Tech Selloff Deepens as AI Debt Fears and US Inflation Concerns Drive KOSPI 8% Plunge

The Quick Take

• An accelerating AI-linked share selloff hit global markets as inflation fears and rate hike concerns spooked traders
• South Korea's KOSPI 200 fell more than 8% overnight, triggering circuit breakers as chip makers including Samsung faced steep declines
• SoftBank and other AI-infrastructure investors also plunged as markets questioned the sustainability of debt-financed AI buildout

A deepening selloff in AI-linked equities swept global markets as investors grew increasingly concerned about rising inflation and the prospect of further interest rate hikes weighing on the heavily indebted technology sector. South Korea's KOSPI 200 index, which has disproportionate exposure to memory-chip manufacturers, fell more than 8% overnight to a six-month closing low, with circuit breakers triggered at multiple points during trading. Samsung, the world's largest memory chip maker, faced severe selling pressure alongside SoftBank, whose Vision Fund's concentrated AI infrastructure positions became a focus of institutional de-risking.

The sell-off exposes a fundamental tension in the current AI investment cycle: the buildout of AI infrastructure has been substantially funded by debt, creating sensitivity to rising interest rates that equity valuations had not fully priced. When inflation expectations rise and rate hike fears return, the AI sector's leverage becomes a liability. For semiconductor companies specifically, the risk is a double-whammy: rising funding costs for data-center customers could slow AI capex growth, while higher-for-longer rates compress the multiples at which their equity trades. The magnitude of KOSPI's circuit-breaker-triggering decline signals a repricing of AI sector risk premia globally.

Watch for the Federal Reserve's next policy communication as the immediate catalyst: any signal that inflation is forcing a return to rate hikes — rather than cuts — would extend the AI sector selloff further. The macro variable is the trajectory of US and European inflation data: a sustained uptick in CPI above central bank targets would validate the market's de-risking thesis and potentially deepen the correction. Monitor memory chip pricing indices as a real-time demand signal for data center capex, since any softening there would confirm that AI spending is decelerating beyond just equity repricing.

Synthesized from 1 source.