Sensex ends down 464pts at 9,584BS Reporter / Mumbai March 30, 2009, 15:32 ISTThe Sensex opened with a negative gap of 146 points at 9,902. Relentless selling in banking, metal and realty stocks saw the index slip lower as the day progressed.The Sensex touched a low of 9,521, and finally (provisional) ended with a loss of 464 points at 9,584.