Impermanent Loss

AMMs, lending, yield, impermanent loss, and self-custodial finance.

Updated Jun 22, 2026Reviewed by GaiaEx Academy Editorial

In this lesson

What impermanent loss is
Why it's 'impermanent'

Key takeaways

1IL happens when pooled prices diverge vs holding
2It shrinks if prices return to the original ratio
3Fees must outweigh IL for LPs to profit

Lesson summary

Impermanent loss is the opportunity cost of providing liquidity when pooled asset prices diverge.

Mental model

The core idea behind impermanent loss

Impermanent loss is the opportunity cost of providing liquidity when pooled asset prices diverge. It compares the LP position against simply holding the assets.

Treat impermanent loss as a tool for making a decision, not a term to memorise for its own sake.

What impermanent loss is
Why it's 'impermanent'

Mechanics

How to reason about impermanent loss

AMM formulas rebalance the pool as traders arbitrage price changes.

The LP ends up holding more of the underperforming asset and less of the outperforming asset.

Fees can offset the loss, but only if volume and fee income are strong enough.

The reason these steps matter in practice is simple: iL happens when pooled prices diverge vs holding.

IL happens when pooled prices diverge vs holding
It shrinks if prices return to the original ratio
Fees must outweigh IL for LPs to profit

Example

Impermanent Loss in practice

If ETH rises sharply against USDC, an ETH/USDC LP has less ETH than they would have had by just holding the original assets.

If the example only works with these exact details, you have memorised a case rather than learned impermanent loss.

Ask what you would need to see on screen or on chain to trust a impermanent loss outcome before you act on it.

RememberDecision rule: Enter LP positions only when expected fees justify the price-divergence risk.

Common mistakes

Common mistakes with impermanent loss

The word impermanent can mislead users. The loss is only reduced if prices return or fees compensate; otherwise it is economically real.

Catch the impermanent loss version early by asking which evidence would prove the claim, then actually looking for it.

Most costly impermanent loss errors are not exotic; they are this ordinary shortcut repeated under time pressure.

Risk notes

Staying safe around impermanent loss

High volatility, low fees, concentrated liquidity ranges, and thin pool activity can increase LP underperformance.

Risk in impermanent loss grows when markets move fast, liquidity thins, or an interface hides the warning that actually matters.

None of this means avoid impermanent loss; it means using it with eyes open and a clear exit if you are wrong.

Compare LP result with holding.
Estimate fee offset.
Understand what happens if one asset trends hard.

Practice

Practise impermanent loss before moving on

Practise Impermanent Loss on something real — a product page, a chart, a transaction, or a headline tied to DeFi Deep Dive.

Aim for impermanent loss judgement you can defend, not a tidy summary you can merely recite.

Compare LP result with holding.
Estimate fee offset.
Understand what happens if one asset trends hard.

Review

Key terms

Arbitrage: Profiting from the same asset trading at different prices across markets by buying low and selling high simultaneously.
DeFi: Decentralized Finance — permissionless, composable financial services built on smart contracts.
Impermanent Loss: The loss a liquidity provider faces when pooled asset prices diverge versus simply holding them.
Liquidity: How easily an asset can be bought or sold without moving its price much.
Volatility: How sharply a price swings over time — higher volatility means higher risk and opportunity.

Source notes