Bears returned to the trading floor of the Pakistan Stock Exchange (PSX) on Thursday as shares traded in the red and lost more than 500 points. According to the PSX website, the KSE-100 index closed at 64,298 points, down 524.43 or 0.81 per cent, from the previous close of 64,822.43. The index had previously maintained an upward trajectory on expectations of measures aimed at addressing econ