Sensex, Nifty, updates on November 21, 2024: Indian benchmark indices opened lower on Thursday, following weak global cues. The Sensex dropped 425.83 points or 0.55 per cent to 77,152.55, and the Nifty declined 156.50 points or 0.67 per cent to 23,362.00. Top gainers on the NSE at 12 pm were Power Grid (2.06%), Hindalco (1.74%), Axis Bank (1.27%), Tata Steel (1.14%), and Grasim (0.96%), while top losers included Adani Enterprises (-19.59%), Adani Ports (-16.49%), SBI (-3.11%), SBI Life (-2.78%), and Britannia (-2.38%). Adani Group stocks in focus: All Gautam Adani-led stocks plunge at 1.15 pm: Adani Energy Solutions (-20%), Adani Enterprises (-18.80%), Adani Green Energy (-17.54%), Adani Ports & SEZ (-12.38%), Adani Total Gas (-12.17%), Adani Power (-11.06%), Adani Wilmar (-10%), Ambuja Cement (-10.24%), ACC (-7.14%), NDTV (-7.90%).