Margin Trading and Leverage Explained: How It Works

Margin trading is the use of money borrowed from a broker to purchase or hold securities. Leverage means controlling a larger market position with less of your own capital. Because gains and losses apply to the full position while the loan remains owed, margin can magnify returns, losses, interest costs and the risk of forced liquidation.

The mechanics can make leverage appear attractive when prices rise. The same structure becomes much less forgiving when prices fall because the investor still owes the borrowed amount even after the securities decline in value.

Margin trading therefore changes more than purchasing power. It changes how quickly account equity can rise or disappear.

What Is Margin Trading?

Margin trading means using funds borrowed from a brokerage firm to finance part of an investment position.

Suppose an investor has $10,000 in cash.

Without borrowing, the investor could purchase $10,000 of eligible securities.

With margin, the investor may be able to combine that $10,000 with borrowed money and control a larger position.

For example:

Source of Funds	Amount
Investor capital	$10,000
Margin loan	$10,000
Total securities purchased	$20,000

The investor has $20,000 of market exposure while contributing only $10,000 of personal capital.

That is leverage.

What Does Leverage Mean in Investing?

Leverage describes the use of borrowed capital or another financial structure to create exposure greater than the investor’s own money.

In a simple margin account example, an investor using $10,000 of personal capital to control $20,000 of securities has approximately two times gross exposure relative to the original capital.

Leverage affects both directions.

A 10% gain on the $20,000 investment creates a $2,000 market gain.

A 10% decline creates a $2,000 market loss.

Relative to the investor’s original $10,000, those changes equal approximately 20% before considering margin interest and other costs.

The market moved 10%, but the investor’s equity moved approximately twice as much.

Margin Trading vs Investing With Cash

The difference becomes clear when two investors purchase the same security.

Feature	Cash Purchase	Margin Purchase
Investor capital	$10,000	$10,000
Borrowed funds	$0	$10,000
Total position	$10,000	$20,000
10% market gain	$1,000	$2,000 before interest
10% market loss	$1,000	$2,000

The leveraged investor receives greater exposure to the same price movement.

However, the borrowed $10,000 remains a liability.

That difference becomes increasingly important as the investment declines.

What Is a Margin Account?

Margin trading normally requires a margin-enabled brokerage account.

The brokerage firm lends money to the customer and uses securities and other eligible assets in the account as collateral.

A standard cash account works differently because securities must be fully paid for rather than financed with a margin loan.

Our guide to a brokerage account explains the broader differences between cash and margin account structures.

Before using margin, investors generally sign a margin agreement describing the firm’s lending terms, interest calculations, collateral rights and margin requirements.

How Does Buying on Margin Work?

A simplified margin transaction can be divided into several stages.

1. The Investor Deposits Capital

The investor first contributes eligible cash or securities to the account.

Minimum equity requirements can apply before leverage becomes available.

2. The Broker Provides Credit

The brokerage firm allows the investor to borrow against account collateral within applicable regulatory and house limits.

The firm providing this credit is the same type of market intermediary described in our guide to a broker.

3. Securities Are Purchased

The combined investor equity and borrowed money are used to create a larger position.

Not every security is necessarily eligible for the same margin treatment.

4. Interest Accrues on the Loan

The investor pays interest for as long as the margin debt remains outstanding.

5. Account Equity Changes With Market Prices

The securities fluctuate in value while the amount owed to the brokerage firm does not automatically fall just because the investment price declines.

This causes the investor’s equity percentage to change continuously.

What Is Initial Margin?

Initial margin describes how much investor equity is required when establishing a leveraged securities position.

For many U.S. margin equity securities, Federal Reserve Regulation T generally allows a broker to lend up to 50% of the purchase price.

A simplified transaction could therefore look like this:

Purchase Price	Investor Equity	Margin Loan
$20,000	$10,000	$10,000

This 50% figure should not be interpreted as a promise that every security can always be purchased with only half of the investor’s own money.

Brokerage firms can impose stricter requirements, and some securities may have substantially higher margin requirements or may not be marginable at all.

What Is Maintenance Margin?

Initial margin determines the equity required when the leveraged position is established.

Maintenance margin determines how much equity must remain after the trade is open.

In the United States, FINRA generally requires maintenance equity of at least 25% of the current market value of long margin securities.

Brokerage firms frequently impose higher house requirements.

A broker might require 30%, 40% or more depending on:

• the security;
• market volatility;
• position concentration;
• liquidity;
• account risk;
• the firm’s own policies.

This is important because the regulatory minimum is not necessarily the threshold an individual investor will actually face.

How Is Margin Equity Calculated?

Margin equity can be expressed with a simple relationship:

Account Equity = Market Value of Securities − Margin Loan

Suppose an investor owns securities currently worth $18,000 and owes the broker $10,000.

The account equity is:

$18,000 − $10,000 = $8,000

The equity percentage is then:

$8,000 ÷ $18,000 = approximately 44.4%

If the market value falls while the loan remains $10,000, the equity percentage falls faster than the security price itself.

What Is a Margin Call?

A margin call occurs when account equity becomes insufficient under the applicable maintenance requirement.

The brokerage firm may require the customer to:

• deposit additional cash;
• deposit eligible securities;
• reduce leveraged positions;
• otherwise restore sufficient equity.

The term “margin call” can create the misleading impression that the broker must always contact the customer and patiently wait for additional money.

That is not necessarily how a margin agreement works.

Depending on the agreement and circumstances, the brokerage firm may have the right to liquidate securities without first consulting the investor.

How to Calculate a Margin Call Price

A useful way to understand margin risk is to calculate the market value at which an account reaches its maintenance threshold.

If:

• L = margin loan;
• M = maintenance requirement;
• V = minimum market value before the equity percentage falls below maintenance;

then a simplified relationship is:

V = L ÷ (1 − M)

Consider an investor who purchases $20,000 of securities using:

• $10,000 of personal money;
• $10,000 borrowed from the broker.

Suppose the firm’s maintenance requirement is 30%.

The threshold is approximately:

$10,000 ÷ (1 − 0.30) = $14,285.71

Once the position falls near that level, account equity approaches the 30% maintenance threshold.

At $14,285.71 of market value:

Equity = $14,285.71 − $10,000 = $4,285.71

And:

$4,285.71 ÷ $14,285.71 ≈ 30%

This example also shows why a higher house maintenance requirement causes forced-action risk to appear sooner.

How Leverage Amplifies Gains

Assume an investor contributes $10,000 and borrows another $10,000.

The investor purchases $20,000 of stock.

If the stock rises 20%, the position becomes worth $24,000.

Ignoring interest and fees:

$24,000 − $10,000 loan = $14,000 equity

The investor started with $10,000 and now has $14,000 of equity.

That is a 40% gain on the investor’s original capital from a 20% rise in the securities.

The leverage magnified the upside.

How Leverage Amplifies Losses

Now reverse the example.

The $20,000 position falls 20% and becomes worth $16,000.

The loan still equals $10,000.

Investor equity becomes:

$16,000 − $10,000 = $6,000

The market fell 20%, but the investor’s original $10,000 has declined to $6,000.

That is a 40% loss before margin interest.

Market Move	Position Value	Investor Equity	Change in Original $10,000 Equity
+20%	$24,000	$14,000	+40%
0%	$20,000	$10,000	0%
-20%	$16,000	$6,000	-40%
-40%	$12,000	$2,000	-80%
-50%	$10,000	$0	-100%

A decline greater than 50% in this simplified example can leave the account with negative equity before considering forced liquidation, interest and other costs.

Why Margin Losses Can Exceed the Initial Investment

Owning a fully paid stock normally limits the market loss on that position to the capital used to purchase it.

A leveraged position contains borrowed money as well.

Suppose the investor’s $20,000 leveraged position falls to $8,000 before it can be liquidated.

The broker is still owed approximately $10,000 plus applicable interest.

The account is therefore short by roughly $2,000 even after the securities are sold.

The investor can owe money in addition to losing the original $10,000 contribution.

This is one of the defining differences between ordinary fully paid investing and leveraged investing.

Margin Interest Changes the Break-Even Point

The borrowed money is not free.

Brokerage firms charge interest on outstanding margin loans.

That expense increases the return the underlying securities must generate before the investor makes a net profit.

Consider a position that produces a 7% investment gain over a period in which borrowing costs and other expenses consume 4% of the financed capital.

The leverage still amplified the market exposure, but part of the return is transferred to the brokerage firm through interest.

The effect becomes more important when:

• margin rates are high;
• the loan is large;
• the position is held for a long time;
• investment returns are modest.

A leveraged trade can therefore move in the correct direction and still produce a disappointing net result.

Margin Rates Can Vary Between Brokers

Margin interest rates are not universally identical.

Brokerage firms can use different pricing structures, including rates that vary according to the size of the debit balance.

An investor comparing margin services should understand:

• the stated interest rate;
• whether the rate is variable;
• how often interest accrues;
• how changes are communicated;
• how cash balances interact with margin debt;
• how the loan balance can be reduced.

The cheapest trading commission does not necessarily mean the cheapest leveraged account.

A Broker Can Liquidate Securities Without Waiting for You

One of the most important margin risks is loss of control over liquidation timing.

If account equity becomes inadequate, a brokerage firm may have contractual rights to sell securities to reduce the margin loan.

The investor may not be entitled to:

• choose which position is sold;
• receive advance notice;
• wait for a market rebound;
• receive an extension of time to satisfy the requirement.

This can create a particularly damaging sequence during a fast decline.

An investor may believe a security is temporarily undervalued and intend to hold it through volatility.

Leverage can remove that choice by forcing a sale at exactly the time the investor would prefer not to sell.

House Margin Requirements Can Change

Regulatory margin levels are only part of the picture.

Brokerage firms can establish stricter house requirements.

A firm may also increase those requirements when it believes a position has become more risky.

Factors can include:

• extreme volatility;
• limited liquidity;
• high concentration;
• a rapidly falling security;
• unusual market events.

This creates an important risk that is sometimes overlooked.

An account can move toward a margin deficiency even when the security price has not changed dramatically if the broker increases the required equity percentage.

Not Every Security Is Marginable

Opening a margin account does not mean every investment can automatically be financed with the same amount of borrowing.

Brokerage firms can apply different requirements to different securities.

A widely traded large-company stock may receive different margin treatment from:

• a highly volatile stock;
• a low-priced security;
• a concentrated position;
• a newly listed security;
• certain funds or specialized products.

An investor should therefore distinguish between having a margin-enabled account and having available borrowing capacity for a specific security.

Margin Trading During a Stock Market Crash

Leverage can become especially dangerous when prices fall quickly across the market.

During a severe stock market crash, several pressures can occur at once:

• security prices fall;
• account equity declines faster because of leverage;
• volatility rises;
• liquidity can weaken;
• brokers may raise house margin requirements;
• forced liquidations can add additional selling pressure.

This creates a feedback effect.

Declining prices cause leveraged accounts to lose equity. Investors or brokers then sell assets to restore margin levels, and those sales can occur into an already weak market.

The investor who owns fully paid securities may have the option to wait.

The leveraged investor may not.

Why Concentration and Margin Are a Dangerous Combination

A diversified account can still experience substantial losses, but concentration adds another layer of risk.

Imagine that nearly all leveraged exposure is tied to one company.

A company-specific event causes the stock to fall 35% overnight.

The investor cannot gradually reduce the position before the decline because the new price appears when trading resumes.

At the same time, the broker may increase its maintenance requirement because volatility has risen.

The account therefore faces both:

• a sharp decline in collateral value;
• a potentially higher equity requirement.

This combination can cause a margin deficiency much faster than a simple leverage ratio initially suggests.

Margin Trading and Short Selling

Short selling generally requires a margin account because the transaction involves borrowed securities and collateral obligations.

A short seller borrows shares, sells them and hopes to repurchase them later at a lower price.

The risk differs from owning a leveraged long position.

A long stock can theoretically fall to zero.

A stock sold short has no fixed maximum price, so potential loss on an uncovered short position can be extremely large.

These requirements are therefore an important part of short-selling risk management.

Margin Trading and Options

Certain options strategies are also connected with margin accounts.

The relationship can be confusing because purchasing an option does not necessarily mean borrowing part of its premium in the same way as purchasing margin stock.

However, some strategies involving written options create collateral and margin requirements.

Those positions can expose investors to losses substantially larger than the premium initially received.

Options margin should therefore be understood as its own risk framework rather than assuming ordinary stock-margin rules apply identically.

U.S. Day-Trading Margin Rules Changed in 2026

Active U.S. traders should be aware that FINRA adopted new intraday margin requirements effective June 4, 2026.

The changes replace the previous day-trading margin framework, including the traditional pattern day trader structure, with a more risk-based intraday system.

However, there is a transition period through October 20, 2027.

That means different brokerage firms can be operating under different stages of implementation during the transition.

Under the newer framework, the historical $25,000 pattern day trader minimum is removed once a firm moves to the new standards. Instead, firms monitor whether the account maintains adequate equity relative to intraday positions.

An intraday margin deficit can lead to restrictions if it is not addressed according to the firm’s requirements.

Because implementation timing can differ between brokers, active traders should verify which margin system their own firm currently applies rather than relying on an older general rule remembered from previous years.

Margin Trading Is Not the Same as Having Buying Power

Brokerage platforms frequently display a number labeled buying power.

That number can be larger than the investor’s cash balance because margin credit may be available.

Seeing $30,000 of buying power does not mean the investor owns $30,000 of available cash.

Part of that capacity can represent borrowed money.

This distinction matters because using all displayed buying power can leave very little room for ordinary market volatility.

A portfolio that technically satisfies the minimum requirement when opened can quickly become vulnerable after even a moderate decline.

A Practical Margin Trading Example

Consider an investor named Daniel.

Daniel deposits $15,000 and borrows another $15,000 to purchase $30,000 of margin-eligible securities.

The account initially looks like this:

Component	Amount
Market value	$30,000
Margin loan	$15,000
Investor equity	$15,000
Equity percentage	50%

The brokerage firm requires 35% maintenance equity.

Several weeks later, the investments fall 25%.

The market value declines to $22,500.

The margin loan remains approximately $15,000 before considering repayments or accrued interest.

Daniel’s equity is now:

$22,500 − $15,000 = $7,500

His equity percentage is:

$7,500 ÷ $22,500 = 33.3%

The account is below the broker’s 35% maintenance requirement.

Even though the securities fell 25%, Daniel’s equity fell from $15,000 to $7,500—a 50% decline before interest.

The brokerage firm can require additional equity or reduce the position according to the margin agreement.

What Happens If the Market Recovers After Forced Liquidation?

The investor may not participate fully in the recovery.

This is an important difference between ordinary volatility and leverage-induced liquidation.

Suppose a stock falls sharply, triggering the sale of a leveraged position.

The price later recovers to its previous level.

An unleveraged investor who continued holding may recover the temporary market loss.

The leveraged investor whose shares were sold no longer owns the same position.

The market recovery does not automatically reverse the realized loss.

Leverage can therefore transform temporary volatility into permanent capital loss through forced timing.

When Can Margin Become Particularly Risky?

Margin risk tends to increase when several conditions overlap.

Examples include:

• high leverage;
• concentrated positions;
• volatile securities;
• low market liquidity;
• high borrowing costs;
• short investment horizons;
• little cash available outside the account;
• rapidly changing house margin requirements.

Any one of these conditions can be manageable in isolation.

Combining several at once can make the account much more fragile.

Questions to Ask Before Using Margin

Margin is a borrowing decision as well as an investment decision.

Useful questions include:

• How much can the investment fall before maintenance requirements become a problem?
• What is the broker’s current house margin requirement?
• Can that requirement change?
• What interest rate applies to the margin loan?
• How often does the rate change?
• Which securities can the broker liquidate?
• Is advance notice required before liquidation?
• How concentrated is the leveraged exposure?
• Could the investor repay the loan if market value falls severely?

If these questions do not have clear answers, the investor may not yet understand the real risk created by the loan.

Common Margin Trading Mistakes

Focusing Only on Additional Buying Power

Extra purchasing capacity is the most visible benefit of margin.

The corresponding increase in downside exposure is just as important.

Ignoring Interest Costs

A margin loan can remain outstanding much longer than originally expected.

Interest continues reducing investment returns during that period.

Assuming a Margin Call Must Come First

A brokerage firm may have the right to liquidate securities without waiting for the investor to respond to a traditional call.

The margin agreement determines important details.

Using Maximum Available Leverage

An account opened close to its minimum equity requirement has little room for normal price fluctuations.

A relatively modest decline can create immediate pressure.

Assuming Maintenance Requirements Never Change

House requirements can rise when a broker considers a security or account more risky.

This can reduce available leverage even without a major price movement.

Concentrating Borrowed Money in One Position

Company-specific news can produce sudden gaps that bypass the gradual price movements an investor expected.

A concentrated leveraged account can therefore deteriorate extremely quickly.

Treating Leverage as a Way to Recover Previous Losses

Increasing borrowing after a portfolio decline does not repair the original loss.

It increases exposure at a time when the investor may already be under financial or emotional pressure.

Frequently Asked Questions

What is margin trading in simple terms?

Margin trading means borrowing money from a brokerage firm to purchase or hold securities. The investments in the account generally serve as collateral for the loan. Borrowing increases purchasing power but can also magnify losses and create margin calls or forced liquidation.

What is leverage in trading?

Leverage means controlling a market position larger than the investor’s own capital. For example, using $10,000 of personal money and $10,000 of borrowed money creates $20,000 of exposure. A percentage change in the full position therefore has a larger percentage effect on the investor’s equity.

How much can you borrow on margin?

For many U.S. margin equity securities, Regulation T generally allows borrowing up to 50% of the purchase price at the time the position is established. Brokerage firms can impose stricter requirements, and not every security receives the same margin treatment.

What is maintenance margin?

Maintenance margin is the minimum equity that must remain in a margin account after a leveraged position has been established. FINRA generally requires at least 25% maintenance equity for eligible long margin securities, while brokerage firms frequently impose higher house requirements.

What happens during a margin call?

A margin call indicates that account equity has fallen below the applicable requirement. The investor may need to deposit cash or eligible securities or reduce positions. Depending on the margin agreement, the brokerage firm can also liquidate securities without waiting for the investor to act.

Can you lose more than you invest with margin?

Yes. Because borrowed money still must be repaid, a severe market decline can reduce account assets below the amount owed to the brokerage firm. The investor can lose the original capital and still owe additional money, interest or other charges.

Does margin interest reduce investment returns?

Yes. Margin interest is a borrowing cost and directly reduces net investment returns. The longer a margin loan remains outstanding and the higher the interest rate, the greater the return the investment must produce simply to offset financing costs.

Can a broker sell my investments without permission?

A margin agreement can give the brokerage firm the right to liquidate securities when account equity becomes insufficient. Investors may not always receive advance notice or be allowed to choose which holdings are sold.

Is margin trading suitable for every investor?

No. Margin introduces borrowing costs, amplified losses, changing collateral requirements and potential forced liquidation. Whether that risk is appropriate depends on financial resources, investment objectives, liquidity needs and the ability to tolerate losses exceeding the original capital invested.

Final Thoughts

Margin trading changes the economics of an investment by adding borrowed money to the position.

Leverage can magnify profits when markets move in the investor’s favor, but exactly the same mechanism magnifies losses when prices decline.

The most important risk is not simply that a leveraged investment can lose value faster.

Borrowing also introduces margin interest, maintenance requirements and the possibility that the brokerage firm will liquidate positions before the investor wants to sell.

House requirements can rise, highly volatile securities can receive stricter treatment and a severe market decline can rapidly reduce the value of collateral.

Investors considering margin should therefore evaluate the full structure: market exposure, loan size, interest cost, maintenance threshold, position concentration and the broker’s liquidation rights.

Leverage does not create a better investment. It creates a larger exposure to whatever investment result occurs.