Mumbai: Equity benchmark Sensex surged 318 points to end at its new lifetime high on Thursday, tracking gains in ICICI Bank, L&T and Tech Mahindra. The 30-share index ended 318.05 points or 0.58 per cent higher at its all-time peak of 54,843.98. The broader NSE Nifty advanced 82.15 points or 0.26 per cent to record 16,325.15. […]