South Korea's benchmark KOSPI index dropped 5% Friday, tracking a sharp selloff in technology stocks that rippled across Asia-Pacific exchanges. The decline reflects a broader rotation away from artificial intelligence-linked semiconductor names that had dominated market leadership.

The move stands out for its paradox. While the Dow Jones Industrial Average hit a record close, the rally relied on a shift into old-economy stocks and away from the mega-cap tech names that powered 2024 gains. Nvidia, semiconductor peers, and other chip-heavy positions faced selling pressure on Wall Street, and that selling immediately transmitted to Seoul.

South Korea's tech-heavy market bore the brunt because the country's equity structure concentrates heavily in semiconductors and electronics manufacturers. Samsung Electronics and SK Hynix, both critical to global chip supply, faced institutional outflows as investors reassessed valuations in the AI trade.

The KOSPI's 5% drop signals growing concern about valuations in semiconductor stocks after their extended rally. Investors rotated into cyclical plays and dividend-paying stocks, a shift that benefits industrial names and financial stocks but punishes the momentum darlings of recent quarters.

This rotation reflects a broader market psychology shift. The Dow's record close came as investors perceived value in areas left behind during the AI boom. Meanwhile, those betting on near-term semiconductor strength face headwinds from profit-taking and questions about whether current AI spending forecasts justify current multiples.

Asia-Pacific traders watched the rotation unfold and acted quickly. Markets in Japan, Australia, and other hubs also declined as investors reassessed their tech exposure. The South Korean market's 5% loss underscores how concentrated the country's economy is in semiconductors and how vulnerable it becomes to sudden repricing in that sector.

The selloff raises questions about sustainability of the AI narrative that lifted valuations throughout 2024. Institutional investors