New Delhi, Dec 4 (ANI): Trading at the Bombay Stock Exchange today closed 248.51 points down to stand at 25,638.11. At the National Stock Exchange the Nifty closed 82.25 points down to stand at 7,781.90. Bayer Cropscience Ltd and Sun Pharma Advanced Research Company Ltd were among the top gainers of group A with an increase of 5.12% and 4.89% along with Thermax Ltd and Sun Pharmaceutical Industries Ltd with an increase of 4.10% and 4.02% respectively, while the top losers of group A includes GMR Infrastructure Ltd and JK Lakshmi Cement Ltd with a decrease of 14.64% and 5.82% along with Firstsource Solutions Ltd and Just Dial Ltd with a decrease of 4.92% and 4.83% at the close of the markets. The Auto sector is up 207.96 points at 18480.13 while the Banking sector is up 213.38 points at 19325.36 and the Realty sector is up 18.33 points at 1335.65. The Indian currency was 0.27% up at Rs 66.83 per dollar.