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Monday, August 4, 2025

Equity Trader Alert #2025 - 53
UPDATE IN TIMING: Nasdaq Introduces Order Port Level Purging Functionality

Category:

  • New Functionality

Markets Impacted:

Contact Information:

Resources:

As previously announced in ETA 2024-11, The Nasdaq Stock Market (Nasdaq), Nasdaq BX, and Nasdaq PSX introduced order port level purging functionality on the OUCH 5.0 and RASH FIX protocols. The new functionality allows users to cancel open orders and disable/re-enable order entry on a given port. The initial implementation only included the ability to cancel open orders. The exchanges will now be rolling out the ability to disable/re-enable order entry on a given port.

This feature will be made available on an exchange-by-exchange basis:

PSX: August 25th

BX: September 3rd

Nasdaq: September 8th

Testing Opportunities

Testing is currently available in the Nasdaq Testing Facility (NTF).

The Saturday UAT production testing opportunity will be on August 9th.

Please refer to the Specifications Page and ETU 2024-5 for more information.

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Nasdaq (Nasdaq: NDAQ) is a leading global provider of trading, clearing, exchange technology, listing, information and public company services. Through its diverse portfolio of solutions, Nasdaq enables customers to plan, optimize and execute their business vision with confidence, using proven technologies that provide transparency and insight for navigating today's global capital markets. As the creator of the world's first electronic stock market, its technology powers more than 90 marketplaces in 50 countries, and 1 in 10 of the world's securities transactions. Nasdaq is home to approximately 3,900 total listings with a market value of approximately $13 trillion. To learn more, visit: business.nasdaq.com.

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