New Delhi, Aug. 1 -- India's equity markets are set for one of their biggest operational changes in recent years. From August 3, 2026, the Securities and Exchange Board of India (SEBI) and the National Stock Exchange (NSE) will introduce the Closing Auction Session (CAS) for eligible Futures & Options (F&O) stocks, fundamentally changing how closing prices are determined.

The introduction of the Closing Auction Session marks a significant structural change in India's equity markets. While long-term investors may notice little difference in day-to-day investing, the new framework is expected to have a much bigger impact on F&O traders, brokers, institutional investors and passive funds,

The new framework not only replaces the existing Vo...