Futures Margin Explained: Initial, Maintenance and Day-Trade Margin

Margin is one of the most misunderstood ideas in futures trading. It is not a down payment and it is not a loan. Understanding what it is, and what it isn't, helps you avoid the account-ending mistake of sizing a trade by what your margin allows.

What margin is

In futures, margin is a good-faith deposit (sometimes called a performance bond) that you post with your broker to open and hold a position. It is set aside to cover potential losses. Unlike buying stock on margin, you are not borrowing money to pay for the asset, and you don't own an asset at the end.

Initial vs. maintenance margin

Exchanges set minimum margins for each contract, and brokers can require more. Both change, often rising in volatile markets. Always read the current numbers from your broker rather than relying on an article, including this one.

Daily settlement: gains and losses are real every day

Futures accounts are marked to market each day. Gains are added to your balance and losses are taken out of it at the end of the session. A losing position therefore reduces your balance as it moves against you, even if you haven't closed it.

What a margin call is

If losses push your balance below the maintenance requirement, your broker may issue a margin call, asking you to deposit more funds. Many brokers also have the right to close your positions without notice, at whatever price the market offers, to bring the account back in line. In fast markets that can lock in a loss larger than you expected.

A hypothetical illustration

Hypothetical numbers only. Suppose a contract requires $1,000 of margin and you hold $3,000 in the account. Margin permits you to open several contracts, but if each contract can lose $500 on a modest move, three contracts could lose $1,500 quickly. The margin requirement told you the minimum to hold the position, not how much risk is sensible.

Why margin should never set your size

• Margin is the minimum to hold a trade, not a measure of how much you can lose on it
• Losses can exceed your initial deposit
• Requirements can change quickly, leaving an oversized position under-margined
• Your stop distance and risk limit, not margin, should decide contract count

Work out size from your risk per trade and stop distance instead: see futures risk management and the tick value chart.

Why micros help

Micro contracts are one-tenth the size of their standard versions and generally need a smaller margin deposit. That makes it easier to size positions precisely. It does not make losses impossible. See MNQ vs NQ.

Questions to ask your broker

• What are the current initial, maintenance and day-trade margins for the contracts I trade?
• When does day-trade margin switch to overnight margin?
• How and when will you notify me of a margin call?
• Under what conditions will you liquidate positions without notice?
• How quickly can margin requirements change?

This article is for educational and informational purposes only and is not financial, investment or trading advice. Futures trading involves substantial risk of loss. Hypothetical examples are illustrative and do not represent actual trades or results. Full disclaimer.