Nvidia, AMD, SK Hynix, Micron Tumble Up to 9% as China DUV Lithography Claim Rattles Chip Sector

The Quick Take

• Semiconductor stocks including Nvidia, AMD, SK Hynix, and Micron fell up to 9% after a Chinese state-backed firm reportedly began mass-producing domestic DUV lithography machines
• The development fuelled fears that China's self-sufficient chipmaking capacity could reduce long-term demand for Western semiconductor equipment and advanced chips
• The sell-off hit leading US and South Korean chipmakers simultaneously, extending a broader semiconductor sector rout

A report that a Chinese state-backed entity has reportedly begun mass production of domestic deep ultraviolet lithography equipment struck at the heart of the Western semiconductor industry's competitive moat. DUV lithography is a foundational step in chipmaking, and ASML currently dominates this market globally. If Chinese manufacturers can credibly replicate DUV machines at scale—even if initially at lower precision than ASML's latest models—the addressable demand for Western equipment and advanced chips could materially shrink over the medium term, triggering the sharp repricing seen across the semiconductor complex.

The simultaneous sell-off in US names like Nvidia and AMD alongside South Korean memory giants SK Hynix and Micron reflects how interconnected the global chip supply chain has become. SK Hynix is particularly exposed as it supplies HBM memory to Nvidia's AI data-center GPUs; a slowdown in Chinese AI infrastructure demand would reduce Nvidia's GPU sales and cascade down to HBM orders. The event also undermines the strategic rationale of US export controls, which were designed partly to deny China the tools to advance domestically—if mass production is happening, the controls may require reassessment.

Investors should watch for ASML's next quarterly sales guidance to gauge whether its China revenue is already declining, and for any official US government response or updated export control framework. South Korea's KOSPI will remain sensitive to further China-related tech disclosures, given that Samsung and SK Hynix collectively represent a large share of the index. The macro variable that determines whether this thesis escalates is whether independent verification confirms the mass-production claim—a single report without corroboration could partially reverse the sell-off on a clarification.

Synthesized from 1 source.