Buying rally continued at the Pakistan Stock Exchange (PSX), amid optimism over government measures to address the crippling circular debt, with the benchmark KSE-100 Index gaining over 500 points during the opening minutes of trading on Thursday. At 10:05am, the benchmark index was hovering at 158,758.04, a gain of 521.37 points or 0.33%. Buying momentum was observed in key sectors includin