Leverage and Margin: A Plain-English Risk Guide
Live Markets Editorial Team
Updated:
Understand how leverage and margin magnify gains and losses through collateral, funding costs, maintenance rules, liquidation, gaps, and negative balances.
Borrowing increases the exposure behind each dollar of equity
Leverage means controlling an exposure larger than the capital committed, often by borrowing or using a derivative. If $1,000 of equity supports a $2,000 position, a 10% fall in the asset value is a $200 loss before financing and transaction costs—20% of the original equity. The same multiplication works in the other direction, but gains are not assured.
The example assumes a simple position with no offsets, fees, or other assets. Actual derivatives can have nonlinear payoffs, contract-specific settlement, and collateral rules. Notional value alone does not describe the maximum loss or cash that may be required while a position remains open.
Margin terms define when collateral is at risk
Initial margin is the amount required to open a position under the applicable agreement; maintenance margin is a continuing minimum that may trigger additional action if account equity falls. Brokers can set house requirements above regulatory minimums and may change them under the terms they disclose.
If the account falls below a requirement, the firm may demand more funds or liquidate positions, sometimes without waiting for the customer to choose which holding to sell. Exact rights and procedures depend on the product, broker, and agreement. A margin call is not guaranteed to arrive with enough time to arrange a transfer.
Financing costs and gaps alter the result
Borrowed exposure can accrue interest or other financing charges for as long as it is held. Variable rates, fees, currency conversion, and collateral haircuts can change the cost. Include the funding schedule rather than comparing a leveraged asset only with its unlevered price chart.
A market gap can carry the price beyond a planned exit level before an order can execute. If collateral is concentrated in related positions, one decline can pressure several trades at once. Depending on the contract and jurisdiction, losses may exceed the cash initially committed.
Read the agreement before judging the headline multiple
Check the maintenance formula, eligible collateral, liquidation rights, interest calculation, and treatment of a deficit. A broker's maximum permitted exposure describes a platform limit, not a recommendation or proof that the position is affordable.
This article is educational information, not individualized investment, tax, legal, or accounting advice. The relevant risk is the obligation under the account agreement during an adverse move, not the leverage figure shown beside an order ticket.
Sources / References
- Understanding Margin Accounts — U.S. Securities and Exchange Commission — Supports the article's explanation of margin equity, maintenance requirements, margin calls, and the possibility of forced sales.
- Margin Accounts — FINRA — Supports the discussion of liquidation rights, maintenance margin, margin excess, and the need to understand current firm terms.
- Guidance on Margin — FINRA — Supports the safeguards around ready cash reserves, margin calls, and the fact that a firm may liquidate positions under its margin agreement.