ->To vote by TouchTone telephone, call 1-866-241-6192.

- ->To vote by Internet, log into www.proxy-direct.com/pioneer.
     You will need your control number and security code found on your proxy
     card(s) to vote by Internet or TouchTone telephone.

- ->To vote by mail, sign and date the proxy card(s) and return it/them in the
enclosed postage paid reply envelope.

Remember, your vote counts. Please vote today.

If you have any questions regarding the proposals, please call Computershare
Fund Services, your Fund's proxy agent, at 1-866-526-4104. Representatives are
available Monday through Friday between the hours of 9:00 a.m. and 11:00 p.m.,
and Saturday from Noon to 6:00 p.m., Eastern Time.

Your vote will help reduce the need for additional solicitation efforts or
additional meeting adjournments.

As the adjournment date approaches, certain shareholders of each Fund may
receive a telephone call from a representative of Computershare Fund Services if
their votes have not yet been received.

Thank you for your prompt attention to this matter.




Securities offered through Pioneer Funds Distributor, Inc., 60 State Street,
Boston, MA. 02109.
Underwriter of Pioneer mutual funds, Member SIPC

(C)2008 Pioneer Investments. o pioneerinvestments.com


IMPORTANT REMINDER: PIONEER FUNDS

SPECIAL MEETING OF SHAREHOLDERS ADJOURNED UNTIL JUNE 19, 2008

We previously sent you proxy information relating to a special meeting of
shareholders of the Pioneer Funds. The meeting for one or more of the funds in
which you hold shares was adjourned for certain proposals until June 19, 2008 at
2 p.m., Eastern Time. Your vote for this important meeting has not yet been
received.

We encourage you to utilize one of the following options today to record your
vote:

- ->To vote by TouchTone telephone, call 1-800-454-8683.

- ->To vote by Internet, go to www.proxyvote.com.
     You will need your control number found on your voting instruction form to
     vote by Internet or TouchTone telephone.

- ->To vote by mail, sign and date your voting instruction form(s) and return
it/them in the enclosed postage-paid envelope.

Remember, your vote counts. Please vote today.

If you have any questions regarding the proposals, please call Computershare
Fund Services, your Fund's proxy agent, at 1-866-526-4104. Representatives are
available Monday through Friday between the hours of 9:00 a.m. and 11:00 p.m.,
and Saturday from Noon to 6:00 p.m., Eastern Time.

Your vote will help reduce the need for additional solicitation efforts or
additional meeting adjournments.

As the adjournment date approaches, certain shareholders may receive a telephone
call from a representative of Computershare Fund Services if their votes have
not yet been received.

Thank you for your prompt attention to this matter.




Securities offered through Pioneer Funds Distributor, Inc., 60 State Street,
Boston, MA. 02109.
Underwriter of Pioneer mutual funds, Member SIPC

(C)2008 Pioneer Investments. o pioneerinvestments.com