South Korean Stocks Decline on US-Iran Tensions, Tech Sell-off
Analysis based on 8 articles · First reported Jun 10, 2026 · Last updated Jun 11, 2026
The South Korean stock market, particularly the KOSPI, experienced a sharp decline due to escalating geopolitical tensions between the United States and Iran, coupled with a significant tech sell-off on Wall Street driven by concerns over AI stock valuations. This dual impact led to widespread losses across major South Korean companies like Samsung Electronics and SK Hynix, and a weakening of the South Korea — South Korean won against the US dollar, reflecting a broad negative sentiment among investors.
South Korean stocks opened sharply lower due to a combination of escalating geopolitical tensions between the United States and Iran, and a significant tech sell-off on Wall Street. The United States launched new strikes on Iran in response to the shooting down of an American Apache helicopter in the Strait of Hormuz, with Iran threatening to fire on vessels in the strait. This geopolitical instability sapped investors' risk appetite. Concurrently, doubts over the valuation of artificial intelligence (AI) related stocks resurfaced following a disappointing earnings forecast from Broadcom and news that Crusoe Energy Systems suspended a project. Major US tech shares like Apple Inc., Micron Technology, and Nvidia experienced declines, which mirrored in South Korea's top tech companies such as Samsung Electronics and SK Hynix. The KOSPI saw substantial losses, and the South Korea — South Korean won weakened against the US dollar, indicating a broad negative impact on the South Korean financial markets.
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