The Sensex at the Bombay Stock Exchange was up by 184 points during noon. The 30-share index opened on positive notes with 73 points in green and kept it upward trend by trading at 18725 with 184 points up.The Nifty at the National Stock Exchange also rose by nearly 52 points to 5,642.In Asia, Hong Kong's Hang Seng index was down 0.19 per cent and Japan's Nikkei rose 0.65 per cent in early trade. The US Dow Jones Industrial Average ended 0.94 per cent lower in yesterday's trade.