Korea's benchmark KOSPI index fell 6.3% in a single session, with the KS11 futures plunging over 700 points, as fears over regional instability triggered a flight to safety. The won weakened sharply to 1,448 per dollar, while oil prices surged on supply concerns.
- KOSPI dropped 6.3% on March 4, 2026, its largest single-day fall since 2020
- KS11 futures fell 728 points to 11,289 amid heightened risk aversion
- USD/KRW reached 1,448.50, reflecting capital outflows and currency weakness
- CL=F crude oil futures rose 4.7% to $89.30 per barrel amid supply fears
- Samsung Electronics lost 8.4%, Hyundai Motor dropped 9.1%, and tech sector fell 7.9%
- Interbank rates in Seoul rose 120 basis points, signaling liquidity stress
Korean equities plunged on March 4, 2026, as a sharp escalation in regional tensions prompted a widespread sell-off across the market. The KOSPI index dropped 6.3%, marking its steepest one-day decline since 2020, with the KS11 futures contract falling 728 points to close at 11,289. Financial and technology sectors were hardest hit, with Samsung Electronics shedding 8.4% and Hyundai Motor losing 9.1% amid growing concerns over export disruptions and supply chain risks. The sell-off was fueled by a surge in risk aversion, as the USD/KRW exchange rate spiked to 1,448.50, its weakest level since 2023, reflecting capital outflows and a flight to safe-haven assets. Meanwhile, global crude oil prices rose 4.7% on the day, with CL=F futures reaching $89.30 per barrel, signaling market fears over potential disruptions to energy flows in East Asia. Export-oriented manufacturers, including semiconductors and automotive firms, bore the brunt of the selloff. The technology sector’s weighted index dropped 7.9%, while the broader industrial materials component fell 8.6%. Analysts pointed to heightened uncertainty following a series of military drills near the Korean Peninsula and new restrictions on cross-border data flows, which have raised concerns about long-term economic stability. The downturn has triggered ripple effects across regional markets, with Japan’s Nikkei 225 and Taiwan’s TAIEX both down over 2.5% by midday. Financial institutions saw increased demand for hedging products, and short-term interbank rates in Seoul spiked by 120 basis points, indicating tightening liquidity conditions.