The Sensex surged by about 322 points and ended the day at 13,178. It touched a high of 13,194 after opening about 48 points higher at 12,904. Looks like the punters are very active in the Indian Stock Markets, before the Infosys results. Volatility is expected to increase till Infosys comes out with its results. Infi results would give direction to the, otherwise volatile Indian stock markets.