Introduction

Cboe Members may use the Cboe Titanium BZX Equities Auction Feed to obtain Opening, Closing, Halt, IPO Auction, and Cboe Market Close (CMC) information. The Auction Feed is a direct data feed product. The Auction Feed disseminates Cboe Auction price and size information as follows:

• Every 5 seconds between 8:00 a.m. and when the Opening Auction occurs (effective 10/05/26).
• Every 5 seconds between 3:00 and, every 5 seconds between 3:59 p.m. and every 1 second between 3:59 and 4:00 p.m. for the Closing Auction.
• Every 5 seconds during a defined Quote-Only period for Halt and IPO Auctions.