Benchmark index Sensex rose over 1,100 points in early trade on Monday, days after PM Narendra Modi announced that the government will reduce GST on multiple products. While Sensex hit a high of 81,744.27, Nifty rose over 1.54% to hit an intraday high of 25,012.35 in early trade. The top gainers were Maruti Suzuki India, Bajaj Finance and UltraTech Cement.