Buying interest returned at the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index gaining over 1,400 points during the opening hours of trading on Tuesday. At 11:25am, the benchmark index was hovering at 179,856.53, up by 1,441.74 points or 0.81%. Buying was observed in key sectors, including automobile assemblers, cement, commercial banks, oil and gas exploration companies, OM