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Wednesday, July 30, 2025

Equity Trader Alert #2025 - 50
Nasdaq Introduces Change Side on Replace Functionality for OUCH 5.0

Category:

  • New Functionality

Markets Impacted:

Contact Information:

Resources:

The Nasdaq Stock Market (Nasdaq), Nasdaq BX, and Nasdaq PSX, will enhance the OUCH 5.0 protocol by introducing the ability to change the Side on Replace Order Request messages. This functionality allows users to specify the Side as an optional appendage within the Replace Order Request message.

The rollout will occur on an exchange-by-exchange basis on the following dates:

PSX: August 25th

BX: September 3rd

Nasdaq: September 8th

Please refer to the Specifications Page 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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