Opening and Closing Auction Times
Opening Auction Times
8:00 a.m. - The Cboe Pre-market Trading session begins. Dissemination of Opening Auction information begins.
9:28 a.m. - MOO/LOO orders are cutoff and LLOO orders are accepted at this time.
9:30 a.m. - The Opening Auction Match occurs.
Closing Auction Times
3:00 p.m. - Dissemination of Closing Auction information begins.
3:55 p.m. - MOC orders are cutoff at this time. LOC orders in Corporate Listings entered after this time are capped to the 3:55 p.m. Reference Price. LOC orders in all securities cannot be cancelled or modified. LLOC orders are accepted at this time.
3:59 p.m. - New LOC orders are cutoff at this time.
4:00 p.m. - The Closing Auction Match occurs.