The Sensex surged 721.31 points to 79,765.05, while the Nifty rose 208.50 points to 24,122.70, driven by gains in auto, pharma, energy, and infrastructure stocks. However, PSU banks faced declines amid perplexing volatility in foreign institutional investor activity, with a significant sell-off of Rs 11,756 crores noted recently. Investors are advised to remain cautious as stock-specific actions are anticipated following the inclusion of 45 new stocks in the F&O list.