What Happened On May 18, 2026, geopolitical tensions in the Middle East have reached their peak, causing severe instability in the global energy market. Specifically, news of a drone attack on a nuclear power facility in the United Arab Emirates (UAE) has emerged, and as the conflict between Iran and Western powers over passage through the Strait of Hormuz escalates, international oil prices have surged. With the war with Iran in a stalemate, the deepening instability in the Strait of Hormuz, a critical artery of the energy supply chain, has led to weakness in Asian foreign exchange markets and a decline in U.S. stock futures, fueling overall risk-off sentiment in financial markets.

Why It Matters The escalation of the Middle East crisis is a critical issue that could shake the foundations of the global economy, extending beyond a mere regional conflict. The Strait of Hormuz is a strategic chokepoint accounting for approximately 20% of the world's seaborne oil shipments, and its instability directly translates into rising international oil prices. A series of events, including the Trump administration's hawkish Iran policy, Iran's announcement of a toll for passage through the Strait of Hormuz, and the escalation of U.S.-Iran military clashes, have already continuously pushed up oil prices since early May 2026. The addition of a new variable, the UAE nuclear power plant attack, has further exacerbated the severity of the situation. Prolonged high oil prices will intensify global inflationary pressures, make it more challenging for central banks worldwide to normalize monetary policy, and ultimately increase the likelihood of a global economic recession. For countries like South Korea, which are highly dependent on energy imports, this will inevitably result in immense economic burdens.

Impact on the Korean Market The amplification of Middle East geopolitical risks is expected to have multifaceted negative impacts on the South Korean market. First, the surge in international oil prices will exacerbate domestic inflationary pressures, burdening the Bank of Korea's monetary policy operations. While a rate hike is challenging given the already high level of household debt, oil-driven inflation could increase pressure for a benchmark interest rate increase. Second, rising raw material prices could lead to increased production costs for domestic companies, resulting in deteriorating profitability. Refining and petrochemical companies, which use crude oil as their primary raw material, may enjoy short-term inventory valuation gains, but could face demand contraction and margin pressure in the long run. Third, the spread of global risk-off sentiment could accelerate foreign capital outflow and fuel an increase in the KRW/USD exchange rate. This will expand volatility in the domestic stock market and act as a factor dampening investor sentiment. Finally, as safe-haven sentiment strengthens, selling pressure could be exerted on the domestic bond market, likely leading to a rise in government bond yields.

Key Stock Analysis * WTI Crude Oil (WTI), Brent Crude Oil (BRENT): Deepening Middle East geopolitical risks directly lead to instability in the global crude oil supply chain, causing a surge in WTI and Brent crude oil prices. As long as concerns about supply disruptions persist, oil prices are likely to remain high, positively impacting related derivatives and energy investment products. (sentiment: positive)

• Gold (GOLD): As geopolitical uncertainty grows, gold's appeal as a safe-haven asset becomes more pronounced. With increased global stock market volatility and demand for inflation hedging, gold prices are expected to gain further upward momentum. (sentiment: positive)
• S-Oil (010950), SK Innovation (096770): In the short term, surging oil prices can increase inventory valuation gains for refiners, having a positive impact. However, if high oil prices persist in the long term, refining margins could shrink, and cost burdens in the petrochemical sector could intensify, negatively affecting profitability. Currently, expectations for short-term inventory effects are higher. (sentiment: positive)
• Bitcoin (BTC): Cryptocurrencies like Bitcoin tend to be classified as risk assets. If global risk-off sentiment strengthens due to Middle East risks, investors will favor safe-haven assets, which could exert selling pressure on the cryptocurrency market, including Bitcoin. (sentiment: negative)
• Korea 10-Year Treasury Bond (KR10Y): Increased oil-driven inflationary pressure raises the likelihood of a Bank of Korea rate hike, which could lead to a rise in government bond yields (a decline in bond prices). Furthermore, the possibility of it aligning with a sell-off in the global bond market cannot be ruled out. (sentiment: negative)

Future Scenarios Middle East geopolitical risks are unlikely to be resolved in the short term. With the confrontation with Iran in a stalemate, instability in the energy supply chain is likely to be prolonged. * Optimistic Scenario: If active mediation efforts by the international community ease tensions between Iran and Western powers, and safe passage through the Strait of Hormuz is ensured, oil prices could stabilize. In this case, global inflationary pressures would somewhat ease, and central banks worldwide would gain more flexibility in their monetary policy operations. The South Korean economy could shed the burden of high oil prices and regain its recovery momentum.

• Pessimistic Scenario: If additional provocations, such as the UAE nuclear power plant attack, occur and military clashes between Iran and Western powers escalate, oil prices could surge to uncontrollable levels. This could plunge the global economy into stagflation (inflation amidst economic recession), and the South Korean economy would face the dual challenge of severe recession and soaring inflation. Investors should closely monitor military developments in the Middle East, changes in production volumes of major oil-producing countries, and trends in international oil prices. Especially during periods of high oil price volatility, interest in safe-haven assets like gold, as an inflation hedge, is expected to increase, alongside the earnings outlook for energy-related companies.