Sensex jumped 2.3% on Friday to close at 75,527.95, 1695.40 points higher than the previous close, helping reverse earlier losses for the week. The rebound came after optimism around a potential US-Iran deal lifted sentiment across global markets. Bajaj Finance and Larsen & Toubro emerged as the top gainers, with both firms' shares surging 5.56% and 4.94%, respectively.