New Delhi, August 28 (ANI): Trading at the Bombay Stock Exchange today closed 77.96 points up to stand at 26,638.11. At the National Stock Exchange the Nifty closed 17.25 points up to stand at 7,953.30. NATIONAL ALUMINIUM CO LTD. and TATA COMMUNICATIONS LTD were among the top gainers of Group A with an increase of 8.37% and 5.08% along with GUJARAT MINERAL DEVELOPMENT CORPORATION LTD. and BHEL with an increase of 4.46% and 4.10% respectively, while the top losers of Group A include BHUSHAN STEEL LTD and IOB with a decrease of 4.97% and 4.80% along with JPPOWER and INDIAN BANK with a decrease of 4.70% and 4.69% at the close of the markets. The Auto sector is up 39.99 points at 17,289.97 while the banking sector is up 13.64 points at 18,003.68 and the reality sector is down 33.55 points at 1,727.44. The Indian currency is down 0.21% at Rs 60.58 per dollar.