Buying was observed at the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index gaining over 600 points during the opening minutes of trading on Wednesday. At 9:35am, the benchmark index was hovering at 169,561.27, a gain of 645.05 points or 0.38%. Buying was observed in key sectors, including automobile assemblers, cement, commercial banks, oil and gas exploration companies, OMCs