Forwards and Futures Look Identical Until Someone Has to Post Collateral
Both lock in a price today for a transaction later. One settles once at the end. The other settles every single day, and that changes who can survive it.
The Shared Idea
Both instruments do the same thing. Two parties agree today on a price at which an asset will be exchanged on a future date. A farmer locks in a price for a harvest. An airline locks in a price for fuel. Neither wants to discover the price when the time arrives.
The payoff at maturity is the same for both. What differs is everything that happens between now and then.
The Forward
A forward contract is a private agreement between two parties, usually arranged through a bank. The terms are whatever the two sides negotiate: any quantity, any date, any asset.
No money moves until maturity. At that point the contract settles, either by delivering the asset or by paying the difference between the agreed price and the market price.
The flexibility is the appeal. A company needing exactly 3.7 million euros on the fifteenth of a specific month can have precisely that. The cost is that the entire gain sits as an unsecured claim on the counterparty for the whole life of the contract.
The Future
A futures contract is standardised and trades on an exchange. Fixed contract sizes, fixed delivery months, fixed specifications. A crude oil contract is 1,000 barrels of a defined grade at a defined location, and every one is identical.
Both parties post initial margin, a good faith deposit. Each day the contract is marked to market: the exchange calculates the change in value and moves cash between the accounts. Gains are credited daily and losses are debited daily.
A future is a forward that gets torn up and rewritten at the closing price every day, with the difference settled in cash. The final payoff is the same. The path to it is entirely different.
Why Daily Settlement Changes the Risk
Under a forward, a loss accumulates invisibly until maturity, when a large payment falls due from a counterparty that may no longer be able to make it.
Under a future, the same loss is collected in daily instalments. If the loser cannot pay, the position is closed the following morning while the loss is still one day in size. The clearing house stands between every buyer and seller, so no participant is exposed to any other participant's failure.
This is the structural advantage, and it explains why futures markets kept functioning through 2008 while over the counter markets seized.
| Forward | Future | |
|---|---|---|
| Terms | Fully customisable | Standardised |
| Cash flows | One, at maturity | Daily margin |
| Credit risk | The counterparty | Clearing house |
| Exit | Negotiate or offset | Sell on the exchange |
The Cost of Daily Margin
Daily settlement removes credit risk and introduces liquidity risk. A hedger whose position moves against them must produce cash immediately, even if the thing being hedged has gained an exactly offsetting amount that will not be realised for months.
Metallgesellschaft is the standing example. Its hedging positions generated enormous margin calls while the offsetting exposure sat in long term supply contracts producing no cash. The hedge was arguably sound. The financing of it was not, and the firm nearly failed over a timing mismatch.
The Small Pricing Difference
Because futures gains are received daily, they can be reinvested, and losses have to be funded immediately. That interaction with interest rates means futures and forward prices on the same asset are not exactly identical. If rates are correlated with the asset price, futures carry a slight advantage or disadvantage relative to forwards.
The gap is small and matters mainly for interest rate products, where the correlation is direct and the resulting adjustment is a standard part of the pricing.
The Bottom Line
Forwards are customisable, private, and settle once, which suits a company hedging a specific exposure and comfortable with the counterparty. Futures are standardised, exchange traded, and settle daily, which removes credit risk and replaces it with a demand for cash on the exchange's schedule rather than yours. Choosing between them is choosing which risk you would rather manage.