Complex Solicitation Auction Mechanism (Complex SAM) (C1 and EDGX Only)

The purpose of Complex SAM auctions is to facilitate the crossing of large size solicited orders. The information below will detail only the significant differences for Complex SAM relative to Complex AIM. Unless mentioned below, all other requirements for Complex AIM will also be applied Complex SAM.

• Complex SAM auctions must have 500 contracts or greater on the smallest leg of the complex order or it will be rejected.
• Customer Priority on the COB and Simple Book will always be enforced for Complex SAM allocations regardless of whether Customer Priority is enabled for the class.
• If better priced responses or a Non-Customer complex order is entered, the Agency side will be filled against the better priced responses and orders only if the entire quantity can be price improved.
• If an equal or better priced Priority Customer complex order is entered, the Agency side will be filled against the Priority Customer order only if it can fill the entire agency order by itself or when combined with equal or better priced responses and complex orders on the book.