Leverage and Liquidation: The Move Size That Wipes You Out

You wired $500 into a margin account on a Tuesday afternoon, bought 100 units of an asset trading at $50.00 with 10x leverage, and went to bed holding $5,000 of exposure. Wednesday morning the price is $45.50. Down 9%. Your account is closed and the balance reads zero.

The move that ended you was 9%. The move that “should” have ended you, by the arithmetic most people carry in their heads, was 10%. The gap between those two numbers is where almost everything interesting about leverage lives, and it is not a rounding error — it is the exchange’s risk desk, doing exactly what it told you it would do in a document you probably did not read.

Leverage scales the move, not just the payoff

Start with the $5,000 position and forget liquidation for a second. You own 100 units at $50.00. Every dollar the price moves, your position gains or loses $100. Against $500 of your own money, that is 20% of your capital per dollar of price.

Push the price to $55.00 and your equity is $1,000. You doubled your money on a 10% move, which is the version of this story that gets screenshotted.

Now run it the other way. At $45.00 your position is worth $4,500, you borrowed $4,500 of it, and your equity is $0. Same 10%, same $500, opposite sign. The leverage does not know which direction the price went. It multiplies distance, and distance has no sign.

What changes when you turn the leverage dial is not how much you can lose. It is how far the market has to travel to take it. At 20x, that same $500 buys 200 units and $10,000 of notional, and a $2.50 move — 5% — is the whole account. At 50x it takes $1.00. At 100x, fifty cents, which on plenty of assets is a slow Tuesday.

The number worth memorising

Ignore fees, funding, and the exchange’s buffer for a moment, and the adverse move that erases your margin is:

Liquidation move (%) ≈ 100 ÷ leverage

Ten times leverage, ten percent. Twenty-five times, four percent. This is approximate on purpose. It is the version you can do in your head while a leverage slider is sitting in front of you, and it is close enough to tell you whether the position you are about to open survives an ordinary bad day for that asset.

Here is the same $500 across five settings, holding everything else constant:

Read the last column, then read it again. It never changes. Leverage does not increase the dollars at stake — the $500 was always all of it. It shrinks the price move required to collect them. Higher leverage asks less of the market, not more.

The exchange closes you before zero

Nobody lets your equity run to $0.00 and then politely settles up. If they did, they would be the ones absorbing the loss every time the price kept falling between the moment your account hit zero and the moment a closing order actually filled. So they build in a buffer, call it maintenance margin, and close you when your equity touches it.

Back to Tuesday night. Suppose the venue requires maintenance margin of 0.5% of position value on that contract. Your equity at any price P is $500 + 100 × (P − $50). The requirement is 0.5% × 100 × P. Set them equal and the liquidation price is about $45.23 — a 9.5% move, not 10%. At $45.50 you had $50 of equity against a $22.75 requirement, technically alive. Twenty-seven cents lower and the engine closes you.

That is a thin buffer because derivatives venues offering double-digit leverage run thin buffers. US equities work on a completely different scale. Reg T caps a new stock purchase at 2x, and FINRA’s baseline maintenance requirement is 25% of market value, with brokers free to demand more — many do, especially on volatile or low-priced names. FINRA’s investor education page on margin lays out how those thresholds work.

Run the equities case with real numbers. You bring $10,000, borrow $10,000, and buy 200 shares at $100.00. Your debt is fixed at $10,000; your equity is 200 × P − $10,000. The 25% requirement is 50 × P. Those meet at P = $66.67. So a 33% decline triggers the call — not the 50% the simple formula predicts for 2x leverage.

Same lesson in both cases, different magnitudes. The buffer always moves the line closer to you, never further away. It is there to protect the lender’s collateral, and it does that job well. It does nothing for you except end the trade sooner.

Futures work differently again. CME Group sets margin per contract and revises it as volatility changes, which is why the deposit required to hold a position you already own can rise mid-week without the price doing anything unusual. Their margin requirements overview publishes the current levels. A trader who sized a position to the old requirement and left no cash spare gets a call not because the market went against them, but because the market got noisier.

Gaps break the model

Every calculation above assumes the price walks through your liquidation level, giving the matching engine a chance to close you near the number it computed. Markets do not always cooperate.

A stock that closed at $100.00 can open at $92.00 on an overnight release, and there is no trading in between — the $95.00 and $94.00 prints simply do not exist. Crypto has no closing bell, which sounds like the opposite problem but produces the same one: a violent 3 a.m. move on thin books can clear through several percent of depth before any liquidation order gets filled.

When that happens the loss does not stop at your deposit. Your position keeps existing at prices below the level where your equity ran out, and someone has to absorb the difference. Some venues run an insurance fund and socialise the shortfall across profitable traders. Some hand it straight back to you as a negative balance and expect payment. Some US brokers restrict negative balances by rule and others do not, and the answer is in the account agreement, not the marketing page.

Funding eats the cushion while nothing happens

Leveraged positions cost money to hold. On a perpetual swap, funding changes hands at fixed intervals — commonly three times a day — as a percentage of notional, not of your deposit. That distinction is the whole point.

Say funding runs 0.01% per interval on your $5,000 position. That is fifty cents a payment, $1.50 a day, about $10.50 over a week. Against the notional it is noise. Against your $500 of actual capital it is 2% gone in seven days with the price flat, and it moves your liquidation price toward you the entire time. Hold long enough at high leverage and funding alone walks the market into you.

Financed stock positions have the same structure with a different name and a slower clock. Margin interest accrues daily on the borrowed balance, and on a $10,000 loan at a typical broker rate it is a real number that compounds against you while you wait to be right.

What this does not tell you

The model here is linear and simplified. Specifically, it leaves out:

• Non-linear instruments. Options do not move one-for-one with the underlying, and their exposure changes as the price and the calendar move. None of the arithmetic above transfers to them.
• Partial liquidations. Several venues close a fraction of the position as margin erodes rather than the whole thing at once. That changes your effective leverage mid-trade, usually downward, and makes the single liquidation price above a moving target.
• Slippage on the closing fill. The price the engine calculates and the price you are actually exited at are different numbers in a fast or thin market, and the difference lands on you.
• Correlated positions. Three leveraged longs in assets that move together are not three independent bets. One macro headline hits all three, and your account equity — which is what the margin system watches — falls faster than any single position’s math suggests.
• Fee drag on entry and exit. Taker fees on a $5,000 notional round trip are small in dollars and meaningful against $500 of capital.

None of this makes the core relationship wrong. It means real outcomes land somewhat worse than the clean percentages, and on the days that matter, considerably worse.

FAQ

What price move liquidates a 10x position?

Roughly 10% against you, minus whatever your venue’s maintenance margin requires. On the $500-at-$50.00 example with a 0.5% maintenance requirement, liquidation lands near $45.23 — about 9.5%. Take the 100 ÷ leverage figure as a ceiling, then assume the real number is smaller.

Can I lose more than I deposited?

On some products, yes — futures, forex margin, and some offshore crypto derivatives can leave a negative balance when the market gaps past your liquidation level. Regulated US securities margin accounts operate under stricter rules, and the SEC’s investor.gov explanation of margin is a reasonable starting point on how that debt works. The binding answer is in your specific account agreement’s section on deficits.

Is 2x leverage safe because the number is small?

Small compared to 100x. Not safe in absolute terms. Using the 25% maintenance example above, a 2x stock position gets a call on a 33% decline — and individual names, small caps in particular, cover that distance in a single session around an earnings miss or a failed trial readout.

Why did my margin requirement go up when I didn’t change anything?

Because the venue’s risk model widened its buffer. Exchanges raise maintenance requirements when realised or implied volatility rises, since the buffer has to survive the moves the market is currently making rather than the ones it made last quarter. It applies to open positions, it is disclosed in advance, and it says nothing about direction.

Is the math different for a short position?

The percentage arithmetic is symmetric — a 10% adverse move ends a 10x short the same way it ends a 10x long. The practical risk is not. A long’s worst case is the asset going to zero, a bounded number. A short’s adverse move has no ceiling, and that asymmetry compounds the longer the position stays open.

Does a stop-loss protect me from liquidation?

It helps, and it is not a guarantee. A stop is an instruction to send an order once a price trades; it does not promise a fill at that price. In the overnight gap scenario, your stop and your liquidation both execute somewhere well below where you set them, which is precisely the case you were trying to protect against.

What to find before you post margin

Two numbers decide how your position ends, and neither appears on the product page. The first is your venue’s maintenance margin for that specific instrument at that specific leverage. The second is its liquidation methodology — whether it closes you fully or partially, which price index it references, and what happens to a shortfall. Both live in the margin disclosure or account agreement.

Then look at how the thing you are trading has behaved on its worst days rather than its median ones. Average daily range tells you what happens on the days that do not matter. Liquidation is decided entirely by the days that do.

This article is general information, not financial advice. See our disclaimer.

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