Bears dominated on the trade floor as shares at the Pakistan Stock Exchange (PSX) traded in the red and lost more than 500 points on Tuesday. According to the PSX website, the KSE-100 index lost 719.12, or 1.12 per cent, at 11:04am to stand at 63,550.25. The index closed at 63,737.46, down by 531.91points, from the previous close of 64,269.37. Yousuf M. Farooq, director of research at Cha