Opening Price and Size

At the conclusion of a successful series opening, an Auction Summary message is disseminated on TOP, PITCH, Auction, and Opening Process (C1 only) data feeds with summary trade information. The fields include the Auction Type, Price, and Contracts executed in the related Opening. See the Cboe Titanium U.S. Equities/Options Multicast Depth of Book (PITCH) Specification for Auction Summary message detail.

Cboe Titanium U.S. Options Opening Process Specification - Opening Price and Size | Cboe