Margin trading lets you borrow money from your broker to buy more securities than you could afford with cash alone

When you buy stocks or other securities with your own money, you own them outright. Margin trading works differently: your broker lends you cash so you can purchase securities worth more than your account balance. You pay interest on the borrowed amount, and the securities themselves serve as collateral. If the investment rises in value, your profit is larger than it would have been with cash alone — but if it falls, your losses are magnified by the same factor.

The mechanics are straightforward. You deposit cash into a margin account (not a regular brokerage account). Your broker then allows you to borrow against that deposit, typically up to 50 percent of the purchase price of the securities you want to buy. So if you have $10,000 in your account, you might borrow $10,000 more to purchase $20,000 worth of stock. You own the full $20,000 position, but you owe the broker $10,000 plus interest.

Key Takeaways

  • Margin accounts require a minimum deposit (often $2,000 to $5,000, depending on your broker) and are separate from regular cash accounts.
  • Your broker can force you to sell securities if your account value drops below the maintenance margin requirement, which is typically 25 to 30 percent of the total position value.
  • Interest rates on borrowed funds vary by broker and market conditions, and you pay interest whether your investment gains or loses money.
  • Margin trading amplifies both gains and losses, so a 10 percent drop in a stock you bought on margin can wipe out 20 percent or more of your original investment.

How the margin requirement works in practice

Brokers set two margin requirements: the initial margin and the maintenance margin. The initial margin is the percentage of the purchase price you must pay with your own cash when you first buy the security — usually 50 percent. The maintenance margin is the minimum percentage of your account value that must remain as equity at all times, typically 25 to 30 percent.

Here's a concrete example. You deposit $10,000 into a margin account. You want to buy $20,000 worth of stock, so you borrow $10,000 from your broker. If that stock drops to $15,000, your account now holds $15,000 in securities but you still owe $10,000, leaving you with $5,000 in equity. That $5,000 represents 33 percent of your $15,000 position — still above the 25 to 30 percent maintenance requirement, so you're fine. But if the stock drops to $13,000, your equity is now $3,000, which is only 23 percent of the position. You've fallen below maintenance margin, and your broker will issue a margin call.

A margin call means your broker demands you either deposit more cash or sell securities to bring your account back into compliance. You typically have a few days to respond, though brokers can force a sale immediately if the account drops far enough. If you don't act, the broker will liquidate your positions without asking, often at unfavorable prices during market stress.

Interest costs and how they accumulate

Borrowing from your broker is not free. You pay interest on the amount you've borrowed, and the rate varies based on how much you've borrowed, current market rates, and your broker's policies. Rates typically range from 5 to 12 percent annually, though they can move higher during periods of market volatility or when interest rates rise broadly.

The interest accrues daily and is usually deducted from your account monthly or quarterly. This means you're paying interest whether your investment makes money or loses it. If you buy $20,000 worth of stock with $10,000 borrowed at 8 percent annually, you're paying roughly $800 per year in interest — about $67 per month — just to hold the position. If the stock doesn't move, you've lost money. This is why margin trading works best for investors who believe the securities will rise enough to cover both the interest and generate a profit.

The amplified gains and losses you need to understand

Leverage is the core appeal and the core risk of margin trading. When you use margin, small percentage moves in the underlying security create much larger percentage moves in your account.

Suppose you buy $20,000 of stock with $10,000 of your own money and $10,000 borrowed. If the stock rises 10 percent to $22,000, your equity grows from $10,000 to $12,000 — a 20 percent gain on your original investment. But if the stock falls 10 percent to $18,000, your equity shrinks to $8,000 — a 20 percent loss. A 10 percent move in the stock becomes a 20 percent move in your account. With higher leverage, the multiplier grows even steeper.

This amplification is why margin trading carries substantially higher risk than buying securities outright. You can lose more than your initial investment if the security falls far enough. In extreme cases, if a stock you bought on margin drops to zero, you still owe the broker the full amount you borrowed, plus interest.

Broker requirements and account setup

Not every investor can open a margin account. Brokers require a minimum deposit, usually between $2,000 and $5,000, though some require more. You must also sign a margin agreement that explains the terms, the interest rate structure, and the broker's right to liquidate your positions if you fall below maintenance margin.

Brokers also have the right to restrict or close your margin account if they believe you're trading recklessly or if market conditions make lending too risky. During periods of extreme volatility, some brokers have raised margin requirements or halted margin lending entirely. This means even if you've been approved for margin, your access to it is not may provide to remain constant.

When margin trading can backfire

Margin trading has triggered some of the largest individual investor losses in market history. The risk intensifies during market downturns, when many investors face margin calls simultaneously. If you need to sell to meet a margin call, you're forced to sell at exactly the wrong time — when prices are falling and you have no choice.

Brokers also charge higher interest rates during volatile periods, which increases your carrying costs just when your positions are losing value. If you borrowed at 8 percent and the market drops 20 percent, you're now paying more to hold a position that's worth significantly less.

Additionally, margin accounts are subject to short-selling restrictions and pattern day trader rules if you trade frequently. The SEC's pattern day trader rule requires accounts with less than $25,000 to limit day trades to no more than four in five business days. Violating this rule can result in your account being restricted or frozen.

Frequently Asked Questions

Can I lose more money than I deposited with margin trading?

Yes. If a security drops sharply, your equity can fall below zero, meaning you owe the broker money beyond your initial deposit. For example, if you deposit $10,000 and borrow $10,000 to buy stock that falls to $5,000, you owe the broker $5,000 even after the position is liquidated. However, most brokers will force a sale before losses reach this point to protect themselves.

What happens if I can't meet a margin call?

Your broker will liquidate your positions without your permission to bring your account back into compliance. This forced sale typically occurs at market prices during the time of the call, which may be unfavorable if markets are moving quickly. You remain responsible for any shortfall between the sale proceeds and what you owe.

Is margin trading the same as day trading?

No. Margin trading is borrowing money to buy securities you hold for any length of time. Day trading is buying and selling the same security within a single trading day. You can day trade without margin (using only cash), and you can use margin for longer-term positions. However, day traders often use margin to amplify their positions, and they face additional SEC restrictions.

How do I know what my maintenance margin requirement is?

Your broker sets this in your margin agreement, typically 25 to 30 percent of your total position value. You can find the exact percentage in your account documents or by contacting your broker directly. Some brokers allow you to view your current margin level and how much cushion you have before a margin call in your account dashboard.

Can I use margin to buy any security?

No. Brokers restrict margin purchases to stocks, some exchange-traded funds, and bonds. You typically cannot use margin to buy cryptocurrencies, penny stocks, or certain other speculative securities. Your broker will tell you which securities are marginable when you attempt to purchase them.