Equity benchmark Sensex plunged 740 points on Thursday, dragged by losses in index majors Reliance Industries, Infosys and HDFC Bank as monthly derivatives expired amid weak cues from global markets. The 30-share BSE index ended 740.19 points or 1.51 per cent lower at 48,440.12, and the broader NSE Nifty declined 224.50 points or 1.54 per cent to 14,324.90.
