The Sensex at the Bombay Stock Exchange rose 61 points, or 0.4 per cent, to 17,126 within the first few minutes of trade, this morning, on continued buying interest, amid rising Asian markets. Later, the Sensex gave up all its initial gains, to briefly slip into negative territory, before again rebounding to stand 115 points, or 0.7 percent in the positive zone, at 17,180, in very volatile trade, a short while ago. The 30-share Sensex had gained more than 350 points in the past two trading sessions. Asian markets in South Korea, Singapore, Taiwan, Japan, and Indonesia were up by between 0.1 percent and 0.7 percent, in volatile trade, today. The US Dow Jones Industrial Average had surged 2.5 per cent, overnight.