Impermanent Loss Explained: The Hidden Risk of Liquidity Provision

Written by Uvin Vindula (IAMUVIN) — Last updated January 2026

Introduction

If you have ever looked into providing liquidity on a decentralized exchange like Uniswap or SushiSwap, you have probably encountered the term impermanent loss. It is arguably the most important concept to understand before becoming a liquidity provider (LP), yet it is one of the most commonly misunderstood.

Impermanent loss is the difference in value between holding tokens in a liquidity pool versus simply holding them in your wallet. Despite its name, the loss can very much become permanent — and it has cost uninformed liquidity providers significant amounts of money.

How Liquidity Pools Work (Quick Recap)

Before diving into impermanent loss, let us briefly review how automated market maker (AMM) liquidity pools work:

1. A liquidity pool contains two tokens (e.g., ETH and USDC) in a specific ratio.
2. The pool uses a mathematical formula (typically x * y = k, known as the constant product formula) to determine prices.
3. When traders swap tokens, they change the ratio of tokens in the pool, which adjusts the price.
4. Liquidity providers earn a share of trading fees proportional to their share of the pool.

What is Impermanent Loss?

Impermanent loss occurs when the price ratio of the tokens in your liquidity pool changes compared to when you deposited them. The greater the price divergence, the greater the impermanent loss.

Here is the key insight: the AMM formula constantly rebalances your position. As one token increases in price, the pool sells some of it for the other token. This means you end up with more of the token that decreased in value and less of the token that increased in value — the exact opposite of what you would want.

Impermanent Loss Example with Real Numbers

Let us walk through a concrete example:

Starting Position

• You deposit 1 ETH and 2,000 USDC into an ETH/USDC pool (ETH price = $2,000)
• Your total deposit value: $4,000
• You own 10% of the pool

Scenario: ETH Price Doubles to $4,000

Due to the constant product formula, the pool rebalances. After arbitrageurs bring the pool price in line with the market, your 10% share now represents approximately:

• 0.707 ETH (worth $2,828) + 2,828 USDC
• Total value: $5,656

If You Had Just Held Instead

• 1 ETH (worth $4,000) + 2,000 USDC
• Total value: $6,000

The Impermanent Loss

• Difference: $6,000 - $5,656 = $344
• Impermanent loss: approximately 5.7%

You still made money overall ($5,656 vs your original $4,000), but you made $344 less than if you had simply held the tokens. That $344 is your impermanent loss.

Impermanent Loss at Various Price Changes

Note: These losses apply equally whether the price goes up or down by the same ratio.

When Does Impermanent Loss Become Permanent?

The loss is called "impermanent" because if the price ratio returns to its original state, the loss disappears. However, the loss becomes permanent when:

• You withdraw your liquidity while the price ratio has diverged
• The price never returns to the original ratio (which is common with volatile tokens)
• One token in the pair crashes to near zero (e.g., in a rug pull or token collapse)

In the TerraLUNA collapse, liquidity providers in LUNA-paired pools suffered catastrophic losses as LUNA went to near zero. The impermanent loss became very real and very permanent.

Strategies to Manage Impermanent Loss

1. Choose Correlated Pairs

Providing liquidity to pools where both tokens tend to move in the same direction reduces impermanent loss. Examples include:

• Stablecoin pairs (USDC/USDT, USDC/DAI)
• Liquid staking derivatives (stETH/ETH)
• Wrapped token pairs

2. Focus on High-Fee Pools

Trading fees earned from the pool can offset impermanent loss. High-volume pools with higher fee tiers (like Uniswap's 1% fee tier for volatile pairs) can generate enough fees to compensate.

3. Use Concentrated Liquidity Carefully

Uniswap v3 and v4 allow concentrated liquidity — providing liquidity within specific price ranges. This amplifies both fee earnings AND impermanent loss. It requires active management and is more suitable for experienced LPs.

4. Factor in Token Incentives

Some protocols offer liquidity mining rewards that can offset impermanent loss. However, be cautious — if the reward token loses value, this offset disappears.

5. Consider Single-Sided Liquidity

Some newer protocols offer single-sided liquidity provision, which reduces or eliminates impermanent loss exposure. However, these come with their own trade-offs.

Calculating Impermanent Loss

The formula for impermanent loss is:

IL = 2 * sqrt(price_ratio) / (1 + price_ratio) - 1

Where price_ratio = new_price / original_price

You can use DeFi calculators available on our tools page to model impermanent loss for specific scenarios before providing liquidity.

Should You Provide Liquidity?

Providing liquidity can be profitable, but only if:

• The trading fees earned exceed the impermanent loss
• Any additional token incentives maintain their value
• You understand and accept the risks involved
• You actively monitor and manage your positions

Conclusion

Impermanent loss is a fundamental concept that every DeFi user must understand before providing liquidity. The alluring APY figures displayed on DeFi dashboards often do not account for impermanent loss, painting an incomplete picture of real returns.

Before depositing tokens into any liquidity pool, calculate the potential impermanent loss at various price points, compare it against expected fee earnings, and make sure you are comfortable with the worst-case scenario. Visit our learning resources for more DeFi education and tools for impermanent loss calculators.