The Sensex at the Bombay Stock Exchange gained 139 points, to cross the 17,000 mark, at 17,066, on robust economic growth for the second quarter, and amid firm global markets, today. Remaining firm, the Sensex stood 150 points, or 0.9 percent in the green, at 17,077, a short while ago. The Nifty at the National Stock Exchange rose 56 points, to 5,088.Elsewhere in Asia, Hong Kong's Hang Seng index was up 0.7 per cent, and Japan's Nikkei rose 1.8 per cent in morning trade, today. The US Dow Jones Industrial Average had gained 0.3 per cent overnight.