The National Stock Exchange of India extended Futures and Options (F&O) trading hours to 3:40 PM starting Monday, Aug. 3 [1].

This shift aims to synchronize equity derivatives trading with the cash market's new Closing Auction Session (CAS). By aligning these two segments, regulators intend to improve price discovery and overall market efficiency [2].

The new schedule, effective Aug. 3, 2026 [3], represents a 10-minute extension compared to the previous trading window [4]. This adjustment allows traders in the F&O segment to operate alongside the introduction of the CAS for eligible stocks [5].

The change comes under the regulatory oversight of the Securities and Exchange Board of India (SEBI) [2]. The primary goal is to ensure that the pricing of derivatives reflects the final movements of the underlying cash market stocks during the closing phase of the trading day [2].

Under the updated rules, the equity derivatives market will now remain open until 3:40 PM [6]. This ensures that the F&O segment does not close prematurely while the cash market is still determining final closing prices through the auction process [2].

Market participants must now adjust their trading strategies to account for the extended window. The NSE implemented these changes to reduce volatility and provide a more stable transition into the market close [2].

“The National Stock Exchange of India extended Futures and Options (F&O) trading hours to 3:40 PM”

The alignment of F&O timings with the Closing Auction Session reduces the risk of price discrepancies between the cash and derivatives markets at the end of the day. By extending the window by 10 minutes, the NSE minimizes the potential for arbitrage and volatility that occurs when one market closes before the other has finalized its daily closing price.