Key takeaways:

  • Donald Trump announces retaliation following Iranian strikes on U.S. positions in Jordan.
  • Brent crude closed up 2.7%, at $90.49 per barrel.
  • An Iranian official vows a response dozens of times stronger than any U.S. attack.

Donald Trump has promised new strikes against Iran following the first exchange of fire between the two countries in over a month. "We are going to hit them hard," the U.S. president told Fox News, announcing a response to the Iranian strikes. Brent crude closed Monday up 2.7%, at $90.49 per barrel.

An Iranian missile breached U.S. air defenses in Jordan, with others intercepted, according to the U.S. president.

Two sides minimizing their own escalation

The terminology used by both sides is worth comparing.

The U.S. Central Command described Sunday's strike on Larak Island as a limited and precise action. For its part, an Iranian official told Reuters that this resurgence of violence was a limited and contained confrontation between the two capitals.

However, the same official vowed a response dozens of times stronger than any American attack, claiming that the Iranian retaliation demonstrated that no target in the region is beyond Tehran's reach.

Why Larak Island matters

The targeted location is far from trivial. Situated at the mouth of the strait, it allows the Revolutionary Guards' navy to observe and attack commercial traffic using anti-ship missiles, mines, and drones.

Farzin Nadimi, a researcher at the Washington Institute for Near East Policy, details its equipment. Iranian forces maintain programmable rocket-fired mines there, designed to quickly choke off shipping lanes. The island houses a port for missile boats in the north, as well as an underground network of discreet coastal batteries, with pre-spotted firing points.

Conflicting traffic figures

A discrepancy in assessment is worth noting for readers. From the White House, Donald Trump claimed Monday that the strait was in excellent condition, citing numerous ships passing through the previous night with naval assistance, and an average of 30 ships per night.

Available data paints a different picture. Maritime analytics firm Windward counted approximately 16 passages per day last week, compared to over 130 before the conflict.

The U.S. president also described Iran as a bankrupt nation with no currency, failing to pay its soldiers, and whose leaders are largely dead—which he claimed would not stop him from striking them.

Economic warfare as a backdrop

Washington had used the month of relative calm to prioritize financial pressure. Treasury Secretary Scott Bessent expanded secondary sanctions on Tehran, with measures he suggests could upend the global financial system.

The actual execution remains modest, however, limited thus far to revoking access to the U.S. financial system for the Emirati branches of an Egyptian bank—far from the promised "D-Day" for the economy.

The Treasury Secretary links the two fronts: he argues that Iran is militarily lashing out at its adversaries because it is losing the economic war, asserting that Tehran is taking these sanctions very seriously.

AI-generated video endorsed by the White House

One episode warrants attention. After Sunday's exchange of fire, the U.S. president released an AI-generated video showing strikes on Kharg Island, Iran's main oil export terminal, despite no such attack ever taking place.

JD Vance justified the release as a message to the Iranians:

The president is telling them... "Look, you are shooting at merchant ships, you are behaving like a terrorist nation. You need to stop, or there will be consequences."

A bogged-down conflict before the elections

The war is entering its sixth month, talks have failed, and neither side is achieving a decisive result. The U.S. president has failed to reopen the strait—which carried a fifth of the world’s oil and gas before the conflict—and is facing hostile public opinion just months before the November midterm elections.

Ron Dermer, an advisor to Israeli Prime Minister Benjamin Netanyahu, told a conference in Las Vegas on Monday that the U.S. and Israel were about 95% aligned on the path forward, advocating for a policy of systematic military response to any Iranian provocation.

On the Iranian side, reformist President Masoud Pezeshkian maintains that his country does not seek war, while still promising a firm response to any aggressors.

What now?

The trajectory of oil prices is the main transmission channel to the global economy. Brent crude settling above $90 fuels U.S. inflation at the precise moment the Federal Reserve is weighing a rate hike, now anticipated at roughly 64% for the September 16 meeting.

Two points to watch this week: First, the nature of the announced retaliation, the scale of which will determine whether this sequence remains in the realm of limited strikes or escalates into something more. And second, the details of the next round of banking sanctions, which the Treasury has been touting for several days without providing specifics.

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