The BSE benchmark Sensex fell nearly 208 points and Infosys tanked over 7 per cent. The markets also witnessed intense selling pressure in recent gainers. The Sensex plunged by 207.75 points or 0.65 per cent to 31,587.711. IT, teck, bank, healthcare, metal, auto and realty, tumbling up to 2.43 per cent. Infosys tanked over 7% after Vishal Sikka resigned as MD and CEO of Infosys. The rupee edged lower by two paise to 64.17 against the US dollar.