Mock trading sessions, typically conducted on Saturdays, are designed to help brokers and market participants validate their order management systems, test risk controls, and familiarise themselves with new features or exceptional scenarios without affecting live markets. Prices displayed during the session reflect mock values and do not represent actual market activity.
During the January 10 session, trading members will be able to test a wide range of functionalities, including call auction sessions, risk-reduction modes, trading halts, and block deal mechanisms. The exchange said the exercise would also cover exceptional market conditions, helping participants assess system behaviour during periods of stress.
The mock session will follow a detailed schedule, beginning with a login window from 10:15 am to 10:45 am. This will be followed by a morning block deal window, pre-open sessions, continuous trading for both T+1 and T+0 segments, special pre-open sessions for IPO and re-listed securities, periodic call auctions, settlement auctions, an afternoon block deal window, and post-closing activities. Trade modification windows for both T+1 and T+0 trades will also be enabled as part of the exercise.
The exchange noted that certain order entry sessions will have random stoppages towards the end to simulate real-market unpredictability. For instance, order entry may stop randomly in the last minute for pre-open and periodic call auction sessions, and in the last 10 minutes for special pre-open sessions for IPO and re-listed scrips.
As part of the exercise, the exchange will also release a new version of its trading workstation, BOLT Pro TWS version 12.50. Details related to the software upgrade are expected to be shared separately through an official circular.
A key highlight of the upcoming mock session is the testing of an alternate trading venue mechanism in line with a directive issued by the Sebi.The January 10 mock session will include a scenario in which an outage is induced at NSE, following which BSE will be invoked as the alternate trading venue for NSE-exclusive securities in the equity segment. This test is aimed at ensuring that trading can continue seamlessly even if one exchange faces a technical disruption.
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NSE said such drills are critical to identifying potential gaps or glitches before they impact investors. By regularly testing systems, connectivity, and contingency mechanisms, the exchange aims to strengthen operational resilience and maintain market confidence.
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