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
Hybrid, Classic Model
Open outcry and electronic exchange

Cboe C2 Options Exchange
Pro-Rata, Maker-Taker Model
All-electronic exchange

Cboe BZX Options Exchange
Price-Time, Maker-Taker Model
All-electronic exchange

Cboe EDGX Options Exchange
Classic Pro-Rata/Customer Priority/DMM Model
All-electronic exchange

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Cboe Market Volume

Summary of market volume and market share on the Cboe U.S. options exchanges.

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Latest News

January 24, 2023
BZX Options Introduces New Message in Flight Behavior Effective March 24, 2023 Effective March 24, 2023, Cboe will introduce changes to message in flight settings on the Cboe BZX Options Exchange (“BZX”). The changes include a reduction in the number of messages in flight to a single matching engine as well as a new limit on the total number of unacknowledged messages for each FIX or BOE order entry session. Please click the title for complete details.
January 23, 2023
Restrictions on Transactions on Cboe Options Exchange in Options on Tricida Inc. (Option Symbol TCDA) Effective January 24, 2023, Tricida Inc., TCDA will be delisted from the NASDAQ and will move its listing to the Other-OTC Market under symbol TCDAQ. Therefore, trading on Cboe Exchange, Inc. (“Cboe Options”) in TCDA options commencing on January 24, 2023 will be subject to certain restrictions described below. Please click title for complete details.
January 20, 2023
Cboe Trader E-News for Friday, January 20, 2023
January 20, 2023
Cboe Lists New Option Series in Energy Select Sector Index Effective January 20, 2023, Energy Select Sector (option symbol: SIXE) again meets Cboe Options listing requirements for continued listing. Please click the title for complete details.
January 19, 2023
Restrictions on Transactions on Cboe Options Exchange in Options on American Virtual Cloud Technologies Inc. (Option Symbol AVCT/AVCT1) Effective January 19, 2023, American Virtual Cloud Technologies Inc., AVCT/AVCT1 will be delisted from the NASDQ. Therefore, trading on Cboe Exchange, Inc. (“Cboe Options”) in AVCT and adjusted AVCT1 options commencing on January 20, 2023, will be subject to certain restrictions described below. Please click title for complete details.
January 19, 2023
Restrictions on Transactions on Cboe Options Exchange in Options on CI Financial Corp. (Option Symbol CIXX/CIXXF) Effective January 19, 2023, CI Financial Corp., CIXX will be delisted from the NASDAQ and will move its listing to the Other-OTC Market under symbol CIXXF. Therefore, trading on Cboe Exchange, Inc. (“Cboe Options”) in CIXX and adjusted CIXXF options commencing on January 20, 2023, will be subject to certain restrictions described below. Please click title for complete details.
January 18, 2023
New Option Series in Russell 1000 Growth Index As of January 13, 2023, the Russell 1000 Growth Index (option symbol: RLG) Index no longer meets Cboe Options listing requirements for continued listing pursuant to Cboe Options Rule 4.10(g). No new series will be added until such time as the index again meets the current continued listing requirements or Cboe Options amends its requirements for continued listing, subject to regulatory approval. Please click title for complete details.
January 17, 2023
Quarterly Rebalance of Option Class Tiers Reminder – 4th Quarter 2022 Pursuant to Cboe Options (“Cboe Options” or the “Exchange”) Rule 5.50(g)(1), the Exchange rebalances the option class appointment unit tiers, excluding the “AA” tier, every calendar quarter based on national average daily volume (ADV), which may result in additions or deletions to each tier’s composition. Please click the title for complete details.
January 17, 2023
Quarterly Rebalance of Option Class Tiers Reminder – 4th Quarter 2022 Pursuant to Cboe Options (“Cboe Options” or the “Exchange”) Rule 5.50(g)(1), the Exchange rebalances the option class appointment unit tiers, excluding the “AA” tier, every calendar quarter based on national average daily volume (ADV), which may result in additions or deletions to each tier’s composition. Please click the title for complete details.
January 13, 2023
Cboe Trader E-News for Friday, January 13, 2023