Why SK Hynix (SKHX) fell 3.86%
SK Hynix (SKHX) fell 3.86% on October 7, 2026 — Trump's 300% tariff threat hits Korea stocks.
What happened
Trump threatened tariffs up to 300% on Korea, and foreign investors sold W20.3 trillion in Korean stocks, including SK Hynix, as tariff risk and capex uncertainty hit the memory-chip narrative.
Why it moved
SK Hynix (SKHX) depends on US markets for HBM and DRAM revenue; tariff threats raise input costs, lower demand visibility, and weaken the won, all pressuring margins and growth forecasts.
Why it matters
Samsung and SK Hynix anchored Korea Tech on AI-chip and HBM tailwinds, but tariff shock exposes export exposure and capex risk, deflating the premium valuation the theme had earned.
What would break the thesis
If tariffs are delayed or exempted for semiconductors, or if Korea commits to larger US capex, the hit reverses; if tariffs widen and stick, memory demand and pricing face a structural reset.