From 6000 Points to Two Circuit Breakers: A Missile Exposes South Korea's Stock Market Weakness
The South Korean Stock Exchange (KOSPI) experienced two consecutive trading halts (circuit breakers) on March 3 and 4, 2026, plunging nearly 13% from a recent high of 6,244 points. This sharp decline, triggered by escalating U.S.-Iran tensions and the closure of the Strait of Hormuz, exposed the extreme vulnerability of South Korea's stock market, which is heavily reliant on semiconductor stocks, particularly Samsung Electronics and SK Hynix.
These two companies, dominating the global HBM (high-bandwidth memory) market crucial for AI and GPUs, had driven KOSPI's 75.6% surge in 2025. However, the market's concentration on chip exports, which account for over a third of total exports, became its Achilles' heel. The closure of the Strait of Hormuz—a vital shipping route for liquefied natural gas (LNG), which fuels nearly a third of Korea's power generation—threatened energy supplies and semiconductor manufacturing costs.
While defense stocks surged on geopolitical tensions, foreign investors sold a record $8.5 billion in Korean shares over two days, highlighting the market's liquidity and its status as a prime target for rapid capital flight during global panic. Retail investors attempted to buy the dip, but were overwhelmed by the sell-off.
The crash underscored deeper structural risks beyond corporate governance reforms: South Korea's market is exceptionally exposed to a single industry dependent on imported energy and vulnerable to global shocks. The incident demonstrated that while fundamentals may drive long-term growth, sentiment and geopolitics can erase gains rapidly.
比推03/04 13:31
