Lifting by rising global markets, the Sensex at the Bombay Stock Exchange zoomed 619 points, or 3.6 per cent, to 17,908 within the first five minutes of trade, this morning, on heavy buying by foreign funds, as the Euro-zone debt crisis eased.Later, after paring some of its initial gains, the Sensex still stood a hefty 457 points or 2.7 percent in positive territory, at 17,746, in afternoon trade, a short while ago.The 30-share Sensex has already rallied more than 500 points in the last three trading sessions.Stocks rallied across the globe, with the markets in Japan, China, Hong Kong, Indonesia, Singapore, South Korea and Taiwan adding between 0.5 percent and 1.9 percent, today, as an agreement by European leaders to help contain the euro zone's debt crisis improved sentiment.Over on Wall Street, the Dow Jones Industrial Average had surged 3 percent, overnight, on encouraging euro zone news, and on news that the US economy grew at 2.5 percent in the July to September quarter.