New Delhi, July 31 (ANI): Trading at the Bombay Stock Exchange today closed 192.45 points down to stand at 25,894.97. At the National Stock Exchange the Nifty closed 70.10 points down to stand at 7,721.30. IRB Infra and Pipavav Defence were among the top gainers of Group A with an increase of 7.79% and 4.55% along with The Ramco Cements Limited and Aurobindo Pharma with an increase of 4.39% and 4.35% respectively, while the top losers of Group A include Cadila Health and Max India with a decrease of 4.02% and 3.30% along with Wockhardt and NTPC with a decrease of 3.18% and 3.01% at the close of the markets. The Auto sector is down 97.03 points at 15,490.71 while the banking sector is down 208.90 points 17,485.61 and the realty sector is up 5.56 points at 1,894.02. The Indian currency is down 0.66% at Rs 60.46 per dollar.