June 1, 2010 Drury Capital Inc. c/o Drury Capital Services 47 Hulfish Street — Suite 340 Princeton, NJ 08542 Attention: Mr. Bernard Drury Re: Management Agreement Renewal Dear Mr. Drury:

Exhibit 10.5(a)

June 1, 2010

Xxxxx Capital Inc.
c/o Drury Capital Services
00 Xxxxxxx Xxxxxx — Xxxxx 000
Xxxxxxxxx, XX 00000

Attention: Xx. Xxxxxxx Xxxxx

     Re: Management Agreement Renewal

Dear Xx. Xxxxx:

We are writing with respect to your management agreements concerning the commodity pool to which reference is made below (the “Management Agreement”). We are extending the term of the Management Agreement through June 30, 2011 and all other provisions of the Management Agreement will remain unchanged.

	•		Tactical Diversified Futures Fund L.P.
	•		CMF Xxxxx Master Fund
	•		Institutional Futures Portfolio L.P.

Please acknowledge receipt of this modification by signing one copy of this letter and returning it to the attention of Xx. Xxxxxxxx Xxxxx at the address above or fax to 000-000-0000. If you have any questions I can be reached at 000-000-0000.

Very truly yours,

CERES MANAGED FUTURES LLC
By:	/s/ Xxxxxxxx Xxxxx
	Xxxxxxxx Xxxxx
	Chief Financial Officer & Director
XXXXX CAPITAL INC.
By:	/s/ Xxxxxxx X. Xxxxx
	Print Name:	Xxxxxxx X. Xxxxx

XX/sr