South Korean stocks staged a sharp recovery after one of the most violent selloffs in recent memory, with the KOSPI index bouncing back as investors turned their attention from panic selling to something more grounded: chipmaker earnings.
The rebound, led by Samsung Electronics and SK Hynix, follows a period of extreme volatility that saw the KOSPI shed nearly 10% in a single session on June 23, dropping to 8,203.84. That decline was steep enough to trigger a 20-minute trading halt, a circuit breaker activated after concerns about overheated tech stocks and regulatory warnings sent traders scrambling for the exits.
The two stocks that move everything
Samsung Electronics and SK Hynix together account for over 50% of the index’s total market capitalization. When they move, the entire Korean market moves with them.
That concentration has been both a blessing and a curse in June 2026. Earlier in the month, on June 9, the KOSPI surged 8.2% in a single day. Samsung gained approximately 9.3%, while SK Hynix ripped higher by more than 15%. Then came the June 23 crash, where both stocks fell by more than 12% each, dragging the index down by 9.99%.
