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.

Data for Mar 28	Volume	% Market
Cboe Options Exchange	11,196,987	17.87%
Cboe C2 Options Exchange	2,020,633	3.22%
Cboe EDGX Options Exchange	5,410,337	8.63%
Cboe BZX Options Exchange	2,381,984	3.80%
Matched volume doesn't include trades routed to other market centers. (Data delayed at least 20 min.)

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Cboe Options Exchange Overview

Value of a Physical Trading Floor

Latest News

March 28, 2025
Cboe Options Exchanges Restrictions on Transactions in Options on 23andMe Holding Co. (Option Symbol ME/ME1) Effective March 28, 2025, 23andMe Holding Co., ME will be delisted from the NASDAQ and will move its listing to the Other-OTC Market under symbol MEHCQ. Therefore, trading on Cboe Options (C1) Exchange in MEHCQ and adjusted MEHQ1 options commencing on March 31, 2025, will be subject to certain restrictions described below. Please click title for complete details.
March 28, 2025
Reminder– Penny Interval Program Class Removals Effective trade date April 1, 2025, as previously announced in the Penny Interval Program Annual Review and Rebalancing notice, any option class in the Penny Program that falls outside the 425 most actively traded multiply listed option classes, will be removed from the Penny Program on the first trading day of April. The 425 most actively traded multiply listed option classes are based on National Cleared Volume from June 1 through November 30 of the prior year. Please click title for complete details.
March 28, 2025
Cboe Trader E-News for Friday, March 28, 2025
March 28, 2025
Schedule Update - Cboe Options Introduces Wide Market Protection The effective dates have been postponed until a future date. The new effective date(s) and any additional changes will be communicated in an upcoming notice.
March 28, 2025
Cboe Holiday Reminder - Modified Trading Hours on Thursday, April 17 and Friday, April 18, 2025 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 Good Friday.
March 26, 2025
Changes to Available Expirations for MXEA and MXEF Options Effective March 27, 2025, Cboe Options Exchange (“C1”) will begin offering the June 30, 2025, expiration for MXEA and MXEF. Please click title for complete details.
March 25, 2025
Cboe Options to List S&P 500 Equal Weight Index Options Cboe is pleased to announce that effective trade date April 14, 2025, Cboe Options Exchange (C1) will begin listing cash-settled options on the S&P 500 Equal Weight Index.
March 25, 2025
Cboe Options to List S&P 500 Equal Weight Index Options Cboe is pleased to announce that effective trade date April 14, 2025, Cboe Options Exchange (C1) will begin listing cash-settled options on the S&P 500 Equal Weight Index.
March 24, 2025
Cboe Options Scheduled Matching Engine Hardware Upgrade Effective April 6, 2025 and April 13, 2025, Cboe Options Exchange (C1) will perform a migration of Matching Engine processes to newer hardware.
March 24, 2025
Final Reminder - Cboe Options Updates Unit Symbol Distribution Effective trade date March 31, 2025, all Cboe-affiliated U.S. Options Exchanges will rebalance the symbol ranges for Matching Units 1-30. Please refer to the technical specifications listed below for the new symbol range distributions.