SEOUL, June 23 : South Korea's KOSPI plummeted 9.99 per cent, its steepest drop in more than three months, on Tuesday as overseas investors sold chipmakers following regulatory signals that the sector's rally had gotten overheated.The benchmark KOSPI closed down 910.71 points, its biggest daily plunge since M

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…