Feedstock procurement inputs
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What this calculator measures
Corn is usually the largest single operating cost at an ethanol plant, so a small pricing mistake can move annual margins by hundreds of thousands of dollars. The point of this calculator is not to predict the market perfectly. Its job is narrower and more practical: it compares an unhedged procurement plan with a partially hedged one, then shows the expected per-bushel cost, the bearish floor price, and the difference between those choices after storage, freight, and option expense are counted. That makes it useful for merchandisers, plant managers, lenders, and board members who need a disciplined way to discuss corn coverage instead of relying on instinct or scattered spreadsheet tabs.
The model follows the same logic a plant procurement desk uses in day-to-day planning. First, you define how many bushels the facility expects to buy. Next, you enter the local cash bid and the futures price available for hedging. Then you decide how much of that demand to cover, whether to pay an option premium on the hedged share, and what you believe harvest futures might be in a normal outcome versus a bearish one. Finally, you add costs that often get ignored in quick conversations but matter greatly in real margins: storage and freight differential. The calculator blends those inputs into one expected hedged revenue figure and one bearish hedged figure, then converts them into a price per bushel that can be compared to staying long cash.
Each input has a specific interpretation in the math. Annual corn procurement is the total volume you need to secure over the planning horizon. Current cash bid is today’s local benchmark before the hedge comparison is made. Nearby futures sold is the board price used on the hedged share. Expected harvest basis improvement is entered in cents per bushel and can be positive or negative; a positive value means you expect local cash prices to improve relative to futures by harvest, while a negative value means you expect basis to weaken. Share of bushels hedged determines how much volume receives the futures gain or loss. Put option premium is treated as a cost on the hedged share only. Expected harvest futures price and bearish stress futures price let you compare an ordinary planning case with a downside case. Storage cost and freight differential are deducted from all bushels, because physical movement and carrying cost do not disappear just because a futures hedge exists.
That structure matters because ethanol hedging is really a blending problem. A plant is rarely fully fixed or fully floating. It usually carries some bushels that are protected, some that remain open, and a basis view layered over both. The calculator reflects that split rather than pretending the whole book behaves the same way. In the expected scenario, hedged bushels earn the expected cash price and also gain from the original futures sale if harvest futures settle lower than the hedge entry. Unhedged bushels simply follow the expected cash price. In the bearish scenario, the cash price is recalculated using the lower futures assumption, and the futures gain on the hedged share becomes larger. The result is a floor price that shows how much pain the hedge absorbs when the board drops hard.
At the broadest level, the tool turns a list of inputs into a result. The page already includes that general mathematical view, and it is worth keeping because it reminds users that any scenario output is only as good as the assumptions entered:
Procurement hedging also behaves like a weighted sum because the final price is built from different price components and cost components applied to different slices of the bushel count. That is why the second preserved MathML block still fits this page:
For this calculator, one of the simplest derived values is the local cash price expected at harvest. The model treats it as harvest futures plus the entered basis improvement:
Once that local price is known, the hedged portion gets an additional futures gain or loss based on the difference between the futures price sold and the futures price assumed at harvest. The unhedged portion does not receive that offset. After that, the calculator subtracts option premium on the hedged share and subtracts storage plus freight on the full bushel volume. The finished total is divided by total bushels to produce a blended cost per bushel. That final per-bushel number is often what plant leadership wants, because it fits directly into a margin discussion alongside ethanol value, distillers grains revenue, and energy cost.
A worked example makes the logic concrete. Using the default values already loaded in the form, a plant plans to buy 1,200,000 bushels. The current cash bid is $5.45, nearby futures sold are $5.60, basis is expected to improve by 18 cents, and 70% of the bushels are hedged. The plant pays $0.12 per hedged bushel for put protection, expects harvest futures at $5.10 in the planning case, and stress-tests a bearish $4.60 futures outcome. Storage is $0.08 per bushel and freight differential is $0.11. Under those assumptions, the calculator returns an expected hedged revenue of $6,427,200 and an average hedged cost of about $5.3560 per bushel. The comparable unhedged expected value is $6,108,000, or $5.0900 per bushel. In other words, the hedge lifts the expected scenario by $319,200 because the futures sale captures value as the board moves from $5.60 to $5.10, even after the option premium and physical costs are deducted.
The bearish case is where the protection becomes most visible. If harvest futures fall to $4.60, expected cash price declines as well, but the futures gain on the hedged share becomes larger. The calculator then produces a bearish hedged revenue of $6,247,200, which works out to a floor price of roughly $5.2060 per bushel. The same bearish market without the hedge would yield about $5,508,000, or $4.5900 per bushel. That difference is the model’s downside protection value. It does not mean the plant becomes immune to all procurement pain; basis could behave differently than expected, and real operating conditions may introduce other costs. It does mean the hedge reduces exposure to a futures drop in a way that can be measured in dollars rather than debated in general terms.
When you read the result panel, think of it as a decision aid rather than a trading signal. Hedged revenue under expected futures is the total procurement value of the mixed strategy in the planning case. Average hedged corn cost per bushel converts that result into a single price. Downside floor price shows where the blended cost lands in the bearish case. Net lift compares the expected hedged case to staying unhedged. Difference versus current cash bid benchmark asks whether the modeled hedge improves on buying everything today at the spot bid, after costs. Downside protection compares the bearish hedged case to the bearish unhedged case. Together, those numbers help answer the practical question every plant faces: how much stability do we gain, and what does it cost us?
The most important assumptions are straightforward. Basis is applied as one improvement figure to both hedged and unhedged bushels. Storage and freight are treated as linear per-bushel costs. The option premium is modeled as a simple cash outlay rather than a more complex option payoff tree. The tool does not estimate ethanol crush margin, fermentation yield, natural gas cost, RIN value, or lender covenant structure. That is intentional. By keeping the model focused on corn procurement mechanics, it stays fast enough for scenario work while still being detailed enough to expose the tradeoff between coverage and flexibility.
Why basis matters so much for Iowa ethanol plants
Iowa plants buy corn in one of the most competitive grain regions in the world. That is an advantage, but it also means local pricing can move quickly when export programs, river logistics, rail service, weather, or nearby plant demand change. A manager may believe the board is overvalued and still get surprised by a local basis rally. Or a plant may sell futures confidently, only to watch freight and storage eat away the apparent win. That is why this calculator separates board exposure from local cash economics instead of treating all price movement as one number. It is built for the practical question a procurement team faces every week: if we cover a certain share of our grind now, what blended corn cost are we really creating once local conditions and carrying costs are added back in?
The effective hedged price can be summarized with the preserved MathML expression already on the page. It captures the idea that hedged bushels, unhedged bushels, futures gains, and costs all stack together before being divided by the total volume:
Read that expression in plain language. Bh is the hedged share of bushels, Bu is the unhedged share, Cash is the local cash value implied by harvest futures plus basis, Gf is the hedge gain or loss from the futures position, and Costs collects option premium, storage, and freight. Dividing by total bushels converts the total dollar outcome back into the per-bushel figure that boards, bankers, and plant accountants can compare across scenarios.
Using the default values in the form, the comparison looks like this:
| Scenario | Per-bushel price (USD) | Total revenue (USD) |
|---|---|---|
| Hedged – expected futures | $5.3560 | $6,427,200 |
| Hedged – bearish futures | $5.2060 | $6,247,200 |
| Unhedged – expected futures | $5.0900 | $6,108,000 |
| Unhedged – bearish futures | $4.5900 | $5,508,000 |
The table makes two ideas easy to see. First, the hedge can improve the ordinary planning case if the futures sale was made above the expected settlement and the option cost is not too heavy. Second, the bearish scenario shows why plants tolerate paying premium and carrying some hedge complexity: the hedge creates a noticeably higher floor. For a high-throughput facility, even a dime per bushel matters. A move of fifty or sixty cents per bushel across more than a million bushels can decide whether a quarter feels merely disappointing or truly damaging.
There are still real-world limits. Basis does not always move symmetrically across every bushel. Storage can jump in steps when owned capacity fills and third-party space is needed. Freight can change with diesel, rail service, or destination demand. Option structures can be more complicated than a simple protective put, and operational profitability depends on more than corn alone. Even so, this calculator is valuable because it isolates the grain-buying decision and makes the hedge discussion explicit. If a proposed coverage level looks attractive only because storage or option costs were forgotten, the tool will expose that. If a bearish floor price still looks too thin after hedging, the tool will expose that as well.
A good workflow is simple. Run a base case with your best estimate for harvest futures and basis. Then run a more defensive case with weaker futures or a smaller basis improvement. Finally, vary only one input at a time. Raise hedge ratio to see how much more downside protection you buy. Increase option premium to see how insurance cost erodes expected lift. Adjust freight to reflect destination risk. Those small scenario changes are often more informative than arguing about a single perfect forecast. The calculator helps the team speak in tradeoffs: more coverage buys more protection, but every layer of protection carries a cost and may reduce participation if the market turns favorable.
Quick planning note
Use the base case to see whether the hedge adds value in an ordinary market, then use the bearish case to judge whether the floor price is strong enough for your risk policy.
Basis Lock mini-game
This optional arcade game turns the hedge-ratio idea into a fast timing challenge. Drag across the gauge or use the left and right arrow keys to set hedge coverage before each market shock settles. Deep bearish futures breaks usually call for higher coverage, while bullish squeezes reward leaving more bushels open. The math in the calculator stays unchanged; the game simply helps you feel the tradeoff.
Best score is saved on this device. A sharp run usually comes from increasing coverage before hard downside shocks and relaxing it when the market turns friendly.