Effective Monday, February 10, 2025, the opening trigger on MEMX Options will be the primary exchange opening print and LULD band, subject to SEC approval. Our Market Operations and Member Experience teams are here for any of your questions.   MEMX Market Operations mops@memx.com 1-833-415-6677   MEMX Member Experience memberx@memx.com 1-833-415-6369 
Category: Trader Alerts
Trader Alerts, Regulatory Notices, and Product Notices have moved: MEMX Trading Alerts & Notices
MEMX Equities and MEMX Options will be closed Monday, January 20, 2025, in observance of the Martin Luther King, Jr. holiday. Normal trading will resume on Tuesday, January 21, 2025. MEMX Market Hours and Holiday Schedule Please contact Market Operations with any questions. MEMX Market Operations | mops@memx.com | 1-833-415-6677
To honor the memory of former President Jimmy Carter, MEMX Equities and MEMX Options will be observing the National Day of Mourning on Thursday, January 9, 2025. MEMX will be closed for trading on Thursday, January 9, 2025. Normal trading will resume on Friday, January 10, 2025. Please contact Market Operations with any questions. MEMX […]
Effective Thursday, January 2, 2025, MEMX will be implementing the following changes to transaction fees, subject to filing with the SEC: Changes are reflected in bold text below. Transaction Fees * * * * * Liquidity Provision Tiers Tier Rebate Per Share Required Criteria Tier 1 $(0.0034) (1) Member has an ADAV (excluding Retail Orders) […]
Effective for trading Monday, March 17, 2025, MEMX Equities MEMO, SBE, FIX, and FIX Drop Copy versions 1.10 and 1.11 will be deprecated. MEMX Equities will continue to support version 1.8 and 1.12. If your firm currently has 1.10 or 1.11 versions please contact Market Operations to update the version on or before Friday, March […]
MEMX Equities and MEMX Options will be closed Wednesday, January 1, 2025, in observance of New Year’s Day. MEMX Market Hours and Holiday Schedule Please contact Market Operations with any questions. MEMX Market Operations | mops@memx.com | 1-833-415-6677
MEMX Equities and MEMX Options will be closed Wednesday, December 25, 2024, in observance of Christmas Day. MEMX Equities will follow an abbreviated trading schedule on Tuesday, December 24, 2024, in which the regular market session will conclude at 1:00pm ET and the post-market session will conclude at 2:00pm ET. MEMX Options will follow an […]
MEMX Equities and MEMX Options will be closed Thursday, November 28, 2024, in observance of Thanksgiving. MEMX Equities will follow an abbreviated trading schedule on Friday, November 29, 2024, in which the regular market session will conclude at 1:00pm ET and the post-market session will conclude at 2:00pm ET. MEMX Options will follow an abbreviated […]
The Securities Information Processors (“SIPs”) will conduct data center failover testing as well as Market-Wide Circuit Breaker (“MWCB”) breach Level 1 and 2 on Saturday, December 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 […]
Effective Friday, November 1, 2024, MEMX will be implementing the following changes to transaction fees, subject to filing with the SEC: Changes are reflected in bold text below. Transaction Fees MEMX Members are charged per share fees or provided per share rebates based on shares executed within each of the fee code categories below. Fee […]