Volatility Close Auction

If a scheduled Regulatory Halt re-opening is not completed prior to 3:50 p.m. ET, then a Volatility Close Auction will be completed in lieu of the Regulatory Halt Auction. The Volatility Close will occur at 4:00 p.m. ET and will include all orders submitted for the Regulatory Halt Auction plus any On-Close interest. There will be no MOC or LOC cutoff time for a Volatility Close Auction.Cboe disseminates Cboe Closing Auction informationevery 5 seconds between 3:00 and 3:59 p.m. and every 1 second between 3:59 and 4:00 p.m. for the Closing Auction. The last calculated halt re-opening collar in effect at 3:50 p.m. ET, as described above, will be retained and applied for the Volatility Close Auction.

Cboe Titanium U.S. Equities Auction Process - Volatility Close Auction | Cboe