On Tuesday Nov 22, 2022, MEMX released new versions of its current MEMO FIX, MEMO SBE, and FIX Drop Specifications. Version 1.8 Rev-C, 1.9 Rev-C, 1.9 Rev-D, and 1.10 Rev-C and 1.10 Rev-D can be found here using the “upcoming version” link. The changes include the following which are outlined in the Errata and leverage existing fields in the protocols, there are no new additional fields in this release, but there are new enum values:
MEMO SBE 1.8 Rev-C: Added 4 new liquidity codes to the existing LastLiquidityIndType Field
- 11 – AddDisplayedPriceImprovement
- 12 – AddHiddenPriceImprovement
- 111 – RetailAddDisplayedPriceImprovement
- 112 – RetailAddHiddenPriceImprovement
MEMO FIX 1.9 & 1.10 Rev-C, MEMO SBE 1.9 & 1.10 Rev-C, and Fix Drop 1.9 & 1.10 Rev-C: Added new SelfTradePrevention values to ExtendedRestatementReason
- 3 -SelfTrade-CancelNewest
- 4 -SelfTrade-CancelOldest
- 5 -SelfTrade-DecrementAndCancel
- 6 -SelfTrade-CancelBoth
- 7 -SelfTrade-CancelSmallest
MEMO FIX 1.8 Rev-C, FIX 1.9 & 1.10 Rev-D, MEMO SBE 1.9 & 1.10 Rev-D, and Fix Drop 1.8 Rev-C, and Fix Drop 1.9 & 1.10 Rev-D: Added 4 new liquidity codes to the existing LastLiquidityIndType Field
- 62 – AddDisplayedPriceImprovement
- 63 – AddHiddenPriceImprovement
- 162 – RetailAddDisplayedPriceImprovement
- 163 – RetailAddHiddenPriceImprovement
This release is currently running in the MDE environment and is available throughout the week for testing. The planned released date for production is Thursday, December 1,2022.
Our Market Operations team is here for any of your questions.
MEMX Market Operations
1-833-415-6677