NEW DELHI: Shares of infrastructure companies were trading in the red in Thursday's afternoon session.Shares of Vodafone Idea (down 5.67 per cent) , Reliance Infrastructure (down 5.00 per cent) , Bharti Airtel (down 2.97 per cent) and InterGlobe Aviation (down 1.48 per cent) were the top losers in the index.CG Power and Industrial Solutions (down 1.42 per cent) , CESC (down 1.39 per cent) , NTPC (down 1.03 per cent) and Tata Power Company (down 0.72 per cent) too were trading with losses.The Nifty Infrastructure index was trading 0.39 per cent down at 3312.50 around 02:07 pm.Benchmark NSE Nifty50 index was down 1.85 points at 11,997.25, while the BSE Sensex was up 20.15 points at 40,671.79.Among the 50 stocks in the Nifty index, 19 were trading in the green, while 31 were in the red.Shares of Vodafone Idea, YES Bank, ZEEL, NCC, SBI, SAIL, ICICI Bank, Bank of Baroda and UCO Bank were among the most traded shares on the NSE.