In the cryptocurrency market, many users provide liquidity through decentralized exchanges (DEXs) to earn trading fees and other rewards. However, providing liquidity does not necessarily guarantee stable returns. One of the key risks that liquidity providers need to understand is impermanent loss.
So, what is impermanent loss? Why does providing liquidity create impermanent loss? How is impermanent loss calculated? Is impermanent loss really temporary? This article provides a detailed overview of the concept, causes, calculation methods, and risk management strategies related to impermanent loss.
What Is Impermanent Loss?
Impermanent loss occurs when a user deposits two or more crypto assets into a liquidity pool and the prices of those assets change. Compared with simply holding the same assets, the liquidity provider's final asset portfolio may have a lower value.
In simple terms, if you simply hold BTC and USDT without providing liquidity, you can fully benefit from an increase in BTC's price.
However, if you deposit BTC and USDT into an AMM liquidity pool, the changing price ratio between BTC and USDT causes the automated market maker mechanism to continuously adjust the proportion of assets in the pool. As a result, the amount of BTC and USDT you hold may change.
If you withdraw your liquidity at that point and the total value of your assets is lower than what you would have had by simply holding BTC and USDT from the beginning, the difference is known as impermanent loss.
It is important to note that impermanent loss does not necessarily mean that a liquidity provider will lose money. Trading fees, liquidity mining rewards, and other returns may offset or even exceed the impermanent loss.
Why Does Impermanent Loss Occur?
The main reason for impermanent loss is a change in the price ratio between assets in a liquidity pool.
Traditional exchanges generally match buyers and sellers through order books, while many decentralized exchanges use an automated market maker (AMM) mechanism. Under the classic constant product model, a liquidity pool generally follows:
x × y = k
Where:
x represents the amount of the first asset;
y represents the amount of the second asset;
k represents the constant product.
When traders continuously buy or sell one of the assets, the quantities of the two assets in the pool automatically change to maintain the market price.
Therefore, when the price of one asset rises or falls significantly, the proportion of assets ultimately held by liquidity providers also changes.
A Simple Example of Impermanent Loss
Suppose you have $10,000 worth of funds.
Of this amount:
$5,000 is used to purchase ETH;
$5,000 remains in USDT.
Suppose the price of ETH is $2,000, so you hold 2.5 ETH.
If you simply hold these assets and ETH later rises to $4,000, your ETH position is worth:
2.5 ETH × $4,000 = $10,000
Adding the $5,000 USDT:
Total value = $15,000.
However, if you deposit the 2.5 ETH and $5,000 USDT into an ETH/USDT liquidity pool, arbitrage traders will continuously adjust the asset ratio in the pool as the price of ETH rises.
When ETH reaches $4,000, the amount of ETH you own through the liquidity pool will decrease, while the amount of USDT will increase.
As a result, the total value of the assets you receive when withdrawing from the liquidity pool may be lower than the value of simply holding ETH and USDT.
This difference is the impermanent loss.
How Is Impermanent Loss Calculated?
Impermanent loss can generally be estimated based on the ratio of the asset price change.
Suppose the price change ratio of one asset relative to another is:
r = New Price ÷ Initial Price
For a classic 50/50 liquidity pool, the impermanent loss ratio can be expressed as:
IL = 2√r ÷ (1+r) - 1
For example, if the price of ETH doubles relative to the other asset:
r = 2
Then:
IL ≈ 2√2 ÷ 3 - 1
The resulting impermanent loss is approximately -5.72%.
This means that, excluding trading fees and other rewards, the liquidity provider's asset portfolio is worth approximately 5.72% less than simply holding the assets.
It is important to note that this is a theoretical impermanent loss percentage. Actual returns also depend on the specific liquidity pool mechanism, trading fee income, rewards, and the prices when funds are deposited and withdrawn.
How Much Impermanent Loss Occurs at Different Price Changes?
For a classic 50/50 liquidity pool, the potential impermanent loss can be roughly understood based on the price change ratio:
Price ChangeTheoretical Impermanent LossPrice increases 1.25×Approximately -0.62%Price increases 1.5×Approximately -2.02%Price increases 2×Approximately -5.72%Price increases 3×Approximately -13.40%Price increases 4×Approximately -20.00%Price increases 5×Approximately -25.46%Price decreases 50%Approximately -5.72%Price decreases 75%Approximately -20.00%
The table shows that the greater the asset price change, the more significant the potential impermanent loss generally becomes.
Why Is It Called “Impermanent” Loss?
It is called impermanent loss because as long as the liquidity provider does not withdraw liquidity, the loss does not necessarily become permanent.
For example, after you provide liquidity, the price of ETH may rise significantly, causing the asset ratio in the liquidity pool to change.
If the price of ETH later returns to the level it was at when you initially provided liquidity, the theoretical impermanent loss may return to zero.
However, if you withdraw your liquidity while the asset price remains significantly different from the initial price, the difference may become a realized loss.
Therefore, “impermanent” does not mean that there is no risk. It means that whether the loss is ultimately realized depends on asset price changes and when you withdraw your liquidity.
Does Impermanent Loss Always Mean Losing Money?
Not necessarily.
This is an important point when understanding impermanent loss.
The actual return earned by a liquidity provider can generally be understood as:
Actual Return = Trading Fees + Liquidity Rewards - Impermanent Loss - Other Costs
For example, if a liquidity pool generates a 5% impermanent loss but earns 8% in trading fees and rewards during the same period, the overall position may still generate a positive return.
Conversely, if a liquidity pool has low trading volume and generates only 1% in fee income while one of the assets experiences significant price volatility, the impermanent loss may exceed the fee income and result in an overall loss.
Therefore, users should not evaluate a liquidity pool solely based on APY or fee income. The potential impermanent loss should also be considered.
When Is Impermanent Loss More Severe?
Both Assets Are Highly Volatile
If the prices of both assets in a liquidity pool frequently experience significant fluctuations, the risk of impermanent loss is generally higher.
For example, trading pairs such as ETH/USDT and SOL/USDC may experience significant price divergence during periods of rapid market growth or decline.
The Two Assets Have Low Price Correlation
When the price movements of two assets differ significantly, impermanent loss is generally more pronounced.
For example, when a highly volatile token is paired with a stablecoin, a sharp increase or decrease in the token's price can cause a substantial change in the asset ratio within the pool.
The Market Moves Strongly in One Direction
If one asset continues to rise while the other remains relatively stable, the AMM continuously adjusts the asset ratio within the pool.
In this situation, liquidity providers may gradually hold less of the appreciating asset and more of the other asset, preventing them from fully benefiting from the appreciating asset's price increase.
Can Stablecoin Trading Pairs Also Have Impermanent Loss?
Yes, but it is generally lower.
For example, in stablecoin pairs such as USDT/USDC, both assets typically trade around $1, so the price ratio usually changes only slightly.
As a result, the theoretical impermanent loss is generally limited.
However, stablecoins are not completely risk-free. If one stablecoin loses its peg, causing its price to deviate significantly from $1, liquidity providers may still face substantial impermanent loss.
Therefore, stablecoin liquidity pools also require attention to depeg risk, protocol risk, and smart contract risk.
How Can You Reduce Impermanent Loss?
Choose Assets With Higher Price Correlation
Choosing assets with highly correlated price movements can reduce the probability of significant changes in their relative price ratio.
For example, trading pairs consisting of similar assets or assets with high price correlation generally have lower impermanent loss risk than pairs consisting of a highly volatile asset and a stablecoin.
Consider Stablecoin Trading Pairs
If your investment objective is more focused on relatively stable returns, stablecoin trading pairs may be worth considering.
Because stablecoins such as USDT and USDC generally maintain relatively stable prices, their price ratios tend to fluctuate less, resulting in relatively low theoretical impermanent loss.
However, stablecoin depeg risk as well as platform and protocol risks should still be considered.
Choose Liquidity Pools Carefully
Do not focus solely on APY.
A liquidity pool with a very high APY may indicate higher asset volatility, greater trading-pair risk, or significant price volatility in the reward token itself.
Before providing liquidity, consider factors such as:
Trading volume;
Fee rate;
Historical APY;
TVL;
Asset price volatility;
Correlation between the trading pair assets;
Protocol security;
Smart contract risk.
Pay Attention to Trading Fee Income
Impermanent loss alone does not determine the final investment result.
If a liquidity pool has high real trading volume, the fees earned by LPs may help offset impermanent loss.
Therefore, when evaluating a liquidity mining opportunity, it is important to consider whether the fee income is sufficient to cover the potential impermanent loss.
What Is the Difference Between Impermanent Loss and Simply Holding Assets?
For users who simply hold assets, returns mainly come from asset price appreciation.
For liquidity providers, the sources of returns are more complex:
Asset price changes;
Trading fees;
Liquidity mining rewards;
Impermanent loss;
Gas fees;
Other protocol fees.
Therefore, being an LP is not simply the same as “holding two coins.”
When market prices change, the AMM automatically adjusts the asset ratio in the pool. This is why liquidity providers may not achieve the same returns as users who simply hold the assets.
Should Beginners Pay Attention to Impermanent Loss?
If you are new to DeFi, impermanent loss is an important fundamental concept to understand.
Many new users see liquidity pools offering APYs of 20%, 50%, or even higher and assume that the returns must be better than simply holding the assets.
In reality, a high APY does not necessarily mean low risk.
If asset prices change significantly over a short period, even relatively high trading fee income and rewards may not be enough to fully offset impermanent loss.
Before providing liquidity, beginners should understand at least three questions:
First, what are the two assets in the pool?
Second, what happens if the price of one asset rises or falls significantly?
Third, are the expected trading fees and rewards sufficient to cover the potential impermanent loss?
What Is the Relationship Between Impermanent Loss and Trading?
Impermanent loss primarily occurs when providing liquidity through AMM-based protocols and is not a standard concept in traditional spot trading.
If users simply trade spot assets through a centralized exchange, they generally do not incur impermanent loss because they are not providing liquidity.
However, users who participate in DEXs, liquidity mining, or DeFi protocols should pay close attention to this risk.
For users who want to participate in spot trading, futures trading, and other types of crypto activities, understanding impermanent loss can help distinguish between trading returns and liquidity-provision returns.
Conclusion: How Should You Understand Impermanent Loss?
At its core, impermanent loss is the potential difference in value that occurs when the price ratio between two assets in a liquidity pool changes, compared with simply holding those assets.
It does not necessarily mean that the investor will ultimately lose money, because trading fees and liquidity rewards can offset impermanent loss.
When evaluating whether a liquidity pool is worth participating in, users should not look only at APY. They should also consider asset volatility, trading volume, fees, TVL, asset correlation, and protocol security.
For crypto investors, understanding impermanent loss before participating in DeFi liquidity mining is an important part of effective risk management.
HiBT users who wish to participate in different types of crypto investments should also choose appropriate trading and asset management methods based on their individual risk tolerance. Investment decisions should not be based solely on historical returns or a single metric.