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Alerts and Notices Product Notices

Product Notice 20-1387 to 20-1388: Additional Exchange Traded Products Approved for Trading

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Alerts and Notices Product Notices

Product Notice 20-1383 to 20-1386: Additional Exchange Traded Products Approved for Trading

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Alerts and Notices Trader Alerts

Trader Alert 20-10: MEMX Trading Symbols Update

All NMS symbols will be active starting Thursday, October 29, 2020 See our Instrument Directory for the daily symbol list NMS routing is not currently enabled, MEMX will provide an update when we plan to enable it. ALL NMS test symbols are available. See the blog post on memx.com for the full update

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Alerts and Notices Product Notices

Product Notice 20-1351 to 20-1382: Additional Exchange Traded Products Approved for Trading

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Effective Rule Filings Rule Filings

SR-MEMX-2020-13: Proposal to Enable Members to Designate Orders as Retail Orders

Date Filed: October 26, 2020 Description: Proposed rule change to adopt new Rule 11.21 to enable members of the Exchange to designate certain orders they submit to the Exchange on behalf of retail customers to be identified as retail orders to the Exchange.

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Trader Alerts

Trader Alert 20-09: MEMX Trading Symbols Update

Additional 493 Symbols on Wednesday, October 21, 2020 The remainder of the S&P 500 components, plus the 24 instruments below will be added to the existing symbols. ABEVACBAPHABBDCVECXITUBNGDNNDMQIDSPXUSWN SQQQKCACKCAC+KCAC=KKRKKR-AKKR-BKKR-CTDW+AVST+ANSPR+BTDW+B See our Instrument Directory for the Full List Here NOTES: NMS routing is not currently enabled, MEMX will provide an update when we plan to enable […]

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Trader Alerts

Trader Alert 20-08: BCP/DR Testing Scheduled for October 24, 2020

In coordination with other market centers as part of the SIFMA organized industry test, and in support of Regulation System Compliance and Integrity requirements, MEMX will host a test of its secondary/disaster recovery facilities on Saturday, October 24th, 2020.  The scope for this weekend test will be a full feature test of all exchange functionality in order to ensure that […]

US Equities Instrument Directory

Click Here for the Instrument Directory Download What is the mapping in the file? The securityId field is the positive integer value used in the MEMOIR feeds when market data updates are reported for the product. The symbol field is a string that contains the CMS Symbol Root for the product. The symbolSfx field is […]

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Systems Alerts

Systems Alert 20-04: 10/12/2020 Issue Summary 

On October 12, 2020, the Exchange experienced an issue with a subset of internal monitors. The trading platform was not impacted. The issue manifested itself in the inability to fully view the trading data in a subset of the operational monitoring dashboards. Out of an abundance of caution for the greater marketplace, MEMX chose to halt pre-market trading at 09:15 […]

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Systems Alerts

Systems Alert 20-03: MEMX to Halt and Delay Open – RESOLVED

10/12/2020 11:33 ET – MEMX has resumed trading. 10/12/2020 11:15 ET – MEMX has resolved an issue propagating trading data into the Exchange’s monitoring complex. The issue did not impact the trading platform. MEMX will resume trading at 11:30 ET. All MEMX Systems are functioning normally. 10/12/2020 09:25 ET – MEMX will delay the market […]