Basics of Margin Trading for Investors

Trading on margin can magnify your returns, but it can also increase your losses. Learn the basics, benefits, and risks of margin trading.

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Key Takeaways

  • Margin allows traders to take larger positions with fewer funds. That's leverage
  • Trading on margin magnifies profits, but it also magnifies losses
  • Not all traders will qualify, and it's essential to understand margin thoroughly

Many investors are familiar with margin or margin trading, but may be fuzzy on what it is and how it works. That’s understandable, because margin rules differ across asset classes, brokerages, and exchanges.

For example, trading stocks on margin—under Regulation T, or “Reg T”—is quite different from trading futures on margin. But the underlying premise is the same: margin is borrowed money, aka “leverage,” often aimed at magnifying gains (although margin will also magnify losses).

Here are a few basic questions and answers about margin trading.

Why Use Margin?

You get more bang for your trading buck—or at least, that’s the idea. In margin trading, you’re only required to deposit a percentage of the notional value of a given security, which can juice your buying power. Margin provides “leverage” that, by taking greater risk, can enhance returns. Through margin, you put up less than the full cost of a trade, potentially enabling larger trades than could otherwise be made with the actual funds in your account.

What’s Considered “Margin?”

Similar to mortgages and other traditional loans, margin trading typically requires posting collateral with your broker, and you must pay interest on money borrowed. In many cases, securities in your account can act as collateral for the loan. (A TD Ameritrade account that’s approved for margin trading must have at least $2,000 in cash equity or eligible securities and a minimum of 30% of its total value as equity at all times.)

What Do I Need to Know about Reg T and Other Margin Rules?

Under Reg T, a Federal Reserve Board rule, you can borrow up to 50% of the purchase price of securities that can be purchased on margin, also known as “initial margin” (some brokerages require a deposit greater than 50% of the purchase price).

Exchanges and self-regulatory organizations, such as FINRA, have their own margin trading rules, and brokerages can establish their own margin requirements, so long as they are at least as restrictive as Reg T, according to the U.S. Securities and Exchange Commission. FINRA requires a minimum deposit with a brokerage of $2,000, or 100% of the purchase price, whichever is less. This is known as the “minimum margin.”

How About an Example of Trading on Margin?

Let’s say you want to buy 1,000 shares of a stock that’s currently trading at $50 per share. If you bought it with only the cash in your account, you’d need $50,000. But if you bought the shares through a margin account, you’d only need to have $25,000 in your account to purchase them—the other $25,000 would be covered by margin.

If the stock rises from $50 to $55 a share (for a gain of $5 per share, or $5,000), you’d have a 20% profit, because the gain is based on the $25 per share paid with cash, and excludes the $25 per share paid with funds borrowed from the broker.

But margin cuts both ways. If the stock dropped to $45 a share, you’d have a loss of 20%—double what the loss would be if you paid for the stock entirely in cash.

What Are the Risks of Margin Trading?

Because margin magnifies both profits and losses, it’s possible to lose more than the initial amount used to purchase the stock. This magnifying effect can lead to a “margin call,” when losses exceed a limit set either by a broker or the broker’s regulating body. This “maintenance” margin limit may be increased by the broker without prior notice, but often ranges from 30% to 40%, instead of the initial 50% required at the time of purchase.

The SEC spells out a pretty clear message. Margin accounts “can be very risky and they are not suitable for everyone,” the regulator says on its website. Before opening a margin account, the SEC says investors “should fully understand that they can lose more money than they invested” and they may be forced to sell some or all of their securities when falling stock prices reduce the value of their securities.

In volatile markets, the SEC adds, “investors who put up an initial margin payment for a stock may, from time to time, be required to provide additional cash if the price of the stock falls.” Some investors “have been shocked” to learn their brokerage has the right to sell their securities bought on margin—without any notification and potentially at a substantial loss to the investor, the SEC says.

How Does Trading on Margin Work in Futures, Options, and Currencies?

Margin requirements—also called performance bonds—for futures trading are substantially lower than stocks, typically ranging from 3% to 15% of the total contract value. Performance bonds are financial guarantees required of both buyers and sellers of futures to ensure they fulfill contract obligations.

In futures, similar to the case in stocks, you must first post initial margin to open a futures position, and if the margin equity falls below a certain amount, it must be topped up. This is known as the “maintenance margin” level.

Futures margins are set by the exchanges and vary depending on the commodity (market volatility is also a factor). For example, as of June 2018, CME Group WTI crude oil futures require a maintenance margin of about $2,500, or roughly 4% of the total contract value (the contract was trading around $64 a barrel in mid-June 2018, meaning one futures contract covering 1,000 barrels of oil had a notional value of about $64,000).

Margin requirements in the retail foreign exchange (“forex”) market can be even lower than futures—1% to 2% of the total value, and sometimes even smaller than that. “Generally, forex rules allow for the most leverage, followed by futures, then equities,”says Peter Klink, director of risk management at TD Ameritrade. “Depending on the product, forex and futures leverage can be at 20-to-1 or even 50-to-1 compared to equities’ overnight margin of 4-to-1.”

When used with caution and discipline, leverage can be a valuable tool in a trader’s arsenal, but the warning bears repeating: Margin is a double-edged sword. It can magnify losses as well as gains. If you plan to use margin, make sure you understand the risks, and be sure to regularly monitor your accounts. 

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Margin trading increases risk of loss and includes the possibility of a forced sale if account equity drops below required levels. Margin is not available in all account types. Margin trading privileges subject to TD Ameritrade review and approval. Carefully review the Margin Handbook and Margin Disclosure Document for more details. Please see our website or contact TD Ameritrade at 800-669-3900 for copies.

Futures and futures options trading is speculative, and is not suitable for all investors.  Please read the Risk Disclosure for Futures and Options prior to trading futures products. 

Futures accounts are not protected by the Securities Investor Protection Corporation (SIPC).

Futures and futures options trading services provided by TD Ameritrade Futures & Forex LLC. Trading privileges subject to review and approval. Not all clients will qualify.

Forex trading involves leverage, carries a high level of risk and is not suitable for all investors. Please read the Forex Risk Disclosure prior to trading forex products.   

Forex accounts are not protected by the Securities Investor Protection Corporation (SIPC). Forex trading services provided by TD Ameritrade Futures & Forex LLC. Trading privileges subject to review and approval. Not all clients will qualify. Forex accounts are not available to residents of Ohio or Arizona.  

Transaction costs (commissions and other fees) are important factors and should be considered when evaluating any options trade. Options involve risk and are not suitable for all investors. 

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Market volatility, volume, and system availability may delay account access and trade executions.

Past performance of a security or strategy does not guarantee future results or success.

Options are not suitable for all investors as the special risks inherent to options trading may expose investors to potentially rapid and substantial losses. Options trading subject to TD Ameritrade review and approval. Please read Characteristics and Risks of Standardized Options before investing in options.

Supporting documentation for any claims, comparisons, statistics, or other technical data will be supplied upon request.

The information is not intended to be investment advice or construed as a recommendation or endorsement of any particular investment or investment strategy, and is for illustrative purposes only. Be sure to understand all risks involved with each strategy, including commission costs, before attempting to place any trade. Clients must consider all relevant risk factors, including their own personal financial situations, before trading.

This is not an offer or solicitation in any jurisdiction where we are not authorized to do business or where such offer or solicitation would be contrary to the local laws and regulations of that jurisdiction, including, but not limited to persons residing in Australia, Canada, Hong Kong, Japan, Saudi Arabia, Singapore, UK, and the countries of the European Union.

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