Summary of Key Points
Following the outbreak of war between the United States and Iran in February 2026, international oil prices soared above $100 due to concerns about supply disruptions, particularly the blockade of the Strait of Hormuz. In June, when the two sides signed a ceasefire memorandum, oil prices rapidly dropped back to pre-war levels, experiencing a dramatic “rollercoaster” of fluctuations. The agreement included key provisions such as the cessation of military actions, the lifting of maritime restrictions, temporary exemptions for Iranian oil exports, and the provision of $300 billion in reconstruction funds, once again highlighting the significant impact of geopolitics on the global petroleum market.
I. The Key Provisions of the US-Iran Ceasefire Agreement That Directly Affect Oil Prices
This agreement is not merely symbolic; it contains several concrete measures directly related to the oil market:
1. Ceasefire and Strait Opening: Both parties committed to an immediate ceasefire, with Iran agreeing to clear the minefields and obstacles in the Strait of Hormuz within 30 days and allowing commercial vessels free passage for 60 days. This strait is a vital route for transporting one-third of the world's oil.
2. Lifting of Export Restrictions: The United States temporarily exempted Iran from restrictions on crude oil and petrochemical product exports (until August 2026), including allowing for banking and insurance transactions, effectively enabling Iranian oil to be sold globally again.
3. Reconstruction Funding: The US pledged to provide at least $300 billion in reconstruction funds for Iran, as well as unfreeze frozen overseas assets, which could help Iran restore its oil production capacity.
4. Gradual Lifting of Sanctions: The agreement stipulates that a final agreement will be negotiated within 60 days, after which the US will terminate all sanctions against Iran (both UN-imposed and unilateral), meaning Iranian oil could fully return to the international market.
II. The Oil Price “Rollercoaster” in Four Months: From $60 to $118 and Back to $70
Oil price movements in 2026 were akin to a steep ascent and descent:
- Pre-war Low: At the beginning of the year, Brent crude was around $60 per barrel due to global oversupply.
- Price Surge After War: The war began on February 28, and with the blockade of the Strait of Hormuz, prices skyrocketed. By March, Brent crude exceeded $100, reaching a peak of $118 (a 63% increase); Oman crude prices were even more dramatic, reaching $166 (a 137% increase), marking the fourth time in history that oil prices exceeded $100.
- Price Drop After Ceasefire: Actual ceasefire efforts led to a decline in prices. After the agreement was signed in June, Brent crude dropped to $73 on June 24, nearly returning to pre-war levels ($72 on February 27).
In simple terms: War → Reduced oil supply → Rising prices; Peace → Increased oil supply → Falling prices.
III. The Core Logic Behind Price Fluctuations: Supply Expectations
Price changes are essentially a reflection of supply and demand:
- Supply Panic During War: The blockade of the Strait of Hormuz resulted in a daily reduction of about 20 million barrels of oil traffic (30% of global trade), leading to panic and increased buying, thus driving up prices.
- Supply Recovery with Ceasefire: With the agreement, the strait was expected to reopen, and Iranian oil exports were anticipated to increase, leading to a decrease in demand and lower prices.
- Immediate Impact of Exemptions: The US’s decision to allow Iranian oil sales increased supply temporarily, causing prices to fall.
IV. Geopolitics as the “Switch” for Oil Prices: Another Lesson for the Global Market
The Middle East is a major global oil supplier (accounting for 60% of global reserves), with the Strait of Hormuz being a critical route for exports. This conflict has demonstrated:
- War = Rising Oil Prices: Major conflicts in the region, especially involving Iran and the strait, inevitably lead to sharp price increases due to concerns about supply disruptions.
- Peace = Falling Oil Prices: Once conflicts subside and supply becomes more stable, prices return to normal levels.
- Fast Market Reactions: It took only 10 days for oil prices to exceed $100 after the war began and another 10 days to drop back to pre-war levels, indicating the petroleum market’s extreme sensitivity to geopolitical events.
V. Concerns About the Long-term Stability of the Ceasefire
Although the agreement has helped stabilize prices, there are several concerns in the international community:
- Difficult Negotiations: During the initial talks, Trump threatened Iran, causing the Iranian delegation to leave; the negotiations only resumed with mediation by Qatar, indicating limited trust between the parties.
- The Memorandum is Not the Final Agreement: This is merely a ceasefire agreement, and a formal treaty will take another 60 days to negotiate, during which uncertainties (such as nuclear issues) could arise.
- Long-term Security of the Strait of Hormuz: The agreement calls for consultations with Oman and other countries on strait management, but past blockades have raised concerns about future security.
These uncertainties mean that oil prices may continue to fluctuate, given the Middle East’s volatile nature.
Conclusion
This event serves as a reminder of the significant influence of geopolitics on oil prices and the vulnerability of the petroleum market. For ordinary people, price changes directly affect fuel costs and other expenses (e.g., transportation). The underlying principle is simple: war leads to reduced supply and higher prices, while peace leads to increased supply and lower prices. The future direction of oil prices will depend on whether the US and Iran can reach a final agreement and whether there are further disruptions in the Middle East.