New Delhi, Jan 24 (ANI): Trading at the Bombay Stock Exchange today closed 240.10 points down to stand at 21133.56. At the National Stock Exchange the Nifty closed 78.90 points up to stand at 6,266.75. Bharti Infratel and Mahindra and Mahindra Financial were among the top gainers of Group A with an increase of 2.50% and 2.40% along with Dabur India and Asian Paints Ltd. with an increase of 1.17% and 1.11% respectively, while the top losers of Group A include Ranbaxy Lab and Canara Bank with a decrease of 19.33% and 6.67% along with Biocon and Oriental Bank with a decrease of 5.61% and 5.48% at the close of the markets. The Auto sector is down 191.16 points at 11,953.12while the banking sector is down 240.70 points at 12,556.16 and the realty sector is down 43.02 points at 1,307.17. The Indian currency is up 0.28% at Rs 62.38per dollar.