The Pakistan Stock Exchange (PSX) entered Friday on a positive note, building on its recent gains as global markets benefitted from widespread monetary easing. By 9:35am, the benchmark KSE-100 Index had gained 434.22 points, or 0.27%, to trade at 158,387.68 points. Buying appetite was visible in banking, energy, and refinery stocks, where heavyweights including OGDC,…