What Are Futures Contracts? Definition, Specs, and Real Examples

Most explanations of futures start with how to trade them. This one starts earlier – with what a futures contract actually is: its legal structure, the specifications that define it, and how those specifications translate into real dollar risk.

Understanding the contract itself is the prerequisite to understanding everything that comes after.

The definition – In plain terms

A futures contract is a standardized, legally binding agreement between two parties to buy or sell a specific asset at a predetermined price on a set date in the future.

Three words in that definition carry most of the weight:

Standardized. Unlike a private agreement negotiated between two companies, a futures contract is defined entirely by the exchange that lists it. The CME Group sets the contract size, tick size, expiration date, and settlement method. Neither the buyer nor the seller negotiates these terms – they simply agree to trade under the exchange's specifications.

Legally binding. Both parties – buyer and seller – are obligated to fulfill the contract at expiration. This distinguishes futures from options, where only the seller is obligated and the buyer has a choice.

Predetermined price. The price is agreed upon at the time the contract is entered, not at delivery. This is the entire point: price certainty for a future transaction.

In practice, most retail traders close their positions before expiration. The obligation to buy or sell the underlying asset is real – but it only matters if the contract is held to its end date.

The anatomy of a futures contract

Every futures contract on the CME Group publishes a specification page that defines the contract's terms completely. Before trading any contract, these specs must be understood. They are not fine print – they determine exactly how much money you gain or lose per price move.

1. Underlying asset

The asset the contract is based on. This can be a physical commodity (crude oil, gold, corn), a financial instrument (S&P 500 index, 10-Year Treasury Note), a currency (EUR/USD), or a cryptocurrency (Bitcoin).

The underlying asset determines which exchange lists the contract, what drives its price, and what the settlement process looks like.

2. Contract size

The quantity of the underlying asset represented by one contract. This is fixed by the exchange and cannot be modified.

Examples:

• One CL (Crude Oil) contract = 1,000 barrels of WTI crude oil
• One GC (Gold) contract = 100 troy ounces of gold
• One ES (E-mini S&P 500) contract = $50 × the S&P 500 index level
• One MES (Micro E-mini S&P 500) contract = $5 × the S&P 500 index level

Contract size determines the notional value of your position. If the S&P 500 is at 5,400 and you hold one ES contract, your notional exposure is 5,400 × $50 = $270,000. One MES contract at the same level is $5 × 5,400 = $27,000 – one-tenth the exposure.

3. Tick size and tick value

A tick is the minimum price increment a contract can move. The tick value is the dollar amount that one tick represents per contract.

These two numbers define the profit and loss granularity of every trade.

Tick value = Contract size × Tick size

The tick value is the number every trader must know before entering a position. If you hold five ES contracts and the market moves 10 points against you, that is 40 ticks × $12.50 × 5 contracts = $2,500 loss in a single move.

4. Expiration date and contract month codes

Every futures contract has a fixed expiration date. Most equity index and financial futures follow a quarterly cycle: March, June, September, December.

Contract month codes are single letters used in ticker symbols:

So ESM26 = E-mini S&P 500, June 2026. ESU26 = E-mini S&P 500, September 2026.

The nearest-expiration contract (the "front month") is typically the most liquid and carries the tightest bid-ask spreads. Volume migrates to the next contract month approximately one to two weeks before the front month expires – this migration period is called the roll.

5. Settlement method

At expiration, contracts settle one of two ways:

Cash settlement: No physical asset changes hands. The contract is closed at the final settlement price and the net gain or loss is credited or debited to the account. All equity index futures (ES, MES, NQ, MNQ) settle this way. The settlement price is calculated from the actual index value on expiration day.

Physical delivery: The underlying asset actually changes hands. Crude oil (CL), gold (GC), corn, wheat, and other commodity contracts settle with physical delivery. A long holder at expiration receives – and must pay for – the physical commodity. Retail traders must close or roll physical delivery contracts before the "first notice day" to avoid being obligated to take delivery.

Full contract specification summary:

How futures prices are quoted

A futures price quote looks identical to a stock price – a single number representing the current agreed-upon price for that contract. What is different is what that number means in dollar terms.

Example: MES is quoted at 5,412.25. This means:

• One contract controls $5 × 5,412.25 = $27,061.25 in notional value
• To hold this position, you deposit approximately $80 in intraday margin – not $27,061.25
• Every 1-point move in the index = $5.00 per contract
• Every 0.25-point tick = $1.25 per contract

The gap between notional value and margin is what creates leverage. You are not paying for the contract's full value upfront – you are posting a performance bond.

Futures vs. Forward contracts

Futures are often confused with forward contracts. Both involve agreeing on a price today for a future transaction – but the structural differences matter.

A futures contract is essentially a standardized, exchange-guaranteed, publicly tradable version of a forward contract. The exchange acts as the central counterparty – guaranteeing both sides – which eliminates the counterparty default risk inherent in forward agreements.

Futures vs. Options: One key difference

Both futures and options are derivatives – instruments whose value is derived from an underlying asset. The critical difference is obligation vs. right.

A futures contract is an obligation. If you hold a long futures position to expiration, you are required to buy the underlying asset (or receive cash settlement) at the contracted price – regardless of whether the current market price is favorable.

An options contract gives the buyer a right but not an obligation. An options buyer can choose not to exercise. Their maximum loss is limited to the premium paid.

This distinction defines the risk profile of each instrument. Futures traders have theoretically unlimited downside without a stop-loss. Options buyers have defined maximum loss from the moment they enter.

Real example: One futures contract, start to finish

Contract: MES (Micro E-mini S&P 500)
Entry: Buy 1 MES at 5,400 on Monday morning
Margin deposited: $80
Notional value: $27,000

Monday close: Market settles at 5,410 → +10 points = +$50 credited to account (mark-to-market)

Tuesday close: Market settles at 5,395 → −15 points = −$75 debited from account

Wednesday: Trader closes position at 5,405

Net result:

• Entry: 5,400
• Exit: 5,405
• Gain: +5 points = +$25
• Total tick movement: 5 points × $5.00/point = $25

The daily mark-to-market means gains and losses are not deferred – they settle to cash each evening. On Wednesday, the trader's account reflects the $25 net gain plus the return of the original $80 margin deposit.

Why standardization matters

The single feature that makes modern futures markets possible – and that distinguishes them from private agreements – is standardization.

Because every MES contract is identical, a trader who buys from one counterparty can sell to an entirely different counterparty five minutes later. There is no need to renegotiate terms, find the original seller, or transfer a customized contract. The exchange clears both sides automatically.

This standardization creates:

• Liquidity: Millions of identical contracts traded between countless participants
• Price transparency: A single public price reflects all buyers and sellers simultaneously
• Accessibility: Any trader with a brokerage account can participate on equal terms with institutional players

Without standardization, the futures market as it functions today – with trillions of dollars in daily volume – would not exist.

Frequently asked questions

1. What is the difference between a futures contract and a stock? A stock represents ownership in a company. A futures contract is a price agreement on an underlying asset – with no ownership of anything. Futures expire; stocks do not. Futures carry built-in leverage through the margin system; stocks do not.
2. Can a retail trader hold a futures contract to expiration? Technically yes, but it is rarely advisable. Cash-settled contracts (ES, MES, NQ) settle automatically. Physically settled contracts (CL, GC) require the trader to take or make delivery of the underlying commodity – an outcome no retail trader wants. Most retail traders close positions days or weeks before expiration.
3. What does "rolling" a futures contract mean? Rolling means closing the current (expiring) contract and opening a new position in the next active contract month. This maintains continuous market exposure without going through settlement. Roll dates are published by the CME and tracked by most trading platforms.
4. How many futures contracts should a beginner trade? One. Starting with a single micro contract (MES or MNQ) limits maximum risk to approximately $1.25–$5.00 per tick while the mechanics of contract specifications, margin, and expiration are being learned in a live environment.
5. Where can I find the contract specifications for any futures contract? The CME Group publishes complete contract specification pages at cmegroup.com for every listed contract. These pages include contract size, tick size, tick value, trading hours, margin requirements, and settlement details.

Conclusion

A futures contract is defined entirely by its specifications: the underlying asset, contract size, tick value, expiration date, and settlement method. These terms are set by the exchange, not negotiated – which is what makes futures liquid, transparent, and accessible.

Before trading any futures contract, reading its specification page is not optional. The numbers on that page determine exactly how much money changes hands with every tick.