Skip to content
Briefings are running a touch slower this week while we rebuild the foundations.See roadmap
Iran Conflict 2026
4JUN

US lets Iranian oil fund Iran's war

4 min read
11:25UTC

The US is at war with Iran and deliberately allowing Iranian tankers through the strait it describes as a kill box — because blocking them would break the oil market.

ConflictDeveloping
Key takeaway

Washington has an implicit oil price ceiling that overrides maximum economic pressure on Iran.

Treasury Secretary Scott Bessent told CNBC on Monday that the United States is deliberately allowing Iranian oil tankers through the strait of Hormuz. "The Iranian ships have been getting out already, and we've let that happen to supply the rest of the world," he said 1.

The US is spending roughly $1.4 billion per day on military operations against Iran . It has described Hormuz as a "kill box" with pre-registered Iranian fire zones . Every ally it asked to send warships has refused . And through the same waters, Iranian crude continues to flow — the revenue that funds the missiles, drones, and naval mines the US and its partners are absorbing daily.

The logic is economic. Gulf oil exports have dropped at least 60% since February. Brent traded at $106.18 on Monday — up from $67.41 on 27 February. Saudi spare capacity faces daily drone attack. The Shah Gas Field is offline. Fujairah oil loading is suspended. Iran exports roughly 1.3 million barrels per day. Interdicting that flow would tighten a market already producing below demand by the widest margin the IEA has recorded . The Administration has calculated that the inflationary cost of blocking Iranian exports exceeds the strategic cost of letting Tehran fund its defence.

Bessent predicted prices would fall "much lower" than $80 after the war 2. He named no timeline. Ten days earlier, he told Sky News escorts would begin "as soon as militarily possible" while Energy Secretary Wright said the Navy was "simply not ready" for them . TankerTrackers.com data showed 11.7 million barrels of Iranian oil had already transited to China by 10 March . Washington's non-interdiction policy means that figure is still climbing. The distance between stated war aims — destroying Iran's military capability — and operational reality — permitting the adversary's primary revenue stream — is the war's defining economic contradiction.

Deep Analysis

In plain English

The US is at war with Iran — conducting air strikes and military operations — but the US Treasury Secretary admitted on live television that American forces are letting Iranian oil tankers sail through the Strait of Hormuz freely. The reason is economic: Iran produces roughly 1.5 million barrels of oil per day. If the US stopped all of that oil reaching world markets on top of the 60% Gulf supply reduction already caused by the war, oil prices would likely surge well beyond $106, potentially triggering a global recession. So Washington has made a calculated trade-off: allow Iran to keep funding its own war effort in exchange for preventing an oil price spiral damaging to American consumers and allied economies. The problem is that this trade-off has now been said out loud on television — which weakens America's ability to credibly threaten Iran with economic isolation in this conflict or any future one.

Deep Analysis
Synthesis

Bessent's statement is the first explicit official acknowledgement that US economic warfare against Iran is partial by design, not merely by enforcement failure. This fundamentally degrades the credibility of the US sanctions regime. Any state observing this conflict will understand that US financial sanctions carry an implicit market-stability escape valve — a conclusion that weakens deterrence in future confrontations with any oil-producing adversary.

Root Causes

The US Strategic Petroleum Reserve holds approximately 350–400 million barrels — insufficient to offset a full Iranian export cutoff of approximately 1.5–2 million barrels per day for more than six to nine months without exhausting emergency reserves. No allied producer holds spare capacity capable of simultaneously replacing both Gulf disruption and Iranian exports. Washington has therefore calculated that enforcing full economic warfare on Iran is financially impossible without triggering a domestic energy crisis it cannot absorb politically.

Escalation

The primary escalation risk is domestic political rather than military. If the US Congress or influential media frame Bessent's admission as 'funding the enemy', the administration may face irresistible pressure to reverse course and stop Iranian exports. A forced policy reversal would immediately remove the only material buffer currently softening global oil prices — producing an acute price spike that itself carries geopolitical escalation potential across energy-importing economies.

What could happen next?
  • Meaning

    The US has an implicit oil price ceiling above which it modifies its own war aims and enforcement posture.

    Immediate · Assessed
  • Consequence

    Iran retains significant oil revenue to fund its defence despite sustained US kinetic strikes on Iranian territory.

    Short term · Assessed
  • Risk

    Congressional backlash framing Iranian oil tolerance as 'funding the enemy' could force a policy reversal and trigger an acute oil price spike.

    Short term · Suggested
  • Precedent

    US economic warfare against oil-producing adversaries now has a documented market-stability override, weakening future sanctions deterrence credibility.

    Long term · Assessed
First Reported In

Update #38 · Israel enters Lebanon; Hormuz pact fails

CNBC Bessent· 17 Mar 2026
Read original
Causes and effects
Different Perspectives
China
China
Beijing's MOFCOM Blocking Rules constrain OFAC enforcement on the mainland; China has not corroborated Trump's verbal account of any bilateral summit, and the rial's failure to hold its Rubio bounce, combined with the IRGC's stablecoin rail closure, increases Chinese yuan-denominated oil-payment exposure through Hormuz.
Israel
Israel
IDF Chief Zamir said on 3 June there is no ceasefire for his forces even as Israel signed the Washington Lebanon framework requiring Hezbollah withdrawal south of the Litani; a UNIFIL peacekeeper was killed by mortar near Marjayoun on the same day, exposing the gap between the diplomatic framework and a ground advance that has not stopped.
Bahrain
Bahrain
The IRGC struck Bahrain on 3 June as its sirens sounded and its PAC-3 magazine neared exhaustion; excluded from Rubio's 2 May emergency resupply, Bahrain received a 50-round Federal Register notice on 1 June on an 18-month delivery timeline, meaning it is defending the US Fifth Fleet headquarters on the last rounds it has.
Qatar
Qatar
Qatar offered $6bn under OFAC Licence L-2 restrictions and sent Ghalibaf's delegation home empty-handed; the $6bn ceiling is a legal constraint, not a negotiating floor, and Rubio's no-sanctions-relief testimony means Qatar cannot revise it without White House action that has not been requested.
Kuwait
Kuwait
Kuwait expelled two Iranian diplomats within 24 hours of the airport strike, the strongest and fastest Kuwaiti diplomatic move of the conflict, while keeping the full mission in place to preserve a communication channel; it has now invoked Article 51 self-defence, filed a formal protest, and expelled diplomats, exhausting its formal toolkit short of full rupture.
United States
United States
Trump narrated a weekend deal while the channel Rubio described under oath, Khamenei's written-only couriers with a 3-to-5-day lag, cannot answer at that speed; CENTCOM called the airport strike deliberate, calculated and unjustified. The House 215-208 vote gave Congress its first on-record war-powers position against the deployment Trump has run without a signed instrument for 96 days.