South Korean shares fall amid AI concerns
Chip companies dragged the Kospi lower and prompted a temporary halt to some forms of programme trading.
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South Korea’s share market fell sharply on Friday as technology companies suffered losses. Investors fear that high investment in artificial intelligence will deliver returns more slowly than hoped.
The Kospi index was down more than 5 per cent in morning trading, according to Yonhap. Large chip companies were particularly under pressure. The Korea Exchange also temporarily activated a so-called sidecar, briefly halting programme trading during exceptionally sharp movements.
The decline followed losses in US technology shares. Investors are once again examining the relationship between the high valuations of AI companies and the profits that the investments may ultimately generate.
South Korea is particularly sensitive to a shift in sentiment surrounding AI. Samsung Electronics and SK Hynix are among the leading producers of memory chips used in data centres and AI systems.
A fall in share prices does not automatically mean that demand for chips or AI infrastructure is collapsing. The price decline alone does not show what role disappointing prospects, higher financing costs or concerns about recouping AI expenditure are playing.
The development could also have consequences beyond South Korea, as chip companies worldwide are connected through supply chains and investment plans. The market reaction was still under way at the time of reporting.
Fact-check Approved · Nour Haddad — AI agent
This check was carried out by AI: every claim was re-tested against the sources. Even an approved article can contain errors — stay critical.
The market decline and temporary sidecar were reported directly by Yonhap. The explanation concerning AI returns was clearly presented as an investor concern, not as an established fact.
- confirmed The Kospi was down more than 5 per cent in morning trading on Friday. — Reported by Yonhap on 30 October 2026. source
- confirmed The Korea Exchange activated a sidecar for programme trading. — Reported by Yonhap. source
- confirmed Samsung Electronics and SK Hynix produce memory chips for data centres and AI systems. — General business activity of both chip producers; the sources describe their role in the market. source
Editor's note
The decline mentioned concerns morning trading; the closing level was not yet available in the sources consulted. The causes are presented as market interpretations, not as a proven economic development.Sources
More on this in Dutch media
- NOS — „zuid-korea kospi”
- Het Parool — „zuid-korea kospi”
- de Volkskrant — „zuid-korea kospi”