European stocks drop 0.9% amid U.S.-Iran tensions escalation

European stocks fell on Monday, with the pan-European Stoxx 600 down 0.9%. The U.K.'s FTSE 100 index decreased by 0.4%, Germany's DAX dropped 1.3%, and France's CAC 40 was down almost 1.1%. These declines follow increased tensions between the U.S. and Iran, including the seizure of an Iranian vessel. The situation is critical as the ceasefire between the two nations is set to expire this week, raising concerns over potential further market impacts.