The National Stock Exchange (NSE) is changing the framework for its pre-open session, which runs before regular trading starts. The update restructures how the pre-open auction works to improve the process of setting prices at the start of the trading day.

The revised approach is designed to make the pre-open auction more structured and to strengthen price discovery during that period. While the available reporting focuses mainly on the objective and general purpose of the change, it indicates that the intent is to improve how bids and orders contribute to establishing an opening reference price, rather than altering the core idea of a pre-open mechanism.

Across the coverage provided, the emphasis remains on the operational change to the pre-open auction process and its expected effect on price formation. No specific implementation dates, detailed rule differences, or quantified impacts are included in the provided excerpts.