South Korea’s Kospi Plummets 6.1% Amid Escalating Iran Conflict Fears

South Korea’s stock market plunged Wednesday, with the Kospi index falling as much as 6.1%—its steepest intraday drop since early 2022—amid escalating geopolitical risks tied to Iran's military posturing in the Middle East. The sharp selloff reflected growing investor anxiety over potential disruptions to global supply chains, particularly affecting South Korea’s semiconductor and defense export sectors, which are deeply embedded in international trade networks. The crisis unfolded as Iran intensified rhetoric following missile tests and regional military maneuvers, raising fears of broader conflict in the Persian Gulf. As risk sentiment evaporated, global markets reacted swiftly: crude oil prices spiked, with Brent crude futures (CL=F) climbing over 4% to exceed $98 per barrel, while Exxon Mobil (XOM) shares rose 2.3% on supply disruption concerns. Meanwhile, South Korea’s semiconductor exporters, including major chipmakers linked to the Kospi, saw their valuations erode as investors priced in potential export delays and increased logistics costs. The Kospi's 6.1% drop marks a significant reversal from recent months of AI-driven gains, during which tech stocks had fueled a 12% rally in the index from late 2025. The sudden correction underscores the fragility of market sentiment when geopolitical risks overshadow technological optimism. Defense contractors and supply chain-dependent firms registered the steepest losses, with several defense-related stocks down more than 8% in early trading. The sell-off reverberated across global markets, with Asian equities and U.S. tech futures posting modest declines. Investors are now recalibrating exposure to markets with high export dependence and strategic vulnerabilities, particularly in energy and technology sectors.