South Korea's Kospi tumbles 6% as SK Hynix slide, AI spending worries trigger chip selloff

South Korea's Kospi index fell sharply on Wednesday, with SK Hynix earnings disappointing investors and triggering a broad chipmaker selloff across Asia-Pacific markets. This contagion effect suggests weakening demand signals within the semiconductor supply chain, potentially indicating softer pricing power and inventory normalization concerns across memory chip producers globally.

The 6% decline in the Kospi reflects broader anxiety about AI spending sustainability and whether current capital expenditure cycles can justify elevated valuations in the sector. US-listed semiconductor peers like AMD, MU, and AMAT face correlation pressure as international earnings reports validate concerns about margin compression and oversupply in key product lines. Earnings misses abroad often precede domestic guidance resets.

This selloff carries implications for Tech sector momentum indicators, which have priced in aggressive AI buildout assumptions. A reversal in international chip sentiment could accelerate profit-taking in high-valuation semiconductor stocks and equipment makers that rely on cyclical capex spending. The magnitude of the Korean market move (6%) suggests institutional positioning shifts rather than isolated company-specific weakness.

Sector implication: Technology faces renewed downside pressure if Asian earnings confirm demand deceleration. Equipment suppliers and memory chip manufacturers show heightened vulnerability to macro disappointment and potential multiple compression in the near term.