
What is margin?
Stock margin refers to the practice of borrowing funds from a brokerage to purchase securities, usually stocks. It involves using your existing investment or cash as collateral to borrow additional money, allowing you to leverage your investment and potentially increase your returns. Margin trading can amplify both gains and losses, making it a higher-risk strategy compared to buying stocks with cash only.
Here are some key concepts related to stock margin:
- Margin Account: To engage in margin trading, you need to open a margin account with a brokerage. This is different from a cash account, where you only trade with the money you have deposited. In a margin account, you can borrow funds from the broker to increase your buying power.
- Initial Margin: This is the minimum amount of equity (your money) that must be maintained in your margin account to open a position. It is expressed as a percentage of the total value of the investment. For example, if the initial margin requirement is 50%, you would need to have at least 50% of the total value of the investment in your account.
- Maintenance Margin: Once you’ve opened a position, the maintenance margin is the minimum amount of equity that must be maintained in your margin account to keep the position open. If the value of the investment falls and your equity drops below the maintenance margin, you may receive a margin call.
- Margin Call: A margin call occurs when the value of the securities in your account falls below a certain level, and you are required to deposit additional funds to bring the account back to the required level. If you fail to meet a margin call, the brokerage may liquidate some or all of your positions to cover the debt.
- Leverage: Margin trading allows you to control a larger position with a smaller amount of money. For example, with 2:1 leverage, a $10,000 investment could control $20,000 worth of securities. While leverage can amplify profits, it also increases the potential for larger losses.
It’s important to note that margin trading involves significant risks, and it may not be suitable for all investors. Prices of securities can be volatile, and using borrowed money can lead to substantial losses. Investors should carefully consider their risk tolerance and be aware of the terms and conditions associated with margin trading before engaging in such activities.

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