New Delhi, March 21 (ANI): Trading at the Bombay Stock Exchange today closed 16.78 points up to stand at 21,756.87. At the National Stock Exchange the Nifty closed 10.10 points up to stand at 6,493.20. HDIL and Bosch were among the top gainers of Group A with an increase of 4.95% and 4.78% along with Suzlon Energy and Hindustan Copper Ltd. with an increase of 4.72% and 4.61% respectively, while the top losers of Group A include Mphasis and Indian Oil Corporation with a decrease of 3.62% and 3.26% along with Mangalore Refinery and Gujarat Mineral with a decrease of 3.13% and 2.82% at the close of the markets. The Auto sector is up 106.10 points at 12,749.95 while the banking sector is up 84.38 points at 13,810.25 and the realty sector is up 23.29 points at 1,368.29. The Indian currency is up 0.51% at Rs 61.03 per dollar.