The Indian equity benchmarks staged a gap up opening on Tuesday fuelled by gains in index heavyweights like Infosys, HDFC, Reliance Industries, ICICI Bank, HDFC Bank, Bajaj Finance and Tata Consultancy Services amid positive global cues. The Sensex rose as much as 411 points and Nifty 50 index touched an intraday high of 17,204. Global stock markets rose on Monday and oil prices eased as investors hailed strong U.S. holiday season sales and some grew less fearful about economic damage from the Omicron variant of COVID-19, news agency Reuters reported.