AI Worries Send Asia’s Chip Stocks Tumbling

Something snapped in Seoul and Tokyo on Tuesday. The KOSPI cratered more than nine percent, its worst level since mid-April, and trading halted briefly as volatility circuit breakers kicked in. Japan wasn't spared either: the Nikkei fell as much as four percent, TOPIX dropped three. Chipmakers took the worst of it. SK Hynix lost up to 13 percent, Samsung around ten, Kioxia a brutal 18 percent, and equipment names like Tokyo Electron and Nikon each shed more than nine.

Two things collided to cause this. First, Nvidia's financing web is getting almost too big to parse. The company is chasing over $750 billion in fresh AI deals, including a $500 billion-plus tie-up with SK Group and talks about a $250 billion backstop so OpenAI can lease compute from a US data center project. Skeptics call it circular: Nvidia money flows out, then comes back as chip orders. Jensen Huang says that's overblown, that Nvidia's stake is a sliver of what customers actually need to raise. Markets weren't fully convinced — Nvidia stock dropped 5.3 percent Monday and the cost of insuring its debt against default ticked up. Second, a report claimed a Chinese state-backed firm has started mass-producing DUV lithography systems, the kind of gear that underpins chipmaking and has long been dominated by Japan and ASML. That's a slow-burn threat, not an overnight one, but it landed at exactly the wrong moment.

Meanwhile China's own markets shrugged it off. The Hang Seng actually rose 0.3 percent, and CXMT's strong Shanghai debut gave investors a reason to bet on Beijing's chip self-sufficiency push instead of panicking about it. That split — Chinese optimism against Korean and Japanese fear — says a lot about how differently investors are pricing geopolitical risk right now.

The timing couldn't be worse for the four hyperscalers reporting earnings this week. Microsoft and Meta post Wednesday, Apple and Amazon Thursday, right as everyone is asking whether the AI buildout is turning into actual revenue or just an ever-growing pile of debt. Microsoft alone has guided to roughly $190 billion in 2026 capex. Across Alphabet, Amazon, Meta, Microsoft and Oracle, debt-funded investment has jumped from nine percent to 32 percent of spending since 2024, and their combined borrowing now sits near $700 billion — before counting the roughly $1.65 trillion in off-balance-sheet