Risk-on sentiment powered Dalal Street ahead with benchmark indices soaring after US President Donald Trump announced a tentative ceasefire between Iran and Israel. The BSE Sensex index rose 938 points or 1.15 per cent in the intraday trade to hit a high of 82,835.3 during the day. The NSE Nifty50 advanced 278.9 points, or 1.12 per cent, to 25,250. The indices rose to their highest level since October last year.