India's equity markets will implement a Closing Auction Session (CAS) for F&O stocks starting August 3, 2026, altering how closing prices are determined.
The CAS will affect F&O traders significantly
Aug 01, 2026
11:26 am
What's the storyIn a major overhaul, the Securities and Exchange Board of India (SEBI) and National Stock Exchange (NSE) will introduce a new Closing Auction Session (CAS) from August 3.
The change is aimed at improving price discovery for eligible Futures & Options (F&O) stocks.
Explained: What is CAS and what do new stock market timings mean for BSE, NSE traders?
New market timings from Monday; F&O segment to remain open till 3:40pm
BL Explainer: SEBI’s new Closing Auction Session, what investors need to know
New stock market timings from August 3: What has changed?
Closing auction session for equity cash segment comes into effect
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BSE launches closing auction session, market stays stable on day one
Stock market closing time changes from today: What happens at 3:15, 3:30 and 3:40 PM
CAS imbroglio: NSE clarifies all is well
New market timings from August 3 include extended F&O trading until 3:40 pm and a new Closing Auction Session.
Final minutes of the trading day are set to change from Monday, August 3, as the Securities and Exchange Board of India (Sebi) is…
