Science & Tech: South Korean stocks collapse amid Asian tech
South Korean stocks fell sharply as investors unwound positions tied to the AI boom. The Kospi dropped more than 12% at one point, with SK hynix down about 20% and Samsung down over 12%. SK hynix’s April-June operating profit and revenue missed expectations despite net profit rising 1,242%. Other Asian chip stocks also declined.
How this was made

The 30-second read
Why it matters
It ties the latest SK hynix weakness to below-expectations April-June operating profit and revenue, while Samsung’s drop is part of the same regional semiconductor de-risking wave ahead of its earnings. It also highlights a macro overlay from the Fed meeting and geopolitical oil volatility.
Market read
Traders should treat this as a sector-wide de-risking signal for AI-linked semis, with company-specific earnings risk for Samsung and a clear catalyst for SK hynix.
What to watch
The article frames the move as expectation-driven, but it does not detail forward guidance, contract pricing, or inventory dynamics; those could quickly reverse sentiment if results show stabilization.
Background
The article describes a month-long battering of chip firms and a broader unwind of AI-related positioning, with South Korea’s Kospi extending prior steep losses.
Ticker impact
South Korea’s SK hynix plunged nearly 20% after April-June operating profit and revenue came in below expectations.
Near-term downside pressure likely persists until investors get clearer margin and guidance signals.
The article links the latest leg of selling directly to below-expectations operating profit and revenue, and frames the key debate as margins and guidance.
Samsung shares fell more than 12% as South Korean tech stocks extended Tuesday’s near-11% collapse.
Volatility likely remains elevated into the earnings release, with sentiment sensitive to guidance and margins.
The article attributes the move to the broader chip selloff and notes Samsung is due to report earnings Thursday, which can amplify reaction risk.
Tokyo Electron was about 12% lower as chip firms were hit across Asia amid AI demand skepticism.
Likely remains correlated to broader semiconductor sentiment until a fresh catalyst emerges.
No new Tokyo Electron-specific disclosure is included, only the sector selloff and the magnitude of the move.
Market effects
Repricing of AI-boom expectations is pressuring memory and semiconductor supply-chain names, increasing sensitivity to margins and guidance.
Korean and Japanese markets are leading declines, while Hong Kong and parts of Asia are relatively firmer, suggesting uneven risk appetite across tech exposures.
US and global chip sentiment may remain fragile as investors connect AI demand expectations to near-term financial results and guidance.
Counterpoint
The selloff may be overextended if the large net profit surge at SK hynix indicates underlying demand resilience, making the market’s focus on operating profit and revenue potentially too narrow.
Key entities
- companySK hynix
Memory supplier whose operating profit and revenue missed expectations, triggering a sharp selloff.
- companySamsung
Korean semiconductor bellwether falling sharply as the chip selloff deepens ahead of earnings.
- companyKioxia
Japanese memory chipmaker down sharply in the broader Asian tech decline.
- companyTokyo Electron
Japanese semiconductor equipment maker down sharply alongside the sector selloff.
- companyTSMC
Taiwanese chip heavyweight down as regional semis are repriced lower.



