BSE Closing Auction Rule Creates Sensex-Nifty Divergence: What Traders Must Know
Indian stock markets have seen a growing divergence between the Sensex and Nifty indices following a change in BSE's price-discovery mechanism. Since August 3, the final closing price on BSE is determined through a closing auction session that ends at a random time between 3:28 pm and 3:30 pm. This randomised closing window was introduced to prevent last-minute price manipulation and improve fair price discovery. However, traders have noted that the mechanism is creating noticeable differences between Sensex and Nifty closing values. Market participants are being advised to factor in this structural change when executing end-of-day trades or strategies tied to index closing prices.
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