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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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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 […]

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Alerts and Notices 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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Alerts and Notices 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 […]

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Alerts and Notices Trader Alerts

Trader Alert 20-07: MEMX Trading Symbols Update

Starting Tuesday October 13th our active symbols will be: Current symbols: ACST, AMGN, BB, CRM, DIA, ED, F-B, GOOG, GS, HD, HON, ICSH, MCD, MMM, MSFT, NOK, UNH, V, XOM 29 New Additions: (20) The rest of DIA constituents – AAPL, AXP, BA, CAT, CSCO, CVX, DIS, DOW, IBM, INTC, JNJ, JPM, KO, MRK, NKE, […]

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Alerts and Notices Systems Alerts

Systems Alert 20-02: MEMIOR Top, Depth, and Last Sale Issue – RESOLVED

10/09/2020 09:10 ET – MEMX has normalized the “a” and “b” feeds as of 09:10 ET. Customers should use their normal mechanisms (i.e. replay from sequence 1 or snapshot) to recover the feed state. All systems are now operating normally. 10/09/2020 09:03 ET – MEMX has determined that there was a messaging count inconsistency between […]

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Alerts and Notices Trader Alerts

Trader Alert 20-06: MEMX Market Hours Change

As of Monday, October 5th the Post-Market session will end at 5PM ET.

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Alerts and Notices Trader Alerts

Trader Alert 20-05: MEMX Trading Symbols Update

Starting Tuesday September 29th our active symbols will be: Our 7 launch symbols ACST, BB, ED, F-B, GOOG, ICSH, XOM 12 new additions NOK which is an ADR DIA which is an ETF, and DIA’s top 10 constituents: UNH, HD, AMGN, CRM, MCD, MSFT, V, GS, MMM, HON All NMS test symbols NOTE: NMS routing is not currently enabled, […]

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Alerts and Notices Systems Alerts

Systems Alert 20-01: Start of Pre-Market Delayed – RESOLVED

9/23/20 08:15 ET – MEMX experienced an issue with market data ingestion in the Pre-Market. The issue has been fully resolved. The Pre-Market session opened at 08:15 ET. All MEMX systems are operating normally. 9/23/20 07:00 ET – MEMX is currently investigating a potential issue and will not open the pre-market session until further notice.