Futures Contracts Explained: Size, Margin, P&L and Expiry

Start with the contract, then interpret the price

A futures quote is incomplete until you know what one contract represents. A move of one price unit may mean a few dollars, many dollars or a fractional quotation that needs another conversion. The product specification supplies the quantity, price increment, settlement terms and relevant dates. Those details let you translate a chart into an exposure you can describe.

CME's contract definition emphasizes standardized terms and exchange trading. Standardization lets participants trade the same defined obligation. It does not mean every futures product has the same size, hours, expiry process or risk. Central clearing changes how counterparty obligations are managed; it does not make a trading loss impossible.

This guide uses hypothetical prices and costs to explain the mechanics. It does not choose a contract, account balance or position for you. If your task is translating instruments between accounts, the existing futures specifications and copying guide covers the additional matching checks.

Read a specification as a set of units

The minimum information needed to interpret a futures position

Field	What it answers	A useful check
Product and venue	Which market and exchange contract is this?	Do not substitute a similarly named CFD.
Contract month	Which dated obligation is open?	Read the full symbol, not only its root.
Contract multiplier	How much money does a full price point represent?	Write the currency and units.
Tick size	What is the permitted minimum price increment?	Check outright versus spread specifications.
Settlement	Does expiry involve a cash calculation or delivery?	Confirm the actual product's rule.
Dates and sessions	When can it trade, and when must an action be completed?	Include broker cutoffs and the time zone.

Contract notional value is the price multiplied by the contract's specified unit or multiplier. It expresses market exposure. Required margin is another number, set through exchange and broker requirements. A proposed stop introduces a third number: a modeled loss if the exit occurs as assumed.

Work through one complete price move

For an educational example, consider two Micro E-mini S&P 500 contracts at a hypothetical price of 5,200.00. CME identifies the MES multiplier as $5 per index point, with an outright tick of 0.25 points. One tick therefore represents $1.25 per contract. These contract dimensions come from the Micro E-mini overview; the price below is invented for arithmetic.

1. Notional exposure: 5,200 × $5 × 2 = $52,000.
2. Price change: an exit at 5,207.50 is 7.50 points above entry.
3. Tick count: 7.50 ÷ 0.25 = 30 ticks.
4. Gross long-position result: 30 × $1.25 × 2 = $75.
5. Illustrative net result: subtract an assumed $6 total in charges to obtain $69.

The same move would be a $75 gross loss for a short position. If the long instead exited 20 points below entry, the gross result would be −$200. The number of ticks and dollar value change with the actual fill price; a desired exit price is not evidence that it was obtained.

CME's profit-and-loss lesson explains the tick-based calculation. You can also calculate a linear contract directly as signed price change × multiplier × quantity. Those are two ways to obtain the same result. Multiplying by the current market price again would count the price dimension twice.

Margin is a condition for carrying exposure

Imagine an unrelated, purely hypothetical broker requirement of $1,000 per contract and an account with $3,000 equity. Two contracts would require $2,000, leaving $1,000 above that requirement before other reservations. A $200 trading loss reduces equity to $2,800. If the requirement remains unchanged, the excess becomes $800. The collateral requirement did not limit the loss to $1,000 or make the position safe.

The example also shows why a broker allowing an order does not establish an appropriate position size. Eligibility, available cash and the loss you are prepared to model answer different questions. Costs, further price movement and increased requirements can erode the remaining buffer. See intraday and overnight futures margin for how a session cutoff can change that calculation without a new trade.

CME distinguishes initial and maintenance margin and explains that brokers can require additional funds. Use current requirements for the exact account. Old educational dollar examples and advertised minimums are poor substitutes for an account-specific check.

Daily settlement changes the cash ledger

A futures position can generate account cash adjustments while it remains open. To see the arithmetic, keep the same two-contract, $5-per-point example and ignore charges. If a carried long position's settlement reference moves from 5,200 to 5,206, the change is +$60. If the next settlement is 5,198, that day's change is −$80. Across the two changes, the total is −$20, matching the two-point decline from the first reference.

You should not add that −$20 again to the already recorded daily adjustments. Reconciliation means checking how the statement presents settled cash, an open position's remaining movement and fees. Intraday entries, exits and quantity changes require their own ledger; the simple carried-position example does not cover every statement convention.

CME describes the distinction between daily and final settlement in its settlement explanation. A chart's last displayed trade is not automatically the exchange settlement price. Record which price each calculation uses before deciding that the broker's result is wrong.

Expiry is part of the position from the beginning

Suppose an account holds one December contract. Selling one March contract in the same product does not simply remove the December exposure. It creates a position across two months. To offset the December position, the transaction must address that same contract and quantity. If the intention is to roll, the operational plan contains both an exit from the old month and an entry into another.

A roll changes the instrument being held. Different contract months can have different prices, liquidity and required margin. A continuous chart may hide the visible transition through an adjustment or stitching method, but the account still contains actual dated contracts. Contango and backwardation explain why prices across months can differ.

CME separates offsetting, rolling and settlement. The deadline for a customer may precede the exchange's last trading time because the broker applies its own delivery policy. Use the settlement guide to build the right date checklist instead of assuming every financial contract settles only in cash.

Test the record, not just the chart

A small demo exercise can establish whether you understand the records for a specific account. Write down the symbol, month, direction, quantity and expected value of one tick. Then compare the submitted instruction, actual execution price, fees and resulting position. An accepted instruction and a filled order are separate events. A limit can remain unfilled, and an intended protective exit can execute differently from its planned price.

Use the same exercise to test your interpretation of a partial close. If two contracts become one, check that the statement identifies the realized part and the remaining open exposure. Do not treat the original two-contract quantity as still active, and do not treat a partial fill as completion of the entire requested size.

When a copier is involved, repeat the inspection for each destination. A shared product name does not verify contract identity, rounding, available margin or permissions. The platform coverage page is a starting point for product questions; actual account and contract support must be confirmed for the chosen connection. Educational contract arithmetic alone cannot establish it.

Keep a contract worksheet you can update

A useful worksheet has a source link and check date for the specification, a separate broker-policy link, the current full symbol and a worked one-tick calculation. Add the trading-session time zone, relevant holiday notice, settlement method and the earliest deadline that affects your account. Keep hypothetical planning numbers separate from observed fills so a later reader can tell what was assumed.

For session scheduling, use the existing futures hours and holiday-check guide. For size comparisons, continue with ES versus MES or NQ versus MNQ. The worksheet should let you explain what changes when the product, quantity or contract month changes, before relying on any automated workflow.