The Pakistan Stock Exchange on Tuesday began to recover as shares gained 622 points, a day after the index experienced losses. The benchmark KSE-100 index was up by 622.95, or 0.54 per cent, to stand at 115,532.43 at closing from the last close of 114,909.48.Yousuf M. Farooq, director research at Chase Securities, said, “The stock market has rebounded from yesterday as Asian markets recover.