Positive momentum was observed at the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index gaining over 300 points during the opening hours of trading on Wednesday. At 10:45am, the benchmark index was hovering at 171,410.93, an increase of 337.20 points or 0.20%. Buying interest was seen in key sectors, including commercial banks, fertiliser, oil and gas exploration companies, OMC