A trader can be seen at the Pakistan Stock Exchange building in Karachi. — PPI/FileKARACHI: The Pakistan Stock Exchange witnessed the highest single-day surge of 10,123 points on Monday following a surprise ceasefire between Pakistan and India, which invited investors for aggressive buying.The stock market halted for an hour, within 5 minutes of its opening, as the Index opened at 9.26 per cent positive. According to the exchange rule, trading will halt for an hour if KSE30 moves 5.0 per...