Impermanent loss happens when the value of tokens you deposited in a liquidity pool ends up lower than the value you would have had by simply holding those same tokens. It is one of the most important forms of LP risk to understand before providing liquidity in decentralized finance (DeFi).
The loss is caused by changes in the relative prices of the assets inside the pool. The larger the price divergence, the larger the potential liquidity pool loss. Trading fees and other LP rewards can offset this gap, but they do not guarantee that providing liquidity will beat holding.
What Is Impermanent Loss?
Impermanent loss is the difference between the value of your liquidity provider position and the value of simply holding the assets you originally deposited.
Suppose you have $1,000 worth of ETH and $1,000 worth of USDC. You have two choices:
- Hold both assets in your wallet.
- Deposit the $2,000 into an ETH-USDC liquidity pool.
If ETH rises sharply, an automated market maker (AMM) continually changes the quantity of ETH and USDC in your LP position as traders swap against the pool.
You typically end up with less ETH and more USDC than you started with.
If holding your original ETH and USDC would now be worth $2,600, while withdrawing your share of the pool would be worth $2,500 before fees, your impermanent loss is $100.
That does not necessarily mean the LP strategy lost money overall. Your position may still be worth more than your initial $2,000 deposit. It simply underperformed the hold strategy by $100.
Why Does Impermanent Loss Happen?
Impermanent loss occurs because an AMM maintains a mathematical relationship between the assets in its liquidity pool.
For a traditional constant-product AMM, the basic formula is:
x × y = k
Where:
- x is the quantity of token A
- y is the quantity of token B
- k is a constant
When the market price of one token changes, arbitrage traders buy or sell assets from the pool until its price moves closer to the wider market price.
That arbitrage activity changes the composition of your LP position.
What Happens When One Token Rises?
Imagine an ETH-USDC pool.
If ETH rises elsewhere in the market while the pool still offers ETH at the old price, arbitrage traders can buy the cheaper ETH from the pool. They continue trading until the pool price adjusts.
As a liquidity provider, you are effectively selling some ETH as its price rises.
You therefore own less of the appreciating asset than someone who simply held their original tokens.
What Happens When One Token Falls?
The process works in the other direction too.
If ETH falls relative to USDC, traders can sell ETH into the pool. Your LP position ends up holding more ETH and less USDC.
In other words, an LP position naturally rebalances between its assets as their relative prices move.
That rebalancing is what creates impermanent loss compared with holding.
How Is Impermanent Loss Calculated?
For a standard 50/50 constant-product liquidity pool, impermanent loss can be estimated using:
IL = 2√r / (1 + r) – 1
Here, r is the ratio between the asset’s new price and its original price.
The result measures the LP position’s underperformance relative to holding, before accounting for trading fees or other rewards.
Impermanent Loss Example
Suppose one token starts at $100 and later reaches $200.
The price ratio is:
r = 200 / 100 = 2
Using the formula:
IL = 2√2 / (1 + 2) – 1
This gives an impermanent loss of approximately:
-5.72%
So, before fees and incentives, the LP position is worth about 5.72% less than simply holding the original assets.
Here is how price divergence affects a standard 50/50 pool:
| Price change | Price ratio | Approx. impermanent loss |
|---|---|---|
| Token rises 10% | 1.1x | 0.11% |
| Token rises 25% | 1.25x | 0.62% |
| Token rises 50% | 1.5x | 2.02% |
| Token doubles | 2x | 5.72% |
| Token triples | 3x | 13.40% |
| Token rises 4x | 4x | 20.00% |
| Token rises 5x | 5x | 25.46% |
The relationship is not linear. As the price gap gets larger, liquidity pool loss relative to holding becomes increasingly significant.
How Does an Impermanent Loss Calculator Work?
An impermanent loss calculator compares the estimated value of an LP position with the value of holding the deposited tokens.
At its simplest, you enter:
- The initial token price
- The current or expected token price
- The amount deposited
- The pool’s asset weighting
The calculator then estimates how much the LP position trails the hold strategy.
For example, if the price ratio is 3x, a basic 50/50 constant-product impermanent loss calculator would show an IL of roughly 13.4%.
What an Impermanent Loss Calculator May Not Show
A simple calculator is useful for understanding price risk, but actual LP returns can be more complicated.
Depending on the protocol and pool design, you may also need to account for:
- Trading fees earned
- Protocol incentives
- Token emissions
- Gas and transaction costs
- Pool weightings
- Concentrated liquidity ranges
- Compounding
- Changes in token prices
- Smart contract or protocol risk
For that reason, impermanent loss should not be viewed in isolation.
The more useful question is whether net LP returns exceed the return from simply holding the assets.
Why Can LP Returns Trail Simply Holding?
LP returns can trail holding because liquidity providers give up some exposure to assets that rise relative to the other assets in the pool.
Consider two investors who start with exactly the same portfolio.
Investor A holds the tokens.
Investor B provides liquidity.
If one token rallies substantially, Investor A keeps the full quantity of that token. Investor B’s position automatically sells some of it into the pool as its price rises.
Investor B earns trading fees for providing liquidity, but those fees have to compensate for the resulting impermanent loss and other costs.
LP Returns Are Not the Same as Yield
This distinction matters when looking at advertised LP yields.
A pool might display an attractive annual percentage rate (APR), but the APR does not automatically tell you whether the strategy beats holding.
A simplified comparison is:
Net LP advantage = trading fees + incentives – impermanent loss – costs
If fees and incentives exceed the liquidity pool loss and costs, the LP strategy can outperform holding.
If they do not, holding may produce the better result.
Can You Lose Money and Still Have No Impermanent Loss?
Yes.
Impermanent loss measures relative underperformance, not your total investment profit or loss.
Suppose both tokens in a pool fall heavily in value while their price relative to each other barely changes. Your portfolio could lose money in fiat terms without experiencing much impermanent loss.
The reverse can also happen.
Your LP position could rise substantially in value but still experience impermanent loss because simply holding the original tokens would have produced an even larger gain.
That is why these two questions should be separated:
Did my investment make money?
and
Did providing liquidity outperform holding?
They are not the same calculation.
Is Impermanent Loss Really “Impermanent”?
The name can be misleading.
Impermanent loss changes as the relative prices of the pooled assets change. If their relative price returns to the level at which you entered a traditional 50/50 pool, the price-related divergence can disappear.
But if you withdraw while the assets have diverged, that difference versus holding is effectively locked in.
There is also no guarantee prices will return to their original relationship.
Calling the risk “impermanent” should not be interpreted as meaning the loss will eventually disappear.
Do Trading Fees Offset Impermanent Loss?
They can, and this is central to the economics of liquidity provision.
Liquidity providers usually receive a portion of the fees generated when users trade through the pool. High trading volume relative to the amount of liquidity can generate meaningful fee income.
Suppose:
- Your calculated impermanent loss is 5.7%
- Your share of trading fees earns 8%
- Other costs total 1%
A simplified net comparison would be:
8% – 5.7% – 1% = 1.3%
Under those assumptions, LPing could still outperform holding by about 1.3%.
If fee income were only 3%, however, it would not be enough to offset the same impermanent loss.
Actual outcomes vary because prices, trading volumes, liquidity and fees continually change.
Which Liquidity Pools Have Lower Impermanent Loss Risk?
Pools containing assets that tend to maintain similar prices generally have lower impermanent loss risk than pairs whose relative prices can move dramatically.
Stablecoin Pools
A pool containing two assets designed to track the same reference value can experience relatively small price divergence during normal market conditions.
Examples include pools containing two major USD-pegged stablecoins.
However, lower impermanent loss does not mean zero risk. A stablecoin can depeg, an issuer can face problems, or a protocol can suffer a smart contract failure.
Correlated Asset Pools
Pools containing closely related assets may also experience less price divergence.
The key question is whether the two assets are likely to move together.
Volatile Token Pairs
Pairs involving two highly volatile and weakly correlated tokens can carry significantly more impermanent loss risk.
A major move in either direction changes the pool composition and can cause LP returns to trail holding substantially.
How Does Concentrated Liquidity Affect LP Risk?
Concentrated liquidity allows liquidity providers to deploy capital within a selected price range instead of across every possible price.
This can make capital more productive while the market trades inside your chosen range. It also introduces additional complexity.
If the market moves toward one side of your range, your position becomes increasingly concentrated in one asset. If the price moves completely outside the range, the position can become entirely composed of one asset and stop earning trading fees until the price returns to the active range.
This makes range selection and active management important parts of LP risk.
A simple 50/50 impermanent loss calculator may therefore be inadequate for concentrated liquidity positions.
What Are the Main Risks of Providing Liquidity?
Impermanent loss is only one risk associated with liquidity pools.
| LP risk | What it means |
|---|---|
| Impermanent loss | LP position underperforms simply holding the deposited assets |
| Token price risk | One or both assets lose market value |
| Smart contract risk | Bugs or exploits affect the protocol |
| Stablecoin depeg risk | An asset loses its intended peg |
| Concentration risk | A position becomes heavily exposed to one asset |
| Range risk | Concentrated liquidity moves outside its active range |
| Incentive risk | Reward-token emissions fall or rewards lose value |
| Gas costs | Transaction costs reduce net returns |
| Protocol risk | Governance, oracle, economic or operational failures affect funds |
A high advertised APR should therefore be evaluated alongside the risks required to earn it.
How Can You Reduce Impermanent Loss?
You cannot eliminate impermanent loss from every LP strategy, but you can manage your exposure.
1. Understand the Pair Before Depositing
Look at how the two assets have historically moved relative to each other.
A pool pairing assets with dramatically different risk profiles may experience substantial price divergence.
2. Model Different Price Scenarios
Use an impermanent loss calculator before depositing.
Instead of calculating only today’s prices, test several possibilities, such as:
- Token rises 25%
- Token rises 50%
- Token doubles
- Token falls 50%
- Extreme upside or downside scenarios
This shows how sensitive the LP position may be to price movement.
3. Compare Expected Fees With Potential Loss
A high-volume pool can generate more fees, but past trading activity does not guarantee future revenue.
Compare realistic fee expectations with possible impermanent loss rather than relying on headline APR alone.
4. Understand the AMM Design
Not every liquidity pool follows the classic 50/50 constant-product model.
Different protocols can use:
- Unequal asset weights
- Stable-swap curves
- Concentrated liquidity
- Multiple assets
- Dynamic fees
The appropriate risk calculation depends on the actual pool mechanics.
5. Include Every Cost
Gas, rebalancing, claim transactions and other costs can turn an apparently profitable strategy into an underperforming one.
Focus on net returns, not just gross yield.
When Might Providing Liquidity Make Sense?
Liquidity provision can make sense when the expected compensation for supplying capital is attractive relative to the risks involved.
That may occur when:
- The pool generates substantial trading volume
- Fee income is strong relative to deposited liquidity
- The assets have relatively low expected price divergence
- Incentives provide additional compensation
- You understand and accept the pool’s smart contract and token risks
Providing liquidity should therefore be viewed as a strategy with its own return drivers, not simply as “holding tokens plus earning yield.”
Impermanent Loss vs Holding: A Simple Comparison
| Simply holding | Providing liquidity |
|---|---|
| Keeps original token quantities | Token quantities change as trades occur |
| Gets full exposure to price appreciation | May sell some of the outperforming asset |
| Does not earn AMM trading fees | Can earn trading fees |
| No impermanent loss | Exposed to impermanent loss |
| No LP smart contract exposure | Adds protocol and smart contract risk |
| Usually simpler to manage | May require monitoring and rebalancing |
Neither strategy automatically produces higher returns.
The outcome depends on price movements, trading activity, fees, incentives, costs and the structure of the liquidity pool.
FAQs About Impermanent Loss
What is impermanent loss in simple terms?
A. Impermanent loss is the amount by which a liquidity pool position underperforms simply holding the same tokens. It occurs when the relative prices of the deposited assets change.
Does impermanent loss mean I actually lost money?
A. Not necessarily. Your LP position can be profitable in absolute terms while still experiencing impermanent loss. It means you would have been better off holding the original assets, before accounting for LP fees and rewards.
How much impermanent loss occurs if a token doubles?
A. In a traditional 50/50 constant-product pool, a 2x change in the relative price of one asset produces approximately 5.72% impermanent loss before fees.
Can impermanent loss go away?
A. It can decrease or disappear if the assets’ relative price returns to its original level under a standard AMM model. There is no guarantee this will happen, and withdrawing while prices remain divergent effectively realizes the difference versus holding.
Can trading fees cover impermanent loss?
A. Yes. If accumulated trading fees and other rewards exceed impermanent loss and costs, providing liquidity can outperform holding. Fees are variable, so this outcome is not guaranteed.
Are stablecoin pools free from impermanent loss?
A. No. Stablecoin pools can have relatively low impermanent loss while their assets maintain similar values, but depegging can create substantial divergence. They also carry smart contract, issuer and protocol risks.
Is an impermanent loss calculator accurate?
A. It can accurately model a specified AMM formula and price scenario, but a basic calculator may not reflect trading fees, incentives, concentrated liquidity, transaction costs or more complex pool designs.
What is the biggest risk for liquidity providers?
A. There is no single biggest risk for every pool. LPs can face impermanent loss, token price declines, smart contract exploits, depegging, range risk and declining fee revenue. The relevant risks depend on the assets and protocol.
Key Takeaways
- Impermanent loss measures how much an LP position underperforms simply holding the deposited tokens.
- It is caused by changes in the relative prices of assets inside a liquidity pool.
- A 2x relative price change produces about 5.72% impermanent loss in a standard 50/50 constant-product pool, before fees.
- Impermanent loss does not automatically mean your investment lost money overall.
- Trading fees and incentives can offset liquidity pool loss, but they do not guarantee LP outperformance.
- An impermanent loss calculator is useful for scenario analysis, but it must match the pool’s actual AMM design.
- LP risk also includes token losses, smart contract failures, depegging, range risk and transaction costs.
- The most meaningful comparison is your net LP return versus the return from simply holding the same assets.
