January 11, 2006


Willkie Farr & Gallagher LLP
787 Seventh Avenue
New York, New York  10019

Re:      Credit Suisse Trust
         Post-Effective Amendment on Form N-1A

Ladies and Gentlemen:

You have requested our opinion as to certain matters of Massachusetts law in
connection with the filing by Credit Suisse Trust, a Massachusetts trust with
transferable shares (the "Trust"), of Post-Effective Amendment No. 24 to the
Trust's Registration Statement on Form N-1A (the "Registration Statement") under
the Securities Act of 1933, as amended (the "Securities Act"), Registration No.
33-58125, and Amendment No. 25 to the Trust's Registration Statement under the
Investment Company Act of 1940, as amended, Registration No. 811-07261
(collectively, the "Amendment"), relating to the registration of shares of
beneficial interest, par value $.001 per share (the "New Portfolio Shares"), of
a new series, representing the beneficial interest in a new portfolio of the
Trust, the Commodity Return Strategy Portfolio (the "New Portfolio").

We have acted as Massachusetts counsel to the Trust in connection with the
authorization by the Trustees of the Trust of the issuance and sale of the New
Portfolio Shares. In this connection we have examined and are familiar with the
Trust's Declaration of Trust filed with the Secretary of the Commonwealth of
Massachusetts on March 15, 1995, as amended and supplemented to date (as so
amended and supplemented, the "Declaration"), the Bylaws of the Trust, the forms
of the Prospectus (the "Prospectus") and the Statement of Additional Information
(the "SAI") relating to the New Portfolio and included in the Amendment,
substantially in the form in which it is to be filed with the Securities and
Exchange Commission (the "SEC"), the actions of the Trustees to organize the
Trust and to establish the New Portfolio and to authorize the issuance of the
New Portfolio Shares, certificates of Trustees and officers of the Trust and of
public officials as to matters of fact, and such other documents and
instruments, certified or otherwise identified to our satisfaction, and such
questions of law and fact, as we have considered necessary or appropriate for
purposes of the opinions expressed herein. We have assumed the genuineness of
the signatures on, and the authenticity of, all documents furnished to us, and
the conformity to the originals of documents submitted to us as certified
copies, which facts we have not independently verified.

Based upon and subject to the foregoing, and subject to the qualification stated
in the first unnumbered paragraph following paragraph 3, below, we hereby advise
you that, in our opinion, under the laws of The Commonwealth of Massachusetts:

     1.   The Trust has been duly organized and is validly existing as a trust
          with transferable shares of the type commonly called a Massachusetts
          business trust.



Willkie Farr & Gallagher
January 11, 2006
Page 2


     2.   The Trust is authorized to issue an unlimited number of New Portfolio
          Shares; the New Portfolio Shares to be offered for sale by the
          Prospectus and SAI have been duly and validly authorized by all
          requisite action of the Trustees of the Trust, and no action of the
          shareholders of the Trust is required in such connection.

     3.   The New Portfolio Shares, when duly sold, issued and paid for as
          contemplated by the Registration Statement, at a price not less than
          the par value thereof, and provided, that the resolutions of the Board
          of Trustees authorizing the issuance of the New Portfolio Shares that
          are in effect on the date of this opinion have not been amended or
          rescinded and are in full force and effect on the date of issuance,
          will be validly and legally issued, fully paid and nonassessable by
          the Trust.

With respect to the opinion stated in paragraph 3 above, we wish to point out
that the shareholders of a Massachusetts business trust may under some
circumstances be subject to assessment at the instance of creditors to pay the
obligations of such trust in the event that its assets are insufficient for the
purpose.

This letter expresses our opinions as to the provisions of the Declaration and
the laws of Massachusetts applying to business trusts generally, but does not
extend to the Massachusetts Securities Act, or to federal securities or other
laws.

You may rely upon the foregoing opinions in rendering your opinion letter on the
same matters which is to be filed with the Amendment as an exhibit to the
Registration Statement, and we hereby consent to the reference to us in the
Prospectus, and to the filing of this letter with the SEC as an exhibit to the
Registration Statement. In giving such consent, we do not thereby concede that
we come within the category of persons whose consent is required under Section 7
of the Securities Act.

Very truly yours,


/s/ Sullivan & Worcester LLP
Sullivan & Worcester LLP