Benchmark index Sensex jumped 676 points, closing at 81,273, while Nifty neared the 24,900 level, jumping 245.65 points on Monday. Maruti Suzuki, Bajaj Finance and UltraTech Cement emerged as top gainers. ITC, Eternal and Tech Mahindra were among the losers. Sensex rose over 1,100 points in Monday's early trade, days after the government announced a GST reduction on multiple products.