BSE to Launch Pre-Open Trading Session for Equity Derivatives or F&O from December 8; No API Changes Required

The Bombay Stock Exchange (BSE) has announced plans to introduce a pre-open session for index and stock futures in the equity derivatives segment starting December 8, 2025. This decision aligns with directives from the Securities and Exchange Board of India (Sebi), which issued circulars on May 29 and June 4, urging exchanges to improve trading convenience and enhance risk monitoring in equity derivatives.

BSE Proposes To Allow Pre-open Trading in F&O

According to a BSE release, "Pursuant to the Sebi circular, it is proposed to introduce Pre-Open Session for index & stock futures in the Equity Derivatives Segment from Monday, December 08, 2025 onwards."

The exchange clarified that there will be no changes required in the ETI API or market data broadcast streams for this rollout. The existing message structures and field definitions used in the Equity Segment's Pre-Open Session will apply here as well.

When Will F& O Pre-open Trading Begin in BSE?

BSE has stated that further details regarding the implementation of the pre-open session in equity derivatives will be communicated through a separate circular. To facilitate this transition, changes related to the pre-open session will be available for testing from October 6 in a simulation environment. Members and third-party front-end trading application vendors have been advised to update their applications accordingly.

BSE Ltd Share Price Today

On Thursday, the stock price of BSE Limited on the National Stock Exchange (NSE) closed at Rs 2,178.40, reflecting a decline of Rs 40.70 or 1.84%. The stock had opened at Rs 2,218.00 and reached a high of Rs 2,230.00 during the day. The lowest price recorded was Rs 2,170.00. The previous day's closing price was Rs 2,215.60.

Sensex, Nifty Today: Stock Markets Tumble for Second Straight Session Amid US Tariff Concerns

On Thursday, August 28, both benchmark indices, the Sensex and Nifty 50 closed sharply lower, marking their second consecutive day of losses. The downturn was driven by growing concerns over the potential economic impact of the proposed 50% US tariffs on Indian goods, which analysts warn could shave off up to 1% from India's economic growth if sustained.

The Sensex ended the session with a decline of 706 points (0.87%) at 80,080.57, while the Nifty 50 dropped 211 points (0.85%) to settle at 24,500.90. Broader market indices also witnessed heavy selling, with the BSE Midcap index falling by 1.09% and the Smallcap index slipping 0.96%.

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