Sensex at the Bombay Stock Exchange gained 184 points to trade at 21,079 points, a shortwhile ago. The 30-share index had lost nearly 345 points in the previous two sessions.The Nifty at the National Stock Exchange is also trading 51 points up at 6,265.In the Asian region, Hong Kong's Hang Seng index traded lower by 0.58 per cent and Japan's Nikkei Index fell 0.50 per cent in early trade.The US Dow Jones Industrial Average ended 0.82 per cent higher in yesterday's trade.