New Delhi, Sept 17 (ANI): Trading at the Bombay Stock Exchange today closed 138.78 points up to stand at 26,631.29. At the National Stock Exchange the Nifty closed 42.60 points up to stand at 7,975.50. NATIONALUM and ABB were among the top gainers of Group A with an increase of 7.35% and 6.18% along with PIPAVAV DEFENCE AND OFFSHORE ENG LTD. and BAJAJ FINSERV LTD. with an increase of 4.14% and 4.13% respectively, while the top losers of Group A include RCOM and SHRIRAM CITY UNION FINANCE LTD. with a decrease of 4.02% and 4.00% along with IRB and INDHOTEL with a decrease of 3.71% and 3.44% at the close of the markets. The Auto sector is up 178.74 points at 17,746.87 while the banking sector is down 7.73 points at 18,130.57 and the reality sector is up 8.62 points at 1,709.21. The Indian currency is down 0.17% at Rs 60.95 per dollar.