U.S. Option System Status
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MIAX Options
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MIAX Pearl
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MIAX Emerald
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MIAX Sapphire
All Options Exchanges Alerts
Trading Alert, Listing Alert, Regulatory Alert
MIAX Sapphire
October 23, 2026 | 03:18 PM
MIAX Exchange Group - Options Markets - Corporate Action Alert: Westport Fuel Systems Inc (WPRT) Trading Symbol Change
Westport Fuel Systems Inc (WPRT) will change its name and trading symbol to Aetherion Technologies Inc. (AETR) effective Monday, October 26,...
Trading Alert, Listing Alert, Regulatory Alert
MIAX Emerald
October 23, 2026 | 03:18 PM
MIAX Exchange Group - Options Markets - Corporate Action Alert: Westport Fuel Systems Inc (WPRT) Trading Symbol Change
Westport Fuel Systems Inc (WPRT) will change its name and trading symbol to Aetherion Technologies Inc. (AETR) effective Monday, October 26,...
Trading Alert, Listing Alert, Regulatory Alert
MIAX Options
October 23, 2026 | 03:18 PM
MIAX Exchange Group - Options Markets - Corporate Action Alert: Westport Fuel Systems Inc (WPRT) Trading Symbol Change
Westport Fuel Systems Inc (WPRT) will change its name and trading symbol to Aetherion Technologies Inc. (AETR) effective Monday, October 26,...
Trading Alert, Listing Alert, Regulatory Alert
MIAX Pearl
October 23, 2026 | 03:18 PM
MIAX Exchange Group - Options Markets - Corporate Action Alert: Westport Fuel Systems Inc (WPRT) Trading Symbol Change
Westport Fuel Systems Inc (WPRT) will change its name and trading symbol to Aetherion Technologies Inc. (AETR) effective Monday, October 26,...
Regulatory Alert, Trading Alert
MIAX Sapphire
October 23, 2026 | 02:49 PM
MIAX Pearl Options and MIAX Sapphire Options - Change to the Maximum Differential for the MIAX Pearl Order Monitor and MIAX Sapphire Order Monitor for Symbol MTD Effective Monday, October 26, 2026
MIAX Pearl Options and MIAX Sapphire Options will increase the MIAX Pearl Order Monitor and MIAX Sapphire Order Monitor maximum...
Regulatory Alert, Trading Alert
MIAX Pearl
October 23, 2026 | 02:49 PM
MIAX Pearl Options and MIAX Sapphire Options - Change to the Maximum Differential for the MIAX Pearl Order Monitor and MIAX Sapphire Order Monitor for Symbol MTD Effective Monday, October 26, 2026
MIAX Pearl Options and MIAX Sapphire Options will increase the MIAX Pearl Order Monitor and MIAX Sapphire Order Monitor maximum...
Regulatory Alert, Trading Alert
MIAX Options
October 23, 2026 | 02:48 PM
MIAX Options and MIAX Emerald Options - Change to Opening and Intra-day Quote Width Requirements for Symbol MTD Effective Monday, October 26, 2026
MIAX Options and MIAX Emerald Options will increase the maximum valid bid/ask differentials for the following symbol: METTLER-TOLEDO INTERNATIONAL INC. (MTD) The...