What Is Margin in Trading?
Margin is the practice of borrowing money from your broker to buy securities, using your existing investments as collateral. It amplifies both gains and losses, and a margin call forces you to add funds or sell if your account value drops too low.
How Margin Works
When you open a margin account, your broker lends you money using your existing holdings as collateral. If you have $10,000 and your broker offers 2:1 margin, you can buy up to $20,000 worth of securities. You pay interest on the borrowed amount for as long as you hold the position.
A margin call occurs when your account equity falls below the broker's minimum maintenance requirement — typically 25-30% of the total position value. When this happens, you must either deposit additional funds or sell positions to bring your account back into compliance. If you fail to meet a margin call, the broker can liquidate your holdings without your permission.
Why Margin Matters for Your Financial Goals
Margin trading is a tool for experienced traders, not a strategy for building long-term wealth. The interest costs, the risk of margin calls during market downturns, and the amplified losses make margin unsuitable for most investors. Many devastating losses in market history have been caused by excessive margin use.
If you use margin, do so sparingly and with a clear risk management plan. Never use margin to buy speculative or highly volatile assets, and always have a plan for what you will do if a margin call occurs. For most people, investing with money you actually have is the safer and more sustainable path.
Key Takeaway
Margin lets you borrow to invest, but the risks — including margin calls and amplified losses — make it unsuitable for most investors. Invest with money you own.
Related Terms
Leverage
Leverage is the use of borrowed capital to control a larger market position than your own funds would allow. For example, 10:1 leverage lets you control $10,000 with just $1,000. It amplifies both gains and losses equally.
Brokerage Account
A brokerage account is an investment account opened with a brokerage firm that allows you to buy and sell securities like stocks, bonds, mutual funds, and ETFs. It's the gateway between your bank and the financial markets.
Stop-Loss Order
A stop-loss order is an instruction to your broker to automatically sell a security when it drops to a specific price, limiting your potential loss. For example, buying at $50 with a stop-loss at $45 caps your maximum loss at 10%.