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
Department and Agencies
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Previous / Next Documents
Previous: 2026-22459, Self-Regulatory Organizations; Cboe C2 Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Introduce Enhancements to the Missed Liquidity Report Offered as Part of the Cboe Timestamping Service
Cboe C2 Exchange is upgrading its Missed Liquidity Report, part of the Cboe Timestamping Service, to give traders clearer and faster info about missed trading opportunities. This change helps traders make smarter moves and starts right away with no extra fees. Anyone using this service will benefit from better data to boost their trading game.
Next: 2026-22461, Self-Regulatory Organizations; Cboe EDGX Exchange, Inc.; Notice of Filing and Immediate Effectiveness of a Proposed Rule Change To Introduce Enhancements to the Missed Liquidity Report Offered as Part of the Cboe Timestamping Service
Cboe EDGX Exchange is upgrading its Missed Liquidity Report, part of the Cboe Timestamping Service, to give traders clearer and better info on missed trading chances. This change helps market pros track and improve their trading strategies faster and starts right away with no extra fees. If you trade or analyze stocks, these improvements will make your data smarter and more useful.