Diesel Is at the 93rd Percentile and the Federal Lever Is 315,000 Barrels

Dec heating oil cracks 93.73 $/bbl against Dec WTI, the 93rd percentile of 2 years, with 37 of 504 sessions closing at or above it. Dec gasoline cracks 27.36, the 82nd percentile and a 60-session low. The gap between them, 66.37 $/bbl, sits at the 97th percentile against a 2-year median of 16.98. On 21 October the Energy Department answered with a 315,000-barrel exchange from a reserve of roughly 1m barrels. The political lever is smaller than the market's daily arbitrage, and the spread is the instrument that prices that.

A crack spread is the refinery's margin: take a barrel of crude, cook it into a product, and the difference between what the product sells for and what the crude cost is the crack, in dollars per barrel. There are two of them that matter, and they are not the same good. Gasoline is a summer, driveway, discretionary molecule. Distillate - heating oil and diesel out of the same cut - is a winter, freight, tractor and furnace molecule, and it has no substitute when the temperature falls. When the two cracks separate, the market is not pricing crude at all. It is pricing which barrel of the barrel it needs. On 28 October the ratio of the two is 3.43 to 1, the 2nd widest of 504 sessions - behind only 23 October at 3.48. Dec heating oil cracks 93.73 $/bbl at the 93rd percentile; Dec gasoline cracks 27.36 at the 82nd, a 60-session low. The spread between them is 66.37, the 97th percentile, against a 2-year median of 16.98 and only 15 higher closes in 504 sessions. That is where the midterm enters. Heating oil is a Northeast ballot-box price, and the federal government's visible answer to it, announced 21 October with offers due 27 October and deliveries by 13 November, was 315,000 barrels - about 13.2m gallons, roughly one-third of a reserve that holds about 1m barrels. The question this piece answers is not whether that is enough. It is what a market does when it learns the size of the lever, and which price moves first: the crude, or the spread between the two products.

The two cracks stopped moving together

Distillate and gasoline cracks both ran hot through the summer, and both peaked inside the same 2 weeks - gasoline on 1 October, distillate on 13 October. Then they split. Dec heating oil cracked 93.73 $/bbl on 28 October, 94.02 the prior session and 95.09 a week earlier, the 93rd percentile of 504 sessions with a 2-year median of 30.41. The 2-year high is 107.45 on 13 October.

Gasoline went the other way. Dec RBOB cracks 27.36 $/bbl, from 28.78 and 30.49, the 82nd percentile against a median of 13.73 - and the lowest close of the last 60 sessions, set on 28 October.

One product is being repriced for a physical constraint that reports weekly, inventories and tanker bookings, and the other is being repriced for the end of the driving season. That is the first thing the tape says, and it is why a single crude number cannot carry the read.

The spread is the instrument, not the crude

Net the two cracks and the disagreement becomes one number. Dec distillate minus Dec gasoline is 66.37 $/bbl on 28 October, 65.24 the session before and 64.60 a week ago. Against 504 sessions of history that is the 97th percentile, with 15 closes higher and a 2-year median of 16.98. The 2-year high is 72.59, set on 16 September.

Nothing about that number requires a view on crude. A refiner that can shift yield between gasoline and distillate earns this spread by choosing the barrel the market is short of, and the spread is what that option is worth. It is the cleanest expression of the political fact in this piece, because it is insulated from the dollar, from the funding leg, and from whatever the front-month futures contract happens to be doing.

The same calendar one and two years ago the equivalent spread was 19.40 and 6.81 $/bbl, with front-month WTI at 60.15 and 67.38. Distillate cracks were 40.11 and 22.02. The complex has not drifted here. It has been re-rated.

What the 21 October exchange actually priced

The mechanism is not sentiment, and it does not run through the crude price. It runs through the size of the only federal lever that touches a product crack directly. On 21 October the Energy Department authorised an exchange of up to 315,000 barrels of ultra-low sulfur heating oil from the Northeast Home Heating Oil Reserve - about 13.2m gallons, roughly one-third of the approximately 1m barrels the reserve holds. Offers were due 27 October and deliveries are to be complete by 13 November. It is an exchange, not a sale: awardees return the same volume plus a cash premium between January and September 2027, and the premium rises the later the barrels come back.

Read that as a market participant reads it. The federal government was asked, in a week when the distillate crack was at the 94th percentile, to defend the Northeast heating bill, and the instrument it reached for is measured in hundreds of thousands of barrels and returns the product by next winter. A release is a statement about the buffer behind it. At 315,000 barrels the statement is that there is no strategic distillate buffer of consequence, and that the marginal gallon has to be bid away from freight and export rather than supplied from storage.

This is the political transmission channel the midterm actually uses. A distillate squeeze is a heating bill in Maine and a diesel bill on every truck that moves a grocery pallet, and it lands in the CPI basket that the Fed reads. A government that could blunt it would. The exchange says the tool available is a rounding error against the physical position, so the price has to do the work. That is what takes the spread to the 96th percentile rather than the outright crude to a new high.

The roll the tape did not tell you about

The front-month Brent quote on 28 October is 111.41, against 113.88 the prior session - a fall of 2.47. That is a contract change, not a sell-off. The quoted front rolled off December into February, and the December contract it left behind settled at 115.39 on 28 October against 113.88 the day before: up 1.51. The February contract that the quote now tracks settled at 111.41 against 109.41, up 2.00. Both months rose. The headline fell.

West Texas did not roll: Dec settled 101.91 against 99.90, up 2.01. So the same session produced a crude that rose, a Brent quote that fell, and a product complex that split - and only one of those three is a price.

The curve behind the roll is the second half of the story. Brent December carries 3.98 $/bbl over February, the 98th percentile against a 2-year median of 0.11. Dec WTI carries 1.72 over Jan, the 92nd percentile. Dec heating oil carries 3.64 over Jan. A backwardation that steep is the market paying for barrels now and refusing to pay for them later, and it is what makes the prompt crack worth holding and the deferred one cheap.

Where the midterm reaches the crack

One, the heating bill. The mechanism is a delivered price in a cold state, not a futures level. A Northeast voter experiences distillate as a fill-up and a furnace, and the federal response is the reserve exchange. The instrument is the Dec distillate crack, and it is already at the 93rd percentile with the reserve one-third drawn.

Two, the export valve. The mechanism is arbitrage: a barrel can leave the Gulf Coast instead of heating a house. The instrument is the Brent-WTI spread, 13.48 $/bbl on Dec contracts, the 99th percentile against a 2-year median of 3.93 with only 7 higher closes in 504 sessions. A wide waterborne premium is the market saying the barrel that clears is the one that floats.

Three, the government's own inventory. The mechanism is expectation, not volume: 315,000 barrels cannot move a crack, but the decision to use the reserve at all tells the market how much product the state is willing to hold against a squeeze. The instrument is the spread between the two product cracks, because that is where a thin product buffer lands when the crude itself is not scarce.

Where this is wrong

First, the spread. A Dec distillate-minus-gasoline close below 45.00 $/bbl would say distillate scarcity is unwinding rather than being repriced. That is well below the 66.37 print and below the 20-session mean, so it cannot be reached by noise inside a week. It would invalidate the mechanism, not merely hurt it.

Second, the carry. A Brent Dec-Feb spread below 1.00 $/bbl, against 3.98 today and a 2-year median of 0.11, would say the curve has stopped paying for prompt barrels. The prompt crack trade is funded by that backwardation; if it goes, the trade is a level, not a position.

Third, the crack itself. A Dec heating oil crack below 80.00 $/bbl would put the product back inside the band it held for most of the past 2 years. The 2-year median is 30.41, so 80.00 is still extreme - but it is the level at which the distillate leg stops being the story.

Fourth, the policy. A second exchange, or a refill announcement that returns the 315,000 barrels early, would remove the scarcity signal without changing the physical position. It would be the cleanest evidence that the lever is a communication device.

Notes

1. Cracks are computed as product price x 42 gallons per barrel minus the same-dated WTI contract: Dec heating oil (HOZ26) and Dec RBOB (RBZ26) against Dec WTI (CLZ26). Settles pulled 2026-10-28T13:32:24Z. Single daily values, not an index base.

2. Percentiles are computed against the 504-session history from 28 October 2024 to 28 October 2026 in the same file. Front-month continuous series are used only for the same-calendar-day comparison across years.

3. Northeast Home Heating Oil Reserve: DOE authorisation of 21 October 2026, up to 315,000 barrels, about 13.2m gallons, approximately one-third of the roughly 1m barrels held; offers due 27 October, deliveries by 13 November, return of product plus a cash premium between January and September 2027. Terminals at New Haven, Chelsea and South Portland.

4. Par yields in the Levels line are the 23 October Treasury par print, the most recent in the site's par file at the time of writing; the energy marks are 28 October. The two dates are stated separately rather than reconciled.