New Delhi, Jan 17 (ANI): Trading at the Bombay Stock Exchange today closed 187.51 points down to stand at 21,077.67. At the National Stock Exchange the Nifty closed 48.20 points down to stand at 6,270.70. Indian Oil Corp and HPCL were among the top gainers of Group A with an increase of 6.08% and 4.61% along with BPCL and Reliance Communications with an increase of 2.63% and 2.59% respectively, while the top losers of Group A include MCX and TCS with a decrease of 6.13% and 5.59% along with Tech Mahindra and Financial Tech with a decrease of 5.03% and 4.99% at the close of the markets. The Auto sector is down 12.65 points at 12,011.22 while the banking sector is down 184.03 points at 12,496.49 and the realty sector is down 32.62 points at 1,326.43. The Indian currency is up 0.18% at Rs 61.43 per dollar.