Alerts and Notices Trader Alerts

Trader Alert 21-33: Advance Copy of Updated MEMO, MEMOIR, and FIX Drop Specifications for Spring of 2022

In spring of 2022, MEMX plans to release its new Retail Midpoint Liquidity Program (“RMLP”) pending SEC approval. The program details can be found here SR-MEMX-2021-10: Proposal to Establish a Retail Midpoint Liquidity Program.

The advance copy of the new specifications can be download here. You will be prompted to choose to download the current or the advance copy of the specifications.

Specification changes are detailed in the Errata document included in the spec download. MEMX will issue another trader alert with regard to timing of the release.

Below is a list of the specifications that are being updated along with their new version numbers.

  • MEMO FIX Version 1.7
  • MEMO SBE Version 1.7
  • FIX Drop Version 1.6
  • MEMOIR Top of Book Feed Version 1.4
  • MEMOIR Depth Feed Version 1.4

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