US-Iran Deal Boosts Supply Expectations, Middle East Crude Spot Prices Fall Into Discount
Claire Weston
After the US and Iran reached a framework deal to reopen the Strait of Hormuz, Dubai crude's spot premium swung from +$2.06 to −$0.46 per barrel in a single day — all three Middle East benchmarks have flipped to discounts, marking a full reversal of the supply-squeeze premium structure.
What happened in a single day?
Dubai crude's premium to swaps — the spot premium, measuring how much more spot oil costs than futures — fell to −$0.46/bbl on Tuesday. On Monday it was still +$2.06/bbl. This means → the market flipped from "spot is scarce" to contango (futures more expensive than spot) in one session.
Oman and Murban spot differentials dropped to −$0.67 and −$0.49 the same day. All three Middle East benchmarks turned negative.
In plain terms = at peak tightness in March, Dubai and Oman spot premiums exceeded $60/bbl and Murban topped $50/bbl. Now the premiums are gone — buyers are getting discounts instead.
Why does reopening the strait hit this hard?
Kpler senior crude analyst Naveen Das noted that even before the deal, roughly 4 million barrels per day were already rerouting around the Strait of Hormuz. This means → a formal reopening would release millions of barrels currently trapped in floating storage — tankers sitting at sea waiting to unload — directly boosting physical supply for the Dubai benchmark.
Once that floating-storage crude hits the market in bulk, regional pricing faces strong downward pressure.
In plain terms = oil couldn't move through the strait, so it piled up on tankers at sea. Now the channel is set to reopen and all that backed-up oil floods in at once — prices drop.
Why is Middle East crude now heading to Europe and America?
Reuters cited traders saying four to five VLCCs (very large crude carriers) are shipping Murban and Das crude to Europe, chartered by ExxonMobil.
ExxonMobil and TotalEnergies are estimated to be moving 13–15 million barrels of Middle East crude to the US and Europe, including Upper Zakum, Murban, Oman, and Iraq's Basra Medium.
This reflects a reshaping of trade flows: the price drop unlocked an arbitrage window previously open only to Asia — Murban is now cheaper for European buyers than US WTI.
What is the knock-on effect on US crude?
The WTI-to-Asia arbitrage window has been shut since early June, dragging down US benchmark export demand. This means → US crude can't find Asian buyers, and inventory pressure is building back home.
WTI Midland's differential to Houston-grade crude flipped to a premium on Tuesday — the first time since late May. In plain terms = inland crude became more expensive relative to coastal crude, a sign that the export channel is clogged and oil is piling up at the wellhead.
What is happening on the Asian demand side?
Chinese-led Asian refiners have been cutting throughput during the high-price period and shifting to alternative sources such as US crude. Middle East buying interest was already weakening before the deal was announced.
Abu Dhabi National Oil Company (ADNOC) has sold at least 30 million barrels of spot crude to Asian refiners and traders this month, and continued adding offers this week. This means → the supplier is actively cutting prices to chase volume, pushing spot prices lower still.
Will the discount keep widening?
The actual timeline for reopening the Strait of Hormuz remains uncertain — a framework deal is not the same as ships transiting freely.
The pace of floating-storage release is the key variable: a concentrated release could widen discounts further; a gradual drawdown may let the market absorb the supply.
In plain terms = signing a deal doesn't mean oil flows tomorrow. What really sets the price path is "how fast the backed-up barrels come out."
Content is for reference only, not financial advice.