Investment thesis · Live
The Iran war prices gasoline, the harvest prices corn: America's ethanol plants sit on the widening gap
A war driven fuel rally meets a cheap record corn crop, and almost the entire spread lands in the crush margins of US corn ethanol producers.
Published September 7, 2026 · 120-day horizon · supply and demand
Basket return
+1.1%
equal weight, since publication
The market over the same window
-1.8%
benchmark for this basket
Edge over the market
+2.9%
in percentage points
Causal chain: Hormuz exclusion zone lifts crude and gasoline → Large US corn harvest keeps feedstock cheap → 45Z pays per gallon on carbon intensity → Ethanol sells against gasoline, buys against corn → High pump prices pull E15, E85 and exports → Crush margin widens on a fixed cost base → Corn ethanol producers and grain handlers
What this thesis rests on
Each one is a statement that has to be true. We go back to every live thesis on a schedule and check these against public sources, so each leg carries either what we found or the date we look next.
Checked every 14 days. First review due September 21, 2026.
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Front-month CME corn futures settle below 5.00 dollars per bushel on a majority of trading days between publication and 5 January 2027.
financial · Open
First check due September 21, 2026
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The EIA weekly US regular retail gasoline price averages above 3.40 dollars per gallon over the 90 days following publication.
financial · Open
First check due September 21, 2026
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Green Plains produces at least 200 million gallons of ethanol in the quarter ending 30 September 2026 and idles no additional plant during the horizon.
operational · Open
First check due September 21, 2026
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Green Plains reports positive consolidated adjusted EBITDA in each of the two quarters it reports within the horizon.
financial · Open
First check due September 21, 2026
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The 45Z clean fuel production credit remains available to corn starch ethanol producers, with no reduction of eligible pathways, through 31 December 2026.
regulatory · Open
First check due September 21, 2026
Two prices, two continents, one spread
The Strait of Hormuz is now a shooting gallery: Washington has struck tankers, Tehran has promised to widen its exclusion zone, and crude keeps grinding higher. Gasoline follows crude with a lag of days. Corn does not. The price of corn is set in Illinois, Iowa and Nebraska by acreage, rainfall and a harvest that is now being cut, and it has no causal link at all to a naval standoff in the Gulf. That disconnect is the whole thesis: one side of the American ethanol equation is being repriced by a war, and the other side is being repriced by a combine.
Companies in the basket
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This is analysis, not investment advice and not a recommendation to buy or sell anything. We publish it and track it in public, mistakes included. Any decision is yours and yours alone.