Impermanent loss is the loss that can happen when you provide liquidity to an automated market maker (AMM) and the prices of your deposited tokens move relative to each other. Your liquidity position may become worth less than if you had simply held the same tokens in your wallet.

The loss is called “impermanent” because it can shrink or disappear if the token prices return to the same ratio as when you deposited. However, if you withdraw liquidity while the price ratio is still different, the loss becomes realized.

Impermanent loss is one of the most important risks for liquidity providers in DeFi. Trading fees can offset it, but they do not always cover the loss, especially in volatile token pairs.

How Does Impermanent Loss Happen?

Impermanent loss comes from how AMM liquidity pools rebalance token ratios. In a standard 50/50 pool, the pool must keep both sides of the pair in balance by value. When one token rises or falls relative to the other, arbitrage traders trade against the pool until its price matches the broader market.

This process changes the tokens you effectively hold. You end up with more of the token that underperformed and less of the token that outperformed.

For example:

  1. You deposit $1,000 into an ETH/USDC pool when ETH is $2,000. This means you deposit 0.25 ETH and 500 USDC.
  2. ETH rises to $4,000. Arbitrage traders rebalance the pool until the ETH/USDC pool price matches the market.
  3. Your liquidity position now holds roughly 0.177 ETH and 707 USDC, worth about $1,414.
  4. If you had simply held 0.25 ETH and 500 USDC, your wallet would be worth $1,500.
  5. The difference, about $86, is impermanent loss. In this example, it is roughly 5.7% compared with simply holding.

The larger the price divergence between the two assets, the larger the impermanent loss.

How Large Can Impermanent Loss Get?

Impermanent loss grows as the price ratio between the two assets moves further away from the original deposit ratio. It does not matter whether one token rises or the other falls. What matters is the relative price change.

Common examples include:

  • 1.25x price change: About 0.6% impermanent loss.
  • 2x price change: About 5.7% impermanent loss.
  • 5x price change: About 25.5% impermanent loss.
  • 10x price change: About 42.5% impermanent loss.

This is why volatile asset pairs can be risky for liquidity providers. A pool may show attractive fee APY, but large price moves can still make the position worse than simply holding the tokens.

Which Pools Have the Lowest Impermanent Loss Risk?

Impermanent loss risk depends mainly on how closely the two tokens move together. The more correlated the assets are, the lower the risk.

  1. Stablecoin Pools: Pools such as USDC/USDT or DAI/USDC usually have low impermanent loss because both assets are designed to stay close to $1. These pools may still carry depeg or smart contract risk, but price divergence is usually smaller.
  2. Correlated Asset Pools: Pairs such as ETH/stETH or WBTC/BTC-related assets usually have lower impermanent loss because both tokens are expected to move together. These pools are common for users who want fee income without taking large relative price risk.
  3. Volatile Pair Pools: Pairs such as ETH/LINK, SOL/ARB, or token/stablecoin pools carry higher impermanent loss risk. These pools may offer higher fees, but they also require stronger price and volume assumptions to remain profitable.

How Can Liquidity Providers Manage Impermanent Loss?

Impermanent loss cannot be fully removed in standard AMM pools, but liquidity providers can reduce the risk through pool selection, fee monitoring, and position management.

  1. Choose Lower-Risk Pairs: Stablecoin pools and correlated asset pools usually have lower impermanent loss than volatile pairs.
  2. Compare Fees Against IL: Fee income should be compared with the loss versus simply holding. A high APY is not enough if price divergence is large.
  3. Use Concentrated Liquidity Carefully: In Uniswap v3-style pools, liquidity providers can choose a price range and earn more fees within that range. However, if price moves outside the range, the position stops earning fees and may become heavily exposed to one asset.
  4. Avoid Chasing High Yields Blindly: Very high LP yields often reflect higher risk, lower liquidity, volatile tokens, or unsustainable incentives.
  5. Monitor Positions Regularly: Impermanent loss changes as prices move. LP positions should be reviewed, especially during high-volatility periods.

Is Impermanent Loss Always Bad?

Impermanent loss is not always a reason to avoid liquidity pools. It is a cost that needs to be compared against trading fees, incentives, and the user’s market view.

A liquidity position can still be profitable if fee income and token incentives exceed the loss from price divergence. This is more likely in pools with high trading volume, stable or correlated assets, and sustainable fee demand. However, if rewards depend mainly on token emissions rather than real trading volume, the apparent yield may not be durable.

For long-term holders, the real comparison is not “did I earn fees?” but “am I better off than if I had simply held the tokens?”

Summary

Impermanent loss is the main hidden risk of providing liquidity to AMM-based DeFi pools. It happens when the price ratio between deposited tokens changes, causing the liquidity position to underperform a simple hold strategy.

The risk is lowest in stablecoin or correlated asset pools and highest in volatile token pairs. Trading fees can offset impermanent loss, but they do not guarantee profit. Before providing liquidity, users should compare expected fee income, token incentives, price volatility, and the opportunity cost of simply holding the assets.

Risk Reminder: Impermanent loss is a structural feature of AMM liquidity pools. It becomes realized if you withdraw while token prices remain different from your original deposit ratio. Smart contract risk, token depegging, low liquidity, and unsustainable reward emissions can also affect LP returns.

Related Concepts

  1. What Is an AMM?
  2. What Is Liquidity?
  3. What Is DeFi?
  4. What Is a Decentralized Exchange (DEX)?

Further Reading

  1. What Is an Automated Market Maker (AMM)?
  2. What Are Market Makers? Understanding Their Role in Crypto Markets
  3. What Is DeFi (Decentralized Finance)? 8 Types of DeFi Protocols to Know
  4. What Is Liquidity Mining? A Guide to Earning Passive Income as a Liquidity Provider