The Sensex at the Bombay Stock Exchange that shot up 619 points in opening trade stood over 424 points up at 17713, a short while ago. The surge in the markets were driven by brisk buying by foreign funds, triggered by easing euro-zone debt crisis and indications by the RBI, that it may pause rate hikes.The wide-based National Stock Exchange index Nifty too was trading 128 points up at 5,330.