South Korean stock markets plummeted Friday after international crude oil prices climbed above $100 per barrel [1].

The sharp decline highlights the vulnerability of the South Korean economy to energy price shocks, as the nation relies heavily on imported fuel for its industrial sector.

The KOSPI index fell 5.7% to 6,691 points [1], erasing gains made just one day prior and dropping back toward the 6,000-point level. Similarly, the KOSDAQ fell 5.3% to 748 points [1]. The volatility was severe enough to trigger a side-car sell program during the trading session [1].

Foreign and institutional investors drove the sell-off, offloading more than 5.7 trillion won in assets [1]. Major technology pillars were hit particularly hard, with shares of Samsung Electronics and SK Hynix both dropping about 8% [1].

Analysts attribute the market panic to the prolonged crisis in the Middle East, which has pushed energy costs to critical levels. This trend has led to a series of market disruptions; side-car activations have occurred for 10 days, excluding weekends and Constitution Day [1].

"Our stock market plummeted today as international oil prices soared above $100 per barrel due to the prolonged Middle East crisis," an anchor for YTN News said [1].

Reporter Ryu Hwan-hong said the KOSPI closed at 6,691, a 5.7% decrease, while the KOSDAQ finished the day down 5.3% at 748 [1].

KOSPI fell 5.7% to 6,691 points

The simultaneous crash of the KOSPI and KOSDAQ reflects a broader contagion of risk from geopolitical instability in the Middle East to East Asian equity markets. Because South Korea is a manufacturing hub with minimal domestic oil reserves, the $100 per barrel threshold acts as a psychological and economic trigger for institutional investors to hedge against inflation and rising production costs.