Indian equity markets saw an impressive start to the week with key benchmark indices the Nifty and the Sensex gaining over two percent each on Tuesday. The BSE Sensex ended at 50,136 up 1128 points or 2.3%. The Nifty closed at 14,845, up 338 points or 2.3%. This broad-based rally, which was also aided by supportive global cues, saw most sectoral indices give positive returns on Tuesday.