At Close, the Sensex was up 1,335.05 points or 2.25% at 60,611.74, and the Nifty was up 382.90 points or 2.17% at 18,053.40, as the surprise merger announcement of HDFC and HDFC Bank catapulted the benchmark indices beyond key psychological levels on Monday.HDFC Bank, HDFC, Adani Ports, HDFC Life, and Kotak Mahindra Bank were among the top Nifty gainers. Infosys, Titan Company, and Tata Consumer Products were the top losers. About 2534 shares have advanced, 796 shares declined, and 118 shares are unchanged. Among sectors, the Nifty Financial Services index zoomed 4.5 percent, followed by the Nifty Bank index, up 4 percent. The Nifty IT index clocked the most tepid gains today, rising just 0.2 percent. The BSE MidCap and SmallCap indices were 1.34 percent and 1.7 percent, respectively.