[LETTERHEAD OF J.P. MORGAN INVESTOR SERVICES CO.

73 TREMONT STREET, BOSTON, MASSACHUSETTS 02108]

October 3, 2008

FILED VIA EDGAR

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

 

Attention:    Office of Filings, Information & Consumer Services
Re:    ProShares Trust
   File Nos. 333-89822 and 811-21114
   Rule 497(j) Filing

Ladies and Gentlemen:

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, I certify that the Prospectus and Statement of Additional Information for the ProShares Trust that would have been filed under paragraph (c) of Rule 497 do not differ from those contained in Post-Effective Amendment No. 10 to the Registration Statement on Form N-1A which was filed electronically on September 30, 2008.

Please direct any questions or comments relating to this certification to me at 617-557-8826.

 

Very truly yours,

/s/ Gregory Pickard

Gregory Pickard

Assistant Secretary

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