BSE shares tumble 5% after Jefferies downgrades stock to Underperform. Here’s why

BSE shares fell sharply on Monday after Jefferies downgraded the stock and cut its target price to Rs 2,940, citing risks from proprietary trading activity, STT changes, RBI bank guarantee norms and the Closing Auction Session. The brokerage also lowered earnings estimates, despite BSE’s strong Q1FY27 profit and revenue growth.