How Hedging With Futures Works | How Do Futures Work?

Hedging with futures means taking a futures position that gains when your real-world business loses, so the two roughly cancel out and you end up close to a price you chose in advance. A farmer who will sell corn in the fall sells corn futures now; a company that will buy fuel later buys fuel futures now.

In short: A hedge swaps price risk for a smaller, different risk called basis risk. A short hedge (selling futures) protects someone who owns or will produce a commodity against falling prices. A long hedge (buying futures) protects someone who will need to buy against rising prices. The futures gain or loss offsets the change in the cash price, so the hedger gives up the upside in exchange for protection from the downside. The hedge is rarely perfect, because the local cash price and the futures price do not move exactly together.

The misconception: hedging is not “betting less”

People sometimes describe hedging as a cautious form of speculation. It is closer to the opposite. A speculator starts with no exposure and takes some on. A hedger starts with an exposure they already have (a crop in the ground, a fuel bill next quarter, a stock portfolio) and uses futures to reduce it.

That difference matters when you judge results. A hedger who loses money on futures has not necessarily made a mistake. If prices rose and the hedger was short futures, the futures lost, but the crop they were protecting became worth more. The question is whether the combined position (cash plus futures) landed where the hedger planned.

If you are new to how the contracts themselves work, start with what a futures contract is.

The two basic hedges

	Short hedge	Long hedge
Who uses it	Producers and holders of inventory	Buyers and processors
Exposure	Loses if prices fall	Loses if prices rise
Futures position	Sell futures	Buy futures
Examples	Corn grower, oil producer, grain elevator with stocks	Airline, feed lot, cereal maker, refiner buying crude

In both cases the hedger normally does not deliver or receive through the futures contract. They buy or sell the physical product in their usual local market, and close the futures position (by making the opposite trade) at about the same time. The futures position is a financial offset, not the actual supply chain.

Basis: the part a hedge cannot remove

Basis is the difference between the local cash price and the futures price:

Basis = local cash price minus futures price

A corn elevator in central Illinois might bid 30 cents under the December futures price at harvest. That basis reflects transport costs to the delivery points, local supply and demand, storage, and quality. The concept is covered in more depth in the basis glossary entry.

A hedge locks in the futures price. It does not lock in the basis. So what a hedger really locks in is:

Expected net price = futures price when hedge is placed + expected basis at the time of sale

If the basis at sale turns out different from what was expected, the result moves by that difference. That is basis risk, and it is why hedges are approximate.

Worked example 1: a corn grower’s short hedge

The specs here are the real CBOT corn contract: 5,000 bushels per contract, minimum tick of 1/4 cent per bushel, worth $12.50 per contract. The prices are illustrative only.

In spring: A grower expects to harvest and sell 50,000 bushels in the fall. December corn futures trade at $4.60 per bushel. Based on past years, the grower expects the local harvest basis to be about -$0.30. Expected net price: $4.60 + (-$0.30) = $4.30 per bushel.

The grower sells 10 December contracts (10 x 5,000 = 50,000 bushels).

Scenario A: prices fall

At harvest, December futures are $4.10 and the local cash bid is $3.75, so the basis came in at -$0.35, a nickel weaker than expected.

	Calculation	Result
Cash sale	50,000 bu x $3.75	$187,500
Futures gain	($4.60 - $4.10) x 50,000 bu	+$25,000
Total		$212,500
Net price per bushel	$212,500 / 50,000	$4.25

Check the futures gain in ticks: a 50-cent move is 200 ticks (0.50 / 0.0025), and 200 x $12.50 = $2,500 per contract, times 10 contracts = $25,000.

The grower aimed for $4.30 and got $4.25. The 5-cent shortfall is exactly the basis surprise: -$0.05 x 50,000 = -$2,500.

Scenario B: prices rise

At harvest, December futures are $5.20 and the cash bid is $4.85 (basis again -$0.35).

	Calculation	Result
Cash sale	50,000 bu x $4.85	$242,500
Futures loss	($5.20 - $4.60) x 50,000 bu	-$30,000
Total		$212,500
Net price per bushel		$4.25

Same net price. An unhedged neighbour would have earned $4.85 and done better. That is the trade-off of a hedge: it removes the bad outcome and the good one.

The cash flow problem hidden in Scenario B

Futures are marked to market every day. As corn rose from $4.60 to $5.20, the grower’s short position lost $0.60 x 5,000 = $3,000 per contract, or $30,000 across 10 contracts, and that money had to be paid into the account as variation margin before the crop was harvested and sold. The higher crop value arrives months later. A hedger needs cash or a credit line to carry the margin through a rally. How this works day to day is covered in how futures margin works.

Long hedges in brief

A long hedge is the mirror image. A food maker that will buy soybean oil in three months buys soybean oil futures today. If prices rise, the futures gain offsets the higher purchase price. If prices fall, the futures loss offsets the cheaper purchase. Either way, the buyer ends up near the futures price at the start, plus or minus the basis change. A fuller worked example for a jet fuel buyer is in how farmers and airlines hedge.

The hedge ratio: how many contracts?

The simplest hedge matches quantities one for one: 50,000 bushels of corn, 10 contracts of 5,000 bushels. That works well when the thing you hold is the same thing the futures contract is based on.

Often it is not. An airline buys jet fuel, but the most liquid contract is diesel (NY Harbor ULSD). A portfolio manager holds a basket of stocks that is not the S&P 500. In these cross-hedges, the hedge ratio adjusts the number of contracts for how much the exposure tends to move relative to the futures.

A common textbook version is the minimum-variance hedge ratio:

Hedge ratio = correlation x (volatility of cash price changes / volatility of futures price changes)

If cash prices move 1.2 times as much as futures and the two are highly correlated, you need more than one unit of futures per unit of exposure. These ratios are estimated from history, and history can change.

Worked example 2: hedging a stock portfolio with E-mini futures

This example uses the real E-mini S&P 500 contract, worth $50 times the index level, with a tick of 0.25 index points ($12.50). Index level and portfolio are illustrative.

A fund manager holds a $5,000,000 stock portfolio with a beta of 1.2 (it has historically moved about 1.2 times as much as the S&P 500). The manager wants to reduce market exposure for a few weeks without selling the stocks.

Index level: 6,000
Notional value of one E-mini contract: 6,000 x $50 = $300,000
Contracts needed: 1.2 x $5,000,000 / $300,000 = 20 contracts (sold)

Now suppose the index falls 10%, to 5,400.

	Calculation	Result
Expected portfolio change	-10% x 1.2 x $5,000,000	-$600,000
Futures gain	600 points x $50 x 20	+$600,000
Net		about $0

In ticks: 600 points is 2,400 ticks, times $12.50 = $30,000 per contract, times 20 = $600,000.

In practice the net will not be exactly zero. The portfolio’s beta is an estimate, individual stocks do their own thing, and futures prices include a small cost-of-carry difference from the index. The mechanics of index futures pricing are in stock index futures explained.

What can go wrong

Basis risk. As shown above, the local price can drift away from the futures price. For cross-hedges, the gap can be large. Jet fuel and diesel usually move together, but not always.

Quantity risk. A grower who hedges 50,000 bushels and harvests 35,000 because of drought is now short 15,000 bushels of futures with no crop behind them. That part is speculation. This is why many producers hedge only part of expected output.

Margin and liquidity. A correct hedge can still drain cash in the short run through daily margin calls. Firms have failed not because the hedge was wrong but because they could not fund it. The Metallgesellschaft case in famous futures blowups is the classic example.

Rolling. A hedge that runs longer than the available liquid contracts must be rolled from one month to the next. Each roll can gain or lose depending on the shape of the futures curve.

Over-hedging. Hedging more than your real exposure turns protection into a speculative position. Regulators and exchanges treat bona fide hedging differently from speculation for position limits, so the distinction also matters legally.

Accounting and tax. Hedge results may be reported differently from the underlying business. In the US and Canada, the tax treatment of hedging transactions can differ from that of speculative futures trades. Check with a professional adviser.

The short version

A futures hedge pairs a real-world exposure with an opposite futures position, so gains on one side offset losses on the other. Producers sell futures (a short hedge) and buyers buy futures (a long hedge). The hedge locks in the futures price, not the local cash price, so the final result depends on the basis, which can move. The number of contracts comes from matching quantities, adjusted by a hedge ratio when the exposure is not identical to the futures contract. A hedge gives up upside in exchange for protection, and it can demand margin cash before the business side pays off.