The 30-share BSE Sensex surged 439.75 points to 83,624.55 in early trade, while the NSE Nifty rose 132.05 points to 25,547.85. Among the top gainers from the 30 Sensex firms were JSW Steel, Tata Steel, Mahindra & Mahindra, Larsen & Toubro, Bajaj Finserv, and Maruti.
