The Sensex at the Bombay Stock Exchange gained 119 points, to 17,679 in opening trade, this morning, on fresh buying by investors, amid firm regional bourses. But later, the Sensex turned very volatile. So after surrendering all its initial gains, the Sensex then swung between positive and negative territory, and stood 20 points, or 0.1 percent in the negative zone, at 17,540 in afternoon deals, a short while ago. Other Asian markets in China, Japan, Hong Kong, Indonesia, South Korea, Singapore, and Taiwan were up by between 0.3 percent and 1.8 percent, today, after the Greek government won a crucial confidence vote, as it struggles to pursue reforms critical for a new euro-zone bailout package. The US Dow Jones Industrial Averaged had gained 0.9 per cent, overnight.