exv99w11wc

Exhibit 11(c)


		FORM OF DRAFT 11.12.10
				200 Clarendon Street
				27th Floor
				Boston, MA 02116-5021
				+1 617 728 7100 Main
				+1 617 426 6567 Fax
				www.dechert.com

November [ ], 2010

Board of Trustees
Janus Investment Fund

151 Detroit Street
Denver, Colorado 80206

Re: Janus Investment Fund on behalf of its Janus Growth and Income Fund series

Dear Ladies and Gentlemen:

We have acted as special counsel to Janus Investment Fund, a Massachusetts business trust (the “Trust”), and we have a general familiarity with the Trust’s business operations, practices and procedures. You have asked for our opinion regarding the issuance of shares of beneficial interest by the Trust in connection with the acquisition by Janus Growth and Income Fund, a series of the Trust, of the assets of Janus Research Core Fund, a series of the Trust, which shares have been registered on a Form N-14 Registration Statement (the “Registration Statement”) filed by the Trust with the U.S. Securities and Exchange Commission on [ ], 2010.

We have examined originals or certified copies, or copies otherwise identified to our satisfaction as being true copies, of various corporate records of the Trust and such other instruments, documents and records of the Trust as we have deemed necessary in order to render this opinion. We have assumed the genuineness of all signatures, the authenticity of all documents examined by us and the correctness of all statements of facts contained in those documents.

On the basis of, and subject to, the foregoing, it is our opinion that the shares of beneficial interest of the Trust registered under the Securities Act of 1933, as amended, in the Registration Statement, when issued in accordance with the terms described in the Registration Statement and the Agreement and Plan of Reorganization included therein, will be duly and validly issued and outstanding, fully paid and non-assessable by the Trust.

16023966.1.BUSINESS

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