System Status
Normal (1x) Width Market Collars at Market Open This Week on Cboe Options and C2 Options
Please be advised that in accordance with Cboe Rule 5.31, market collars for all classes, including volatility settlement constituent series, will be normal (1x) width at the open of trading each day this week on Cboe Options Exchange and C2 Options Exchange. Should market conditions warrant an intraweek change to market collar width at the open, additional notification will be provided.
Any changes to normal operations will be announced by notice and via the Cboe Options system status page. All Cboe systems are currently operating normally.
Please contact the Cboe Trade Desk with any questions.
Cboe Trade Desk
913.815.7001
tradedesk@cboe.com
Double Wide Market Collars at Market Open This Week on Cboe Options and C2 Options
Please be advised that in accordance with Cboe Rule 5.31, market collars for all classes, except for volatility settlement constituent series, will be double (2x) wide at the open of trading each day this week on Cboe Options Exchange and C2 Options Exchange. Should market conditions warrant an intraweek change to market collar width at the open, additional notification will be provided.
Any changes to normal operations will be announced by notice and via the Cboe Options system status page. All Cboe systems are currently operating normally.
Please contact the Cboe Trade Desk with any questions.
Cboe Trade Desk
913.815.7001
tradedesk@cboe.com
Double Wide Market Collars at Market Open This Week on Cboe Options and C2 Options
Please be advised that in accordance with Cboe Rule 5.31, market collars for all classes, except for volatility settlement constituent series, will be double (2x) wide at the open of trading each day this week on Cboe Options Exchange and C2 Options Exchange. Should market conditions warrant an intraweek change to market collar width at the open, additional notification will be provided.
Any changes to normal operations will be announced by notice and via the Cboe Options system status page. All Cboe systems are currently operating normally.
Please contact the Cboe Trade Desk with any questions.
Cboe Trade Desk
913.815.7001
tradedesk@cboe.com
Cboe Options Exchange has revoked self-help against BOX Options
Cboe Options Exchange has revoked self-help against BOX Options. Routing to BOX Options has been resumed as of 11:34:54 ET.
All Cboe Options Exchange systems are operating normally.
You can view Cboe Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe EDGX Options Exchange has revoked self-help against BOX Options
Cboe EDGX Options Exchange has revoked self-help against BOX Options. Routing to BOX Options has been resumed as of 11:23:07 ET.
All Cboe EDGX Options Exchange systems are operating normally.
You can view Cboe EDGX Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe C2 Options Exchange has revoked self-help against BOX Options
Cboe C2 Options Exchange has revoked self-help against BOX Options. Routing to BOX Options has been resumed as of 11:23:02 ET.
All Cboe C2 Options Exchange systems are operating normally.
You can view Cboe C2 Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe BZX Options Exchange has revoked self-help against BOX Options
Cboe BZX Options Exchange has revoked self-help against BOX Options. Routing to BOX Options has been resumed as of 11:22:57 ET.
All Cboe BZX Options Exchange systems are operating normally.
You can view Cboe BZX Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe BZX Options Exchange has declared self-help against BOX Options
Cboe BZX Options Exchange has declared self-help against BOX Options. Routing to BOX Options has been suspended as of 09:36:46 ET.
All Cboe BZX Options Exchange systems are operating normally.
You can view Cboe BZX Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe C2 Options Exchange has declared self-help against BOX Options
Cboe C2 Options Exchange has declared self-help against BOX Options. Routing to BOX Options has been suspended as of 09:35:45 ET.
All Cboe C2 Options Exchange systems are operating normally.
You can view Cboe C2 Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe Options Exchange has declared self-help against BOX Options
Cboe Options Exchange has declared self-help against BOX Options. Routing to BOX Options has been suspended as of 09:35:37 ET.
All Cboe Options Exchange systems are operating normally.
You can view Cboe Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe EDGX Options Exchange has declared self-help against BOX Options
Cboe EDGX Options Exchange has declared self-help against BOX Options. Routing to BOX Options has been suspended as of 09:35:32 ET.
All Cboe EDGX Options Exchange systems are operating normally.
You can view Cboe EDGX Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe Web Portal Issue Resolved
The intermittent issue with the cboe.com public website with impact to the Customer Web Portal has been resolved.
All exchange systems are operating normally.
Cboe Trade Desk | +1.913.815.7001 | tradedesk@cboe.com
Cboe Web Portal System Status Update
Cboe is investigating intermittent issues with the cboe.com public website with impact to the Customer Web Portal. Cboe will advise once more information is known.
All other exchange systems are operating normally.
Cboe Trade Desk | +1.913.815.7001 | tradedesk@cboe.com
Double Wide Market Collars at Market Open This Week on Cboe Options and C2 Options
Please be advised that in accordance with Cboe Rule 5.31, market collars for all classes, except for volatility settlement constituent series, will be double (2x) wide at the open of trading each day this week on Cboe Options Exchange and C2 Options Exchange. Should market conditions warrant an intraweek change to market collar width at the open, additional notification will be provided.
Any changes to normal operations will be announced by notice and via the Cboe Options system status page. All Cboe systems are currently operating normally.
Please contact the Cboe Trade Desk with any questions.
Cboe Trade Desk
913.815.7001
tradedesk@cboe.com
Cboe EDGX Options Exchange has declared self-help against BOX Options
Cboe EDGX Options Exchange has declared self-help against BOX Options. Routing to BOX Options has been suspended as of 15:58:26 ET.
All Cboe EDGX Options Exchange systems are operating normally.
You can view Cboe EDGX Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe Options Exchange has declared self-help against BOX Options
Cboe Options Exchange has declared self-help against BOX Options. Routing to BOX Options has been suspended as of 15:57:32 ET.
All Cboe Options Exchange systems are operating normally.
You can view Cboe Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe BZX Options Exchange has declared self-help against BOX Options
Cboe BZX Options Exchange has declared self-help against BOX Options. Routing to BOX Options has been suspended as of 15:57:05 ET.
All Cboe BZX Options Exchange systems are operating normally.
You can view Cboe BZX Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Cboe C2 Options Exchange has declared self-help against BOX Options
Cboe C2 Options Exchange has declared self-help against BOX Options. Routing to BOX Options has been suspended as of 15:56:25 ET.
All Cboe C2 Options Exchange systems are operating normally.
You can view Cboe C2 Options Exchange status online at https://www.cboe.com/us/options/notices/system/
Cboe Trade Desk
Cboe Global Markets
Phone: +1.913.815.7001
E-Mail: tradedesk@cboe.com
https://www.cboe.com/us/options/
THE EXCHANGE FOR THE WORLD STAGE TM
Resolved - Cboe C2 Options Exchange Complex Instrument Issue
Please be advised Cboe has resolved the issue on the Cboe C2 Options Exchange resulting in differing complex symbol IDs for the same complex instrument.
To address this issue, Cboe has deactivated the duplicate complex symbol IDs, which will have resulted any related GTC orders being cancelled back to impacted firms.
Cboe has identified the root cause to be a coding error which will be patched for Monday, April 7, 2025.
All other Cboe exchanges are operating normally.
Cboe Trade Desk
+1.913.815.7001
tradedesk@cboe.com
Cboe C2 Options Exchange System Status
Please be advised that Cboe is currently investigating a system issue on the Cboe C2 Options Exchange impacting complex instrument definitions.
All other Cboe exchanges are operating normally.
Cboe Trade Desk
+1.913.815.7001
tradedesk@cboe.com
Cboe Email Support Disruption Due to Planned System Upgrade
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Cboe Email Support Disruption Due to Planned System Upgrade
Reference ID: C2025032803
OVERVIEW
Please be advised Cboe will be upgrading its customer support system on Friday, March 28, 2025, from 9:00 p.m. ET to 1:00 a.m. ET. During this upgrade, email communications into Cboe support teams will be unavailable.
We encourage customers to send non-urgent inquires by email once the upgrade has been completed. For urgent matters during this upgrade, please contact the respective support team by phone.
ADDITIONAL INFORMATION
We appreciate your business. Our trading community inspires and drives our purpose of building trusted markets.
Contact Information
Please contact the appropriate group for support or with any questions.
THE EXCHANGE FOR THE WORLD STAGETM
Post Mortem: EDGX Options BOE Quote Order Handler Message In Flight Calculation Issue
Post Mortem: EDGX Options BOE Quote Order Handler Message In Flight Calculation Issue
Incident Description: System Disruption
On Thursday, February 27, 2025, Cboe EDGX Options Exchange ("EDGX Options") deployed its weekly scheduled software upgrade to its Matching Engine systems. Included in the software release was a feature to improve Matching Engine efficiency when handling order mass cancel and purge messages. The upgrade unexpectedly caused BOE Bulk Quoting Order Handlers to incorrectly calculate the count of messages in flight between the Order Handler and the Matching Engine, resulting in impacted Order Handlers having inflated counts of actual messages in flight. Due to standard message in flight restriction handling, these incorrectly elevated message in flight calculations resulted in a subset of Members being intermittently disconnected from BOE Bulk Quoting Order Handler ports during the affected time period.
After identifying and troubleshooting the issue, Cboe made the decision to disable the Exchange's message in flight restrictions for the remainder of the trading day. These restrictions were disabled on BOE Bulk Quoting Order Handlers only, and the issue was resolved at 9:44:33 ET.
Notification was sent by Cboe to EDGX Options Members at 9:49:06 ET regarding this issue and informing them the messages in flight restrictions had been disabled.
Members Affected:
A total of 10 Members were impacted.
Corrective Action:
The issue was immediately addressed by disabling the message in flight restrictions for all BOE Bulk Quoting Order Handlers. Cboe will roll back the Matching Engine software feature following the close of trading tonight and re-enable all published message in flight restrictions for trading on Friday, February 28, 2025. An additional software change will be implemented at a future date to allow the Matching Engine software feature to be re-enabled.
Cboe Trade Desk
913.815.7001
tradedesk@cboe.com
Cboe EDGX Options Exchange System Status Update
Cboe EDGX Options Exchange has disabled message in flight restrictions on BOE Quote sessions effective at 09:44:34 ET. This action was taken to resolve an issue relating to message in flight counting that was introduced today.
All Cboe Exchange systems are currently operating normally.
Cboe Trade Desk | +1.913.815.7001 | tradedesk@cboe.com
Resumption of Trading in MSTX Options
Trading in MSTX options has been resumed and will trade normally today on all Cboe Options exchanges.
All systems are operating normally.
Cboe Trade Desk
+1.913.815.7001
tradedesk@cboe.com