BSE Sensex jumped over 940 points to close at 77,958.52 on Wednesday, while Nifty 50 closed at 24,330.95 after jumping nearly 300 points. The indices staged a strong late-afternoon rally, primarily driven by hopes of a US-Iran peace deal, which led to a nearly 7% slump in Brent Crude prices. IndiGo, Trent, and Asian Paints were among the top gainers.