Cboe Options Exchanges
Cboe provides choice for our diverse trading customers by operating four U.S.-listed cash equity options markets, including the largest options exchange in the U.S. – Cboe Options Exchange.
Cboe Options Exchange |
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Hybrid, Classic Model |
Open outcry and electronic exchange |
Cboe C2 Options Exchange |
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Pro-Rata, Maker-Taker Model |
All-electronic exchange |
Cboe BZX Options Exchange |
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Price-Time, Maker-Taker Model |
All-electronic exchange |
Cboe EDGX Options Exchange |
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Classic Pro-Rata/Customer Priority/DMM Model |
All-electronic exchange |
Latest News
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May 10, 2024
Cboe Trader E-News for Friday, May 10, 2024 -
May 6, 2024
Cboe Options Exchange to Reduce SPX Intraday Initial Minimum Quote Size Requirements for Electronic Bids and Offers Effective trade date May 20, 2024, Cboe Options Exchange (C1) will reduce the initial minimum quote size requirements for intraday electronic bids and offers during the Regular Trading Hours (RTH) session in the SPX group of series. This change will update the corresponding requirements previously described in Cboe Options Regulatory Circular RG19-032. -
May 6, 2024
Cboe Holiday Reminder – Modified Trading Hours on Monday, May 27, 2024 The table below outlines the modified trading schedules for the Cboe Options Exchanges (Cboe Options (“C1”), C2, BZX, and EDGX Options) and the Cboe U.S. Equities Exchanges (BYX, BZX, EDGA, and EDGX Equities) in observance of Memorial Day. All times referenced in this notice are ET. -
May 3, 2024
Cboe Trader E-News for Friday, May 3, 2024 -
May 3, 2024
Cboe Equities and Options Exchanges Update Message in Flight Behavior Cboe recently updated message in flight limits on all US Options and US Equities Exchanges. Cboe has identified an edge case where it is possible for any FIX or BOE order entry session to have a higher number of messages in flight than the defined limits. Cboe will deploy an enhancement to message in flight functionality to more strictly enforce the defined limit in this edge case. -
May 3, 2024
Cboe Trading Floor Power Maintenance – Saturday, May 18, 2024 On Saturday, May 18, 2024, the Facilities Department will conduct maintenance on the electrical infrastructure on the Cboe Trading Floor at 141 Jackson. The electrical design allows each power source to be shut down individually without disrupting the network. -
May 2, 2024
Schedule Update - Cboe BZX Options Announces Release and Weekend Testing Dates for Unitized Architecture, BOEv3 Protocol Cboe BZX Options Exchange (BZX) is pleased to announce the release of version 3 of its Binary Order Entry (BOE) protocol on August 19, 2024, subject to regulatory review. The BOEv3 protocol will offer fixed length messages, a single gateway per matching unit, and enhanced determinism. -
May 1, 2024
Penny Program – Additional Class to be Added The Cboe-affiliated US Options Exchanges (BZX Options, Cboe Options, C2 Options, and EDGX Options) will add the following new issue to the Penny Program on the effective date listed below. Please click title for complete details. -
May 1, 2024
OCC Clearing Number 013 Terminated on Cboe Exchanges Please be advised that OCC Clearing #013, assigned to Sanford C. Bernstein & Co., LLC has been terminated as a valid Clearing Number for trades executed on the Cboe Options, BZX Options, BYX Equities, BZX Equities, EDGA Equities and EDGX Equities Exchanges. -
May 1, 2024
OCC Clearing Number 013 Terminated on Cboe Exchanges Please be advised that OCC Clearing #013, assigned to Sanford C. Bernstein & Co., LLC has been terminated as a valid Clearing Number for trades executed on the Cboe Options, BZX Options, BYX Equities, BZX Equities, EDGA Equities and EDGX Equities Exchanges.