What the US–Iran Ceasefire Means for Oil Markets, Cushing Inventories, and Brent Crude Prices

When President Trump announced on June 14, 2026 that a ceasefire agreement with Iran had been finalized, it marked the most concrete step toward reopening the Strait of Hormuz since the conflict began on December 28 . About a fifth of the world's oil normally transits the Strait, and its effective closure sent crude prices to levels not seen in years—Brent briefly hit $138 per barrel on April 7 . The newly signed deal ends the US naval blockade, restores toll-free shipping through the Strait, and extends a fragile ceasefire for another 60 days. But it is not a peace treaty, and it leaves unresolved questions about Iran's nuclear program and the durability of the truce.

The agreement lands at a precarious moment for US crude markets. Inventories at the Cushing, Oklahoma delivery hub have fallen to just 21.64 million barrels, less than 2 million barrels above the operational floor . With global buyers still scrambling for non-Hormuz barrels, the US export machine has drawn Cushing stocks down for seven straight weeks. How quickly—and whether—Iranian crude flows resume will determine whether those stockpiles stabilize or sink further.

Analyst forecasts for Brent crude reflect that uncertainty. Pre-war estimates clustered around $56–$67 per barrel . Mid-crisis actuals and revised forecasts shot to $85–$117 . Now, with a ceasefire in place, the outlook depends on which recovery scenario materializes.

What's in the ceasefire deal

The June 14 ceasefire is best understood as a memorandum of understanding (MOU) that extends the initial April 8 two-week truce, which had already been lengthened by 60 days in late May . It contains several operational commitments, but it does not constitute a comprehensive peace accord, a nuclear agreement, or a missile deal . Here are the core provisions:

• Reopening of the Strait of Hormuz: Shipping will resume toll-free, with a target of restoring prewar activity levels within about 30 days . Iran has agreed to clear the mines it deployed in the waterway during the conflict .
• Lifting of the US naval blockade: The United States will remove its blockade on Iranian ports and the Strait . This was framed as an immediate, reciprocal step.
• Ceasefire and cessation of hostilities: Both sides declared an immediate and permanent cessation of military operations across all fronts, including in Lebanon .
• Sanctions relief framework: While not fully detailed in the MOU, the agreement opens the door to sanctions relief for Iran contingent on its compliance .
• Nuclear program negotiations: The extended 60-day window is intended to allow talks on permanently ending the conflict and curbing Iran's nuclear activities .

Pakistan and Qatar acted as key mediators throughout the process . An official signing ceremony was scheduled for the days following the announcement in Switzerland .

It is important to recognize what this deal is not. It is not a binding peace treaty. It does not resolve disputes over Iran's ballistic missile program or its regional proxy forces. And its success depends entirely on both parties sticking to the terms during the 60-day extension period—a period that follows a truce which had effectively collapsed in the days before the announcement .

Cushing inventories: dangerously close to the floor

The supply emergency in the Strait of Hormuz triggered an extraordinary drawdown of crude stored at Cushing, Oklahoma, the delivery point for West Texas Intermediate (WTI) futures and the largest oil storage hub in the United States.

By the numbers (as of June 5, 2026):

• Current stock level: 21.64 million barrels, down from 22.44 million the prior week and 24.09 million a year earlier . Some data providers report slightly different figures (21.6–22.4 million barrels) depending on the exact measurement date, but all confirm a critically low level .
• Capacity utilization: Approximately 28–29% of Cushing's roughly 76 million barrels of total capacity . Normal levels typically range around 40 million barrels, meaning utilization would be closer to 50–55% in a balanced market .
• Pace of decline: Inventories have fallen for seven consecutive weeks . Between early April and early June, they dropped by 11.3 million barrels, according to Wood Mackenzie . In the week ending June 5 alone, the draw was between 801,000 and 1.125 million barrels .
• Distance from the operational floor: Cushing's operational minimum is widely estimated at around 20 million barrels . That leaves less than 2 million barrels of headroom before the facility begins to struggle with pipeline and blending logistics . Wood Mackenzie has warned that if draws persist at current rates, Cushing could reach that floor within weeks .

The proximate cause is surging US crude exports. With much of the world cut off from Middle Eastern supplies, global buyers have turned aggressively to US grades. Overall US crude inventories have slumped to 434 million barrels, down about 64 million barrels—or roughly 7.5%—since the war began . Cushing has borne the brunt because it serves as a key logistical hub for moving domestic crude to the Gulf Coast for export.

Analyst forecasts: from pre-war surplus to mid-crisis shock

To grasp the scale of the disruption, it helps to start with the pre-war consensus. Before the conflict, analysts were almost uniformly bearish on crude.

• Goldman Sachs (January 2026): Brent averaging $56/bbl for the full year, with a Q4 low of $54 .
• J.P. Morgan: Brent around $60/bbl .
• Reuters poll (December 2025): Consensus of 34 analysts at roughly $67/bbl .
• Russian analysts (Euler, BCS): $61–$65/bbl .
• EIA (March 2026 STEO): Brent at $57.69/bbl for the year .

The prevailing narrative was oversupply: OPEC+ production, rising non-OPEC output, and sluggish demand growth in China were expected to push OECD inventories higher and prices lower .

That narrative collapsed when the Strait of Hormuz was effectively shut. By April, Brent had spiked to $138 on April 7 and averaged $117 for the month . Analysts scrambled to revise their models.

Mid-crisis forecasts (March–May 2026):

• EIA (May 2026 STEO): Full-year 2026 Brent raised to roughly $96/bbl; assumes Strait flows do not fully normalize until early 2027 . The April STEO had projected a Q2 peak of $115/bbl .
• Goldman Sachs (March reset): Base case of $85/bbl for full-year 2026, up from $77. The base case assumed Strait flows at just 5% of normal for six weeks, followed by a gradual one-month recovery . Goldman later raised its Q4 2026 forecast to $90 .
• Morgan Stanley (April 13): Q2 2026 at $110/bbl, Q3 at $100/bbl, 2027 at $80/bbl. The bank emphasized that supply chains would take months to stabilize even after a Strait reopening .
• Bank of America (March): Full-year average of $77.50/bbl, up from $61 prior. The bank laid out multiple scenarios, with a worst-case Brent average of $130 if disruptions extended into the second half of the year .

Post-ceasefire outlook:
The June 14 agreement removes the most immediate supply risk, but analysts caution that prices will not snap back to pre-war levels overnight. The EIA's latest outlook, which already assumed a slow normalization, put Brent at $89/bbl in Q4 2026 and $79/bbl in 2027 . Morgan Stanley's call for $80 in 2027 also assumes a gradual recovery . Goldman's Q4 base case sits around $90, with upside risks that could push prices above $100 if Gulf exports stabilize more slowly than expected .

The wide spread between the pre-war consensus ($56–$67) and the post-crisis baseline ($80–$100) reflects several persistent factors: the time required to clear mines and restore safe passage, the logistical challenge of bringing Iranian production back online, and the political risk premium that will linger as long as the ceasefire remains an MOU rather than a permanent settlement.

The immediate test will be whether Cushing inventories stabilize. If Iranian crude begins flowing through the Strait within weeks and US exports normalize, the pressure on domestic storage could ease. If the ceasefire frays or the mine-clearing process drags on, Cushing could approach its operational floor—an event that would likely send WTI prices higher regardless of the broader Brent trajectory.