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Effective Rule Filings Rule Filings

SR-MEMX-2020-12: Updates to Market-Wide Circuit Breaker Rule

Date Filed: October 9, 2020 Description: Proposal to: (i) extend the pilot related to the market-wide circuit breaker in Rule 11.16 and (ii) amend Rule 11.16(b)(2) concerning the resumption of trading following a Level 3 market-wide circuit breaker halt.

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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 […]

Categories
Effective Rule Filings Rule Filings

SR-MEMX-2020-11: Change to Post-Market Session Hours

Date Filed: October 2, 2020 Description: Proposed rule change to amend Exchange Rule 1.5(w) to shorten the length of the Exchange’s after-hours trading session (i.e., the Post-Market Session) to end at 5:00 p.m. Eastern Time rather than 8:00 p.m.

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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.