Diesel is $5.60. The pump number is the same for everyone. What each company actually pays for the gallon is not, and the difference has almost nothing to do with the truck stop.

Diesel does not have a deep futures market of its own, so the industry hedges with the NYMEX ULSD contract, which still trades under its old symbol HO from when it was heating oil. One contract is 42,000 gallons, or 1,000 barrels, delivered in New York Harbor. A fleet that burns a million gallons a month and wants to know what next March costs can buy March contracts today. If the price goes up, the contracts gain the extra fuel cost. If it goes down, the contracts lose what the fuel saved. Either way, the fleet knows its number, which is the entire point. Budget certainty is worth more to a carrier with 5,000 trucks than being right about oil’s direction.

Around the futures sit the products a bank or a supplier will sell you. A swap fixes the price outright. A cap, which is a call option, sets a ceiling and lets you enjoy the downside for a premium. A collar bounds the price on both ends for less. The simplest version, available to any fleet a supplier will extend credit to, is a physical fixed-price contract: you agree to buy so many gallons a month at a set price, delivered to your yard, and the supplier hedges it himself.

The catch is basis. The hedge tracks New York Harbor. Your truck fills in Oklahoma. The gap between the contract price and the price at your rack or your pump is basis, and basis is where hedging programs get hurt. A Gulf Coast hurricane, a pipeline outage, or a regional refinery going down can move pump prices while ULSD futures barely react, and the fleet finds out it was hedged against the wrong thing. Sophisticated programs layer physical contracts, which have no basis risk, with financial ones, which do, and adjust how much they hedge to how stable their region’s basis has been.

Realistically, fleets of 50 trucks and up, with a CFO and a bank line, because a single ULSD contract is 42,000 gallons and the margin calls are real money. Below that, the tools are a fuel card with a negotiated discount, a 30- to 90-day fixed-price deal with a supplier, and the fuel surcharge.

The surcharge is the small carrier’s hedge, and it lags. Most surcharge programs key off the EIA’s weekly national average, published Monday for the prior week, with a base price and a per-mile escalator. In a flat market, it works. In a market that moved $1.87 in a year, most of it in a few weeks, the surcharge is always chasing. The carrier fuels at this week’s price and gets paid at last week’s, or on contracts written when the base was $3.67, at a formula nobody has renegotiated since 2022. That gap, a few cents a gallon on every mile, is the margin. The carriers who insisted on weekly-adjusted surcharges when they signed their contracts are whole. The ones who took a flat rate to win the freight are eating it.

Who won this one? Any fleet that locked in fixed prices or bought paper before the Strait of Hormuz became a daily headline is running on last year’s diesel. That is not luck; it is what the hedge desk is for, and it is why the largest carriers’ fuel cost per mile in their next 10-Q will not look like yours. Brokers, in a lagging surcharge market, sit in the middle: they collect the shipper’s surcharge on the published index and pay the carrier on the contract, and every week of lag is spread in their favor. Shippers on index-based contracts are paying the full $5.60 on every load, which is why the pressure is coming down the chain on rates.

Who lost. The owner-operator on a flat-rate load board, buying at the pump every day, with no contract, no discount, and a surcharge that was set by someone else. And the fleet that hedged the other way, the one that decided last winter the market was too high and bought nothing, or worse, sold its hedges to book a gain. That fleet is now buying at $5.60 with no paper, and its competitors have a dollar-a-gallon on it.

The futures curve is in backwardation: the contracts for next spring trade below today’s spot price, which is the market’s way of saying it expects the squeeze to ease. The EIA’s August forecast, written before this week’s record, had diesel at $4.86 by year-end. Both of those are predictions about a 21-mile channel that no fleet manager in America influences. A hedge does not make you right about the strait; it makes you indifferent to it.

What to do if you are not Knight-Swift. Renegotiate the surcharge first. Weekly index, a base price that reflects 2026, an escalator that pays in tenths of a cent. That is the single most important hedge a small carrier has, and it costs nothing but a conversation. Second, ask your supplier for a fixed-price gallon commitment for the next quarter; even 30 days of certainty is worth having in a market like this. Third, know your cost per mile to the penny, because an unmeasured hedge is a bet. And fourth, the cheapest hedge of all: every tenth of a mile per gallon is worth about $1,700 a truck this year, and it is available at the pedal.

The pump price is a number everybody sees. The price a fleet actually pays is a decision it made months ago. That is the game, and right now it is sorting the industry.