The S&P BSE Power index was down with most of its components trading lower in Wednesday's session. Shares of Suzlon Energy, CG Power and Industrial Solutions, Reliance Infrastructure and JSW Energy were the top losers in the index. GMR Infrastructure, Bharat Heavy Electricals, NTPC and NHPC too were trading with losses. The S&P BSE Power index was trading 0.52 per cent down at 2016.44 around 11:45 am. Benchmark NSE Nifty50 index was down 7.15 points at 11,921.60 while the BSE Sensex was down 22.38 points at 39,727.35. Among the 50 stocks in the Nifty index, 20 were trading in the green, while 30 were in the red. Shares of PC Jeweller, Spicejet, Adani Power, Equitas Holdings, YES Bank, PNB, Suzlon Energy, Vodafone Idea, Rail Vikas Nigam and DHFL were among the most traded shares on the NSE.