Tuesday, April 23, 2019
Equity Trader Alert #2019 - 34
Reminder: Nasdaq, BX and PSX Market-Wide Circuit Breaker Testing Opportunity on Saturday, June 8, 2019
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In coordination with other market participants, on Saturday, June 8, 2019, The Nasdaq Stock Market, Nasdaq BX and Nasdaq PSX will be conducting a full-day test of all three Market-Wide Circuit Breaker (MWCB) breach levels (7%, 13% and 20%) with a simulated next day 9:30am opening. Firms are encouraged to test their ability to receive all messages associated with MWCB, including decline status, halt and resume messages. Firms will also be able to participate in re-opening auctions following the MWCB halts. June 8, 2019 MWCB Test Script
There will be a break between 11:30am – 2:30pm for markets to shut down and reset their systems to simulate the next day opening.
Note: System timestamps and timestamps represented on messages will not be altered during simulations and will reflect the actual date/time of the test. 2019 Failover/Market-Wide Circuit Breaker Test ScheduleAs a reminder, the SIPs have established the following additional Failover/MWCB Saturday test opportunities:
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