LULD Halt Auction Contingency Matrix
Cboe systems will automatically take the following actions if a matching engine failure occurs near an LULD Halt Auction. Normal matching engine fail over occurs in approximately 45 seconds.
| Matching Engine Crash Time | Time of Matching Engine Recovery | Result |
|---|---|---|
| Before halt | <= 10 min after halt | Halt & start 5 minute auction |
| Before halt | > 10 min after halt | No halt |
| During halt | <= 10 min after halt | Halt & start 5 minute auction |
| During halt | > 10 min after halt | Unhalt with no auction |
| Before halt | <= 10 min after halt (between 3:50 and 4:00 p.m. ET) | Halt & start volatility close auction. See Cboe Limit Up/Limit Down FAQ for details. |
| During halt | <= 10 min after halt (between 3:50 and 4:00 p.m. ET) | Halt & start volatility close auction. See Cboe Limit Up/Limit Down FAQ for details. |
| Before or during halt | After 4:00 p.m. ET | Unhalt with no auction |