Middle East Tensions: The Triple Threat to Korea's Market

On July 24, 2026, escalating tensions between the US and Iran led to a sharp rise in international oil prices and US Treasury yields, causing Korea's KOSPI index to plunge nearly 5.7% in a single day, dubbed 'Black Friday.' This shocking event raises the question of whether such external shocks will merely result in short-term risk aversion or trigger structural changes in Korea's financial markets and real economy. This question is crucial for assessing future policy responses, investor sentiment, and the adaptability of industrial structures.

On July 24, Korea's stock market was hit hard as US-Iran tensions intensified, pushing international oil prices above $100 per barrel and US 10-year Treasury yields past 4.7%. The KOSPI index fell by 406 points, or about 5.7%, from the previous day. While foreign and institutional investors engaged in massive sell-offs, individual investors stepped in to buy, triggering the 'sell sidecar' mechanism multiple times. Samsung Electronics and SK Hynix saw declines of 7-8%, whereas Samsung Biologics and defense stocks surged.S1

The shock extended beyond a single day's drop. The blockade of the Strait of Hormuz threatened 70% of Korea's oil imports, with strategic reserves covering only 26 days. The Korean won hit a 17-year low, and the OECD revised Korea's growth forecast down by 0.4 percentage points while raising inflation expectations. In response, the government implemented emergency measures, including an oil price cap, releasing IEA reserves, securing oil from the UAE, and early reactivation of nuclear power plants.S2

In August, IBK Securities warned that if the Iran crisis prolonged, rising oil prices could fuel inflation and interest rate hikes, burdening Korea's stock market until 2027. They particularly noted that if US interest rates rose without logical reasons, a 'rate tantrum' and panic selling could occur.S3

Interestingly, the rise in oil prices presented opportunities for refinery and energy-related stocks. In mid-July, as fears of a Hormuz blockade grew and oil prices surged, Heung-gu Oil jumped nearly 17% in a day, and S-Oil rose over 5%. This indicates that not all sectors are negatively affected by rising oil prices.S4

The Korean economy faces simultaneous exposure to vulnerabilities in energy supply chains and financial market shocks. However, CSIS suggested that if the shock remains localized, Korea's economy might only experience a short-term slowdown, with recovery possible through strong AI-driven exports and policy responses.S2

KEIA also viewed the impact of the Middle East conflict on Korea's economy as potentially limited. If the conflict remains localized, the shock might not extend beyond the short term, and a rebound in the stock market could occur by year-end if AI export growth and energy supply stabilization align.S5

It is clear that Korea's semiconductor-focused stock market is vulnerable to external shocks. The sharp declines in Samsung Electronics and SK Hynix on July 24 highlighted structural risks in Korea's market, compounded by a global tech stock downturn.S1

Despite swift and multi-layered government responses, the limitations of strategic oil reserves and export-dependent structures remain structural weaknesses in Korea's economy. The global sensitivity of the semiconductor industry further weakens its defense against external shocks.S2

As IBK Securities analyzed, if the Iran crisis prolongs and US interest rates continue to rise, Korea's stock market may face not just short-term shocks but also medium- to long-term structural changes. This could affect investor sentiment, corporate earnings forecasts, and industrial structure transitions.S3

Nevertheless, if AI exports, technological competitiveness, and policy response capabilities combine, Korea's stock market could find opportunities for a rebound. However, this depends on the easing of external risks and stabilization of energy supply chains.S5

The remaining question is whether Korea's stock market will end these external shocks as mere short-term 'fear aversion' or establish a new stability structure through responses and transitions in energy, finance, and industrial structures. This question goes beyond mere market rebound, serving as a measure of Korea's economic resilience and future competitiveness.S1