World shares mostly decline, with South Korea's Kospi down more than 5%
World shares mostly fell Friday after sharp U.S. declines in AI-related stocks. U.S. futures were mixed: S&P 500 -0.5%, Dow +0.1%. South Korea’s Kospi dropped 5.5% to 8,160.59, with SK Hynix -9.9% and Samsung -6.4%. Broadcom fell 12.6% after a forecast miss; Micron -7.7% and CrowdStrike -3.8%. Oil prices also eased.

Near-term sentiment headwind for AI infrastructure/semis tied to Broadcom’s guidance miss.
Broadcom shares sank 12.6% after its forecast missed expectations, reigniting AI/tech demand and earnings-risk concerns.
Likely continued volatility and multiple compression risk if sector read-through persists.
Background
The piece frames Friday’s global weakness as a continuation of Thursday’s U.S. AI/tech sell-off, with oil pressured by expectations around Strait of Hormuz access amid ongoing Middle East ceasefire uncertainty.
Why it matters
A forecast miss from a major AI/tech infrastructure name (Broadcom) is presented as the trigger, with subsequent read-through selling across U.S. semis, AI-adjacent cybersecurity, and Asia’s AI-exposed tech complex. Concurrent crude declines add a macro risk-off overlay.
Market relevance
Traders should treat this as a cross-asset risk-off impulse: AI/tech guidance risk in the U.S. is spilling into Asia, while oil weakness may further pressure inflation-sensitive sentiment.
Market effects
AI/semiconductor and AI-adjacent tech sentiment is weakening after a chip-forecast miss; memory and cybersecurity trade with the same risk-off impulse.
South Korea’s Kospi drops 5.5% with SK Hynix and Samsung down sharply; Japan tech leads declines; broader Asia de-risking likely spills into global tech beta.
Crude weakness tied to Strait of Hormuz negotiation expectations can pressure inflation hedges and risk assets globally.
Alternative perspectives
The sell-off may be positioning-driven after prior AI optimism; if oil stabilizes and earnings remain strong, the dip could be bought quickly.
The article notes tentative U.S.-Iran ceasefire extension and Lebanon ceasefire rejection—headline volatility could reverse oil and tech risk sentiment rapidly.
Key entities
- companyBroadcom
Forecast miss triggered a sharp 12.6% share drop and renewed AI/tech sector concerns.
- companyMicron Technology
Memory chip sell-off (-7.7%) occurred alongside the broader AI-related risk unwind.
- companyCrowdStrike Holdings
Cybersecurity stock fell (-3.8%) as investors dumped AI-related equities.
- commodityBrent crude
Down 0.8% to $94.23 as Strait of Hormuz risk is traded on negotiation expectations.



