NSE revises closing auction and F&O hours from December 7

what happened

India's National Stock Exchange will introduce a revised closing auction and a new derivatives timetable on December 7, according to TradingView. The exchange released two circulars on November 6 that follow a October 15 review by the Securities and Exchange Board of India, covering the cash segment, equity derivatives and expiry-day settlement.

The closing auction is being cut to 10 minutes and will run each day from 3:30 pm to 3:40 pm. Between 3:31 pm and 3:36 pm both market and limit orders can be entered or changed, while the final stretch accepts limit orders only, with the entry cutoff falling at a random point in the last two minutes. The closing price will be the equilibrium price found in the auction, with the reference price used as a fallback, and a 3% band applies around the reference price.

Stock derivatives will keep trading until 3:45 pm on every day, including expiry days. Index derivatives also run to 3:45 pm on normal days, but contracts expiring that day will stop at 3:30 pm. Index expiry settlement will be based on the VWAP of constituent securities from 3 pm to 3:30 pm, while stock contracts will use the underlying stock's VWAP over the same window across all exchanges. The NSE says the changes can be tested in upcoming mock trading sessions, with separate circulars to follow.

why it matters

For Indian market participants, the longer derivatives window leaves more time to hedge positions into the close, while the shorter auction and 3% band narrow the range in which a closing price can form. Basing expiry settlement on a 30-minute VWAP reduces the influence of late-session moves on final prices, which matters for participants in index options and futures. The changes have no direct effect on global markets.

market impact

Indian stocks and derivatives: later trading cutoff and VWAP-based expiry settlement reshape the closing process

instruments