Basic materials stocks were trading with gains, with the S&P BSE Basic Materials index increasing 70.62 points or 1.44% at 4990.72 at 09:49 IST. Among the components of the S&P BSE Basic Materials index, Hindustan Copper Ltd (up 7.26%), Sunflag Iron & Steel Company Ltd (up 7.18%),Tata Steel BSL Ltd (up 7.17%),Vedanta Ltd (up 5.6%),Grauer & Weil (India) Ltd (up 5.56%), were the top gainers. Among the other gainers were Vikas Wsp Ltd (up 4.87%), National Aluminium Company Ltd (up 4.52%), Insecticides India Ltd (up 4.52%), Gravita India Ltd (up 4.5%), and Tata Steel Ltd (up 3.82%). On the ot...