Extending its two-session winning streak, the Sensex at the Bombay Stock Exchange rose 116 points, to again cross the psychological 20,000-mark in opening trade, this morning, on broad-based buying by investors. After gaining further ground, the Sensex stood 159 points, or 0.8 percent in the green, at 20,048, a short while ago. Reports of higher advance tax payment by leading Indian companies, and firm Asian stocks supported the domestic bourses. Stock markets in Japan, China, Hong Kong, South Korea, Singapore, Taiwan, Malaysia and Indonesia were up by between 0.5 percent and 1.8 percent, as risk appetite improved after tensions eased on the Korean peninsula, and on broad overnight gains on Wall Street.