Why did Brent fall 4.3% to 87.97 this month while diesel climbed 6.2%?

Brent crude is 87.97, down 4.3% over the past month. That is a strange direction for a month when the wire is full of Middle East supply scares and burning refineries. India's import bill rose sharply because the Iran war choked Middle Eastern oil and quadrupled freight through Hormuz. So a working operator has a fair question. If the supply picture is that ugly, why is the barrel cheaper than it was thirty days ago, and does anyone buying fuel see a dime of it?

The first thing worth checking is the 30-day range on Brent, because a net move can hide a lot. The high was 114.44 and the low was 71.57. So the 4.3% is not a slow bleed. Crude ran up toward 114 on the Hormuz disruption and came back down to 87.97, close to a quarter off its own high for the month. The war premium went in, and a good part of it has since come out. The net number is small only because the round trip nearly cancelled itself.

The next question is what pulled it back down. U.S. petroleum inventories are now 428.815, up 4.2% over the past 30 days. Stocks are building. When barrels pile up in storage while the headlines say supply is tight, the market is telling you the fear was priced ahead of the physical loss. Crude eased because inventory came in, even though the risk in the wire has not gone away.

The move I actually care about for operators is what crude did to the products, and that is where the easy read breaks. The obvious read is that a cheaper barrel makes everything at the rack cheaper. Gasoline held up that story. RBOB gasoline is 2.943, down 6.6% over the month, a bigger fall than crude itself. Its 30-day high was 3.761 and its low was 2.756, so it is sitting near the bottom of its own range. Gasoline buyers get real relief here, and gasoline retailers who bought high and are selling into a falling wholesale market are the ones carrying that adjustment.

Diesel refused to follow. The U.S. diesel price is 5.454, up 6.2% over the same 30 days, moving the opposite way from the crude it is made from. ULSD diesel futures back that up at 4.136, up 3.8%. So two fuels came off the same barrel this month and went in opposite directions, with gasoline falling further than crude while diesel climbed. Anyone whose costs run on distillate should watch that split closely this month.

The reason is sitting in the refinery headlines. Ukrainian drone strikes hit Russia's Afipsky refinery, and Perm suspended operations after a strike of its own, with more refineries reported burning on the night of August 24 to 25. Every barrel of distillate those plants are not making is a barrel the rest of the market has to cover. Crude can fall on inventory and a fading war premium while diesel climbs on lost refining capacity. The crude is there, but the plants that turn it into diesel are down.

For refiners still running, that combination reads well. The 3:2:1 crack spread is 58.08, down only 1.19 over the month. Even with crude down and diesel up, the blended margin barely moved off a high level. A refiner buying that cheaper barrel and selling diesel into a short market is having a good month it earned by keeping its units up while others are down. The margin is still there, and 1.19 off is close to holding flat.

On the retail side of diesel, the picture is quieter than the price move suggests. The diesel retail-wholesale spread is 1.017, up just 0.002 over the month. The retail margin on diesel is basically unchanged. So the 6.2% climb in diesel is not marketers widening their take. It is wholesale cost rising and retail passing it straight through at the same margin they held before.

The one group with no relief anywhere is the people burning the diesel. FreightWaves reports diesel prices climbing while spot freight rates fall, so trucking costs and freight pay have come apart. A carrier is paying more per gallon this month and getting paid less per load. Cheaper crude does nothing for them, because the fuel they actually buy is the one that went up.

So the honest answer. Brent fell 4.3% mostly because the premium markets put on the Hormuz disruption has been leaking back out, and because U.S. inventories built while it did. I am confident of that much, because the range and the stock number both point the same way. What I am sure of for operators is that the fall is not general relief. Gasoline buyers get a real break while diesel buyers pay more. Refinery outages are tightening distillate faster than a softer barrel can loosen it. What I cannot tell you is how long the split holds. If the Russian plants that are down come back, diesel could follow crude lower. If more capacity comes off, the barrel could keep falling while diesel keeps climbing. The one thing I would not do this month is quote a diesel customer a lower price because I saw crude drop.

And that was just the data. See you tomorrow.