South Korea’s KOSPI index suffered a severe shock on Monday, 8th June, plunging more than 8% in early trading and triggering an automatic 20‑minute circuit breaker as panic selling swept through the market.
The index briefly fell to the mid‑7,400s, marking its third circuit‑breaker event of the year and underscoring the fragility of sentiment after a sharp global tech sell‑off.
Semiconductor heavyweights led the rout. Samsung Electronics slumped more than 8.5%, while SK Hynix dropped over 7%, with additional steep losses across major industrial names including LG Electronics, Hyundai Motor and Samsung SDI.
The sell‑off mirrored a sharp downturn in U.S. markets the previous Friday 5th June 2026, where semiconductor giants such as Nvidia, Broadcom and Micron were hit hard, fuelling fears that the AI‑driven rally had overheated.
A hotter‑than‑expected U.S. jobs report also stoked concerns that the Federal Reserve may lean towards further rate hikes, adding to the risk‑off mood.
Currency markets reflected the stress: the Korean won weakened sharply to around 1,554 per dollar as foreign investors accelerated withdrawals.
Although local institutions and retail investors later stepped in to “buy the dip,” helping trim some losses, the episode highlighted the market’s vulnerability to global tech sentiment and shifting U.S. rate expectations.
