Revision History
| Document Version | Date | Description |
|---|---|---|
| 1.0 | 06/16/08 | Initial Version 1.0. |
| 1.0.1 | 06/26/08 | Corrected Typos in symbology table. |
| 1.0.2 | 10/06/08 | Revised wording to reflect transition to Bats Exchange. |
| 1.0.3 | 12/03/08 | Moved Symbology reference to a separate document. |
| 1.0.4 | 08/26/09 | Removed SRO quote reference. |
| 1.1.0 | 01/12/10 | Expanded form messages created to support larger symbol size. |
| 1.1.1 | 04/06/10 |
|
| 1.1.2 | 04/15/10 | Updated FIX reference for BYX. |
| 1.2.0 | 10/23/10 |
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| 1.2.1 | 04/16/14 | Reference added for availability of the TOP protocol to EDGA and EDGX platforms that will be implemented in the NY5 datacenter. |
| 1.2.2 | 02/18/15 | Update to Time Update Message (Milliseconds) to indicate messages are sent from Server and not by Client. |
| 1.2.3 | 02/27/15 | Updated Trading Status message with new Halt Status definitions. |
| 1.3.0 | 02/19/16 | Bats branding/logo changes. |
| 1.3.1 | 10/17/17 | Cboe branding/logo changes. |
| 1.3.2 | 07/14/21 | Updated Cboe Symbology Reference Hyperlink/Trade Desk email. |
| 1.3.3 | 03/15/24 | Added new Extended Spin (server), Extended Bid Update (Server), Extended Ask Update (Server), and Extended Trade (Server) messages (effective 06/17/24). |
| 1.3.4 | 05/09/24 | Added new Extended Two-Sided Update (server) message (effective 06/17/24). |
| 1.3.5 | 05/21/24 | Updated Extended Two-Sided Update Message Type to "d" (effective 06/17/24). |
| 1.3.6 | 09/06/24 | Effective 11/13/24, Trading Status messages will be sent upon system start up rather than at the start of order acceptance. |
| 1.3.7 | 10/09/24 | Effective 11/13/24, clarified initial Trading Status messages will be sent upon system start up in addition to sending at the start of order acceptance. |
| 1.3.8 | 01/15/25 | Updated with Cboe Titanium branding. |
| 1.3.9 | 06/30/26 |
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