What it means
Exchanges exist because raw materials are difficult to trade privately at scale. Before organised exchanges, a farmer and a miller had to find each other, agree quality, agree delivery and each carry the risk that the other would not perform.
An exchange replaces all of that with standardised contracts and a clearing house that stands between both sides. Standardisation is the mechanism that makes it work.
A contract specifies the exact quantity, quality grade, delivery month and delivery location, so the only thing left to negotiate is price. That is why a corn contract is always 5,000 bushels and a crude oil contract is always 1,000 barrels: everyone is trading precisely the same thing.
Two different groups use these markets for opposite reasons. Hedgers, such as farmers, airlines, food manufacturers and mining companies, use futures to lock in a price and remove uncertainty from their planning.
Speculators take the other side, accepting price risk in the hope of profit, and in doing so they provide the liquidity that lets hedgers trade at all. Trading is done on margin, meaning a participant posts a good-faith deposit of typically 5% to 12% of contract value rather than the full amount.
Positions are marked to market daily, so gains and losses move in and out of the margin account each day and a losing position triggers a margin call. This daily settlement is what keeps the clearing house safe.
The nuance most business people miss is that hedging does not make you money; it makes your outcome predictable. A hedger who locks in a price and then watches the market move favourably has lost the upside, and the correct response is not regret but recognition that the certainty was the product being purchased.
In practice
Real-world examples.
Example
A national bakery buys wheat futures each January to fix its flour input cost for the year ahead, allowing it to publish a stable price list to supermarket customers. When wheat spikes 30% in the spring, its margins hold while unhedged competitors raise prices.
Example
A copper miner sells futures against six months of expected production to secure the price used in its bank covenant forecasts. The lender treats the hedged revenue as far more reliable than spot-price projections.
Example
A regional airline hedges 60% of its next twelve months of jet fuel through exchange-traded contracts, deliberately leaving 40% floating so it captures some benefit if oil prices fall.
Formula
Calculation
Contract Value = Contract Size x Price per Unit
Hedge Result = Cash Market Proceeds + Futures Gain or Loss
A grain farmer expects to harvest 100,000 bushels of corn. Corn futures trade in contracts of 5,000 bushels.
Contracts required = 100,000 / 5,000 = 20 contracts
In May, with the December contract at $4.60 a bushel, the farmer sells 20 December contracts to fix a price. By harvest, a strong crop has pushed the cash price down to $4.10 a bushel and the futures price has followed.
Cash sale = 100,000 x $4.10 = $410,000
Futures gain = ($4.60 - $4.10) x 100,000 = $0.50 x 100,000 = $50,000
Total proceeds = $410,000 + $50,000 = $460,000
Effective price received = $460,000 / 100,000 = $4.60 a bushel
The hedge delivered exactly the price locked in back in May. Had the cash price instead risen to $5.10, the futures leg would have lost $50,000 and the effective price would still have been $4.60.Case study
Seen in the real world.
Bramfield Grain is an illustrative, fictional family farming business producing about 100,000 bushels of corn a year. For a decade it sold everything at harvest into the cash market, and its income swung with whatever price happened to prevail in October.
After two consecutive poor years, the owners began selling 20 December contracts each May at whatever price covered their full costs plus a target margin. In the first hedged year they locked in $4.60 a bushel; the cash price fell to $4.10, the futures position gained $50,000, and total proceeds came to $460,000 exactly as planned.
The following year the market rallied and the same hedge cost them the upside. The fictional lesson the family drew was that hedging turned a volatile income into a budgetable one, which allowed them to commit to a machinery purchase they would never have risked while their revenue depended on the weather in three continents.
Watch out
Common mistakes.
- Thinking hedging is a way to beat the market. A hedge fixes an outcome, and giving up favourable moves is the cost of removing unfavourable ones.
- Assuming futures always end in physical delivery. The overwhelming majority of contracts are closed out before expiry, with only cash differences settled.
- Underestimating margin requirements. A position that moves against you generates daily margin calls, so a hedger needs available cash even when the underlying business is fine.
Questions
People also ask.
What is the difference between a futures contract and a forward contract?
A futures contract is standardised and traded on an exchange with a clearing house guarantee, while a forward is a private bilateral agreement carrying counterparty risk.
Who guarantees that the other side will pay?
The exchange's clearing house acts as counterparty to both sides and is protected by margin deposits and daily settlement.
Can a small business use a commodities exchange?
Directly it is often impractical because of contract sizes and margin, but many access the same protection through a broker or through fixed-price supply agreements that reference exchange prices.
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