Introduction

The Cboe Titanium Cboe One Equities Feed delivers consolidated quote, trade, and Aggregated Depth At Price (ADAP) information for Cboe BYX Equities Exchange (BYX), BZX Equities Exchange (BZX), EDGA Equities Exchange (EDGA), and EDGX Equities Exchange (EDGX) (Cboe One US) via TCP/IP and UDP using the binary Cboe One protocol. The feed consists of Clear Quote, Symbol Summary, Best Quote Update, Market Status, ADAP, RPI, Trade, Trade Break, Trading Status, Opening/Closing Price, and End of Day Summary messages. Please note that BYX, BZX, EDGA, and EDGX will change the timestamp precision from milliseconds to nanoseconds.

The TCP/IP delivered feed can be used as a standalone product or to augment the UDP feed for recovery and start up purposes. The TCP/IP feed is available from the Cboe One Server and sends a replay of missed trades and refreshes the current state of the Cboe books followed by real-time updates to the books after a connection is established.

The UDP delivered feed is sourced from the Cboe One Feed Server (FS). Users may also connect to the Cboe One Gap Request Proxy for retransmission of missed packets on the UDP feed by the Cboe One Gap Server (GS).

While the TCP/IP and UDP delivered feeds offer equivalent real-time updates with matching sequence numbers, the consumer should assume message framing will be different between the transmission protocols.

It is important to note that the Cboe One feed is an aggregated feed. Updates for a symbol are sent as capacity for the feed allows. The image for a symbol will be current at the time of delivery, but multiple updates maybe combined into a single update. The interval between updates is dependent on the market conditions and the capacity configuration of the particular Cboe One feed.

The Cboe One Feed is available with different combinations of ADAP levels and update rates to meet the needs of our Cboe One users.