# Federal Register #SR-C2-2026-028

SEC notice of proposed enhancements to Cboe C2 Exchange’s Missed Liquidity Report

**Buyer:** Securities and Exchange Commission
**Posted:** November 04, 2026
**Identifier:** SR-C2-2026-028
**NAICS:** 523210

This SEC notice concerns a proposed Cboe C2 Exchange rule change, not a government purchase.
- Government agency: Securities and Exchange Commission (SEC); the notice concerns Cboe C2 Exchange, Inc.
- Proposed change: Enhance the Missed Liquidity Report in the Cboe Timestamping Service by adding Complex Order Auction (COA) events and a price field showing the levels where options orders executed during a COA.
- The report would remain optional and available to interested Exchange Members for historical, Member-specific trading information.
- Cboe C2 Exchange, Inc. stated it may submit a separate filing about fees; this proposal does not request products or services for purchase.

### Description

Cboe C2 Exchange, Inc. proposes enhancements to the Missed Liquidity Report offered as part of the Cboe Timestamping Service. The proposed additions include COA events and a new price field showing each price level at which options orders were executed during a COA. The report remains optional and is available to Members; the notice solicits comments on the proposed rule change.

[View original listing](https://www.federalregister.gov/documents/2026/11/04/2026-22459/self-regulatory-organizations-cboe-c2-exchange-inc-notice-of-filing-and-immediate-effectiveness-of-a)