The Sensex at the Bombay Stock Exchange gained 139 points, to cross the 17,000 mark, at 17,066, on robust domestic economic growth in the second quarter, and amid rising global markets, today. Remaining firm, the Sensex stood 171 points, or 1 percent in the green, at 17,098, a short while ago. The Nifty at the National Stock Exchange rose 67 points, to 5,099.Elsewhere in Asia, Hong Kong's Hang Seng index was up 0.7 per cent, and Japan's Nikkei was up 1.8 per cent, today. The US Dow Jones Industrial Average had gained 0.3 per cent overnight.