South Korea's KOSPI fell 9.99% on June 8, 2026, its worst session since March, as US jobs data sparked a global tech selloff hitting Samsung and SK Hynix

South Korea's KOSPI index plunged 8.3% as Samsung and SK Hynix led a semiconductor sell-off, triggering circuit breakers for the third time in 2026.

South Korean stocks experienced a sharp decline of over 4% on Tuesday, with the KOSPI index plummeting as investors cashed in on recent gains in chipmaker shares. Major players…