June 1, 2018 The Cambridge Strategy (Asset Mgt.) Ltd. Berger House

Exhibit 10.6(b)

June 1, 2018

The Cambridge Strategy (Asset Mgt.) Ltd.

Xxxxxx House

00-00 Xxxxxxxx Xxxxxx, 0xx Floor

Mayfair, London W1J5AE UK

Attention: Mr. Xxxx Xxxxx

Re: Management Agreement Renewal

Dear Xx. Xxxxx:

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

•   Cambridge Master Fund L.P.

•   Emerging CTA Portfolio L.P.

•   Ceres Tactical Currency L.P.

•   Ceres Tactical Systematic 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 – 0^xx 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

THE CAMBRIDGE STRATEGY (ASSET MGT.) LTD.

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