Why has ULSD diesel futures fallen 10.0% in a month while Brent rose 3.8%?
ULSD diesel futures are 4.723, down 10.0% over the past 30 days. Brent crude is 109.86 over the same stretch, up 3.8%. A finished product falling while its feedstock rises is unusual enough to check, so I pulled the rest of the desk's numbers.
Start with crude, because diesel is made from it. Brent is 109.86 now, and that 109.86 is also its 30-day high. The low over the same window was 71.6. Crude did not fall. It climbed most of the month and finished at the top of its range. A crude price near the top of its range usually pulls diesel up with it. This month it did not.
Gasoline tells the same story as diesel. RBOB is 3.144, down 9.8% over 30 days, almost the same drop as diesel. Both products fell together while the barrel they come from rose. When both finished fuels fall together against rising crude, the pressure is at the refinery.
The 3:2:1 crack spread confirms it. That spread is 55.15 now, down 13.45 over 30 days. It is the rough margin a refiner earns turning crude into gasoline and diesel, and it fell by roughly a fifth in a month. Crude up, products down, margin down. Whatever pushed diesel lower reached refiners through the gap between what they pay for a barrel and what they sell it for.
So the question becomes why products fell while crude held firm. Demand is the first place to look, and refinery utilization is the number closest to it. Utilization is 16.615, down 4.1% over 30 days, with a high of 17.586 and a low of 15.661. Refiners ran less. That usually signals either weaker demand for the product or margins thin enough that running flat out stopped paying. With the crack falling at the same time, thin margins look like the better read: when the spread compresses, refiners pull back runs rather than make diesel at a loss.
The easy answer breaks here. Lower runs should tighten product supply and lift prices. Refiners cut, yet diesel still fell 10.0%. That means the supply coming off was not enough to offset whatever hit the demand side, or product inventories were heavy enough going in that slower production barely dented them. The data desk does not carry a diesel stocks line this issue, so I cannot close that gap with a number. The direction I can give: product weak enough to fall 10.0% against rising crude and falling runs points to soft demand rather than short supply.
Natural gas is worth a glance because it feeds refinery and heating demand both. Henry Hub is 3.116, up 7.8% over 30 days. Storage is 3567, up 8.2%, and 3567 is also the 30-day high. Gas in storage climbed to the top of its range while the price still rose, which reads as normal injection-season building rather than a supply scare. Nothing there explains the diesel drop. Gas and diesel moved opposite ways this month, which makes the diesel move a crude-and-products story rather than an energy-wide one.
The retail side is where this lands for most operators. The diesel retail-wholesale spread is 1.456 now, up 0.133 over 30 days. Wholesale fell with the futures while retail lagged, so the gap widened. For a marketer who buys at wholesale and sells at the pump, that is a better month on each gallon, holding until street prices catch down to wholesale.
The wire muddies the picture more than it clears it. One headline reports US diesel at a $6.53 record, another has Marathon and other refiners facing a lower diesel price shift, a third ties high diesel to a spike in heating costs. The $6.53 figure comes from a source I would not price a load off, and it runs against our own desk number of 4.723, so I am setting it aside. The Marathon item fits the data cleanly: a lower diesel price with a crack down 13.45 is a harder quarter for a refiner's product margin, and the market appears to be pricing that into the refiners now.
What I am sure of: diesel fell 10.0% while crude rose 3.8%, so this was a refining-margin move, and the 3:2:1 crack falling 13.45 is the proof. Refiners ran less, utilization down 4.1%, consistent with margins too thin to justify full runs. What I am not sure of is the demand read underneath it, because I do not have a diesel stocks number this issue, and lower runs against a falling price could mean soft demand or heavy inventory or both. For an operator buying wholesale, the actionable piece is the spread: it is 1.456 and wider by 0.133, so the margin on each gallon sold improved this month even as the board fell, and that edge may narrow again whenever retail catches down to wholesale.
And that was just the data. See you tomorrow.