From the CME Globex Control Center, here is the summary of KEY changes, per CME market segment
Monday, February 19, 2024 - Early Market "HALT" - Noon CST (Chicago) > then reopens normal times.
*Any open positions must meet Exchange Maintenance Margin by 11:45 am CST.
https://www.ampfutures.com/trading-info/margins/
View Full List: https://www.ampfutures.com/trading-info/holiday-hours/
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