Korea's KOSPI index surges 12% as Samsung, SK Hynix rebound; South Korea's KOSPI, KOSDAQ jumps trigger program trading halt

Korea's KOSPI index surges 12% as Samsung, SK Hynix rebound; South Korea's KOSPI, KOSDAQ jumps trigger program trading halt

South Korea’s KOSPI Index Plunges 8% Amid Geopolitical Uncertainty, Triggering Trading Halts

South Korea’s benchmark KOSPI index plummeted over 8% on March 3, 2026, triggering circuit breakers and temporary trading suspensions as global markets grappled with escalating geopolitical tensions and economic uncertainties. The index, which includes heavyweights like Samsung Electronics and SK Hynix, fell to 5,322.93—a drop of 8.1% from the previous session’s close— prompting the Korea Exchange to halt trading for 20 minutes. The KOSDAQ, the country’s secondary market, also slid 8.13%, marking its first dual-circuit breaker activation since August 2024.

The sell-off was driven by a confluence of factors, including heightened risks from U.S.-Israel military actions in Iran, which disrupted global oil markets and pushed crude prices to 23% gains in a month. Additionally, uncertainty surrounding U.S. tariff policies—following a Supreme Court ruling that challenged President Trump’s emergency powers— added volatility to trade-dependent sectors like semiconductors. Samsung Electronics and SK Hynix, key components of the KOSPI, fell 9.88% and 11.5%, respectively, reflecting investor concerns over global demand and supply chain disruptions.

The KOSPI’s decline followed a 34% year-to-date surge, fueled by optimism around AI-driven chip demand and strong earnings from tech giants. However, the abrupt reversal underscored market fragility amid overlapping risks, including inflationary pressures from surging energy costs and the Federal Reserve’s constrained policy outlook. Analysts noted that such volatility is not uncommon, with corrections of 10% or more occurring roughly every 18 months.

While the immediate focus remains on geopolitical and trade developments, the episode highlights the interconnectedness of global markets. A sustained breakdown in regional stability or prolonged tariff disputes could further amplify risks for equities, particularly in export-reliant economies like South Korea.

Yahoo Finance: Korea Herald