The S&P BSE Power index was trading 0.83 per cent down at 1983.19 on Friday with most of its components trading in the red.
Shares of CESC (down 4.80 per cent) , Tata Power Company NSE -4.74 % (down 3.62 per cent) , Adani Transmission (down 2.75 per cent) and Torrent Power (down 2.52 per cent) were trading under pressure.
Adani Power (down 2.02 per cent) , KEC International (down 1.38 per cent) and GMR Infrastructure (down 1.22 per cent) too were worst performers in the index.
Benchmark NSE Nifty50 index was down 167.05 points at 10,784.65 while BSE Sensex was down 551.38 points at 35,880.29.
Among the 50 stocks in the Nifty index, 5 were trading in the green, while 45 were in the red.
Shares of JP Associates, Reliance Communications, CG Power, YES Bank, PNB, Suzlon Energy, Infibeam Avenues, BEL, Tata Motors, Bharti Infratel, Vakrangee, Dewan Housing, SBI, Indian Oil Corp, IDFC Bank, ICICI Bank and Adani Power were among the most traded shares on the NSE