Seoul's Kospi Index Plummets 10 Percent as Semiconductor Giants Lead Asian Tech Selloff

South Korea's benchmark Kospi index fell 10 percent Tuesday, with semiconductor leaders Samsung and SK Hynix each declining more than 12 percent, extending a tech-driven sell-off across Asia. The losses wiped away gains from Monday's record close and sparked concerns among analysts that aggressive position reduction among institutional and foreign investors could continue. The broader Asian market decline followed sharp drops in technology stocks on Wall Street, where the Nasdaq fell more than one percent and major firms including Amazon, Nvidia, and Microsoft experienced significant losses.

Semiconductor Stocks Drive the Decline

The Kospi's sharp descent centered on South Korea's chip sector, which has benefited substantially from the artificial intelligence investment surge. SK Hynix and Samsung, the index's heaviest-weighted components, dropped more than 12 percent each, according to market data. This pullback appeared particularly aggressive given that both companies had contributed to the Kospi reaching record highs just one trading day earlier.

Analysts attributed the severe sell-off to excessive valuation gains accumulated too quickly. Joo Won, head of the economic research division at Hyundai Research Institute, characterized the decline as reflecting overextension rather than fundamental weakness. He noted that semiconductor stocks had "risen too far, too fast," prompting both foreign investors and domestic institutions to aggressively reduce holdings. Won suggested the selling pressure could continue, as investors who accumulated substantial gains during the recent rally may prioritize cashing out before reassessing market conditions.

Contagion Spreads Across Asia and Beyond

The selloff extended far beyond South Korea. Tokyo's Nikkei Index fell 3.6 percent, with SoftBank declining more than 10 percent and chipmaker Tokyo Electron losing 6.2 percent. Hong Kong dropped over two percent, while Shanghai and Taipei experienced strong selling pressure. Markets in Sydney, Singapore, Wellington, Mumbai, Bangkok, and Jakarta all recorded sharp declines. European exchanges opened lower, with London, Paris, and Frankfurt trading on the back foot.

The cascade of losses reflected broader investor hesitation about technology valuations following the recent artificial intelligence-fueled market rally. Traders struggled to maintain momentum despite signs of progress in Middle East peace negotiations, which had initially supported oil prices and market sentiment. The combination of profit-taking among technology investors and uncertainty about the sustainability of AI-driven gains created a challenging environment across multiple regional markets.