Margins change after CME decision?: How does this affect the margins into the close?

Starting today, June 28, 2021, CME Group has removed the trading halt between 3:15 and 3:30 p.m. CT on CME Globex for Equity Index products.

This enhancement will allow market participants to access liquidity continuously throughout the trading day and manage event risk that occurs during the trading session with greater ease.

Subject to regulatory review and effective June 28, 2021, CME and CBOT will eliminate the 3:15 p.m. – 3:30 p.m. Central Time (CT) trading halt on CME Globex which currently exists for certain Equity futures and options contracts.

The halt was initially implemented to account for transactions conducted via open outcry in the trading pits and is therefore no longer necessary.

We will not be changing our margin policy as a result of this and the timings for requiring Day, Night and Initial margins will remain the same:

https://tradovate.zendesk.com/hc/en-us/articles/115002511608-What-hours-are-day-night-and-initial-margins-available-

Tradovate offers reduced margins for both the day session as well as the overnight session.

Reduced day margins are currently available from 8:00 AM ET to 4:00 PM ET.

Reduced night margins are currently available from 6:00 PM ET to 8:00 AM ET.

Initial margins will be required from 4:00 PM ET to 5:00 PM ET and if you are holding a position at the close of any market.

A full list of the day, night, and initial margin rates can be found on our margins page.