Commodity Contract Specifications

A futures contract on wheat specifies protein content, moisture, test weight, and approved delivery locations. These details are not bureaucratic. They make the contract real—transforming it from an abstract bet into a hedge for actual farmers.

What goes into a specification

The exchange publishes a detailed contract specification for each commodity futures. A typical specification includes:

1. The underlying commodity and grade. Contract defines exactly what product is deliverable:

• Wheat: a specific class (hard red winter, soft white, durum) with defined protein (11-14%), test weight (60 lbs/bushel), and moisture limits.
• Crude oil: WTI crude, gravity between 37 and 42 degrees API, sulfur under 0.5%, delivered at specific Cushing, Oklahoma pipeline terminals.
• Gold: refined to 99.5% purity, delivered in bars of 100 troy ounces.

2. Contract size. The standardized amount:

• Wheat: 5,000 bushels per contract.
• Crude oil: 1,000 barrels.
• Copper: 25,000 pounds.

This is chosen to match typical commercial transactions. A grain elevator hedges 5,000-bushel segments; a refinery hedges 1,000-barrel increments.

3. Deliverable grades and locations. If the contract permits multiple grades, the specification defines approved products and adjustment factors:

• Corn futures permit “contract grade” (no foreign material, max 14.5% moisture, 98% starch) and may allow higher protein at a premium.
• Soybeans may permit certified organic soybeans at a 30-cent premium.
• Crude oil permits specific gravity ranges (37-42 API) with sliding adjustments; sour crude is cheaper than sweet crude.

For location, the specification lists approved warehouses, elevator, or pipeline delivery points:

• Soybean futures deliver at approved elevators in Iowa, Illinois, and Indiana.
• Copper futures deliver at approved depositories (LME-registered vaults).
• WTI crude oil delivers at Cushing, Oklahoma pipeline hubs.

Delivery location matters because storage and transportation costs vary. A farmer in Iowa faces different costs delivering soybeans to an Illinois elevator vs. a warehouse 100 miles away.

4. Delivery timing. The contract month, notice period, and delivery window:

• Agricultural commodities: often one contract month (July wheat, September corn), with delivery throughout the contract month.
• Metals and energy: multiple contract months (Jan, Feb, Mar, etc.) with defined notice periods (short side must notify clearing house 2-5 days before intent to deliver).
• Financial futures: often quarterly (March, June, September, December).

5. Contract multiplier. The amount of currency per point move:

• Gold: $100 per point (so a 1-point move = $100 profit/loss per contract).
• Crude: $1,000 per point.
• Natural gas: $10,000 per point.

This determines the leverage and margin requirement.

6. Minimum price fluctuation (tick size). The smallest allowable price move:

• Crude oil: $0.01 per barrel ($10 per contract).
• Gold: $0.10 per troy ounce ($10 per contract).
• Natural gas: $0.001 per million BTU ($10 per contract).

Tick size is set by the exchange and reflects desired precision and liquidity.

Deliverable vs. non-deliverable grades

Most commodity futures permit a range of deliverable grades, not just one. This flexibility is intentional: it allows actual producers to deliver what they actually have without forced downgrades.

But the range is bounded. An extremely low-quality product (moldy grain, heavily contaminated metal, sour crude above the contract limit) cannot be delivered. This forces a disconnect between futures and spot for off-spec material. If the spot market is flooded with low-quality soybeans, futures prices will rise (good quality is in demand) while spot prices for low-quality collapse. Producers with off-spec inventory cannot deliver into futures, creating basis risk.

Some exchanges address this with adjustment factors. A slightly higher protein wheat might deliver at a 2-cent-per-bushel premium; a slightly lower protein at a 2-cent discount. This makes the contract more flexible while preserving quality bounds.

Why specifications matter

Specifications do three critical things:

1. They anchor the contract to reality. A contract specifying delivery of actual wheat at actual warehouses is a real hedge for a farmer. A contract with vague specifications (or no physical delivery option) becomes pure speculation.

2. They determine the basis. The difference between spot and futures price depends on the grade, location, and delivery mechanics. A farmer in North Dakota faces a different basis for soybeans than a farmer in Louisiana because transportation costs differ. The specification determines which locations are acceptable and thus which basis relationships are valid.

3. They protect quality and market integrity. A wheat futures contract that permitted any grain to be delivered would collapse: speculators could dump low-quality grain on longs, and the contract would become unreliable as a hedge. Tight specifications keep the instrument honest.

Changes to specifications and their impact

Exchanges occasionally revise specifications (change allowed grade ranges, add or remove delivery locations, adjust multipliers). These changes can have major effects:

London Metals Exchange (LME) tin contract: In 2021, the LME expanded the list of approved depositories and changed financing costs rules, triggering dramatic price dislocations as market participants recalibrated basis relationships.

WTI crude oil: The introduction of crude oil exports from the US in 2016 created discussions about whether crude from Alaska or the Gulf could deliver into WTI futures (which had always been sourced from inland Cushing). The answer shaped the market structure for a decade.

Agricultural contracts: Changes to organic certification rules or GMO definitions can shift which soybeans are deliverable as “certified organic” or “non-GMO,” affecting the premium these products command relative to conventional futures.

Major traders monitor specification changes closely because they alter the economics of hedging and basis trades.

Specification gaming and quality deterioration

Some argue that loose specifications allow “specification gaming”: delivery of technically compliant but poor-quality goods that do not serve real hedgers.

Example: A corn futures contract specifies protein, moisture, and foreign material limits but not the source or handling. A trader could theoretically deliver field corn that is technically within spec but has been stored in suboptimal conditions, harboring mold that is not visible in the test. The contract was met, but the user got degraded corn.

Exchanges and industry groups push back against loose specs, but tension always exists: tighter specs mean fewer delivery options (higher hedging costs), while looser specs create quality degradation.

Regional and customized specifications

Different regions have different standards:

• CBOT (Chicago) wheat futures: Reflect Midwest wheat quality standards.
• Kansas City wheat futures: Different specification reflecting Great Plains wheat.
• KCBT corn futures: Separate from CBOT corn, with slightly different moisture/protein specs.

Producers in each region hedge with the local futures contract most closely matching their actual harvest. This allows each contract to remain relevant to real producers while accommodating regional variation.

Some OTC forwards are even more customized: a large processor might negotiate a forward contract specifying exact moisture, protein, variety, and delivery date tailored to their milling process. Standardized futures cannot match this precision but offer liquidity and low cost in return.