Buying interest was observed at the Pakistan Stock Exchange (PSX), with the benchmark KSE-100 Index gaining nearly 400 points during the opening minutes of trading on Wednesday. At 10:40am, the benchmark index was hovering at 180,771.69, up by 378.72 points or 0.21%. Buying was observed in key sectors, including cement, chemical, fertiliser, oil and gas exploration companies, OMCs and power