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Non-LULD Halt Auction Contingency Matrix

Cboe systems will automatically take the following actions if a matching engine failure occurs near a Halt Auction. Normal matching engine fail over occurs in approximately 45 seconds.

Table 1. Non-LULD Halt Auction Contingency Matrix
Time of Matching Engine RecoveryResult
After halt, no quoting period definedHalt
After halt, prior to quoting period startHalt with existing quoting period
During quoting periodHalt, quoting period will be rescheduled
After quoting endHalt, quoting period will be rescheduled
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Cboe Titanium U.S. Equities Auction Process - Non-LULD Halt Auction Contingency Matrix | Cboe