Trimming its initial gains, the Sensex at the Bombay Stock Exchange stood 69 points, or 0.4 percent in positive territory, at 19,498, in afternoon trade, amid considerable volatility, a short while ago. Earlier in the morning, the Sensex had opened with a stronger gain of 137 points, or 0.7 percent, at 19,566.Stock markets in Japan, Hong Kong, Singapore, Taiwan and South Korea had climbed between 0.4 percent and 3.4 percent, today.