Exhibit (11)

                                February 13, 2009

Pioneer Bond Fund
60 State Street
Boston, Massachusetts 02109

Ladies and Gentlemen:

     We have acted as counsel to Pioneer Bond Fund, a Delaware statutory trust,
in its individual capacity (the "Trust"), and on behalf of its series Pioneer
Bond Fund (the "Surviving Fund"), in connection with the Trust's Registration
Statement on Form N-14 to be filed with the Securities and Exchange Commission
on or about February 13, 2009 (the "Registration Statement"), with respect to
the Surviving Fund's Class A shares and Class Y shares (the "Shares") of
beneficial interest to be issued in exchange for the common shares of Regions
Morgan Keegan Select Fixed Income Fund, a series of Regions Morgan Keegan Select
Funds, a Massachusetts business trust, as described in the Registration
Statement (the "Merger"). You have requested that we deliver this opinion to you
in connection with the Trust's filing of the Registration Statement.

     In connection with the furnishing of this opinion, we have examined the
following documents:

     (a) a certificate of the Secretary of the State of Delaware as to the
existence of the Trust;

     (b) a copy, certified by the Secretary of the State of Delaware, of the
Trust's Certificate of Trust dated January 5, 1999 filed with the Secretary of
State (the "Certificate of Trust");

     (c) a certificate executed by the Assistant Secretary of the Trust,
certifying as to, and attaching copies of, the Trust's Agreement and Declaration
of Trust (the "Declaration"), the Trust's By-Laws (the "By-Laws"), and the
resolutions adopted by the Trustees of the Trust at a meeting held on August 29,
2008, authorizing the Merger and the issuance of the Shares on behalf of the
Surviving Fund (the "Resolutions");

     (d) a printer's proof, received on February 12, 2009, of the Registration
Statement; and

     (e) a copy of the form of Agreement and Plan of Reorganization to be
entered into by the Surviving Fund (the "Agreement and Plan of Reorganization").

     In such examination, we have assumed the genuineness of all signatures, the
conformity to the originals of all of the documents reviewed by us as copies,
including conformed copies, the authenticity and completeness of all original
documents reviewed by us in original or copy form and the legal competence of
each individual executing any document. We have assumed that the Registration
Statement as filed with the Securities and Exchange Commission will be in
substantially the form of the printer's proof referred to in paragraph (d)
above, and that the Agreement and Plan of Reorganization will be duly completed,
executed and delivered by the parties thereto in substantially the form of the
copy referred to in paragraph (e) above. We have also assumed for the purposes
of this opinion that the Declaration, the Certificate of Trust, the Resolutions
and the Agreement and Plan of Reorganization will not have been amended,
modified or withdrawn and will be in full force and effect on the date of
issuance of such Shares.

     This opinion is based entirely on our review of the documents listed above
and such other documents as we have deemed necessary or appropriate for the
purposes of this opinion and such investigation of law as we have deemed
necessary or appropriate. We have made no other review or investigation of any
kind whatsoever, and we have assumed, without independent inquiry, the accuracy
of the information set forth in such documents.

     This opinion is limited solely to the Delaware Statutory Trust Act (which
for this purpose includes applicable provisions of the Delaware Constitution and
reported judicial decisions interpreting these laws) to the extent that the same
may apply to or govern the transactions referred to herein, and we express no
opinion with respect to the laws of any other jurisdiction or to any other laws
of the State of Delaware. Further, we express no opinion as to any state or
federal securities laws, including the securities laws of the State of Delaware.
No opinion is given herein as to the choice of law or internal substantive rules
of law which any tribunal may apply to such transaction. In addition, to the
extent that the Declaration or the By-Laws refer to, incorporate or require
compliance with, the Investment Company Act of 1940, as amended, or any other
law or regulation applicable to the Trust, except for the Delaware Statutory
Trust Act, as aforesaid, we have assumed compliance by the Trust with such Act
and such other laws and regulations.

     Our opinion below, as it relates to the nonassessability of the shares of
the Trust, is qualified to the extent that any shareholder is, was or may become
a named Trustee of the Trust.


     We understand that all of the foregoing assumptions and limitations are
acceptable to you.

     Based upon and subject to the foregoing, please be advised that it is our
opinion that the Shares, when issued and sold in accordance with the Declaration
and the Resolutions and for the consideration described in the Agreement and
Plan of Reorganization, will be validly issued, fully paid and nonassessable.

     This opinion is given as of the date hereof and we assume no obligation to
update this opinion to reflect any changes in law or any other facts or
circumstances which may hereafter come to our attention. We hereby consent to
the filing of this opinion as an exhibit to the Registration Statement.

                                 Very truly yours,

                                 BINGHAM McCUTCHEN LLP