Microsoft strongly encourages users to switch to a different browser than Internet Explorer as it no longer meets modern web and security standards. Therefore we cannot guarantee that our site fully works in Internet Explorer. You can use Chrome or Firefox instead.


Understanding the Financial Term 'Margin'

Margin, a term commonly used in the finance and investing world, refers to the concept of borrowing funds from a broker to buy or invest in securities. It is essentially a performance bond, or collateral, that is held to facilitate trading activities. Margin is crucial for various types of financial transactions and understanding its applications and implications can help investors make informed decisions in their financial pursuits.

How Margin Works

When an individual desires to purchase securities but lacks the capital to do so, they can approach a brokerage firm that offers margin accounts. This allows the investor to borrow funds and use their own cash or securities as collateral. It is important to note that margin trading amplifies both potential gains and losses. Therefore, while it can provide higher returns, it also comes with increased risk.

The investor's initial investment, referred to as the 'initial margin,' is a percentage of the total value of the securities to be purchased. Brokerage firms are required to set the minimum initial margin, with the Financial Industry Regulatory Authority (FINRA) mandating a minimum of 25% in the United States. However, brokerage firms may choose to enforce higher requirements.

Maintenance Margin and Margin Calls

Once the investor has purchased securities on margin, they are obligated to maintain a certain level of equity in their margin account. This is known as the 'maintenance margin.' The minimum maintenance margin set by FINRA is 25%, though it can vary across brokerage firms.

When the equity in the margin account falls below the maintenance margin, the broker will issue a 'margin call,' requiring the investor to deposit additional cash or securities to bring their account back to the required level. Failure to meet a margin call may result in the broker liquidating some of the investor's securities to restore the account to the required minimum.

Margin and Short Selling

Margin is also applicable in short selling, an investing strategy that involves borrowing shares of a stock from a broker and selling them in the open market with the expectation that the share price will drop. The goal is to repurchase the shares at a lower price, return them to the broker, and pocket the difference.

In short selling, the borrowed shares are sold to other market participants, who are unaware that these shares are being borrowed. The profit or loss in short selling is the difference between the sale price of the borrowed shares and the repurchase price, minus any fees or interest charged by the broker.

Risks Associated with Margin Trading

While margin trading can amplify profits, it is also accompanied by increased risks. Understanding these risks is essential for investors considering margin accounts.

  1. Leverage: One of the main benefits of margin trading is leverage, which allows investors to control a large position with a smaller amount of capital. However, leverage can also magnify losses, leading to significant financial setbacks.

  2. Margin Calls: As mentioned earlier, if the equity in the margin account falls below the maintenance margin, investors must deposit additional funds or securities to meet the margin call. This can result in the forced sale of securities at unfavorable prices or additional borrowing, leading to further financial strain.

  3. Interest Payments: Borrowing on margin entails interest payments to the broker, which adds to the cost of holding a position. The interest charges can potentially negate gains made through trading.

  4. Potential Liquidation: If unable to meet the margin requirements or margin calls, the broker can liquidate the investor's assets without notifying them. This can result in the investor forfeiting the opportunity to sell at a more favorable price, leading to significant losses.

Margin Trading Tips

Considering the risks associated with margin trading, investors should take certain precautions to manage risk and ensure they engage in margin trading responsibly:

  1. Conduct thorough research and analysis before trading on margin. Ensure the potential profits warrant the increased risk.
  2. Diversify investments to spread risk across various sectors and asset classes.
  3. Regularly monitor the margin account and follow market trends to keep on top of any changes that may require adjustments as necessary.
  4. Ensure a sufficient cash buffer in the margin account to avoid margin calls and potential liquidation of assets.
  5. Be cautious with leverage and avoid overextending. Utilize leverage responsibly only when the potential returns on investment outweigh the risk.


Margin is a powerful financial tool, providing investors with increased exposure and potential profits. However, it also comes with significant risks, including the potential for magnified losses and margin calls. By understanding the mechanics of margin and employing risk management strategies, investors can make informed decisions when utilizing margin accounts and trading on borrowed funds.