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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.