Hormuz is Closed: How the Energy War is Reshaping the Global Economy [EN]

"This is not merely a regional crisis. It is a structural shock inflicted on the global economy at a geoeconomically vulnerable time."

— World Economic Forum (WEF), The Global Price Tag of War in the Middle East (March 2026) 

[Prologue: The Market Observer's Perspective]

At dawn on February 28, 2026, the US and Israel launched a surprise airstrike on Iran under the name 'Operation Epic Fury.' In the first 12 hours, over 900 strikes battered military and leadership facilities across Iran, resulting in the death of Supreme Leader Ali Khamenei. Iran immediately retaliated by blockading the Strait of Hormuz. In that instant, a narrow 100-mile waterway through which 20% of the world's oil supply moved was effectively closed.

What this observer focuses on is not the military progression of the war itself, but the change in the economic structure created by the blockade. A month into the war, Brent crude surged 36%, from $71 to a peak of $113. Dubai spot crude skyrocketed 76%, surpassing $126. South Korea's KOSPI wiped out 817 trillion won in market capitalization in just two days. The Bangkok government declared a four-day workweek, and Germany's BASF raised supply prices by 30%. These numbers point to a single question: Is the Hormuz blockade a short-term shock, or a structural inflection point reshaping the global energy order?

EXECUTIVE SUMMARY

After the US and Israel launched full-scale military operations against Iran on February 28, 2026, the Strait of Hormuz was effectively blockaded, inflicting an unprecedented shock on the global energy market. According to the EIA, Brent crude surged from $71 on the eve of the war to $94 on March 9, and later breached $100, trading above $113 as of March 27.^¹ The head of the IEA defined the situation as "the most severe global energy security crisis in history."^² The asymmetry of the shock is key. While Western economies can partially buffer the impact with inventory and Strategic Petroleum Reserves, countries like Japan and South Korea—with over 90% dependence on Hormuz—and developing nations without reserve capacity are directly exposed to structural vulnerabilities. South Korea faced a triple shock: the largest KOSPI drop in history (-12%), the won hitting a 17-year low, and the introduction of a fuel price cap for the first time in 30 years, leading the OECD to downgrade South Korea's 2026 growth forecast from 2% to 1.7%.^³

01. Anatomy of the War: The Structure of Operation Epic Fury

The Background of the Outbreak: Why February 28, 2026?

The 2026 Iran war did not happen overnight. In June 2025, the US and Israel struck Iran's nuclear and missile infrastructure during the '12-Day War.' However, Iran partially restored its forces within months, and the Iranian government's violent suppression of large-scale domestic protests in January 2026 added political justification for the Trump administration's military option against Iran. When indirect nuclear negotiations definitively broke down in mid-February, the US executed its largest regional military buildup before launching the largest strike since the 2003 invasion of Iraq.^⁴

At the outbreak of the war on February 28, the US deployed B-2 stealth bombers, B-1s, B-52s, Tomahawk cruise missiles, and HIMARS, while the Israeli Air Force struck the Iranian leadership, including Khamenei, in an unprecedented 'decapitation strike.' Over 900 airstrikes hit across Iran in the first 12 hours.^⁴ Iran immediately counterattacked with over 500 ballistic missiles and 2,000 drones targeting Israel, US military bases, and Gulf state energy facilities.^⁵

The Hormuz Blockade: The Scale of the Disruption in Numbers

Iran's core strategic card was not military counterattacks, but the blockade of Hormuz. Transit through the strait was effectively cut off after March 4, and daily ship passages converged to near zero from over 120 at the start of the year.^⁶ When this single narrow waterway was blocked, roughly 20% of global oil supply and 20% of global LNG trade volume were simultaneously cut off.^⁷ Oil production in Kuwait, Iraq, Saudi Arabia, and the UAE fell by 6.7 million barrels per day by March 10, and by at least 10 million barrels by March 12. As storage space saturated, Middle Eastern producers were forced to halt production entirely.^²

02. Shockwaves in the Energy Market: The Chain Reaction of Oil, LNG, and Shipping

The Dual Divergence of Oil Price Structures: Futures vs. Spot Prices

The most anomalous phenomenon created by this war is the extreme divergence between international futures prices and regional spot prices. As of March 27, Brent futures had risen 36% since the war's onset, topping $113, but Dubai crude, the Middle East spot benchmark, skyrocketed 76% over the same period to surpass $126. On March 19, Dubai crude even breached $166, setting an all-time record.^⁸

There are two reasons futures prices are lower than spot prices. First, a 'jawboning' effect occurred as President Trump's repeated remarks hinting at the conclusion of negotiations acted as downward pressure on the futures market. Second, major countries including the US released a record 400 million barrels of Strategic Petroleum Reserves (SPR), providing a short-term buffer. However, BCA Research's Marko Papic warned that by mid-April, when these SPRs and the exemption volumes for Russian and Iranian sanctions are fully exhausted, the world will face an 'oil price cliff.'^⁶

LNG and Food: The Complex Transmission of Energy Shocks

Hormuz is not just an oil issue. As of 2025, roughly one-fifth of global LNG trade passed through this strait, and Qatar is the world's largest LNG exporter. In early March, QatarEnergy declared Force Majeure on all export contracts, effectively notifying a halt in supply.^² The structure where Singapore relied on Qatari LNG for 42.5% of its supply, and Thailand for 42.69%, collapsed instantly.^⁹ IMF Managing Director Kristalina Georgieva warned that for every 10% increase in energy prices, global inflation would rise by an additional 0.5 percentage points.^¹⁰ Energy prices transmit into food prices via logistics, chemical, and fertilizer costs, and for countries relying on imports for over 80% of their food, such as the Gulf region, a 'food supply state of emergency' is already a reality.

03. The Asymmetry of the Shock: The Structure of Winners and Losers

Asia's Energy Triage: South Korea, Japan, India, and China

According to WEF analysis, four countries—China, India, Japan, and South Korea—import about 69% of the crude oil and condensate flowing through Hormuz.^⁷ However, their shock absorption capacities differ starkly. China can buffer the short-term shock with massive strategic and commercial reserves and can quickly leverage Russian crude as an alternative source. India is vulnerable due to thin reserve capacity and high dependence on Middle Eastern crude. Japan holds 254 days' worth of strategic reserves as of February, but 90% of its imports come from the Middle East, mostly transiting through Hormuz.^⁹

South Korea: Anatomy of a Triple Shock

South Korea emerged as the clearest casualty of this crisis. South Korea imports about 70% of its crude and 20% of its LNG from the Middle East, with over 95% of it passing through Hormuz.^¹¹ The KOSPI plunged 12% in a single session on March 4, recording its largest drop in history, and wiped out 817 trillion won in market cap over the next two days. Sidecars were triggered 10 times and circuit breakers twice during the month.^³ The won exchange rate plummeted to 1,518.4 won per dollar on March 23, its lowest since March 2009, and the weekly average of 1,503.4 won exceeded 1,500 won for the first time in 17 years.^³

President Lee Jae-myung introduced a fuel price cap for the first time in 30 years and mobilized a 100 trillion won (approx. $66.5 billion) market stabilization program. An additional 25 trillion won supplementary budget is under cabinet review, and emergency bond purchases of 5 trillion won have been executed.^¹² Furthermore, considering naphtha as a core material for semiconductor production, the South Korean government designated it an 'economic security item' and implemented temporary export restrictions.^¹³ The OECD downgraded South Korea's 2026 growth forecast from 2% to 1.7%.^³

The Unintended Beneficiary: Russia and Alternative Energy Routes

The most paradoxical structural effect of this war is the reflexive benefit to Russia. Russian crude does not pass through Hormuz. When Gulf crude was blocked, India and China drastically expanded their Russian imports, causing Russia's crude export prices to far exceed Moscow's 2026 budget benchmark of $59 per barrel.^⁹ This had the effect of giving Russia breathing room to secure funding for the war in Ukraine. The Foreign Policy Research Institute (FPRI) pointed out that this war directly weakens economic pressure on Russia. A structural contradiction arose where US military action against Iran unintentionally strengthened Russia's war-sustainability capabilities.^⁹

04. Macroeconomic Ripple Effects: Inflation, Central Banks, and Global Growth

Reignited Inflation and the Central Bank Dilemma

Nomura's economist team analyzed from the war's onset that "the continuation of the Iran conflict strengthens the argument for many central banks to hold rates."^¹⁴ Former US Treasury Secretary Janet Yellen warned that the war would hit US economic growth and exacerbate inflationary pressure, making it even harder for the Fed to cut rates.^¹⁴ Allianz Research analyzed that if the Hormuz blockade lasts beyond six weeks, Brent crude will surpass $130, and inflation in both the US and Europe will rise by an additional 0.3-0.5 percentage points.^¹⁵

The ECB and the Fed have different response logics. In the eurozone, where inflation had already converged near the target, the ECB is likely to view this as a negative supply shock and choose to hold rates at 2%. Conversely, because US inflation has consistently exceeded the target since 2021, the structure forces the Fed to further delay rate cuts. The WTO estimated that if energy and gas prices remain high on an annual basis, global GDP growth in 2026 would decrease by an additional 0.3 percentage points, and Europe, highly dependent on energy imports, could see its growth rate drop by over 1 percentage point compared to prior forecasts.^¹⁰

Collapse of Traditional Safe-Haven Correlations

Allianz Research highlighted the collapse of the traditional inverse correlation between bonds and equities as the most notable market phenomenon in this war. On the day of the outbreak, US Treasury yields rose instead of falling. In a supply-driven inflation structure, bonds fail to properly perform their portfolio hedge role of offsetting equity shocks. This is a pattern similar to the post-COVID reflation phase, suggesting the need to shift duration exposure to inflation-linked bonds (TIPS).^¹⁵

05. Historical Analogies: Comparisons with 1973 and 1979

Structural Similarities and Differences

The 1973 Arab oil embargo brought stagflation to the Western world, and the 1979 Iranian Revolution more than doubled oil prices. According to Wikipedia's economic impact entry, the direct shock to advanced Western nations this time has been mitigated compared to the 1970s through improved energy efficiency, alternative energy development, and Strategic Petroleum Reserve systems. However, the shock to developing Asian economies exceeds that of the 1970s in some respects. At that time, Asia was not the center of global manufacturing.^²

J.P. Morgan projected the 2026 annual average for Brent crude at $60 per barrel, but this was under the assumption that a Hormuz blockade would not be prolonged. They stated, "Unless military action directly targets Iran's oil production and export infrastructure, the probability of a prolonged supply disruption is low," but current reality has already bypassed this assumption.^¹⁶

Crisis of the GCC Economic Model: The Gulf States' Dilemma

Iran's retaliation strategy lay in the internationalization of costs rather than a head-on military confrontation. By attacking the energy infrastructure and ports of Saudi Arabia, Kuwait, the UAE, and Iraq, it intentionally designed a structure that forced third countries besides the US and Israel to bear the costs of the war. The World Economic Forum described this as "the shock of the battlefield solidifying into a geoeconomic shock."^⁷ GCC nations were placed under the dual pressure of declining export revenues while having to halt production entirely due to a lack of storage space.

06. Variables and Limitations: The Terrain of Uncertainty

The Mid-April Tipping Point: What Comes After the Reserves Are Exhausted?

BCA Research identified mid-April, when SPR releases and Russian/Iranian crude exemption volumes simultaneously dry up, as a 'global oil price cliff.' Based on this timeline, the daily supply deficit is estimated to more than double from the current 4.5–5 million barrels to up to 10 million barrels.^⁶ As of March 29, President Trump has extended the pause on energy facility attacks against Iran to April 6, and his remarks that "very good, productive talks" are underway between the US and Iran are putting downward pressure on the market.^¹⁷ However, even if negotiations succeed, reopening the strait and normalizing production will take weeks to months.

The Iranian Leadership Vacuum and Persistent War Risks

Following Khamenei's death, the Iranian Assembly of Experts named his son Mojtaba Khamenei as successor. However, the period of instability until the new leadership's decision-making capacity and legitimacy are established harbors the risk of unpredictable escalation. Iran sharply reduced its missile launch volume over the 29 days following the outbreak, interpreted as a result of either ammunition depletion or a conservation strategy.^⁵ Yemen's Houthi forces are warning of intervention if attacks on Iran continue, leaving a double blockade scenario—where the Red Sea route is also cut off—as a latent risk.^¹⁸

Macro Scenario: Probabilistic Future Trajectories

The scenarios below are constructed based on analyses by the EIA (Mar 10, 2026), Allianz Research (Mar 3, 2026), BCA Research (Mar 27, 2026), J.P. Morgan Global Research, and the WEF (Mar 2026). Quantitative probabilities are omitted due to the rapidly changing war situation.

Scenario A (Base Case): Negotiations Conclude Within 4-6 Weeks, Brent Converges to $70 by Year-End

The EIA's baseline scenario assumes the war is resolved relatively short-term. Depending on negotiation progress, Brent crude gradually falls to average $70 in Q4 2026, stabilizing around $64 in 2027.^¹ Allianz Research's base scenario also assumes a US-Iran deal within 4 weeks accompanied by a power transition in Iran; in this case, Brent peaks at $85 and comes down to $70 by year-end. The inflation impact is limited to 0.1-0.2 percentage points in both the US and Europe.^¹⁵ South Korea's KOSPI reacts sensitively to negotiation signals, entering a highly volatile sideways phase after a short-term rebound.

Scenario B (Structural Shift Case): Prolonged Hormuz Blockade, Brent Fixes Above $100

Allianz Research's middle scenario suggests a path where, if the Hormuz blockade is meaningfully prolonged, Brent crude breaches $100, and as the market gradually adapts, converges to $70 by year-end. In this case, Asian central banks further delay rate cuts, and South Korea and Japan fundamentally reshape their energy procurement structures by expanding long-term contracts for US LNG and crude. For South Korea, as analyzed by KEI, the naphtha supply-demand crisis triggers an industrial chain effect leading to semiconductor and automotive production disruptions.^¹³

Scenario C (Tail Risk Case): Direct Hits on Energy Infrastructure, Brent Breaches $130

Allianz Research's extreme scenario involves Iran directly striking Gulf states' energy infrastructure on a massive scale and a prolonged strait blockade. Brent crude breaches $130, adding over 0.5 percentage points to global inflation.^¹⁵ In a scenario where Houthi forces enter the war and the Red Sea is also subject to a dual blockade, the world faces the largest crude supply disruption from a single event in history. This is the path where the "most severe energy security crisis in history" cited by the IEA head fully materializes. In this case, the South Korean won breaches 1,600 won per dollar, and KOSPI recovery is delayed for months following further plunges.

Conclusion

The Strait of Hormuz is merely a 100-mile waterway. However, the scale of the shock that occurs to the global economy when this single channel is blocked reaffirms that it is not a simple geographic bottleneck, but the most vulnerable Single Point of Failure in the global energy supply chain. A world where the Brent futures market plunges 11% in a day on a single remark from Trump, and a single Iranian drone paralyzes UAE ports. The information environment of the energy market has become as strategic as military intelligence.

There are three structural implications observers must note. First, this crisis proved numerically that geographic concentration of energy procurement is an economic security risk. South Korea's 100 trillion won emergency response and naphtha export restrictions show that energy diversification is a matter of survival, not a strategic option. Second, traditional safe-haven correlations are nullified during supply shocks. In a phase where bonds and equities fall together, the portfolio role of inflation hedge assets needs to be reevaluated. Third, the fact that Russia is the most paradoxical beneficiary of this war reminds us once again that the secondary and tertiary ripple effects of geopolitical actions often exceed the designer's intentions. Energy remains the most powerful weapon of geopolitics. That weapon has been fired.

※ Disclaimer

This report does not recommend the purchase or sale of any specific assets, nor does it support or criticize any specific regime, government, or politician. It is an article of macroeconomic system analysis based on publicly disclosed data and historical indicators. It is impossible to predict all market variables, and the responsibility for all judgments and subsequent consequences rests entirely with the reader. While the author (Neutral Observer) makes every effort to ensure the reliability of the analysis, the flawless accuracy of the provided information is not guaranteed.

Sources and References

¹ EIA, Short-Term Energy Outlook — Global Oil Prices (2026.03.10) — https://www.eia.gov/outlooks/steo/report/global_oil.php

² Wikipedia, Economic impact of the 2026 Iran war (Updated March 2026) — https://en.wikipedia.org/wiki/Economic_impact_of_the_2026_Iran_war

³ Korea Herald, One month into US-Iran war, S. Korean economy reels (2026.03.28) — https://www.koreaherald.com/article/10704959

⁴ Britannica, 2026 Iran War (Updated March 29, 2026) — https://www.britannica.com/event/2026-Iran-War

⁵ Wikipedia, 2026 Israeli–United States strikes on Iran (Updated March 2026) — https://en.wikipedia.org/wiki/2026_Israeli%E2%80%93United_States_strikes_on_Iran

⁶ CNBC, Iran war-hit oil prices will soon rise if Hormuz stays shut (2026.03.28) — https://www.cnbc.com/2026/03/28/oil-gas-prices-iran-war-hormuz.html

⁷ World Economic Forum, The global price tag of war in the Middle East (March 2026) — https://www.weforum.org/stories/2026/03/the-global-price-tag-of-war-in-the-middle-east/

⁸ CNBC, $166 a barrel? Middle East oil gives clue to where prices could be headed (2026.03.19) — https://www.cnbc.com/2026/03/19/166-a-barrel-middle-east-oil-gives-clue-to-where-all-prices-could-be-headed-if-iran-war-drags-on.html

⁹ The Diplomat, Asia's Energy Triage Amid the Iran War (March 2026) — https://thediplomat.com/2026/03/asias-energy-triage-amid-the-iran-war/

¹⁰ CFR Global Conflict Tracker, Confrontation Between the United States and Iran (2026.03.27) — https://www.cfr.org/global-conflict-tracker/conflict/confrontation-between-united-states-and-iran

¹¹ CNBC, South Korea braces for 'worst-case scenarios' as Iran oil shock deepens (2026.03.25) — https://www.cnbc.com/2026/03/25/south-korea-iran-oil-shock-middle-east-conflict.html

¹² CNBC, Oil shock prompts South Korea to impose fuel price cap for first time in 30 years (2026.03.09) — https://www.cnbc.com/2026/03/09/south-korea-fuel-price-cap-oil-price-surging.html

¹³ Korea Economic Institute of America (KEI), The Iran War Is Stress-Testing South Korea's Energy Model (2026.03.25) — https://keia.org/the-peninsula/the-iran-war-is-stress-testing-south-koreas-energy-model/

¹⁴ CNBC, Middle East conflict poses fresh test to central banks as oil shock fuels inflation (2026.03.04) — https://www.cnbc.com/2026/03/04/iran-israel-us-war-middle-east-conflict-oil-gas-lng-surge-central-banks-inflation-risk.html

¹⁵ Allianz Research, Conflict in the Middle East: Implications for Markets (2026.03.03) — https://www.allianz.com/content/dam/onemarketing/azcom/Allianz_com/economic-research/publications/specials/en/2026/march/2026_03_03_IranScenarios.pdf

¹⁶ J.P. Morgan Global Research, Oil Price Forecast 2026 (March 2026) — https://www.jpmorgan.com/insights/global-research/commodities/oil-prices

¹⁷ CNBC, Oil markets: WTI, Brent, Middle East tensions keep markets on edge (2026.03.24) — https://www.cnbc.com/2026/03/24/oil-prices-today-wti-brent-middle-east-iran-war.html

¹⁸ Al Jazeera, US-Israel war on Iran: What's happening on day 29 (2026.03.28) — https://www.aljazeera.com/news/2026/3/28/iran-war-what-is-happening-on-day-29-of-us-israel-attacks