On Wednesday, August 30, 2023, MEMX Options released new versions of its MEMO specifications. Version 1.5 can be downloaded here. This update adds fields to the AllocationInstruction message in SBE and FIX, as well as a new value to the OrderRejectReasonCode field in FIX. For more details please see the Errata included in the specification download. Please reach out to mops@memx.com if you would like your MEMO accounts configured for version 1.5. Additionally MEMX options will be deprecating MEMO version 1.4.
Additional Resources:
- MEMX Options FAQ
- MEMOIR Depth and Top Multicast Addresses
Our Market Operations and Member Experience teams are here for any of your questions.
MEMX Market Operations
1-833-415-6677
MEMX Member Experience
1-833-415-6369