POWER OF ATTORNEY

     I, the undersigned Trustee of Pioneer Bond Fund (the "Fund"), hereby
constitute and appoint John F. Cogan, Jr., Dorothy E. Bourassa, Daniel K.
Kingsbury and Vincent Nave, and each of them acting singly, to be my true,
sufficient and lawful attorneys, with full power to each of them to sign for
me, in my name: (i) the Fund's Registration Statement on Form N-14, and any and
all amendments thereto, with respect to the proposed reorganization of Pioneer
Interest Shares into the Fund, and (ii) any and all other documents and papers
relating to such reorganization, and generally to do all such things in my name
and on behalf of me in the capacities indicated to enable the Fund to comply
with the Investment Company Act of 1940, as amended, and the Securities Act of
1933, as amended, and thereunder, hereby ratifying and confirming my signature
as it may be signed by said attorneys or each of them to the Registration
Statement and amendments to said Registration Statement.

     IN WITNESS WHEREOF, I have hereunder set my hand on this 5th day of May,
2007.


                                 
/s/ David R. Bock                   /s/ Thomas J. Perna
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David R. Bock                       Thomas J. Perna


/s/ Mary K. Bush                    /s/ Marguerite A. Piret
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Mary K. Bush                        Marguerite A. Piret


/s/ John F. Cogan, Jr.              /s/ John Winthrop
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John F. Cogan, Jr.                  John Winthrop


/s/ Margaret B.W. Graham
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Margaret B.W. Graham