Closing Auction Contingency Matrix
Cboe systems will automatically take the following actions if a matching engine failure occurs prior to the Closing Auction. Normal matching engine fail over occurs in approximately 45 seconds.
| Time of Matching Engine Recovery | Result |
|---|---|
| Prior to 3:59 p.m. ET (closing cutoff) | Closing Auction occurs at 4:00 p.m. ET |
| Between 3:59 p.m. ET and 4:00 p.m. ET | Closing Auction occurs at 4:05 p.m. ET |
| After 4:00 p.m. ET | No Closing Auction performed. Official Closing Price will be reported to the consolidated tape for each Cboe Listed security. The price will be the price of the Final Last Sale Eligible Trade (FLSET). |