Mumbai: Equity benchmark indices Sensex and Nifty surged in early trade on Monday amid sustained foreign fund inflows, a sharp drop in crude oil prices and firm trends in the US markets. The 30-share BSE benchmark gauge climbed 386.95 points to 80,888.94 in early trade. The NSE Nifty surged 114.05 points to 24,460.75. From the Sensex firms, Adani Ports, Asian Paints, Bajaj Finserv, Tata Consultancy Services, Infosys, HDFC Bank, Power Grid, HCL Tech, Titan and Tata Motors were among the ma