Samsung Electronics shares plunged 17.8% from Monday to Friday, falling from 262,000 won to 215,500 won ($195 to $160), marking its sharpest weekly drop since the 2008 global financial crisis. SK hynix also experienced its steepest weekly decline since 2008. The sell-off was driven by record foreign selling amid concerns over US interest rates, an AI investment bubble, and intensifying competition from Chinese memory chipmakers.