The Sensex at the Bombay Stock Exchange rose a modest 33 points, or 0.2 percent, to 18,611, on investors booking profits at higher levels, on Wednesday. The Nifty at the National Stock Exchange gained 12 points, or 0.2 percent, to 5,660. Stock markets in Japan, China, Hong Kong, and South Korea rose between 0.3 percent and 1.2 percen