Keeping its upward trend, the BSE benchmark Sensex gained 129 points to trade at 19,648 this afternoon.Similarly, the wide-based National Stock Exchange Nifty was up by 32 points to 5,954.In Asia, Hong Kong's Hang Seng index down by 1.15 per cent, while Japan's Nikkei fell 1.94 per cent in early trade.The US Dow Jones Industrial Average ended 0.53 per cent higher in yesterday's trade.