New Delhi, Dec 23 (ANI): Trading at the Bombay Stock Exchange today closed 21.31 points up to stand at 21,101.03. At the National Stock Exchange the Nifty closed 10.25 points up to stand at 6,284.50. HDIL and Biocon were among the top gainers of Group A with an increase of 7.76% and 6.68% along with L&T Finance Holdings and Jaypee Infratech Ltd with an increase of 6.54% and 6.29% respectively, while the top losers of Group A include United Breweries Ltd and Motherson Sumi Systems with a decrease of 5.28% and 4.21% along with United Spirits and Bharti Infratel with a decrease of 3.65% and 2.81% at the close of the markets. The Auto sector is up 27.92 points at 12,385.17 while the banking sector is up 102.93 points at 12,993.46 and the realty sector is up 44.45 points at 1,450.76. The Indian currency is up 0.34% at Rs 61.83 per dollar.