20% of Global Oil Stopped: 5 Warnings the Prolonged Hormuz Blockade Poses for Korea's Economy and a Second Oil Shock
As the Iranian Revolutionary Guard Corps blockaded the Strait of Hormuz, international oil prices surged more than 10% in two days. With 20% of global maritime oil traffic passing through this chokepoint now blocked, emergency alarms are ringing for the Middle East supply chain that accounts for 70% of Korea's crude oil imports — warnings are emerging that the worst energy crisis since the 1973 oil shock could be coming.
Image not available: A 404 error occurred while attempting to access satellite/map images of the Strait of Hormuz via external URLs. It is recommended to manually verify and attach an image (e.g., Hormuz_NASA.jpg from Wikimedia Commons) to the Files property.🛢️ 20% of Global Oil Has Stopped
What happens to Korea's economy when the Strait of Hormuz closes? In early March 2026, immediately following U.S. and Israeli airstrikes on Iran, the Iranian Revolutionary Guard Corps (IRGC) declared a blockade of the strait, threatening to "set tankers on fire." International oil prices surged more than 10% in just two days, and gas stations across Seoul were jammed with drivers rushing to fill their tanks.
TL;DR
- Hormuz Blockade: IRGC officially declared closure of the strait on March 2 (local time), threatening to attack tankers
- Oil Price Surge: Brent crude up 10%+ in two days, hitting the $81/barrel range as of March 4
- Korea Impact: 70% of domestic crude oil imports come from the Middle East → direct supply disruption
- Government Response: President Lee Jae-myung issued an emergency order on March 5 capping gasoline prices
- Worst-Case Scenario: Prolonged blockade could trigger the worst oil shock since 1973
1. The Facts: What Happened
The United States and Israel struck Iran on February 28 (local time). Although numerous Iranian nuclear and military facilities were hit, the IRGC immediately launched a counter-offensive and officially declared the closure of the Strait of Hormuz.
Brigadier General Ebrahim Jabari, an aide to the IRGC commander, stated: "We will set fire to every tanker passing through this strait." The U.S. Navy is currently reviewing escort operations for tanker passage, and President Trump stated that "the U.S. Navy will directly escort tankers if necessary."
As of March 5 (local time), Iran has continued additional strikes against Israeli and U.S. military targets, with growing expectations that the war may not end quickly.
2. Escalation Mechanism: Why Did Oil Prices Rise So Fast?
The Strait of Hormuz is a strategic chokepoint through which approximately 20% of global seaborne oil passes. The vast majority of crude oil from Gulf producers — Saudi Arabia, Iraq, the UAE, Kuwait, and Qatar — flows through this strait to Asia and Europe.
Once the blockade became real, futures markets reacted immediately:
- Brent Crude: Up 10%+ in two days, breaking $81/barrel
- WTI: Surging to the mid-$74/barrel range
- Insurance Premiums: War risk premiums on tankers expected to rise tens of times over
- Logistics Costs: Rerouting via the Cape of Good Hope means 3–4x the cost and 2–3 extra weeks in transit
Domestically, psychological pre-pricing also kicked in. As of March 5, the Korea National Oil Corporation reported a national average gasoline price of ₩1,822/liter (+₩45 from the previous day), and diesel at ₩1,811/liter.
3. Korea's Economy: Why Is It Especially Vulnerable?
(Context table — refer to the Korean source page for the full data table)
In particular, the KRW/USD rate breaching ₩1,500 and surging oil prices are simultaneously driving up import costs from two directions. Logistics costs for Korea's flagship export industries — semiconductors and automobiles — are also set to rise unavoidably.
4. Stakeholders: Who Is Moving and How?
Government: President Lee Jae-myung ordered the implementation of a maximum gasoline price cap at an emergency cabinet meeting on March 5. The government also announced plans to activate a ₩100 trillion market stabilization fund, and called for diversification of crude oil and LNG import sources.
Consumers: Cars are lining up at Seoul gas stations, and some have already crossed ₩2,000/liter. The psychology of "fill up before it gets worse" is spreading rapidly.
Businesses: Airlines (surging fuel costs), shipping companies (alternative route expenses), refiners (changing margin structures), and chemical/materials companies (naphtha supply instability) are all on emergency footing.
U.S. & International Community: The Trump administration is reviewing naval escort operations. The potential release of Strategic Petroleum Reserves (SPR) is a key variable. OPEC+ decisions on further cuts or increases are also in focus.
5. Durability Outlook: How Long Will This Last?
Short-term (~1 week): Depending on the intensity of military conflict, oil prices may spike further or stabilize. Visible progress on U.S. naval escort operations could bring partial relief.
Medium-term (1–3 months): Iran has publicly stated that it has "not yet used its advanced weapons," meaning a prolonged war scenario could push oil prices above $100/barrel.
Long-term: Warnings are beginning to emerge comparing this to the 1973 oil shock (a 4x surge in oil prices and global stagflation). Korea's energy intensity is lower than in the 1970s, but its dependence on global supply chains is far greater.
6. Secondary Issues & Derivative Debates
- Semiconductors & Battery Materials: Supply anxiety over Iran-routed materials such as helium and bromine → Samsung and SK Hynix on emergency alert
- LNG Price Spike: Qatari LNG also transits Hormuz → upward pressure on electricity and heating bills
- Flight Rerouting: Rapid increase in Middle East flight diversions and cancellations → travel and logistics disruption
- Global Inflation Reignited: The energy shock is a variable that could shake the U.S. Federal Reserve's rate-hold stance