South Korean Stocks Plunge Amid Tech Rout

South Korean stocks tumbled nearly 4 percent Thursday, Feb. 5, 2026, as the KOSPI fell 207.53 points to 5,163.57 amid heavy selling of large-cap tech names. Major semiconductors including Samsung Electronics and SK hynix dropped 5.8% and 6.44%, respectively, while foreigners sold about 5 trillion won and the won weakened to 1,469 per dollar. The move reflects contagion from U.S. tech valuation concerns tied to AI profitability.