Snapping three days of losses, the Sensex at the Bombay Stock Exchange gained 184 points, or 1 percent, to 18,596, amid rising Asian and European markets, on Wednesday. The Sensex had fallen more than 665 points in the last three trading sessions. The Nifty at the National Stock Exchange rose 59 points, or 1.1 percent, to 5,585.Stock markets in Japan, China, Hong Kong, South Korea, and Singapore advanced between 0.4 percent and 1.5 percent, on encouraging GDP data from China.