KOSPI Extends 40% Decline as AI Investment Doubts Slam Korean Tech Stocks

The Quick Take

• South Korea's KOSPI extended its sharp decline, driven by doubts about AI investment returns and elevated semiconductor valuations
• Samsung Electronics and SK Hynix, which dominate the index, amplified losses due to their heavy weighting in KOSPI
• Financing risks in AI infrastructure spending and AI spending deceleration concerns rattled technology investors broadly

South Korea's KOSPI has entered a pronounced downward spiral, declining another 5% in the latest session and now sitting roughly 40% below its all-time high. The selloff is rooted in a reassessment of AI investment return timelines, as institutional investors question whether hyperscaler capex commitments can sustain the pace needed to justify current semiconductor valuations. South Korea's equity market is uniquely exposed to this narrative shift given that Samsung Electronics and SK Hynix together represent a disproportionate share of the index, meaning any AI demand skepticism hits the KOSPI harder than comparable global benchmarks.

The KOSPI rout creates a direct read-through for global semiconductor peers beyond South Korea: if institutional capital is rotating away from memory chip champions on AI spend doubts, the same logic pressures Micron, Qualcomm, and Intel in US markets. Capital outflows from Korean equities by foreign institutional investors also weigh on the South Korean won, adding a currency-risk dimension for global fund managers with Korean exposure. The financing risk narrative, driven by concerns about data center operators borrowing costs for AI infrastructure, is broadening from niche caution into sector-wide sentiment.

The thesis here hinges on whether next-quarter earnings from major hyperscalers — particularly AWS, Azure, and Google Cloud — confirm continued AI infrastructure capex growth or signal a pause. Samsung and SK Hynix are both reporting earnings in coming weeks; any guidance cut on HBM (high-bandwidth memory) demand would validate the KOSPI selloff and could deepen it further. Macro investors should also watch the Bank of Korea's policy response if won weakness accelerates, as rate stability is a precondition for the technology sector multiple recovery in Korean equities.

Synthesized from 1 source.