BINGHAM McCUTCHEN LLP
                              ONE FEDERAL STREET
                          BOSTON, MASSACHUSETTS 02110

                                       December 6, 2013

VIA EDGAR

Securities and Exchange Commission
Division of Investment Management
100 F Street, NE
Washington, D.C. 20549

Re: Pioneer Series Trust V (File Nos. 333-129005; 811-21823)
    Registration Statement on Form N-1A

Ladies and Gentlemen:

   This letter is to respond to comments we received from Mr. Dominic Minore of
the Staff of the Division of Investment Management of the Securities and
Exchange Commission (the "Commission") regarding Post-Effective Amendment
No. 16 to the Registration Statement on Form N-1A of Pioneer Series Trust V
(the "Registrant") relating to Pioneer Long/Short Global Bond Fund and Pioneer
Long/Short Opportunistic Credit Fund. Following are the Staff's comments and
the Registrant's responses thereto:

I. General Comment

1.   Comment: The Staff asked that the Registrant provide a letter to the
              Commission that includes certain "Tandy" acknowledgments with
              the Registrant's response to the Staff's comments.

    Response: A Tandy representation letter executed in connection with the
              filing of this response is attached hereto as Exhibit A.

II. Comments Applicable to Each Fund's Prospectus

A. Fees and Expenses

1.   Comment: The Staff requested that the Registrant confirm that each Fund
              does not intend to invest in other investment companies to the
              extent that Acquired Fund Fees and Expenses will represent 0.01%
              or more of the Fund's expenses during the next twelve months,
              and that estimated expenses related to investments in other
              investment companies are reflected in the Other Expenses line
              item.

    Response: The Registrant confirms that each Fund does not intend to invest
              in other investment companies to the extent that Acquired Fund
              Fees and Expenses will represent 0.01% or more of the Fund's
              expenses during the next twelve months, and that estimated
              expenses related to investments in other investment companies
              are reflected in the Other Expenses line item.



2.  Comment:  The Staff requested that the Registrant confirm in its response
              that the adviser has no ability to recoup any amounts waived or
              expenses reimbursed under the contractual expense limitation
              arrangement discussed in Footnote 2 to the Fee Table for each
              Fund.

    Response: The Registrant confirms that the adviser has no ability to
              recoup any amounts waived or expenses reimbursed under the
              contractual expense limitation arrangement discussed in Footnote
              2 to the Fee Table for each Fund.

3.  Comment:  The Staff noted that the Registrant states that the contractual
              expense limitation arrangement for each Fund may be terminated
              for a class of a Fund only by agreement of the adviser and the
              Board of Trustees. The Staff requested that the Registrant
              confirm in its response that the Board of Trustees does not
              intend to terminate either arrangement during the next twelve
              months.

    Response: The Registrant confirms that it has not been informed that the
              Board of Trustees intends to terminate the contractual expense
              limitation arrangement with respect to either Fund during the
              next twelve months.

B. Principal Investment Strategies

1.  The Staff noted that the Registrant states that, normally, each Fund
    invests at least 80% of its net assets (plus the amount of borrowings,
    if any, for investment purposes) in debt instruments and related
    derivative instruments.

a.  Comment:   The Staff requested that the Registrant revise "related
               derivative instruments" to state "derivative instruments that
               have economic characteristics similar to debt instruments."

    Response:  The Registrant has revised the disclosure with respect to the
               Staff's comment.

b.  Comment:   The Staff noted that, with respect to each Fund, the
               Registrant should confirm that the Fund's 80% investment
               policy is a fundamental policy or disclose that the Fund has
               adopted a policy to provide the Fund's shareholders with at
               least 60 days prior notice any change in the policy, in
               accordance with Rule 35d-1.

    Response:  The Registrant has added disclosure to confirm that each
               Fund's 80% policy is not a fundamental policy and that each
               Fund has adopted a policy to provide shareholders with at
               least 60 days prior notice any change in the policy.

2.  Comment:   The Staff noted that the Registrant states that each Fund may
               invest in mortgage-related or mortgage-backed securities. The
               Staff requested that the Registrant confirm in its response
               that neither Fund intends to invest in synthetic CDOs or
               similar types of securities, or specifically disclose such
               investments in each Fund's investment strategy disclosure.

    Response:  The Registrant has added disclosure to address the Staff's
               comment.

3.  The Staff noted that under normal circumstances, the average portfolio
    duration of Pioneer Long/Short Global Bond Fund will be between negative
    three years and positive three years, and the average portfolio duration
    of Pioneer Opportunistic Long/Short Credit Fund will be between negative
    four years and positive four years.

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a.  Comment:   The Staff suggested that the Registrant include a brief
               illustration of duration, such as the expected impact of a 1%
               increase in interest rates on the Fund's portfolio.

    Response:  The Registrant has added disclosure to address the Staff's
               comment.

b.  Comment:   The Staff requested that the Registrant clarify how the
               adviser will determine where to position each Fund's average
               portfolio duration along the indicated negative three/four
               year and positive three/four year spectrum.

    Response:  The Registrant has added disclosure to address the Staff's
               comment.

4.  Comment:   The Staff noted that each Fund may invest in REITs. The Staff
               noted that if investment in REITs is a principal investment
               strategy, the Registrant should include a separate risk
               factor related to investment in REITs.

    Response:  The Registrant has revised the disclosure to address the
               Staff's comment.

5.  The Staff noted that the Registrant states that each Fund may invest
    substantially in non-U.S. securities, including securities of emerging
    market issuers.

a.  Comment:   The Staff requested that the Registrant specify the maximum
               percentage of Pioneer Opportunistic Long/Short Credit Fund's
               assets that can be invested in foreign issuers generally and
               in emerging market issuers specifically, or disclose that
               there is no limit on such investments.

    Response:  The Registrant has revised the disclosure to address the
               Staff's comment.

b.  Comment:   The Staff requested that the Registrant disclose the maximum
               percentage of Pioneer Long/Short Global Bond Fund's assets
               that can be invested in emerging markets securities or
               disclose that there is no limit on such investments.

    Response:  The Registrant has revised the disclosure to address the
               Staff's comment.

6.  Comment:   The Staff requested that the Registrant include an
               undertaking in its response to the Staff's comments that, to
               the extent that either Fund's investments in any one region
               or country represent a material percentage of the Fund's
               assets, the Registrant will supplement such Fund's prospectus
               to disclose the specific risks of investing in such region or
               country.

    Response:  The Registrant undertakes that, to the extent that either
               Fund's investments in any one region or country represent a
               material percentage of the Fund's assets, the Registrant will
               supplement such Fund's prospectus to disclose the specific
               risks of investing in such region or country.

7.  Comment:   The Staff requested that the Registrant add disclosure to
               identify the minimum number of countries in which Pioneer
               Long/Short Global Bond Fund will invest. The Staff noted that
               if such minimum number is less than three, the Registrant
               should explain why that would be appropriate for a fund that
               includes "global" in its name.

    Response:  The Registrant has added disclosure to address the Staff's
               comment.

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8.  Comment:   The Staff requested that the Registrant confirm in its
               response to the Staff's comments that the disclosure in the
               prospectus regarding each Fund's use of derivatives addresses
               the observations and concerns noted in the letter from Barry
               D. Miller, Associate Director, Division of Investment
               Management, SEC to Karrie McMillan, General Counsel, ICI
               (July 30, 2010) regarding derivatives related disclosure by
               investment companies, particularly as such observations
               relate to tailored disclosure regarding a fund's use of
               derivatives. Alternatively, the Staff suggested that the
               Registrant further tailor the disclosure as to how each Fund
               intends to use specific derivative instruments in
               implementing its principal investment strategies.

    Response:  The Registrant confirms that the disclosure in each Fund's
               prospectus regarding the Fund's use of derivatives addresses
               the observations and concerns noted in the letter from the
               Division of Investment Management to the Investment Company
               Institute regarding derivatives-related disclosure by
               investment companies.

9.  Comment:   The Staff noted that the Registrant states that each Fund may
               engage in short sales "to enhance total return," and
               requested that the Registrant clarify the extent to which
               each Fund intends to use short sales for speculative purposes.

    Response:  The Registrant has revised the disclosure to address the
               Staff's comment.

C. Principal Risks


1.  Comment:   The Staff requested that the Registrant expand the risk
               disclosure regarding derivatives to address specifically the
               types of derivatives each Fund intends to use and the risks
               applicable to such instruments.

    Response:  The Registrant has revised the disclosure with respect to the
               Staff's comment.

2.  Comment:   The Staff noted that each Fund may invest in below investment
               grade securities, including securities in default. The Staff
               requested that the risks of investing in securities in
               default be addressed specifically in the junk bond risk
               factor.

    Response:  The Registrant has revised the disclosure to address the
               Staff's comment.

3.  Comment:   The Staff noted that each Fund's investments may include
               instruments that allow for balloon payments or negative
               amortization payments, and requested that the Registrant
               include separate risk factors with respect to such
               instruments.

    Response:  The Registrant has revised the disclosure to address the
               Staff's comment.

4.  Comment:   The Staff noted that the Registrant states under "Extension
               Risk" that during periods of rising interest rates, the
               average life of certain types of securities may be extended
               because of slower than expected principal payments. This may
               lock in a below market interest rate, increase the security's
               duration and reduce the value of the security. The Staff
               requested that the Registrant consider replacing the word
               "duration" with "actual maturity" or "estimated maturity" to
               avoid inconsistency with the disclosure regarding duration in
               each Fund's principal investment strategy section.

    Response:  The Registrant respectfully submits that "duration" is the
               correct term to use in the disclosure referenced by the
               Staff, but notes that it has revised the disclosure to make it

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                  more consistent with the disclosure
                  regarding duration in each Fund's principal
                  investment strategy section.

D. More on each Fund's Principal Investment Strategies

1.  Comment:   The Staff requested that the Registrant include the word
               "junk" in the heading for the "Below Investment Grade
               Securities" paragraph.

    Response:  The Registrant has revised the disclosure to address the
               Staff's comment.

E. Management Fee

1.  Comment:   The Staff requested that the Registrant revise the disclosure
               regarding each Fund's management fee schedule to clarify that
               the word "assets" in the description of the breakpoint in
               each Fund's fee schedule is intended to mean "average daily
               net assets."

    Response:  The Registrant has revised the disclosure to address the
               Staff's comment.

   Please call the undersigned at (617) 951-8458 or Toby Serkin at
(617) 951-8760 with any questions.

                                                  Sincerely,

                                                  /s/ Jeremy Kantrowitz

                                                  Jeremy Kantrowitz

cc:  Terrence J. Cullen
     Christopher J. Kelley
     Roger P. Joseph
     Toby R. Serkin

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