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605 Reports

October 2020

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Alerts and Notices Trader Alerts

Trader Alert 20-11: Thanksgiving Holiday Schedule

MEMX will be closed Thursday, November 26, 2020 for Thanksgiving. MEMX will follow an abbreviated trading schedule on Friday, November 27, 2020 in which the regular market session will conclude at 1:00 p.m. ET and the post-market session will conclude at 2:00 p.m. ET.  Thursday, November 26, 2020 – Closed  Friday, November 27, 2020 – Abbreviated […]

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605 Reports

September 2020

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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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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 […]

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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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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.