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 |
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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 |
|---|
| Classic Pro-Rata/Customer Priority/DMM Model |
| All-electronic exchange |
Cboe Options Exchange Overview
Value of a Physical Trading Floor
Latest News
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April 17, 2025
Cboe Options Exchanges Restrictions on Transactions in Options on Enzo Biochem, Inc. (Option Symbol ENZ/ENZB) Effective April 17, 2025, Enzo Biochem, Inc., ENZ will be delisted from the NYSE and will move its listing to the Other-OTC Market under symbol ENZB. Therefore, trading on Cboe Options (C1) Exchange in ENZB options commencing on April 21, 2025, will be subject to certain restrictions described below. Please click title for complete details. -
April 16, 2025
Quarterly Rebalance of Option Class Tiers Reminder – 1st Quarter 2025 Pursuant to Cboe Options Rule 5.50(g)(1) and EDGX Options Fees Schedule, each 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. -
April 16, 2025
Quarterly Rebalance of Option Class Tiers Reminder – 1st Quarter 2025 Pursuant to Cboe Options Rule 5.50(g)(1) and EDGX Options Fees Schedule, each 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. -
April 14, 2025
Cboe BZX Options Technology Refresh Cboe BZX Options Exchange (BZX) will be performing a hardware refresh on its FIX and BOEv3 Convenience order handler systems to be effective for April 28, 2025. No action is required by customers in association with these changes. -
April 14, 2025
Cboe Options Reduces SPX Intraday Initial Minimum Quote Size Requirements for Electronic Bids and Offers Effective trade date April 28, 2025, Cboe Options Exchange (C1) will change the minimum quote size requirement for appointed Market Makers in symbol SPX. The new minimum size requirement will apply during the Regular Trading Hours (RTH) session. -
April 11, 2025
Cboe Trader E-News for Friday, April 11, 2025 -
April 11, 2025
Cboe Options Exchanges Limit IOC Quotes per Quote Update Message Effective April 25, 2025, on EDGX Options (EDGX) Exchange and effective April 28, 2025, on BZX Options (BZX), Cboe Options (C1), and Cboe C2 Options (C2) Exchanges, Cboe will limit the number of IOC quotes per Quote Update message to one. -
April 11, 2025
Update - 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. -
April 11, 2025
Update - 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. -
April 4, 2025
Cboe Trader E-News for Friday, April 4, 2025