Shares of Taiwan Semiconductor Manufacturing slid 3.4% to $385.64 on July 28 after reports that a Chinese state-backed company has begun mass-producing homegrown chipmaking machines — a technology long monopolized by the West. The stock has now lost close to 15% of its value this month , despite posting record earnings just twelve days ago.
China Cracked a Lock on the Chip Supply Chain — Even If It's a Small One
A little-known Chinese state-owned firm, Shanghai Aishengna Electronic Technology Group, has begun producing immersion deep-ultraviolet (DUV) lithography machines — a type of tool crucial to printing chip circuits — after absorbing teams from several Chinese startups.
The machine targets 28-nanometer manufacturing in a single pass and could theoretically support chips as advanced as 5 nanometers through repeated patterning, though yields remain below industry-leading equipment.
Production is modest — five units in 2026, about 20 in 2027 — but the symbolism rattled investors who had assumed this breakthrough was years away.
The Selloff Went Global and Hit Hard
The news compounded worries about AI spending sustainability, sending a Bloomberg gauge of Asian semiconductor shares down 7.5% — its biggest decline since April 2025.
Samsung Electronics closed 13.4% lower, its worst day in almost two decades, while SK Hynix dropped 14.7%.
ASML and Nvidia each fell more than 4%. TSMC's five-session slide from $424.61 to $385.64 has erased roughly $200 billion in market value.
Five Machines vs. 130: The Numbers Still Favor TSMC
ASML expects to ship about 130 immersion DUV systems in 2026 , dwarfing China's initial five. Key components in the Chinese machines are reportedly still sourced from Japan , and delays among local suppliers have already slowed production this year. TSMC, meanwhile, just posted a 77% jump in quarterly profit and raised its full-year revenue growth outlook to above 40%. Its capital spending plan of $60–$64 billion for 2026 is larger than some countries' defense budgets.
The Real Risk Isn't Today — It's the Trajectory
China's domestic equipment self-sufficiency has surged to 35%, up from roughly 25% just two years ago.
Beijing now unofficially requires new chip factories to source at least 50% of equipment domestically to receive government approvals. For TSMC shareholders, the immediate financial threat is negligible. But the steady narrowing of the technology gap — combined with a stock already trading at 35.9 times earnings, well above its five-year median of 22.9 — means the margin for error on the world's most important chipmaker is razor-thin.