Global Markets Slip as AI-Related Semiconductor Sell-off Deepens Amid U.S.–Iran Tensions

On Friday, equity markets worldwide posted sharp losses. In the United States, the technology-heavy NASDAQ fell 1.4% and the broader S&P 500 slipped 1.0%. European and Asian exchanges also retreated, with South Korea’s KOSPI dropping more than 6% and Japan’s Nikkei 225 shedding roughly 4%. The coordinated sell-off reflected heightened investor caution across regions.

The downturn was led by a pronounced sell-off in semiconductor stocks. Traders reduced exposure to chip makers amid growing doubts about the durability of the artificial-intelligence (AI) boom that has driven recent industry expansion. The rapid rotation away from semiconductor equities signaled that market participants are reassessing growth expectations for AI-related hardware.

The market weakness coincided with escalating hostilities between the United States and Iran. While the brief does not detail specific incidents, the mention of “America and Iran escalate attacks” suggests that geopolitical risk premiums were added to the broader risk-off sentiment, amplifying the pullback in equities.

• NASDAQ: –1.4%

• S&P 500: –1.0%

• South Korea KOSPI: > –6%

• Japan Nikkei 225: –?4%

• Primary driver: semiconductor share sell-off linked to AI-boom skepticism

The simultaneous decline across major indices and the sector-specific pressure on chips underscore a dual challenge: navigating both macro-geopolitical uncertainty and reassessing the valuation assumptions underpinning the AI-driven growth narrative. Analysts may look for further clarification on U.S.–Iran developments and monitor semiconductor earnings reports for signs of a sustained slowdown. Investors are likely to favor defensive assets until clarity emerges on both the geopolitical front and the longer-term trajectory of AI-related demand.