BSE shares rose up to 4% on October 26 to emerge as top Nifty gainer as brokerage Motilal Oswal Financial Services Ltd upgraded the stock to 'Buy' and gave target price of Rs 4,000, which implies  up to 24% upside. "BSE’s F&O notional ADTO (Average Daily Turnover) surged 85% in Oct’26MTD vs. the post-CAS reset in Aug’26 (-34% MoM). With the partial CAS reversal effective 7-Dec-26, the recovery has a regulatory catalyst beyond the current volatility-led spike.