The Pakistan Stock Exchange (PSX) benchmark KSE-100 index tumbled by over 2,400 points on Friday, breaking its four-day bullish spree. Falling oil prices following the signing of the ‘ Islamabad MoU ’ between the United States and Iran had fueled optimism, triggering buying interest across multiple sectors. As a result, the KSE-100 index had maintained its recovery for the fourth straight session on Thursday.