Why SK Hynix (SKHX) fell 9.52%
SK Hynix (SKHX) fell 9.52% on November 5, 2026 — US delay on China chip-tool approval hits SK Hynix.
What happened
US officials have held up approval for American chipmaking equipment that SK Hynix needs to expand production in China, according to sources. The stock fell 4.6% on the news.
Why it moved
Blocked tool approvals put a direct cap on SK Hynix's ability to add China output, which slows its memory volume growth and pressures the earnings path.
Why it matters
SK Hynix is the anchor of the Korea Tech theme, where the HBM and AI memory upcycle lifted Korean chip names and the KOSPI for weeks.
What would break the thesis
If Washington grants the equipment approvals or signals a near-term exemption, the expansion delay fades and the move should reverse.