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Alerts and Notices Product Notices

Product Notice 23-32: Additional Exchange Products Approved for Trading

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Alerts and Notices Regulatory Notices

Regulatory Notice 23-02: CAT Clock Synchronization Certification Reminder – Due March 15th

Date: February 9, 2023 Description: Reminder of Consolidated Audit Trail Compliance Rule requirement to complete an annual certification for Business Clock Synchronization by March 15th of each year.

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Alerts and Notices Trader Alerts

Trader Alert 23-09: MEMX will no longer support version 1.9 MEMO and Fix Drop protocols as of March 1, 2023

On March 1, 2023, all 1.9 versions of the MEMX specs will be deprecated: MEMO SBE v1.9 MEMO FIX v1.9 FIX DROP v1.9 Our Market Operations team is here for any of your questions.    MEMX Market Operations   mops@memx.com   1-833-415-6677   

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Alerts and Notices Product Notices

Product Notice 23-30 to 23-31: Additional Exchange Products Approved for Trading

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Alerts and Notices Regulatory Notices

Regulatory Notice 23-01: Mandatory Participation in Regulation SCI Disaster Recovery Testing

Date: February 8, 2023 Description: Mandatory Participation in Regulation SCI Disaster Recovery Testing

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Alerts and Notices Trader Alerts

Trader Alert 23-08: Regulatory Transaction Fee Adjustment Effective February 27, 2023

This notice is being issued to inform you of the recently published Securities and Exchange Commission (SEC) order described in Fee Rate Advisory #2 for Fiscal Year 2023, in which the SEC announced the Section 31 transaction fee rate applicable to securities transactions on the exchanges and over-the-counter markets will be $8.00 per million dollars for covered sales occurring on or after […]

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Alerts and Notices Product Notices

Product Notice 23-28 to 23-29: Additional Exchange Products Approved for Trading

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Alerts and Notices Trader Alerts

Trader Alert 23-07: Holiday Reminder – Closed February 20, 2023

MEMX will be closed Monday, February 20, 2023, in observance of the Presidents’ Day holiday. Normal trading will resume on Tuesday, February 21, 2023. MEMX Market Hours and Holiday Schedule Please contact Market Operations with any questions. MEMX Market Operations mops@memx.com 1-833-415-6677  

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Alerts and Notices Product Notices

Product Notice 23-26 to 23-27: Additional Exchange Products Approved for Trading

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Alerts and Notices Product Notices

Product Notice 23-23 to 23-25: Additional Exchange Products Approved for Trading