Why has U.S. diesel climbed to $5.652, up 6.4% over the past month?
Diesel is 5.652 today, up 6.4% over the past 30 days, and that same number is the 30-day high. A price at the top of its own month is the kind of thing an operator feels before payroll does, so the question is plain: what pushed it, and does it hold.
The obvious read is that everything at the refinery got more expensive at once. RBOB gasoline says otherwise. Gasoline is 3.087, down 4.2% over the same 30 days, off its own 30-day high of 3.761. So the two main products a refinery makes moved apart this month. One climbed, the other gave back ground. Whatever lifted diesel did not lift the barrel across the board, or gasoline would have come along.
Crude supply is the next place to look, and the inventory number cuts against a shortage story. U.S. petroleum inventories are 428.91, up 6.0% over 30 days. More barrels in tank, not fewer. If diesel were pricey because the country was running short of oil to make it from, inventories would be falling, and they are up six percent. So the pressure is not a raw-crude squeeze. It is sitting somewhere between the barrel and the diesel rack.
Refiner margins say the same thing. The 3:2:1 crack spread is 59.0 now, down 4.24 over 30 days. That spread is the rough margin a refiner earns turning three barrels of crude into two of gasoline and one of diesel. It fell this month even as diesel rose, because the gasoline giveback offset what diesel added. Refiners as a group are not banking this diesel move as a fatter overall margin.
That leaves the diesel side by itself, and the wire has a name for the worry. Goldman Sachs warned this week that refinery disruptions could trigger a global diesel shortage. A bank flagging a risk is not a shortage on the ground, and I would hold it at arm's length. It fits what the numbers already show, though. Diesel is tight on its own account. Gasoline is not. Crude is not. When one product runs up while the barrel it comes from does not, the story is usually distillate supply and the plants that make it, and a warning about refinery disruptions is a warning about exactly those plants.
There is counter-evidence, and it is worth keeping in view. In Ukraine, gas stations raised A-95 gasoline prices on August 31 while diesel got cheaper for them the same day, the opposite of the U.S. benchmark, where diesel is the one rising and gasoline the one falling. Diesel is not moving one direction everywhere, so a single global diesel headline is worth reading against local prices like these.
The retail-wholesale spread says who is carrying the U.S. move for now. The diesel retail-wholesale spread is 1.384, up 0.183 over 30 days. It measures the gap between what the retailer pays at the rack and what they charge at the pump, and it widened this month. A retailer whose street price lags a fast wholesale run often sees that gap stretch before it settles, so part of today's spread may be timing rather than a durable gain, and it could give back as the pump catches up or the rack cools. For the moment the pump has moved a little more than the rack under it, and the marketer in between is holding the difference. Fair enough on a month when the rack ran.
The natural gas figures are here too and they do not bear on diesel much. Henry Hub is 2.926, up 6.5% over 30 days, off a 30-day high of 3.343. Gas storage is 3184, up 3.2%. Firmer gas raises the cost of running a refinery and making hydrogen for the diesel units, so it is a small push in the same direction, but it is a rounding factor next to product supply, not the driver.
My read is this. Diesel at 5.652 is up because distillate itself is tight, not because crude is short and not because the whole barrel got dear. Gasoline down 4.2% and inventories up 6.0% both rule out a broad crude squeeze, and the crack at 59.0, down 4.24, says refiners are not banking this as a better month overall. The near-two-dollar gap between this month's diesel high and its low tells you how fast the distillate side can move when the plants are the constraint. What I am sure of is the shape: product-specific, distillate-led, with the retailer holding a widened spread of 1.384 for now. What I am not sure of is whether it holds. A bank's shortage warning and one refinery outage are not the same thing, the Ukrainian print shows diesel easing elsewhere, and a retail spread that stretched this fast can narrow. If you buy diesel, I would cover near-term needs and not assume 5.652 is a new floor.
And that was just the data. See you tomorrow.