On Tuesday, January 17, 2023, MEMX released new versions of its current MEMO FIX, MEMO SBE, and FIX Drop Specifications. Version 1.11 can be found here using the “upcoming version” link. The changes include the following which are outlined in the Errata.
- Added new Security Group (tag 1151) field to the ExecutionReport-Trade and Trade Cancel/Correct messages indicating the security’s tape. This is not backwards compatible and thus would require Members to request a configuration change to the new 1.11 version.
- Good For Time orders where Expire Time is omitted will be set to expire at the end of the post market trading session. This change is backwards compatible and thus will be available to all members regardless of the MEMO version.
- MEMX will now support Reserve orders with the ISO modifier. This change is backwards compatible and thus will be available to all members regardless of the MEMO version.
This release is currently running in the MDE environment and is available for testing. The planned released date for production is Wednesday, February 1, 2023.
Our Market Operations team is here for any of your questions.
MEMX Market Operations