South Korea’s KOSPI index sank over 6% in a sharp sell-off led by major technology players Samsung Electronics and SK Hynix. Investors are rattled by fears that increased spending on artificial intelligence won’t pay off quickly, while looming U.S. tariffs threaten to cut into Korean export revenues.

Samsung and SK Hynix, which together account for a significant portion of the KOSPI’s market value, fell deeply as traders responded to worries over escalating costs tied to AI investments. At the same time, the possibility of new tariffs from the U.S. government adds pressure on South Korea’s export-driven economy, sparking concerns that trade tensions could worsen in the coming months.

Tech Giants Under Pressure

The combined effect of these headwinds has shaken confidence across the tech sector. Samsung recently expanded its crypto features within its wallet platform, aiming to capture new revenue streams, but such moves haven’t been enough to offset investor anxiety. Meanwhile, the wider market feels the ripple effects, with many betting on a cautious approach to growth amid geopolitical and economic uncertainties.

As of now, the outlook remains volatile. The tech sector, which had been a growth engine for the KOSPI, faces a crossroads: heavy AI investment raises hopes for future gains but also immediate risks. The added threat of tariffs targeting exports makes the near-term scenario even more challenging.