As previously announced here, MEMX Options released version 1.5B and 1.6B MEMO SBE specifications. This update will be available in Production starting Thursday, February 15, 2024.
**If your Firm currently uses the MassCancelRequest without specifying either UnderlyingOrSerie or Underlier, your MassCancelRequest will be rejected once this update is released .**
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