Asia stocks tumble as KOSPI extends losses; AI shares drag regional markets
Asian markets fell as KOSPI extended losses, dropping 5.6% on renewed selling of AI-linked heavyweight tech shares. Samsung Electronics fell 7.2% and SK Hynix fell 7%, despite Samsung’s reported semiconductor profit jump and supply agreements. Japan and China also weakened. Oil eased after Trump said Strait of Hormuz talks begin, pressuring energy stocks.
How this was made

The 30-second read
Why it matters
Trading focus is on AI-linked semis/tech de-rating in Korea and Japan, with energy pressured by crude weakness and selective strength in China’s large-cap tech after an AI model launch.
Market read
For traders, the actionable signal is the market’s current sensitivity to AI-linked valuation concerns in Korea/Japan and oil headline risk, with Alibaba’s AI model launch acting as a counter-catalyst.
What to watch
The article cites easing Middle East tensions and firmer US futures as supports, which could limit downside if oil stabilizes and US tech earnings continue to buoy sentiment.
Background
The piece is a regional market wrap: Asia stocks extend losses, with KOSPI driven by AI-heavyweights, while oil reacts to Strait of Hormuz negotiation headlines and China shows relative resilience.
Ticker impact
KOSPI slid 5.6% as Samsung Electronics fell 7.2% after reporting a more than 250-fold jump in semiconductor profit and announcing multi-year data-centre supply agreements.
Near-term downside bias as AI valuation concerns are driving broad de-risking in heavyweight KOSPI AI/semis.
The move is attributed to investors resuming selling of AI heavyweight stocks, with Samsung singled out for a large single-day drop.
Alibaba surged more than 5% after unveiling a new flagship AI model, while Hang Seng edged 0.1% higher.
Short-term upside momentum likely for Alibaba if AI enthusiasm offsets valuation concerns.
A specific, attributable product event (flagship AI model) is cited alongside the magnitude of the move.
Tencent gained over 2% as the article notes resilience in Chinese markets despite weakness in technology shares.
Mild upside bias versus broader regional tech if China tech sentiment holds.
No Tencent-specific catalyst is provided in the text.
Market effects
AI-linked technology and semiconductor names are acting as the main transmission channel for regional risk-off, while energy is pressured by crude weakness.
Korea is the epicenter with KOSPI down 5.6% and semis leading; Japan and China show weaker but more mixed moves.
Oil headline risk around the Strait of Hormuz is feeding into energy equities and broader risk sentiment via crude and inflation expectations.
Counterpoint
The selloff may be more about AI valuation de-risking than deteriorating fundamentals, so dispersion (e.g., Kioxia, TDK, Alibaba) could widen rather than uniformly worsen.
Key entities
- indexKOSPI
South Korea’s benchmark fell 5.6% as AI heavyweight selling resumed.
- equitySamsung Electronics
Fell 7.2% despite reporting a more than 250-fold jump in semiconductor profit and announcing multi-year supply agreements.
- equitySK Hynix
Dropped 7% as investors reassessed record quarterly earnings versus elevated expectations.
- equityAlibaba
Surged more than 5% after unveiling a new flagship AI model.
- equityWoodside Energy
Fell about 3% as Brent crude extended losses tied to Strait of Hormuz negotiation hopes.



