BINGHAM MCCUTCHEN Bingham McCutchen LLP One Federal Street Boston, MA 02110-1726 T 617.951.8000 F 617.951.8736 March 30, 2009 VIA EDGAR - --------- Dominic Minore Securities and Exchange Commission Division of Investment Management 100 F Street, NE Washington, D.C. 20549 Re: The Registrants Listed on the Attached Appendix A (each, a "Registrant") Registration Statement on Form N-14 Dear Mr. Minore: On behalf of each of the Registrants, we are filing this letter as a supplement to the response letter filed by the Registrants earlier today to respond in writing to the Staff's additional comments on the Registration Statement on Form N-14 relating to the proposed reorganization of a series of Regions Morgan Keegan Select Funds into a series of the Registrant, as set forth on Appendix B. The Staff's additional comments were conveyed to us as representatives of the Registrants by telephone on March 27, 2009. The response letter filed earlier today responded to each of the Staff's additional comments, with the exception of the comment below. Please note that all capitalized terms used but not defined herein shall have the meanings ascribed to such terms in the response letter filed by the Registrants earlier today. Comment 11. Concerning the disclosure under "Purchase of Certain Securities by Regions," the Staff had the following additional comments: (b) clarify how it is possible to redeem in-kind a proportionate share of the Whistlejacket Security from the Program if it is a single promissory note. Response: As noted in the response to comment 11(a) in the response letter filed by the Registrants earlier today, when the Securities Lending Funds exit the Program, they will redeem their interests in the BNY Fund for cash, except in respect of that portion of the net asset value redeemed that represents the Whistlejacket Security and the Lehman Securities. These assets will be redeemed for in-kind proceeds consisting of a proportionate share of the Whistlejacket Security and the Lehman Securities pursuant to the terms of the Whistlejacket Support and the Lehman Support. In respect of each Security, each Securities Lending Fund will receive its proportionate interest in each Security through book-entry transfer from the BNY Fund to each Fund's cash collateral account at the Bank of New York Mellon (the "Bank"). These interests will be non-tradable lots that must remain in an account with the Bank. When Regions purchases the Securities from each of the Securities Lending Funds (as described in the Registrants' earlier response letter), the transfer of ownership will be through a book-entry transfer from each account of a Securities Lending Fund to an account controlled by Regions at the Bank. * * * Please call the undersigned at (617) 951-8567 with any questions. Sincerely, /s/ Paul B. Raymond Paul B. Raymond Appendix A Registrant File Nos. - ---------- --------- Pioneer Bond Fund 811-02864; 333-157342 Pioneer Fund 811-01466; 333-157321 Pioneer Mid Cap Value Fund 811-06106; 333-157312 Pioneer Money Market Trust 811-05099; 333-157315 Pioneer Series Trust I 811-21425; 333-157353 Pioneer Series Trust III 811-21664; 333-157336 Pioneer Series Trust IV 811-21781; 333-157350 Pioneer Short Term Income Fund 811-21558; 333-157340 Appendix B Series of Regions Morgan Keegan Select Funds Corresponding Series of a Registrant - -------------------------------------------- ------------------------------------ Regions Morgan Keegan Select Mid Cap Growth Fund Pioneer Select Mid Cap Growth Fund (a series of Pioneer Series Trust I) Regions Morgan Keegan Select Growth Fund Pioneer Growth Fund (a series of Pioneer Series Trust I) Regions Morgan Keegan Select Core Equity Fund Pioneer Fund (the sole series of Pioneer Fund) Regions Morgan Keegan Select Mid Cap Value Fund Pioneer Mid Cap Value Fund (the sole series of Pioneer Mid Cap Value Fund) Regions Morgan Keegan Select Value Fund Pioneer Cullen Value Fund (a series of Pioneer Series Trust III) Regions Morgan Keegan Select Balanced Fund Pioneer Classic Balanced Fund (a series of Pioneer Series Trust IV) Regions Morgan Keegan Select Fixed Income Fund Pioneer Bond Fund (the sole series of Pioneer Bond Fund) Regions Morgan Keegan Select Limited Maturity Fixed Income Fund Pioneer Short Term Income Fund (the sole series of Pioneer Short Term Income Fund) Regions Morgan Keegan Select Intermediate Tax Exempt Bond Fund Pioneer Intermediate Tax Free Income Fund (a series of Pioneer Series Trust I) Regions Morgan Keegan Select Treasury Money Market Fund Pioneer Treasury Reserves Fund (a series of Pioneer Series Trust IV) Regions Morgan Keegan Select Money Market Fund Pioneer Cash Reserves Fund (a series of Pioneer Money Market Trust)