Futures Contract Specifications

Introduction

If What Are Futures? told you why futures exist, the contract specifications tell you exactly what you're trading. Every futures contract comes with a precise rulebook — its "specs" — set by the exchange: what the underlying is, how much of it one contract controls, the smallest price step, when it expires, and how it settles.

These details are not fine print. They determine how much money you make or lose on each price tick, how much margin you must post, and whether you could end up with a lorry-load of physical commodity at expiry. A trader who doesn't read the specs is flying blind. This article shows you how to read them and why each line matters.

Quick Definition

Contract specifications are the standardised terms that define a futures contract: the underlying asset, the contract size (multiplier), the tick size and tick value, the expiry and delivery months, the trading hours, and the settlement method. Only the price is left for the market to decide.

The Underlying And The Multiplier

Two specs set the scale of your exposure.

The underlying is what the contract tracks — a stock index, a barrel of crude oil, an ounce of gold, a currency pair, an interest rate.

The contract size (or multiplier) says how much of that underlying one contract represents. This is the number that converts an abstract price move into real money:

• Crude oil (CL): one contract = 1,000 barrels. If oil moves $1, the contract's value changes by $1,000.
• E-mini S&P 500 (ES): multiplier = $50 per index point. If the index moves 10 points, the contract changes by $500.

The multiplier is why futures feel so powerful. A single contract can represent tens or hundreds of thousands of pounds of the underlying, even though you post only a small margin to trade it.

Tick Size And Tick Value

Prices don't move in infinitely small steps. The tick size is the smallest increment a contract can move; the tick value is what that increment is worth in money — the atom of your profit and loss.

Tick value = tick size × multiplier

Tick value is the single most practical number in futures trading. It turns a price chart into a pounds-and-pence risk plan: if you know a trade risks 20 ticks to your stop, you know the exact loss per contract, and can size your position accordingly.

Expiry And Contract Months

Unlike a share, a futures contract has a limited life. Each is tied to a delivery month, and several months trade at once (for example, contracts expiring in March, June, September and December). As one contract nears expiry, active traders roll over into the next month to keep their exposure alive — closing the expiring contract and opening the next.

Every contract has a defined last trading day and expiry process. Speculators almost always close or roll before then; they have no wish to actually deliver or receive the underlying. Missing a roll and holding into expiry on a physically-settled contract is a classic beginner's nightmare — which brings us to settlement.

Physical vs Cash Settlement

The settlement method decides what happens at expiry:

• Physical settlement means the underlying actually changes hands — real barrels of oil, real bushels of grain. Producers and users want this; speculators absolutely do not.
• Cash settlement means no delivery: the contract simply settles to a final value, and the difference is paid in cash. Stock-index futures like the E-mini S&P 500 are cash-settled — you could never take delivery of "the index".

Knowing which applies matters enormously. A speculator who forgets to close a physically-settled crude contract could, in theory, be on the hook to take delivery of 1,000 barrels of oil. The full mechanics of daily and final settlement are covered in Futures Settlement.

Mini And Micro Contracts

Full-size futures can be huge — a single contract may control £100,000+ of exposure, too much for most individual accounts to size sensibly. Exchanges solved this by offering scaled-down versions:

• E-mini contracts represent a fraction of the original full-size contract.
• Micro contracts (e.g. the Micro E-mini S&P 500) are a further tenth of the E-mini — one-tenth the size, one-tenth the margin, one-tenth the risk per tick.

These smaller contracts are a gift for risk management. They let a trader take a position sized precisely to their account rather than being forced into an outsized bet by a large multiplier. For anyone learning, micros are the sensible place to start.

A Note For UK Traders: Currency

Most of the world's major futures — index, energy, metals — are priced and settled in US dollars on US exchanges. For a UK-based trader, that means your profit and loss accrues in dollars, so your position carries an extra layer of GBP/USD exchange-rate exposure on top of the futures move itself. A winning trade can be dented (or a losing one softened) by currency movements when converted back to pounds. It's a second variable worth understanding before trading dollar-denominated contracts from a sterling account.

Common Misconceptions

"All futures are the same size." Far from it — multipliers vary wildly, and mini and micro versions exist. Always check the contract size before trading; it defines your true exposure.

"The tick is just a number on the chart." Each tick is real money — its value is fixed by the specs. Ignoring tick value is ignoring your actual risk.

"I'll be forced to take delivery." Only on physically-settled contracts held to expiry. Cash-settled contracts never deliver, and speculators close or roll before expiry regardless.

"Micro and mini contracts are inferior." They're simply smaller. For precise position sizing and learning, they're often the smarter choice, not a lesser one.

Real-World Application

Suppose you want to trade the E-mini S&P 500 (ES) and the index is at 5,000. Read the specs: multiplier $50/point, tick size 0.25, tick value $12.50, cash-settled, quarterly expiries.

That tells you one contract represents 5,000 × $50 = $250,000 of notional exposure. A 40-point move in the index — an ordinary day — is worth 40 × $50 = $2,000 per contract. If you plan to risk no more than $250 on a trade, your stop can be only 20 ticks away (20 × $12.50 = $250), which shapes exactly where you enter and exit. And because you're a UK trader, that $2,000 swing is also a GBP/USD conversion when you bring it home.

Now suppose $250,000 of exposure is simply too large for your account. You switch to the Micro E-mini (MES), one-tenth the size: $5 multiplier, $1.25 tick value, ~$25,000 notional. The same strategy now risks a tenth as much per tick, letting you trade the identical idea at a size you can actually manage. That single decision — reading the specs and choosing the right contract size — is one of the most important a futures trader makes.

Key Takeaways

• Contract specifications define everything about a future except its price: underlying, size, tick, expiry and settlement.
• The multiplier converts a price move into money; the tick value (tick size × multiplier) is the atom of your profit and loss.
• Futures expire; traders roll over to the next contract month to maintain exposure, and close before expiry to avoid delivery.
• Physical settlement delivers the underlying; cash settlement (used by index futures) just pays the difference.
• Mini and micro contracts scale the size down, making precise risk sizing possible — ideal for smaller accounts and learners.
• UK traders of dollar-denominated futures also carry GBP/USD currency exposure on their P&L.