Old-Crop / New-Crop Spread

The old-crop / new-crop spread is the price difference between futures contracts for the current harvest year’s grain (old crop) and the coming year’s harvest (new crop). It embeds storage costs, interest rates, insurance, and market expectations about the next harvest, and is a key tool for hedging and managing carry decisions in grain markets.

The carry equation

Imagine a grain trader holds 1,000 bushels of corn in a silo from September (end of harvest) through June (just before the next harvest). The cost to do this includes:

• Physical storage (lease of silo space): roughly $0.15–$0.35 per bushel per year
• Financing (cost of the capital tied up in inventory): interest on the value of the grain
• Insurance (protection against fire, spoilage, theft): a small percentage of value
• Shrinkage (natural moisture loss and handling spillage): typically 0.5–1% per year

In a well-functioning market, the new-crop futures price (due to be delivered next harvest) should trade at a premium to old-crop futures equal to these carry costs. If old-crop December corn trades at $4.50 and new-crop December trades at $4.65, the 15-cent premium should theoretically compensate the holder for storage, financing, and insurance over the nine-month carry period.

This relationship is called contango—a situation where forward prices are higher than spot prices, creating a “roll yield” for long-term holders. The opposite, called backwardation, occurs when old crop trades at a premium; this signals supply tightness or immediate demand.

Why the spread matters

The spread directly affects storage and financing decisions by farmers, elevators, and grain merchants. If the spread is wide (new crop trading at a large premium), storage becomes economically attractive—operators can sell old crop forward, lock in a gain, and finance carrying costs. If the spread is narrow or negative, it’s cheaper to sell immediately rather than hold.

Central to this logic is the carrying cost. In a typical year, the spread widens to 15–30 cents per bushel to reflect the full carry. During harvest (late summer and early fall), the spread is often narrow because new crop is just beginning and market participants are not yet willing to price in nine months of carry; as the calendar moves forward, the spread typically widens. By late spring, as the new harvest approaches, the spread compresses again.

Crop-year boundaries and roll mechanics

Grain crop years don’t align with calendar years. U.S. corn’s marketing year runs September to August; soybeans are November to October. Futures contracts reflect these cycles: December corn futures settle in mid-December but represent the full 2024 harvest; March corn represents carryover of that same crop into 2025; July represents the end of that crop year; September represents the beginning of the new crop.

A trader “rolling” a position from December to March is moving from an old-crop contract (representing grain already in storage) to a new contract month that still represents the same crop year but the following delivery month. The cost or gain on this roll captures the monthly carry.

Supply expectations and the spread

While carry costs provide a theoretical floor for the spread, market expectations about next year’s harvest can widen or narrow it beyond pure carry economics. If drought threatens next year’s corn crop, new-crop futures might trade at a large premium because the market expects tight supply. In this scenario, the spread widens beyond carry costs alone—it incorporates a crop-risk premium.

Conversely, if expectations are for record new-crop yields and ample supply, new-crop futures might trade only slightly above old-crop despite carry costs, or even at a discount (backwardation) if the market fears oversupply and wants to incentivize current storage and reduce new-crop production expectations.

Trading the spread

Grain traders implement old-crop / new-crop spread trades by taking opposing positions in the two contracts. A long old-crop / short new-crop trade (selling the spread) bets that the premium will shrink—perhaps because market conditions improve, crop expectations improve, and the compensation for carry is no longer needed. Conversely, a long new-crop / short old-crop trade (buying the spread) bets that the premium will widen as supply concerns mount or as time passes and carry costs accumulate.

These trades are popular because they isolate the carry-cost and structural components of pricing from outright directional market moves. A trader who is neutral on the absolute direction of corn prices but bullish on storage economics might buy the spread, expecting it to widen to full carry by spring.

The international grain market

Outside the U.S., grain spreads operate similarly. In wheat, the Canadian and European crop years differ, creating calendar spreads between futures on the Chicago Board of Trade, Euronext (Paris), and other exchanges. In soybeans, Brazilian new-crop futures (initially quoted in dollars but settling in reais) may trade at large premiums or discounts to U.S. old-crop depending on relative supply timing.

The Brazilian soybean harvest (late April through June) is countercyclical to U.S. timing, creating interesting arbitrage opportunities. A trader might short U.S. old-crop soybeans as Brazilian supply comes on, betting the U.S. spread will compress because the market will have access to cheaper Brazilian supply. These strategies are common among large international commodity houses.

Limits and nuance

The spread assumes normal market function and adequate storage capacity. During supply crises (major crop failures, export bans), physical availability constraints can cause backwardation so severe that the spread inverts and stays inverted for months. Additionally, the spread varies by storage location; a bushel stored in a country elevator in the Midwest carries different costs than a bushel stored in a port facility.

Market manipulation and speculation can also distort spreads. If large traders accumulate old-crop futures, they can artificially widen the spread by creating apparent supply tightness; regulatory bodies monitor this but cannot eliminate it entirely.

Finally, the spread does not account for quality deterioration. Corn stored for a full year in marginal conditions may experience increased insect damage or moisture loss that reduces its ultimate value—a cost not captured in the mechanical spread equation.

See also