You deposit $1,000 of ETH and USDC into a liquidity pool, earn fees for a month, withdraw — and somehow have less than if you’d just held the tokens. That shortfall has a name: impermanent loss. It’s the hidden cost of providing liquidity, and understanding it is non-negotiable before you deposit into any pool.
This guide explains what impermanent loss is, when it bites hardest, and why it’s called “impermanent.”
id=”what-impermanent-loss-is”>What Impermanent Loss Is
When you provide liquidity to an AMM pool, you deposit two tokens in equal value. As traders swap, the pool automatically rebalances — selling the token that’s rising in price and buying the one that’s falling. When you withdraw, you get back a different mix than you put in.
Impermanent loss is the difference between the value of what you withdrew and what you’d have if you’d simply held both tokens in your wallet. Example: you deposit $500 of ETH + $500 USDC and ETH doubles. The pool sells your ETH as it rises, so you withdraw ~$1,400 — versus $1,500 from holding. That $100 gap is impermanent loss; fees only partly offset it.
When It Bites Hardest
Impermanent loss grows with price divergence. Stablecoin-to-stablecoin pools (USDC/DAI) have almost none, since prices barely move relative to each other — but they also pay the lowest fees. Volatile pairs (a new token against ETH) can produce brutal impermanent loss that dwarfs the fee income.
It’s called “impermanent” because if prices return to exactly where they started before you withdraw, the loss disappears. In practice, prices rarely round-trip — so treat the loss as permanent unless you have a reason to expect reversion.
Ways to Reduce the Risk
Choose pairs whose prices move together (correlated assets or stablecoins), prefer pools with real trading volume (fees are your only compensation), and avoid depositing into pools for tokens you wouldn’t happily hold outright — because in a crash, you’ll end up holding more of the loser.
Some protocols offer concentrated liquidity or single-sided deposits that change the math, but none eliminate the core trade-off: providing liquidity means systematically selling winners. Go in with eyes open, start small, and track your position against a simple “what if I’d held” benchmark.
The Bottom Line
Impermanent loss is the quiet tax on liquidity providers: the pool sells your winners as prices move, leaving you worse off than holding. Fees can compensate in calm markets — but in volatile ones, they rarely do.
This guide is for education only — not financial advice.
