2026-22460NoticeWallet

Four Exchanges, One Very Specific Report About Missed Liquidity

Published Date: 11/4/2026

Notice

Summary

Cboe BZX Exchange is upgrading its Missed Liquidity Report, part of the Cboe Timestamping Service, to give traders better info on missed trading chances. This change helps market participants spot and act on missed liquidity faster, improving trading decisions. The update took effect right after filing on October 21, 2026, with no extra fees announced.

Analyzed Economic Effects

4 provisions identified: 2 benefits, 1 costs, 1 mixed.

Missed Liquidity Report Adds COA Events

If you subscribe to the Missed Liquidity Report, it will now include Complex Order Auction (COA) events so you can see time details for your COA-eligible options orders, quotes, and modify messages and for COA executions on the Complex Order Book (COB). The report applies the same time windows described in the filing (not to exceed 1 millisecond after and 100 microseconds before the first attempt to execute).

New Price Field Shows Multi-Level COA Prices

The enhanced Missed Liquidity Report will include a new price field that shows each price level at which options orders were executed during a COA that cleared across multiple price levels, along with the subscribing Member's own price levels. This lets a subscribing Member see where their orders and quotes sat relative to the price levels that cleared in the COA.

No Fee Increase Now; Fee Filing Planned

At the time of this filing (filed October 21, 2026), the Exchange is not proposing any fee increases for the Cboe Timestamping Service. The Exchange also states it plans to submit a separate rule filing to propose fees for the enhanced Cboe Timestamping Report.

Report Is Historical, Recipient-Only, and Not Real-Time

The Missed Liquidity Report (including the COA enhancements) is an optional, historical product provided generally on a T+1 basis and contains only data related to the subscribing Member's own messages; it does not provide real-time market data or identify other Members. The Exchange will restrict other market participants from receiving another Member's data.

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Key Dates

Effective Date
Published Date
10/21/2026
11/4/2026

Department and Agencies

Department
Independent Agency
Agency
Securities and Exchange Commission
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