India’s benchmark indices fell on September 8 as oil prices climbed, but the unusual move came in the newly introduced Closing Auction Session. Reuters reported that the Nifty’s indicative close fell as much as 1.8% during the auction before the index ultimately ended 0.61% lower at 23,635.1.
The Closing Auction Session, introduced on August 3, determines the official closing price through an auction rather than simply using the last traded price. On derivatives-expiry days, limited participation and rapid shifts in the indicative close can affect hedging, options pricing and the predictability of benchmark settlement.