Letter extending the Management Agreement among the Partnership, the General Partner and Willowbridge Advisors, Inc. from June 30, 2017 to June 30, 2018

Exhibit 10.3(b)

June 1, 2018

Willowbridge Associates Inc.

101 Morgan Lane - Suite 180

Plainsboro, N.J. 08536

Attention: Mr. Steve R. Crane

Dear Mr. Crane:

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.

Please acknowledge receipt of this modification by signing one copy of this letter and returning it to the attention of Mr. Patrick T. Egan at 522 Fifth Avenue – 7^th Floor, New York, NY 10036. If you have any questions, I can be reached at ###-###-####.