Official Closing Price

Upon completion of the Cboe Closing Auction, the Cboe Official Closing Price for Cboe Listed securities will be disseminated to the consolidated tape along with a bulk execution. In the event the Cboe Closing Auction results in an execution of at least one round lot, the Cboe Official Closing Price (OCP) will be represented by a sale condition code of 6 (Market Center Closing Trade). A sale condition code of M (Market Center Official Close) can be expected to be represented at the close. Even in the event the security is in a regulatory trading halt.

Additionally, sale condition codes of M and 9 (Corrected Consolidated Close Price as Per Listing Market) will be disseminated to the consolidated tape during the post market trading session to represent the OCP. These updates will be distributed at:

• 16:10 ET
• 18:30 ET
• 20:00 ET

Certain market data vendors reference the consolidated tape’s Consolidated Last Sale during the end of day spin as a security’s OCP. Given non-primary market closing auctions may update the Consolidate Last Sale at market close for Cboe-listed securities as a result of race conditions, these spins help ensure market data vendors are referencing the correct OCP.