A Diesel Export Ban Would Reach the Gasoline Pump Too

Goldman Sachs co-head of global commodities research Daan Struyven told Bloomberg that a Trump administration diesel export ban raises four main questions for policymakers and could push domestic gasoline prices higher rather than lower.

The idea of restricting American diesel exports has moved from a fringe policy option to something oil traders now price as a live risk. Daan Struyven, co-head of global commodities research at Goldman Sachs, laid out the shape of that risk in an interview with Bloomberg Markets, framing it as four main questions the Trump administration would have to answer before it could institute a ban — and warning that the most intuitive argument for one, cheaper fuel for American consumers, may not survive contact with how refineries actually work.

His core point is counterintuitive enough to be worth stating plainly: a diesel export ban could push domestic gasoline prices higher. Not lower.

Why blocking diesel exports can raise gasoline prices

A refinery is not a switch. It is a plant that takes in a barrel of crude and produces a fixed-ish slate of products — gasoline, diesel and other distillates, jet fuel, fuel oil — in proportions that can be nudged at the margin but not rewritten on command. That physical reality is the hinge of Struyven's argument.

If US refiners are told they cannot sell diesel abroad, the diesel they would have exported has to go somewhere. Domestic diesel inventories build, the domestic price of diesel falls, and the margin a refiner earns on processing a barrel of crude — the crack spread, in trader shorthand — deteriorates. A refiner facing a worse margin has one obvious response: run less crude. And running less crude means producing less of everything, gasoline included.

That is the mechanism by which a policy designed to hold down fuel costs can end up tightening the market for the fuel most American households actually buy. Diesel is the price signal that moves freight, agriculture and construction. Gasoline is the price signal that moves voters. A ban would be aimed at the first and could land on the second.

The four questions the administration has to answer

Struyven's framing of the decision as four main questions is useful because it separates the political impulse from the operational detail. Any export restriction has to resolve a set of practical problems before it can be enforced, and each one has a cost attached:

• Scope. Does a ban cover all distillate, or carve out jet fuel and specific grades? The narrower the definition, the easier it is to route around.
• Geography. US refining is regionally segmented. The Gulf Coast is a global export hub; the Northeast depends substantially on waterborne supply. A single national rule does not treat those regions the same way.
• Allies and neighbors. Exports to nearby trading partners are not the same thing as exports to distant competitors, and exemptions create both diplomatic and arbitrage consequences.
• Refiner response. The question that determines whether the policy works at all: do refiners keep running at current rates and absorb a thinner margin, or do they cut runs? Struyven's analysis suggests the second response is the one that matters for consumers.

None of these has a costless answer. That is the argument against treating an export ban as a simple lever.

Demand destruction is already doing some of the work

The second half of Struyven's assessment points away from Washington entirely. He identified where he sees demand destruction taking hold in the global oil market — the point at which high prices stop being absorbed and start eliminating consumption, as buyers ration, substitute or simply do without.

Demand destruction is the market's own correction mechanism, and it is a slower, blunter instrument than policy, but it does not require an exemption list. When it is already under way, the marginal case for an administrative intervention weakens: prices are being resolved by the same forces a ban would try to override, and a ban risks arriving just as the cycle turns.

For investors, the distinction matters in how it shows up in the tape. Demand destruction compresses crude prices while leaving refining margins relatively intact, because it is the raw material losing bid. An export ban does something close to the opposite — it attacks the product margin directly. Refiners and integrated energy names are exposed to the second in a way they are not to the first.

A calm equity tape ahead of the decision

US equity benchmarks closed the prior session without registering much of a policy premium. The S&P 500 tracking fund (NYSEARCA: SPY) finished at $773.38, down 0.02% from a previous close of $773.50, inside a day range of $772.57 to $775.14, as of 20:00 GMT on Tuesday, 22 September 2026. The Dow 30 fund (NYSEARCA: DIA) closed at $518.00, off 0.34% from $519.78. The Nasdaq 100 fund (NYSEARCA: QQQ) was the outlier, closing at $747.46, up 0.81% on the day, near the upper end of a $740.93 to $748.35 range.

That split — a technology-led index higher, an industrial-weighted index lower, the broad market flat — is consistent with a market that is repricing input costs sector by sector rather than taking a directional view on energy policy. Freight-exposed and industrial names carry diesel costs directly. Large-cap technology does not.

What determines whether this becomes a real trade

Three things would turn an export-ban discussion into a market event. The first is any formal signal of scope — a draft rule, a definition of which products are covered, a stated regional carve-out. Traders will read the definition before they read the rhetoric.

The second is refinery utilization. If runs start falling ahead of a decision, refiners are telling the market they expect margins to be squeezed, and gasoline supply becomes the variable to watch. The third is the distillate curve itself: a market pricing a genuine domestic glut and an offsetting international shortage would show it in the spread between US and overseas diesel benchmarks long before any rule is signed.

The underlying tension is not going away. Diesel is the fuel of the physical economy and the one with the least slack in it. A government that wants to lower the price of moving goods has few direct levers, and the one under discussion — keeping barrels at home — works by making it less profitable to produce them. Struyven's warning is that the mechanism cuts both ways, and that the fuel most households notice is the one likeliest to feel it.

Frequently asked questions

Who is Daan Struyven?

Daan Struyven is co-head of global commodities research at Goldman Sachs. In an interview with Bloomberg Markets, he set out the four main questions the Trump administration would face if it instituted a diesel export ban, and explained why such a policy could work against domestic gasoline prices rather than in their favor.

Why would a diesel export ban raise gasoline prices?

Refineries produce a linked slate of fuels from each barrel of crude. If diesel cannot be exported, domestic diesel prices fall, refining margins deteriorate, and refiners have an incentive to process less crude overall. Lower crude runs mean less gasoline production as well, which can tighten gasoline supply and lift pump prices.

What is a crack spread?

A crack spread is the difference between the price of crude oil and the prices of the refined products made from it, such as gasoline and diesel. It is the standard measure of refining profitability. When the spread narrows, refiners earn less per barrel processed and have a financial incentive to reduce throughput at their plants.

What does demand destruction mean in oil markets?

Demand destruction is the point at which high prices stop being absorbed by consumers and start permanently eliminating consumption. Buyers ration usage, switch to substitutes, or go without. Struyven discussed where he sees demand destruction emerging in the global oil market, which acts as the market's own self-correcting mechanism on prices.

How did US equity markets close before the discussion?

As of the last trade at 20:00 GMT on September 22, 2026, the S&P 500 fund SPY closed at $773.38, down 0.02%. The Dow 30 fund DIA closed at $518.00, down 0.34%. The Nasdaq 100 fund QQQ closed at $747.46, up 0.81%, the strongest of the three benchmarks on the day.

What should investors watch next on this policy?

Three markers matter: any formal definition of a ban's scope and regional carve-outs, US refinery utilization rates as a signal of how refiners expect margins to move, and the spread between domestic and international diesel benchmarks, which would price a domestic glut against an offsetting shortage abroad.

Sources

• How a Diesel Export Ban Could Impact US Fuel Prices — Bloomberg Markets