The 30-share BSE Sensex dropped 242.01 points to 79,874.48 in early trade, while the NSE Nifty slipped 72.3 points to 24,256.65. This comes after a strong seven-day rally, during which the Sensex surged by 6,269.34 points (8.48%) and the Nifty advanced 1,929.8 points (8.61%).