The Sensex at the Bombay Stock Exchange rose 37 points, to 16,477 in opening trade, this morning, amid firm Asian markets. Gaining further ground, the Sensex stood 247 points, or 1.5 percent in the green, at, 16,688, a short while ago.Key stock indices in Hong Kong, South Korea, Taiwan and Singapore were up by between 0.1 percent and 1 percent.