Ethanol: The CBOT Biofuel Futures Contract

Key Takeaways

• Ethanol futures on the CBOT hedge corn-based denatured fuel ethanol.
• The legacy CBOT contract covers 29,000 gallons, the volume of one rail car.
• US ethanol prices hinge on corn costs, gasoline prices, and the Renewable Fuel Standard.
• The ethanol crush spread compares ethanol revenue against the cost of corn.

What Ethanol Futures on the CBOT Are

Fuel ethanol is alcohol made mostly from corn in the United States, then denatured so it cannot be consumed and blended into gasoline. Over 95 percent of US ethanol comes from corn.

CME Group lists the Denatured Fuel Ethanol futures contract on the Chicago Board of Trade (CBOT). The legacy contract covers 29,000 gallons, the capacity of one rail car, and calls for ethanol meeting the ASTM D4806 specification. Prices are quoted in US dollars per gallon.

The Intuition

An ethanol plant buys corn, converts it to fuel, and sells the output, often months apart. If corn rises or ethanol falls in between, the plant's margin can vanish.

Futures let the plant lock in selling prices and let blenders fix their costs. The contract also lets traders take a view on the gap between corn and ethanol, which is the plant's core economics. Because ethanol is a blendstock for gasoline, its price is tethered to the energy market as well as the grain market.

How It Works

The contract settles by physical delivery. Delivery has historically run through in-tank transfers and from ethanol plants to Chicago-area terminals. The deliverable grade is denatured fuel ethanol meeting ASTM D4806.

Legacy CBOT contract = 29,000 gallons (one rail car)
Deliverable grade = denatured fuel ethanol, ASTM D4806
Quoted in US dollars per gallon

Three forces drive the price. Corn is the main feedstock, so corn futures set the input cost. Gasoline prices set what blenders will pay, since ethanol competes as an octane source. The Renewable Fuel Standard (RFS), created under the 2005 Energy Policy Act and expanded in 2007, mandates blending volumes and generates tradable credits called Renewable Identification Numbers (RINs) that also feed into the price. The EIA publishes weekly ethanol production figures that traders watch for supply signals.

Worked Example

The key relationship is the ethanol crush spread, which measures a plant's gross margin. A simplified version compares the value of ethanol output to the cost of the corn that made it.

Suppose corn trades at 4.50 dollars per bushel and one bushel yields about 2.8 gallons of ethanol. The corn cost per gallon is 4.50 divided by 2.8, or about 1.61 dollars per gallon, before counting byproducts like distillers grains.

If ethanol futures trade at 1.90 dollars per gallon, the rough gross margin over corn is 1.90 minus 1.61, or 0.29 dollars per gallon. On one 29,000-gallon contract, a 5-cent move in that spread is 0.05 times 29,000, or 1,450 dollars. A plant can sell ethanol futures and buy corn futures together to lock in that margin.

Common Mistakes

1. Ignoring the corn link. Ethanol is a corn product. A trader who watches energy prices but not corn misses the largest single driver of ethanol economics.

2. Forgetting RFS and RIN dynamics. Blending mandates and RIN credit prices shift demand and value. Policy changes can move ethanol independently of corn or gasoline.

3. Confusing contract sizes. The legacy CBOT contract is 29,000 gallons, while some other ethanol contracts use 42,000 gallons. Sizing a hedge off the wrong figure throws off the position.

4. Overlooking physical delivery. The contract delivers physically through tank transfers. A trader holding into expiry without delivery capability faces an unwanted obligation.

5. Treating the crush as fixed. Byproduct values, natural gas costs, and yields all shift the real plant margin. A simple corn-to-ethanol spread is an approximation, not the full picture.

Frequently Asked Questions

What are ethanol futures on the CBOT in simple terms? Ethanol futures on the CBOT let producers and blenders lock in a price for corn-based fuel ethanol. One contract covers 29,000 gallons, about a rail car.

How do ethanol futures affect investment decisions? The ethanol price reflects corn costs, gasoline demand, and biofuel policy, so it signals farm and energy conditions at once. Producers use the contract to protect processing margins.

What is a real-world example of ethanol hedging? An ethanol plant sells ethanol futures and buys corn futures together, locking in the crush spread so a later jump in corn or drop in ethanol does not erase its margin.

How can investors avoid mistakes trading ethanol futures? Track corn prices and RFS policy alongside the ethanol quote, confirm the contract size before hedging, and avoid holding a physical-delivery contract into expiry.

How is ethanol different from a pure energy contract like crude oil? Ethanol is an agricultural product blended into fuel, so its price depends on corn and biofuel mandates as well as gasoline, while crude oil is driven mainly by global energy supply and demand.

Sources

1. CME Group. "FAQ: Denatured Fuel Ethanol." https://www.cmegroup.com/articles/faqs/faq-denatured-fuel-ethanol.html
2. CME Group. "Denatured Fuel Ethanol Futures." https://www.cmegroup.com/markets/energy/biofuels/denatured-fuel-ethanol.html
3. U.S. Energy Information Administration. "Weekly Ethanol Production." https://www.eia.gov/dnav/pet/pet_pnp_wprode_s1_w.htm
4. U.S. Energy Information Administration. "U.S. ethanol production and the Renewable Fuel Standard RIN bank." https://www.eia.gov/todayinenergy/detail.php?id=11551

Disclaimer

This article is educational content only and is not financial advice. Nothing here is a recommendation to buy, sell, or hold any security. Consult a licensed advisor before making investment decisions.