Equity investors became poorer by Rs 14.60 lakh crore in five days of market slump amid mounting tensions in the Middle East and higher valuations of Indian stocks. Falling for the fifth day running, the 30-share BSE Sensex tanked 522.82 points, or 0.81%, to settle at 64,049.06. During the day, it dropped 659.72 points, or 1.02%, to 63,912.16. In five days, the BSE benchmark has plunged 2,379.03 points, or 3.58%.