Background

• 24X acquired 11B Technologies in 2021. While 24X phased out most of the "11B" references in their API, ExecID remained unchanged until this update, introduced to adhere to ISDA best practices for Unique Trade Identifiers (UTIs).

Affected Venues

• exchange24
  

Change

The format of ExecID field published in ExecutionReport is updated. 

Details of the different components that form an ExecID before and after the change:

• Old Format - ExecID is formed of '11B', TradeID, TimeStamp and Side colon-separated components -  i.e. 31 characters in total. e.g. 11B:1234567890123456789:12345:B
• New Format - ExecID will be composed of a 10 character portion of 24X's LEI and a unique trade reference identifier with no special characters or delimiters up to 25 characters in length, followed by a side indicator - i.e. 36 characters in total. e.g. YXBUZH7G3N123456789012345678912345B

Timeline

• 07th September - UAT - Updated ExecID change made available on 24X's UAT environment.
• 18th September - UAT - Whisperer 2023.09.18.WE released, parsing the ExecutionReport ExecID to also publish the ExecutingFirmLEI PartyRole.
• 30th October - PROD - 24X implement the updated ExecID change in production.
  
• 17th November - PROD - As of release 2023.11.17.WE, Whisperer will no longer publish PartyRole ExecutingFirmLEI in ExecutionReport, reverting the change from 18 September, due to 24X supplying only a portion of their LEI.
  

Clients should ensure their downstream systems can handle the ExecID format change and client's API can process the changes, documented in Change Details section of this page.
MarketFactory reverted the change to parse LEI from ExecID field in release 2023.11.17.WE.