Oil markets jolted higher on Tuesday after Washington and Tehran traded direct fire for the first time in more than a month, reviving anxiety that the world’s most important oil chokepoint could tighten further just as global inventories are running thin.
Brent crude futures climbed $1.18, or 1.3%, to $91.67 a barrel by 07:39 GMT, while U.S. West Texas Intermediate rose $1.27, or 1.48%, to $87.03. The moves mark the sharpest single-session gain in oil benchmarks in weeks, as traders recalibrated the odds that a fragile, months-old truce between the two countries is unraveling for good.
The renewed exchange follows a now-familiar pattern in a conflict that began in earnest in late February, when U.S. and Israeli strikes on Iranian military and nuclear sites triggered a sweeping retaliation from Tehran, including an effective closure of the Strait of Hormuz, the narrow waterway between Iran and Oman through which roughly a fifth of the world’s seaborne oil and a fifth of its liquefied natural gas normally pass.
A ceasefire in the spring and a memorandum of understanding signed in June had briefly raised hopes that shipping through the strait could return to something resembling normal.
Instead, both sides have accused each other of violations, with Iranian forces intermittently targeting vessels deemed noncompliant with routes. Tehran has tried to impose, and U.S. forces are answering with strikes on Iranian military assets along the waterway.
President Donald Trump’s threat of further strikes on Monday came after the first direct exchange of fire between the two countries since late July, when a prior round of hostilities had cooled into what analysts described as more of an economic standoff than an active shooting war, one increasingly waged through sanctions on Iranian oil exports rather than missiles.
“The tit-for-tat missile exchanges between the US and Iran bring validation to those who believe that even if not a ‘forever war,’ this conflict will run and run,” said PVM analyst John Evans, capturing the market’s growing resignation that no durable resolution is imminent.
Not all the day’s signals pointed toward escalation. Iranian President Masoud Pezeshkian said Tuesday that Iran would immediately reciprocate if Washington returned to its commitments under the June interim agreement language that traders parsed as a narrow opening for de-escalation, even as it underscored how far apart the two sides remain on what “compliance” actually means.
Mediation efforts led by Qatar and Oman to reopen the strait on a durable basis have so far failed to produce a breakthrough.
The physical evidence of the standoff is visible in shipping data. Kpler figures showed that visible commodity vessel transits through the Strait of Hormuz held at around five ships a day on Monday, well below the 10-day average of roughly 14, and a fraction of the roughly 100 vessels a day that historically passed through the strait before the war.
None of Monday’s five transiting vessels were liquid tankers, a detail underscoring how thoroughly crude and product flows through the strait have been disrupted even as some dry-bulk and container traffic trickles through.
The risks to that traffic were reinforced Tuesday when the United Kingdom Maritime Trade Operations agency reported that a tanker had been struck by three projectiles while sailing out of the strait, the latest in a string of attacks on commercial vessels that has periodically punctuated the conflict since February.
No casualties or environmental damage were reported in Tuesday’s incident.
Behind the day’s price move lies a more structural concern: the cushions that have kept global oil markets functioning through more than six months of intermittent disruption are wearing thin.
Satellite tracking suggests roughly 6 million barrels a day are still moving through Hormuz, a level analysts at ANZ noted remains well below pre-conflict flows.
“In the meantime, the buffers the global oil market has been relying on are becoming exhausted,” ANZ analysts wrote in a note, pointing to U.S. commercial inventories nearing minimum operational levels and warning that China’s capacity to keep its own imports subdued will be tested as seasonal demand picks up.
That combination a chokepoint still running far below capacity, stockpiles with little room left to absorb further shocks, and a conflict that has repeatedly defied predictions of resolution leaves oil markets exposed to further volatility should the current exchange of strikes escalate rather than fade, as prior flare-ups have tended to do since the war began in February.
WHAT YOU SHOULD KNOW
Oil rose because renewed U.S.-Iran strikes threaten Hormuz, a strait already running at a fraction of normal traffic and with U.S. and Chinese inventory buffers nearly exhausted; there’s little cushion left to absorb further disruption. That’s the key risk: not just this one clash, but a market with no slack if it escalates.
