South Korean Markets Reel as KOSPI Recovers from Sharp Drop Amid U.S.-Iran Tensions and Won Weakness

South Korean financial markets endured a tumultuous session on March 27, 2026, as escalating U.S.-Iran tensions and Middle East instability triggered a dramatic early sell-off in equities and a sharp weakening of the Korean won. The KOSPI index plunged over 3% at the open, driven by overnight declines in U.S. markets and mixed signals from President Trump regarding Iran negotiations. However, the market staged a partial recovery by the close, while the won hovered near a 17-year low amid rising oil prices and concerns over energy supply disruptions. Investor sentiment remained cautious, with foreign investors leading net selling and policymakers weighing emergency responses to the ongoing crisis. Yonhap News Agency+3

📉 KOSPI’s Volatile Session: Sharp Drop and Partial Recovery

The KOSPI opened sharply lower, dropping 171.88 points (3.15%) to 5,288.58 amid heightened geopolitical risk and the closure of the Strait of Hormuz. Major stocks like Samsung Electronics and Hyundai Motor suffered significant early losses. However, the index recovered some ground during the day, closing at 5,438.87, down just 0.4%. Semiconductor stocks rebounded from earlier declines, and domestic investors stepped in to buy shares as foreign investors net sold 3.88 trillion won. Yonhap News Agency+3

💸 Korean Won Nears 17-Year Lows as Oil and Geopolitics Bite

The Korean won continued its slide, trading around 1,508.6–1,508.9 per dollar and reaching an intraday low of 1,517.3, its weakest level in 17 years. The currency’s decline was fueled by surging oil prices due to the Strait of Hormuz closure, persistent Middle East tensions, and lack of progress in U.S.-Iran talks. The won’s weakness raised concerns about inflation and capital outflows, amplifying market volatility. Yonhap News Agency+2

🛢️ Oil Price Surge, Foreign Outflows, and Policy Responses

Rising oil prices and energy supply fears weighed heavily on South Korean equities, particularly in the technology and automotive sectors. Foreign investors were net sellers throughout the session, while domestic investors provided some support. Policymakers discussed emergency measures, including fuel price caps and extra budgets, to mitigate the economic fallout from the crisis. The government also considered new energy policies to address the risks posed by ongoing Middle East instability. Yonhap News Agency+2

📰 Investor Sentiment and Broader Economic Impact

Investor sentiment remained fragile, shaped by mixed U.S. signals on Iran, the extension of a pause on strikes, and concerns about AI chip technology. While trading volumes were moderate, the focus remained on the government’s efforts to stabilize markets and address inflationary pressures. The crisis highlighted South Korea’s vulnerability as an export-driven economy reliant on energy imports and external stability, with the won’s weakness and oil price surge dominating headlines. Yonhap News Agency+2