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605 Reports

January 2021

MEMX has updated the computation method for average realized spread and average effective spread as of January 2022, after this report was published.

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Alerts and Notices Product Notices

Product Notice 21-44 to 21-45: Additional Exchange Products Approved for Trading

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Effective Rule Filings Rule Filings

SR-MEMX-2021-03: Amendment to Rule 11.6(h)

Date Filed: February 24, 2021 Description: Proposed rule change to amend Exchange Rule 11.6(h)(1) to enable Users to include a limit price on a Pegged Order with a Primary Peg instruction.

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Alerts and Notices Product Notices

Product Notice 21-43: Additional Exchange Products Approved for Trading

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Alerts and Notices Product Notices

Product Notice 21-40 to 21-42: Additional Exchange Products Approved for Trading

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Alerts and Notices Systems Alerts

Systems Alert 21-06: 2/23/21 Issues Summary

At 15:55 ET the Exchange experienced a matching engine failure impacting symbol range U through Z. The software failure causing the outage has been identified and resolved. The Exchange will resume normal operations on 2/24/2021. Earlier in the day, the Exchange experienced an issue with its ticker plant. After several unsuccessful attempts to failover to […]

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Alerts and Notices Systems Alerts

Systems Alert 21-05: RESOLVED – Investigating Issue in Symbols U-Z

2/23/2021 19:27 ET – At 15:55 ET the Exchange experienced a matching engine failure impacting symbol range U-Z. The software failure causing the outage has been identified and resolved. The Exchange will resume normal operations on 2/24/2021. 2/23/2021 15:58 ET – The Exchange is currently experiencing an issue with the matching engine supporting symbols U-Z.

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Alerts and Notices Systems Alerts

Systems Alert 21-04: Market Data Source for A-L Moved to Secondary

2/23/2021 12:40 ET – Due to impact from the market data ingestion issue experienced earlier today the Exchange has moved to its secondary market data source for the remainder of the symbol ranges, A-L. The change occurred from 12:37 ET – 12:38 ET.

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Systems Alerts Uncategorized

Systems Alert 21-03: RESOLVED – Market Data Ingestion Issue

2/23/2021 12:07 ET – The Exchange will resume trading in symbols M-Z at 12:10 ET, using secondary source market data for this symbol range. The market data ingestion issue has been resolved. All Exchange systems are now operating normally. 2/23/2021 10:32 ET – The Exchange has halted trading in symbol range M-Z as of 10:32 […]

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Alerts and Notices Product Notices

Product Notice 21-37 to 21-39: Additional Exchange Products Approved for Trading