What you will learn
- Explain what futures margin is and how it differs from stock margin
- Compute leverage from the contract value and margin
- Understand initial margin, maintenance margin, and margin calls
- See why leverage demands disciplined position sizing
Returning from options to futures, this lesson looks at the feature that most defines their character and their danger: leverage, made possible through margin. Leverage lets a small amount of capital control a large position, and it is both the source of futures' appeal and the reason they can destroy an account very quickly. You need to understand margin and leverage to use futures responsibly.
Understanding futures margin (Charles Schwab)
Explains what futures margin is and how it works. Focus on margin as a performance bond, not a loan.
What margin means for futures
To open a futures position, a trader posts margin, a deposit required by the exchange. Crucially, this is not a down payment or partial ownership, as margin is for stocks, where it is a loan to buy shares. Futures margin is a good-faith deposit, a performance bond, guaranteeing the trader can cover potential losses. It is only a fraction of the contract's total value, and because it is only a fraction, the trader controls a position far larger than the capital they put up.
Key terms
- Futures margin
- A good-faith deposit (performance bond) that is a fraction of the contract value, not a loan.
- Initial margin
- The deposit required to open a futures position.
- Maintenance margin
- A lower threshold the account must stay above, falling below triggers a margin call.
- Notional value
- The full value of the underlying the contract controls.
How leverage works
Because margin is only a small fraction of the contract's value, futures embody substantial leverage. Leverage is simply the notional value of the contract divided by the margin you post. If the margin is 10 percent of the contract value, you control a position ten times your deposit, ten-to-one leverage. Price moves in the underlying are then magnified relative to your capital: a 1 percent move becomes roughly a 10 percent gain or loss on the margin posted.
- notional value = full value of the contract
- margin posted = the deposit you put up
Leverage and its magnification
A futures contract has a notional value of 50,000 dollars, and the required margin is 5,000 dollars. What is the leverage, and what is your return on margin if the underlying rises 2 percent?
- Leverage. Notional over margin is 50,000 / 5,000, which is 10 times.
- Gain on the notional. 2 percent of 50,000 is 1,000 dollars.
- Return on margin. 1,000 gain over the 5,000 margin is 20 percent.
Why it matters: The 2 percent move was magnified tenfold into 20 percent on your capital. A 2 percent move against you would lose 20 percent just as fast, and a 10 percent adverse move would wipe out the entire margin.
Compute futures leverage
A futures contract has a notional value of 120,000 dollars, and the required margin is 6,000 dollars. What is the leverage ratio?
Initial and maintenance margin
Margin comes in two forms. Initial margin is required to open the position. Maintenance margin is a lower threshold the account must stay above while the position is held. Because futures are marked to market daily, gains and losses settle each day. If losses push the account below the maintenance margin, the trader gets a margin call, a demand to deposit more funds. Failing to meet it means the position is liquidated to prevent further losses. This protects the clearinghouse but can force traders out at the worst possible moment.
Leverage is a magnifying glass on both profit and loss. With futures, a modest move in the underlying can multiply into a fortune or a wipeout on the capital you posted.
Understanding futures margins (EdgeClear)
A short, practical look at initial and maintenance margin and margin calls. Reinforces the mechanics.
The double-edged sword and the discipline it demands
The central truth about leverage, connecting back to debt and risk in earlier units, is that it magnifies gains and losses in equal measure. The same leverage that turns a small favorable move into an outsized profit turns a small adverse move into a devastating loss. Worse, with futures you can lose more than your initial margin, because losses are tied to the full contract value, not just the capital you posted. A sharp move against a leveraged position can wipe out the margin and leave you owing more, and the daily mark-to-market and margin-call mechanism can force liquidation before any recovery. This is exactly how many traders blow up: not because they were wrong in the long run, but because leverage turned a temporary adverse move into a fatal loss. The remedy is the position-sizing discipline from Unit 6: size a leveraged position so even a large adverse move cannot destroy the account.
The margin call
You hold a heavily leveraged futures position. The underlying moves against you overnight, and your account falls below the maintenance margin. What happens, and why is this dangerous?
Falling below the maintenance margin triggers a margin call for more funds. If you cannot meet it, the position is liquidated to protect the clearinghouse. The danger is that leverage plus daily mark-to-market can force you out of the position at the worst possible time, turning a temporary adverse move into a locked-in loss.Respecting leverage
In your own words, explain why high leverage makes prudent position sizing essential for a futures trader.
Write an answer before comparing it with the model response.
Model answer
Leverage multiplies both gains and losses by the same factor, so at ten-to-one leverage a small adverse move in the underlying becomes a ten-times-larger loss on my posted capital, and it is even possible to lose more than my initial margin because losses are tied to the full contract value. On top of that, daily mark-to-market and margin calls can force my position to be liquidated during a temporary adverse move, before any recovery. That means being right about direction in the long run is not enough, a large short-term swing can wipe me out first. So I have to size the position small enough that even a big adverse move does not breach my margin or destroy my account, applying the risk-of-ruin and position-sizing discipline from the risk-management unit. Using maximum leverage for maximum gain is a direct path to a catastrophic, unrecoverable loss.
Leverage is the defining power and danger of futures. The next lesson turns derivatives toward their most constructive use: hedging a portfolio's risk.