AI memory demandforeign net buyinggeopolitical impactmarket rebound opportunitynew market leadersSamsung Electronics Q1 profit surgesemiconductor earnings beatssupply shortages 4 4월 2026 April 3, 2026 KOSPI Market Close Report 서울특별시 Yeouido Market Overview: Steady Recovery Amid Geopolitical Uncertainty On April 3, the KOSPI index closed t…