June 1, 2018 Campbell & Company, L.P.

Exhibit 10.5(d)

June 1, 2018

Xxxxxxxx & Company, L.P.

0000 Xxxxxx Xxxx Xxxxx

Baltimore, MD 21209

Attn: Mr. Xxx Xxxxx

Re:  Management Agreement Renewal

Dear Xx. Xxxxx:

We are writing with respect to your management agreement concerning the commodity pools to which reference is made below (the “Management Agreement”). We are extending the term of the Management Agreement through June 30, 2019 and all other provisions of the Management Agreement will remain unchanged.

• Potomac Futures Fund L.P.

Please acknowledge receipt of this modification by signing one copy of this letter and returning it to the attention of Xx. Xxxxxxx X. Xxxx at 000 Xxxxx Xxxxxx – 0xx Xxxxx, Xxx Xxxx, XX 00000. If you have any questions, I can be reached at 000-000-0000.

Very truly yours,
CERES MANAGED FUTURES LLC
By:		/s/ Xxxxxxx X. Xxxx
		Xxxxxxx X. Xxxx
		President and Director

XXXXXXXX & COMPANY, L.P.

By:		/s/ Xxxxx X. Xxxxxx         /s/ Xxxxxxx X. Xxxxxxx
Print Name:		Xxxxx X. Xxxxxx              Xxxxxxx X. Xxxxxxx
PE/tr