Delayed Auction

In the event of systemic issues at Cboe at the time of an Opening/Closing auction, Cboe reserves the right to delay the MOC or LOC cut-off and auction match time OR to specify that no auction will occur. Should no auction occur, the price of the Final Last Sale Eligible Trade will be used for the Cboe Official Opening or Closing Price.

Cboe Titanium U.S. Equities Auction Process - Delayed Auction | Cboe