The Strait of Hormuz, the world’s most critical energy shipping lane through which approximately 20% of global oil and LNG flows, has effectively entered a state of blockade following the U.S.-Israeli military strikes against Iran in February 2026, sending shockwaves throughout the global economy.
What Is the Strait of Hormuz?
The Strait of Hormuz is a narrow waterway bordered by Iran to the north and Oman and the UAE (United Arab Emirates) to the south. It is approximately 50 km wide at its entrance and narrows to just 33 km at its most constricted point. The strait serves as the only maritime passage connecting the Persian Gulf to the Arabian Sea. According to estimates from the U.S. Energy Information Administration (EIA), roughly 20 million barrels of crude oil and petroleum products passed through the strait daily as of 2025, representing approximately $600 billion in annual energy trade. The exports of all major Gulf oil producers, including Saudi Arabia, Iraq, Kuwait, Qatar, and the UAE, transit this chokepoint. Around 20% of global LNG also passes through the Strait of Hormuz, most of it originating from Qatar. Approximately one-third of global fertilizer trade flows through the strait as well, making it an indispensable corridor for imported food, pharmaceuticals, and technology equipment heading into the Middle East.
Impact of the Iran War
On February 28, 2026, the United States and Israel launched a joint military operation against Iran, prompting Iran’s Islamic Revolutionary Guard Corps (IRGC) to move toward a blockade of the strait. International oil prices surged 43% in March alone, surpassing $103 per barrel, while the IRGC warned that prices could reach $200 per barrel. Brent crude spiked as high as $101 before pulling back slightly whenever U.S. officials made optimistic statements about a ceasefire, reflecting extreme market volatility. The International Energy Agency (IEA) estimated that the conflict would reduce global crude oil supply by approximately 8 million barrels per day in March alone, calling it the largest energy supply shock in history. Threats from Iranian drones, missiles, and fast-attack boats caused daily vessel traffic through the strait to fall by roughly 95%, with only about 100 ships transiting between March 1 and 20. The U.S. has continued military operations to reopen the strait, including airstrikes on Iranian anti-ship cruise missile bases, and has presented Iran with a 15-point list of demands, including the reopening of the Strait of Hormuz as a precondition for a ceasefire.
Impact on the Global Economy
The blockade of the Strait of Hormuz is delivering a complex, multidimensional shock to global supply chains, inflation, and economic growth, well beyond a simple oil price disruption. Energy analysts warn that if the blockade persists beyond 30 days, international oil prices could surge to $120-$150 per barrel, and a prolonged closure could push prices above $200. Chatham House projected that if the conflict continues for several months, oil prices could climb to $130 per barrel, the Eurozone economy could contract in the second quarter, and stagnation could persist through the second half of the year. Allianz Global Investors analyzed that for every 5-10% rise in oil prices, headline inflation in the U.S. and Europe immediately increases by 0.1-0.3 percentage points. Asian markets are particularly vulnerable: as of 2024, approximately 84% of crude oil and condensate shipped through the strait was destined for Asia, with LNG accounting for over 80%. Major Asian energy importers, including China, India, Japan, and South Korea, are simultaneously facing eroding manufacturing profit margins and weakened consumer purchasing power due to soaring energy import costs. According to current assessments of global economic resilience, if the blockade lasts more than one month, the probability of a global recession exceeds 75% and world GDP could contract by 1.5-3%. Several African nations have announced electricity consumption restrictions, and Slovenia became the first EU member state to implement fuel rationing, underscoring how broadly the crisis has spread.
Impact on Global Stock Markets
The blockade of the Strait of Hormuz delivered an immediate shock to major financial markets worldwide. When the blockade materialized in early March 2026, South Korea’s KOSPI index plunged 7.2% in a single day, as global financial markets were severely rattled. On Wall Street, three weeks of conflict wiped out all the annual gains accumulated in early 2026, with all three major indices recording steep declines. Energy-related stocks surged while airline, shipping, and manufacturing stocks suffered heavy losses. Market reactions, however, swung dramatically depending on the news flow. When reports emerged of discussions on resuming transit through the strait, the KOSPI staged a sharp single-day rebound of 2.74%, recovering to 5,377 points. A JPMorgan economist described the combination of job losses and the economic double-hit from soaring oil prices as “very ominous.” Financial market analysts warn that this supply shock may function as the strongest downward market pressure since the 1970s oil shocks, potentially entrenching a high-inflation environment through 2027.
Impact on Exchange Rates
The blockade has had a direct and immediate impact on the Korean won-to-U.S. dollar exchange rate. Once the blockade became a reality, the KRW/USD rate surged to levels threatening the 1,500 won threshold, driven by geopolitical risk and soaring energy prices weakening the Korean won. Conversely, when news broke that Iran and Oman were in discussions over resuming transit through the strait, the KRW/USD rate dropped sharply by 14.5 won in a single day, closing at 1,505.2 won. Historical data suggests that for every 10% rise in oil prices, the U.S. Dollar Index typically gains 0.5-1%. This oil-to-dollar feedback mechanism delivers a double blow to emerging markets: energy import costs rise directly in line with oil prices, while a stronger dollar simultaneously increases the burden of repaying dollar-denominated external debt. If the conflict drags on, U.S. inflation could be pushed above 5%, potentially forcing the Federal Reserve to resume rate hikes rather than cutting rates, which would further intensify dollar strength and emerging market currency weakness. Northeast Asian LNG prices surged by nearly 40% in a single day immediately following the blockade.
Impact on South Korea
South Korea is widely regarded as one of the most vulnerable economies in the world to the Strait of Hormuz crisis. As of 2024, South Korea’s energy import dependency stands at 94%, with 70% of its crude oil imports and more than 20% of its LNG imports transiting the Strait of Hormuz. According to the Korea International Trade Association, diverting around the strait would increase shipping costs by up to 50-80% and extend transit times by up to five days, making even alternative routes a significant burden. In past episodes of regional tension, insurance premiums in the area have been known to spike by as much as sevenfold. Disruption to fertilizer supply chains has also raised fears of a raw material shock comparable to the 2021 urea supply crisis. The government stated it has secured more than 200 days of supply by combining approximately 100 million barrels (roughly 117 days’ worth) of strategic petroleum reserves with private inventories, and the Ministry of Economy and Finance is preparing a 100 trillion won market stabilization program. Capital Group economist Jared Franz warned that if oil reaches $120 per barrel, U.S. GDP growth could be cut by 1.5 percentage points to below 1%, and for Asian energy importers like South Korea, the greatest threat is stagflation, a simultaneous combination of economic recession and rising prices.
Impact on Personal Finance and Investment in South Korea
The blockade of the Strait of Hormuz is having a complex impact on individual investors and household asset management in South Korea. Soaring energy prices are driving up consumer prices and the exchange rate, eroding real purchasing power and significantly increasing household spending on energy and food. In the equity market, volatility in the KOSPI index has become extreme. A pattern has emerged in which bad geopolitical news triggers sharp selloffs while news of potential strait normalization drives sharp rallies, leading financial advisors to recommend diversified portfolios and maintaining higher cash positions over short-term trading strategies. Gold has attracted renewed interest as a traditional safe-haven asset during geopolitical crises, with demand rising accordingly. A clear bifurcation has emerged in the stock market: energy-related stocks (refineries, chemicals, and shipping) are outperforming in the short term, while manufacturing stocks dependent on raw materials are underperforming due to cost pressures. Those with lower incomes, higher energy cost ratios in household spending, and less access to alternative infrastructure are bearing the greatest burden from this crisis. Experts recommend making investment decisions based on structural shifts rather than short-term news cycles, and favor diversified portfolios oriented toward energy and export sectors while maintaining adequate cash reserves.
Impact on South Korea’s Housing Market
The Iran war triggered by the Strait of Hormuz blockade is also exerting a cooling effect on South Korea’s real estate market. The most direct transmission channel is the interest rate channel. As surging oil prices deepen inflation, the Bank of Korea is increasingly likely to slow or pause its rate-cutting cycle, which in turn raises household debt burdens and dampens homebuying sentiment. A rising exchange rate also pushes up the cost of imported construction materials and raw materials, driving up overall construction costs. According to a report by Hana Securities, the construction sector’s return underperformed the KOSPI by 3.8% during a prolonged Hormuz blockade, and construction-related stocks took a significant hit. Analysts note that psychological caution, rising acquisition costs, and an increase in listings from multi-property owners are combining to create an environment in which home prices are unlikely to rise in the near term. However, if the conflict concludes quickly, the impact is expected to be limited. With Seoul apartment official assessed values already up 18.67%, owner-occupiers face compounding burdens as rising property tax obligations coincide with higher energy costs.
Impact on Samsung Electronics: Stock Price and Business Operations
The Strait of Hormuz blockade and the Iran war are creating a complex situation for Samsung Electronics, with negative and positive factors coexisting simultaneously. On the negative side, the most prominent concern is the contraction of the Middle East market. The Middle East is a key market where Samsung Electronics holds the top smartphone market share at 36%, and the company had been enjoying strong premium sales, with Galaxy S25 Ultra sales in the region growing 7% year-over-year. However, consumer sentiment may weaken significantly due to the war. The Middle East is also a core market for premium TVs and home appliances, where Samsung and LG Electronics hold the first and second positions respectively, meaning prolonged conflict would inevitably hurt demand. In the semiconductor segment, attention is focused on the risk that major data center projects being pursued by the UAE, Saudi Arabia, and other Gulf states could be delayed. If that occurs, demand for AI chips, HBM, DRAM, and NAND flash could face cascading negative effects. On the positive side, there is a currency benefit. With the KRW/USD exchange rate breaking through 1,500 won, Samsung Electronics, which receives export revenues in U.S. dollars, is seeing an increase in won-denominated export profits. Some analysts in the investment community have noted that Samsung’s estimated 2026 operating profit could receive a meaningful boost from the favorable exchange rate effect. When news of potential reopening of the Strait of Hormuz emerged, Samsung Electronics’ share price recovered to the 200,000 won level and SK Hynix reclaimed the 1,000,000 won mark, demonstrating how sensitively these stocks respond to improving market conditions. Overall, Samsung Electronics is navigating a phase in which the threat factors of global demand uncertainty and supply chain risk coexist with the opportunity factor of currency-driven profit gains, making the duration of the conflict the pivotal variable for the stock’s future direction.
Outlook and Key Takeaways
The Strait of Hormuz crisis has once again laid bare South Korea’s structural vulnerability: its heavy dependence on energy imports. Whether the conflict ends early is the key variable for international oil prices and the global economy, and in the worst-case scenario, a global recession cannot be ruled out. Europe has already demonstrated that structural change is possible, reducing its dependence on Russian gas from 45% of total EU imports in 2022 to just 13% in 2025 through its REPowerEU initiative, while dramatically expanding its share of renewable energy. There is a growing chorus of voices calling on South Korea to similarly reduce its structural vulnerability to geopolitical risk over the long term, through a transition to renewable energy and diversification of its energy supply. In the near term, the government’s release of strategic petroleum reserves, market stabilization programs, and energy conservation policies will serve as the primary tools for absorbing the shock.