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Just seven ships, all with a prior link to Iran, were observed making the voyage out of the Persian Gulf. Normal transits in both directions are more like 135 a day.

Benchmark U.S. crude was 6.8% higher on April 9 at $100.79 a barrel. Brent crude, the international standard, rose 3.7% to $98.24 per barrel.

Shipowners are placing “huge volume requests” for insurance cover as they look to transit the Strait of Hormuz following the U.S.-Iran ceasefire deal.

Rio Tinto and Century Aluminum raised the premium on aluminum blocks known as billets by about 3 cents a pound, or $110 a ton, above prewar levels.

Exxon, which also said first-quarter earnings from its energy-products division would be lower, is among the first of the supermajors to disclose the war’s impact.

While shipowners and insurers lined up to welcome the ceasefire, they also warned that more details will be needed to determine if safe transit is possible.

The price for a barrel of benchmark U.S. crude oil plunged 15.6% to $95.32. Brent crude, the international standard, tumbled 13% to $95.12 per barrel

Love’s Travel Stops opened new locations in Laurel, Mont., and Albuquerque, N.M., the company announced April 2.

The 68% surge in crude prices since the Iran war began roughly five weeks ago is incentive enough to compel American oil executives to ramp up output.

Constraints in infrastructure and supply are likely to keep U.S. oil flows well below headline capacity figures often cited at around 10 million barrels a day.