Pakistan Stock Exchange (PSX) fell sharply on Thursday as renewed geopolitical tensions, a spike in global oil prices and profit-taking outweighed positive developments in the refinery sector. The benchmark KSE-100 index declined 1,733.57 points, or 1.01%, to settle at 170,498.95, reversing the previous session's gains. The market remained under pressure as Brent crude moved above $100 per barr