Sensex fell 604.65 points to close at 77,544.63, while Nifty 50 declined 192.05 points to settle at 24,276. The sell-off was triggered by a dual blow: a sharp rally in crude oil prices and the unexpected resignation of Tata Sons Chairman N. Chandrasekaran. Nifty IT was the biggest sectoral loser, falling over 2%, followed by Nifty Realty, Nifty FMCG, Nifty Oil & Gas, and Nifty Auto. On the flip side, Nifty PSU Bank and Nifty Metal indices traded in the...