Buying interest returned to the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index gaining nearly 2,600 points during the intraday trading on Thursday. At 11:15am, the benchmark index was hovering at 158,346.88, an increase of 2,569.67 points or 1.65%. Buying was observed in key sectors, including automobile assemblers, cement, commercial banks, oil and gas exploration companies