SK Hynix Shares Plunge 11% as Asia Tech Rout Follows US Chip Selloff

The Quick Take

• SK Hynix shares plunged 11% as a selloff in US chipmakers cascaded into Asian semiconductor stocks, triggering a broad Asia tech rout.
• The synchronized decline reflects how tightly coupled the global semiconductor supply chain has become, with US chip sentiment acting as the primary directional signal for Asian markets.
• TSMC earnings ahead of this session served as the flashpoint for cautious positioning, with investors paring exposure across the Asia chip complex before results.

Asian semiconductor stocks took a sharp hit Thursday as a selloff originating in US chipmakers spread through the region, with SK Hynix — South Korea's largest memory chip maker — leading losses with an 11% decline. The move follows sustained outperformance in Asia's chip sector tied to AI-driven HBM (high-bandwidth memory) demand, where SK Hynix has been a primary beneficiary. The magnitude of the pullback suggests investors trimmed richly valued AI-linked positions ahead of TSMC's quarterly results, seeking to de-risk before a catalyst that could either validate or challenge AI capex narratives that have underpinned the sector's 2025-2026 re-rating.

The 11% single-day move in SK Hynix carries cross-asset implications beyond Korea's KOSPI. Japanese chipmakers, Taiwan foundries, and Singapore-listed tech names all track closely to the HBM demand cycle SK Hynix represents. For global asset allocators, the selloff raises questions about whether AI infrastructure spending projections — the core thesis supporting premium chip valuations — are beginning to face scrutiny. The ripple effects extend to Korean won positioning (tech export-heavy Korea sees currency linked to chip sector health) and to component cost outlooks for AI server builders such as SMCI and Dell.

The key forward signal is TSMC's quarterly earnings and guidance on advanced node capacity utilization, which will confirm or challenge current HBM demand assumptions. A positive TSMC read could trigger a sharp mean-reversion rally in SK Hynix and peers. Conversely, any guidance caution on AI server demand cadence could extend the selloff into next week's trading. The macro variable: whether US technology sector earnings season — particularly cloud hyperscaler capex commentary from Microsoft and Alphabet — reinforces the AI infrastructure spending cycle that justifies current chip valuations.

Synthesized from 1 source.