Category: Alerts and Notices

MEMX Options MEMO SBE, FIX, and FIX Drop specifications version 1.8 are now available for download in the upcoming version link here.  Version 1.8 is now in MEMX Options Development Environment (MODE).  This is an optional release.  Important Dates: Version 1.8 Details: Value (Tag 452) Name (Tag 448) 4 Clearing Firm 18 Contra GiveUp Clearing […]

MEMX Equities and MEMX Options will be closed Monday, September 2, 2024, in observance of Labor Day. Normal trading will resume on Tuesday, September 3, 2024. MEMX Market Hours and Holiday Schedule Please contact Market Operations with any questions. MEMX Market Operations mops@memx.com 1-833-415-6677

The Securities Information Processors (“SIPs”) will conduct a Market-Wide Circuit Breaker (“MWCB”) Level 1, Level 2 and Level 3 test on Saturday, September 7, 2024. In coordination with other market participants, MEMX will participate in the test per the following test script: MEMX 2024 Market-Wide Circuit Breaker Test Script. Certain members designated by MEMX are […]

On January 3, 2024, MEMX published Regulatory Notice 24-01: Mandatory Participation in Regulation SCI Disaster Recovery Testing. In coordination with other market centers as part of SIFMA BCP testing, and in support of Regulation System Compliance and Integrity requirements, MEMX will host a test of its secondary/disaster recovery facilities on Saturday, October 5, 2024. The scope for […]