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Symbolic image: Oil above $100 and a new US tariff round hit the world economy at onceSymbolic image

Oil above $100 and a new US tariff round hit the world economy at once

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Brent crude has closed above $100 a barrel for the first time since late May, with the Strait of Hormuz blocked by the US-Iran war and the Red Sea disrupted by Houthi attacks on Saudi oil vessels. In the same week the United States began enforcing duties of 10% to 12.5% on more than 60 economies, its third tariff regime in under a year. Analysts warn that the two shocks reinforce each other instead of cancelling out, compounding inflation and growth risks worldwide.

What happened

Two shocks are reaching the world economy at the same time. Brent crude has closed above $100 a barrel for the first time since late May. The Strait of Hormuz has been blocked since the outbreak of the US-Iran war, and Houthi attacks on two Saudi oil vessels have turned the Red Sea into a second disrupted chokepoint. The decisive element is less the price level than the loss of Saudi Arabia's fallback: the kingdom had already moved most of its exports away from the Gulf, so the two disruptions now overlap instead of offsetting one another, and rerouted cargoes have fewer safe alternatives. In parallel, the United States is operating its third tariff regime in under a year. Duties of 10% to 12.5% on more than 60 economies took effect at 12:01 a.m. on Friday, timed to the expiry of the universal 10% tariff they replace, so that coverage never lapsed for a single day. The White House is basing the new duties on Section 301 of the Trade Act rather than the legal authority used before, and the measures have already drawn lawsuits, moving the dispute from the level of the rates to the legal ground beneath them. The New York Times compresses the combination into one line: tariffs are back, but this time there is a war in the Persian Gulf and oil has hit $100 a barrel. The shared assessment in the reporting is that energy costs and import duties push in the same direction on prices, while both weigh on output.

What's new

Neither shock is new on its own. Tariffs have been the dominant trade story for a year, and crude had already traded above $100 in late May before falling back. What is different now is the overlap. The oil market has lost the redundancy it still had during earlier phases of the Gulf war: with the Red Sea disrupted alongside Hormuz, Saudi Arabia's alternative export route no longer functions as a buffer, which is why the current price move is read as structural rather than as a spike on headlines. On the trade side, the change is legal rather than numerical. The new duties are only marginally higher than the universal 10% tariff they replace, but they rest on a different statute, and the resulting court challenges make the durability of the regime, not its level, the open question. The framing has shifted accordingly: where earlier rounds were reported as the primary shock, this one arrives as an additional burden on an economy already absorbing an energy shock.

What could happen next

If the chokepoints stay disrupted and the duties stay in force, both effects would continue to feed into consumer prices through fuel and imported goods at the same time, while higher input costs and uncertain trade rules weigh on investment decisions. Should shipping through the Red Sea or Hormuz be restored, or exports be rerouted at scale, the oil component could ease and trade policy would again become the main channel through which prices and growth are affected. A third path runs through the courts: if the legal basis for the Section 301 duties is narrowed or struck down, rates could change or lapse, but the intervening period of unresolved litigation would itself leave importers and exporters planning against rules that may not hold.

How the camps see it

  • United States: Washington is enforcing its new duties of 10% to 12.5% on more than 60 economies without interruption and is defending them on the legal basis of Section 301 of the Trade Act.

  • Iran: Iran is at war with the United States, the conflict in which the Strait of Hormuz has been blocked since the fighting began.

  • Saudi Arabia: Riyadh, whose oil vessels were attacked in the Red Sea, has lost the alternative export route it had built up as a fallback to the Gulf.

Also involved

Houthi forces in Yemen

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