Understanding Futures Contracts
A futures contract is a standardized agreement between a buyer and seller, executed through an organized exchange, to deliver or receive a specific asset at a predetermined price on a future date. Unlike stocks or bonds, futures contracts obligate both parties to settle their positions at contract expiration or close them beforehand by taking an offsetting trade.
The exchange itself acts as the counterparty and guarantees performance. This central clearing mechanism removes counterparty risk—a major advantage over over-the-counter forwards negotiated privately between two parties. Futures exist across commodity markets (oil, agricultural products, metals), financial indices (stock market futures), currencies, and interest rates.
Key specifications define each contract:
- Contract size: The standardized quantity (e.g., 100 barrels of oil, 5,000 bushels of wheat, or a notional value for index futures).
- Tick value: The minimum price movement unit and its dollar equivalent.
- Expiration date: When delivery or cash settlement occurs.
- Trading code: Unique identifier for the contract type and month.
How Daily Settlement and P&L Accrue
Futures exchanges perform daily mark-to-market accounting. At the end of each trading session, your position is repriced at the settlement price. If the price moved in your favor, cash flows into your margin account; if against you, it flows out. This process happens every single day until you close the trade.
The relationship between price movement and your account is direct and mechanical:
- Long position (buyer): You profit when the price rises and lose when it falls.
- Short position (seller): You profit when the price falls and lose when it rises.
This daily settlement is why futures trading requires active margin management. You must maintain a minimum balance (initial margin) or face forced liquidation. Brokers also enforce variation margin calls when losses accumulate significantly.
Profit and Loss Calculation
Your P&L depends on the price change measured in ticks, the dollar value per tick, and the number of contracts held. The formula accounts for both long and short positions.
Point Value (PV) = Tick Value (TV) × Number of Ticks per Point (NTP)
Price Change (points) = Selling Price − Buying Price
P&L (Long) = PV × Price Change × Number of Contracts
P&L (Short) = −1 × P&L (Long)
Tick Value (TV)— The dollar amount that represents one tick (minimum price move).Number of Ticks per Point (NTP)— How many ticks make up one full point in the contract's pricing.Point Value (PV)— Dollar value of a one-point move, calculated as TV × NTP.Price Change— Difference between exit price and entry price, expressed in points.Number of Contracts— How many futures contracts you hold in the position.
Practical Example: E-Mini S&P 500 Futures
The E-Mini S&P 500 contract (code ES) has a tick value of $12.50 and 4 ticks per point, making the point value $50 per point. Suppose you enter a long position at 4,500.00 and exit at 4,512.50 (a 12.5-point gain) on a single contract.
Calculation:
- Point value = $12.50 × 4 = $50
- Price change = 4,512.50 − 4,500.00 = 12.5 points
- P&L = $50 × 12.5 × 1 contract = $625 profit
If you held 5 contracts instead, the profit would be $3,125. Conversely, if you were short and the price rose 12.5 points, you'd lose $3,125 on the same 5-contract position. The direction of the move and whether you're long or short determines the sign of your P&L.
Key Considerations When Trading Futures
Successful futures trading requires awareness of these common pitfalls and operational realities.
- Leverage and Margin Risk — Futures require only a fraction of the contract's notional value as margin. A $50 move on E-Mini S&P 500 represents $250 per contract—on a $10,000 initial margin, a 4% adverse move wipes out 25% of your account. Always position-size conservatively and maintain a buffer above minimum margin requirements.
- Tick Size Matters Across Markets — Different contracts move in different tick increments. Oil futures (WTI crude) tick in $0.01 increments; gold ticks in $0.10. Always verify the exact tick value and point structure for your specific contract before trading, as miscalculation will distort your P&L estimates.
- Expiration and Contract Rollover — As expiration approaches, liquidity migrates to the next month contract. Trading the front month late in its life can trigger slippage on entry and exit. Plan to roll positions to the next expiration well in advance, typically 1–2 weeks before contract expiration.
- Short Positions and Hedge Logic — Hedgers use short futures to protect long cash positions. A farmer holding stored grain goes short grain futures to lock in a price floor. If grain prices fall, futures losses offset lower cash prices—the goal is not profit but price certainty, not profit.