Effective on trade date Thursday, June 15, 2023, and pending all relevant CFTC regulatory review periods, this Market Regulation Advisory Notice will supersede CME Group Market Regulation Advisory Notice RA2203-5 from July 11, 2022. It is being issued to remind market participants that the transition to the pre-open state on CME Globex is randomized. Therefore, as stated in Section 3 of this Advisory Notice, it is imperative for market participants to wait until the receipt of the security status message indicating that the market has transitioned to the pre-open before the initiation of any TAS, TAM, BTIC, and TACO orders into CME Globex. Additionally, this Advisory Notice amends Section 4 to accurately reflect leg price assignment for TAS and TAM calendar spreads on CME Globex.
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