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Maintenance Margin


Maintenance margin refers to the minimum amount of equity that an investor must maintain in their margin account to continue holding a position that was purchased on margin. It is a percentage of the market value of the securities, which varies depending on the broker’s requirements. This ensures that the investor has enough equity to cover potential losses and safeguards the broker from defaulted payments.


The phonetic pronunciation of “Maintenance Margin” is: /ˈmeɪntənəns ˈmɑrʤɪn/

Key Takeaways

  1. Maintenance Margin Definition: Maintenance margin is the minimum amount of equity required to be held in a margin account to maintain an open position. It is the percentage of the total market value of a security that an investor must maintain in their account to support the leveraged purchase.
  2. Margin Call: If an investor’s equity falls below the maintenance margin level, the broker may issue a margin call, requiring the investor to deposit additional funds or securities to bring the account back to the minimum equity level. Failure to meet a margin call may result in the forced liquidation of the securities at unfavorable prices, or the broker selling the securities in your account to cover the margin call.
  3. Risk Management: Maintenance margin requirements are in place to manage and reduce risks associated with leveraged trading. To prevent significant losses, investors and brokers closely monitor margin account balances and ensure they are meeting the necessary margin requirements to protect both parties from financial losses.


The maintenance margin is important in the realm of business and finance because it serves as a risk management tool to protect both investors and brokerages from potential losses associated with trading on margin. By establishing a minimum percentage of equity that must be maintained in a margin account, the maintenance margin ensures that investors have enough collateral to cover losses in the event of a decline in the value of their investments. Additionally, it helps prevent excessive leveraging and amplifies the need for responsible borrowing practices among investors. In summary, the maintenance margin plays a significant role in preserving the stability of the financial markets by mitigating risk and promoting conscientious trading behaviors.


Maintenance margin is an essential component in the finance world, primarily associated with margin accounts, which allows investors to borrow from their brokerage firms when purchasing securities. The purpose of a maintenance margin is to act as a risk management tool, protecting the brokerage firm and the investor from extensive losses in case market prices change unfavorably. By ensuring a certain level of equity is maintained in the margin account, brokers can maintain financial stability, and the risk of default on loans is minimized, ensuring smoother operations in the world of investments and securities trading. To illustrate its use, consider an investor who borrows capital from their broker to purchase securities. The investor is obliged to maintain a specific maintenance margin, which is essentially a percentage of the current market value of the securities held in the margin account. As market conditions fluctuate, so does the value of these securities. If the value of the securities falls below the maintenance margin, the broker has the right to issue a margin call, which requires the investor to either deposit additional funds or sell some securities to bring the account back up to the required minimum level. The maintenance margin, therefore, protects the broker and the investor from experiencing a downward spiral of losses in volatile market conditions while providing a reasonable level of confidence in leveraging funds for investment opportunities.


Maintenance margin is a requirement by brokers for investors who trade on margin, ensuring that they maintain a minimum balance of equity in their margin accounts to cover potential losses. 1. John’s Stock Trading: John buys $10,000 worth of shares using a margin account at his brokerage. His initial margin requirement is 50%, so he borrows $5,000 from the brokerage and invests $5,000 of his cash. The maintenance margin for the account is set at 25%. If the value of John’s shares declines, his equity in the margin account decreases. If his equity falls below the maintenance margin of 25% (i.e., below $2,500), he will receive a margin call from the brokerage to deposit additional funds or sell shares to meet the requirement. 2. Sarah’s Currency Trading: Sarah trades foreign currency on a margin account with a maintenance margin requirement of 3%. She buys $100,000 worth of EUR/USD with an initial margin requirement of 5%, which means she initially deposits $5,000. If the value of the currency pair declines and her equity decreases to less than 3% of the trade value (i.e., less than $3,000), her brokerage may issue a margin call, requiring her to deposit more funds or close the position to meet the maintenance margin requirement. 3. Acme Corporation’s Futures Contracts: Acme Corporation is involved in commodities trading and enters into a futures contract, speculating on the price of oil. Suppose the initial margin for this contract is $5,000 with a maintenance margin set at $3,500. If the price of oil goes against Acme Corp’s speculation and their balance in the margin account erodes below the $3,500 maintenance margin, they will receive a margin call from the clearinghouse or broker, asking them to deposit additional funds or liquidate their position to cover the potential losses.

Frequently Asked Questions(FAQ)

What is Maintenance Margin?
Maintenance margin is the minimum amount of equity that must be maintained in a margin account as a percentage of the total market value of the securities held in the account. It acts as a safety buffer to ensure that investors have sufficient funds to cover potential losses and protect the broker from potential defaults.
How does Maintenance Margin work?
When an investor uses a margin account, they can borrow funds from their broker to buy securities, using their existing securities as collateral. The maintenance margin is a percentage set by the broker or financial regulatory body that determines the minimum amount of equity the investor must have in relation to the loan amount. If the equity in the account falls below the required maintenance margin, the investor will receive a margin call and be required to either deposit more funds or sell some securities to meet the requirement.
What is the difference between Initial Margin and Maintenance Margin?
The initial margin is the amount of equity required to open a new position on margin, expressed as a percentage of the purchase price. The maintenance margin, on the other hand, is the minimum amount of equity that must be maintained as a percentage of the total market value of the securities in the account to avoid a margin call.
How do I calculate the Maintenance Margin?
To calculate the maintenance margin, you need to know the percentage required by your broker and the current market value of your securities. The formula is:Maintenance Margin Requirement = (Market Value of Securities * Maintenance Margin Percentage)
What happens if I don’t meet the Maintenance Margin requirements?
If your account falls below the maintenance margin requirements, you will receive a margin call. You must either deposit additional funds into your account or sell off some of your securities to bring the account back up to the required level. Failure to meet a margin call can result in the liquidation of your positions or even the closing of your account.
How can I avoid a Margin Call?
To avoid margin calls, it is crucial to monitor your margin account regularly and ensure your equity remains above the required maintenance margin. Utilizing risk management techniques such as diversification, setting stop-loss orders, and using proper leverage can help minimize the likelihood of a margin call.
Are Maintenance Margin requirements constant across all brokers?
No, the maintenance margin requirements may vary between brokers and can be influenced by the type of securities held in the account, as well as market conditions. It is important to be familiar with your broker’s specific requirements and regulations before opening a margin account. Additionally, regulatory bodies like FINRA may implement standard minimum requirements that brokers must follow.

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