OneChicago, LLC (“OneChicago”) is issuing this Notice to Members (“NTM”) 2017-22 to inform market participants that OneChicago is eliminating the Pre-Open state in its trading platform, Delta1. Delta1 currently supports four primary states: Pre-Open, Open, Close, and Halt. The Pre-Open state runs from 7:00:00 a.m. CT to 8:29:59 a.m. CT, during which time the reporting of bilateral trades in certain supported instruments, such as block trades and Exchange of Future for Physical (“EFP”) trades, is permitted. During the Pre-Open state, order entry for SSF and Spread instruments is not permitted.
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