As filed with the U.S. Securities and Exchange Commission

on March 15, 2012

Securities Act File No. 33-92982

Investment Company Act File No. 811-9054

U.S. SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

(Check appropriate box or boxes)

Credit Suisse Opportunity Funds

(Exact name of registrant as specified in charter)

Registrant’s Telephone Number, Including Area Code: (212) 325-2000

Karen Regan

Credit Suisse Opportunity Funds

Eleven Madison Avenue

New York, New York 10010

(Name and Address of Agent for Service)

Copy to:

Rose F. DiMartino, Esq.
Willkie Farr & Gallagher LLP
787 Seventh Avenue
New York, New York 10019-6099

Approximate date of proposed public offering:

It is proposed that this filing will become effective (check appropriate box)

If appropriate, check the following box:

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirement for effectiveness of this registration statement under rule 485(b) under the Securities Act and has duly caused this Amendment to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and the State of New York, on the 15th day of March 2012.

Pursuant to the requirements of the Securities Act of 1933, as amended, this Amendment has been signed below by the following persons in the capacities and on the date indicated:

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Credit Suisse Cayman Liquid Alternative Fund, Ltd certifies that it meets all of the requirements for effectiveness of this registration statement under rule 485(b) under the Securities Act and has duly caused this Registration Statement of Credit Suisse Opportunity Funds, on behalf of its series, Credit Suisse Liquid Alternative Fund, with respect only to information that specifically relates to Credit Suisse Cayman Liquid Alternative Fund, Ltd, to be signed on its behalf by the undersigned, thereunto duly authorized, in the city of New York, and State of New York, on the 15th day of March, 2012.

This Registration Statement of Credit Suisse Opportunity Funds, on behalf of its series, Credit Suisse Liquid Alternative Fund, with respect only to information that specifically relates to Credit Suisse Cayman Liquid Alternative Fund, Ltd, has been signed below by the following persons in the capacities on the dates indicated:

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