Market rally today: Sensex rose 637 pts to 76,696 and Nifty gained 197 pts to 23,964. Stocks such as IndiGo, Asian Paints, Bajaj Finance, Infosys, Eternal, HUL, Bajaj Finserv, ITC and Tech Mahindra were the top Sensex gainers today, rising up to 3.15%.