Impermanent loss: what to check before providing liquidity

Impermanent loss can leave you with less value than holding the same tokens, so check how a pool changes your holdings before you provide liquidity. It happens when the tokens’ prices move at different rates: the pool rebalances your share as traders swap, often leaving you with less of the token that rose and more of the one that fell. Fees may make up the difference, but they do not guarantee a better return.

For a basic two-token pool, picture depositing equal values of two assets. If one asset rises against the other, traders buy it from the pool, which shifts your share toward the asset that has fallen. The loss is measured against holding your original tokens, not against the value of your deposit at the start. To see how a Base Swap pool works, read this guide to Base Swap liquidity pools. The same comparison helps when weighing any pool: what might your tokens be worth if you simply held them?

When does impermanent loss happen?

It happens when the relative price of the tokens changes while your liquidity is in the pool. The greater the change, the greater the gap can be between your pool share and the value of holding your original amounts. If prices return to their starting ratio before you withdraw, that gap can shrink. But “impermanent” does not mean temporary: once you withdraw, the value difference is part of your result.

The pool’s design also matters. A traditional full-range pool adjusts your token mix across a broad range of prices. A concentrated-liquidity position lets you choose a narrower price range. That can put more of your capital to work near the current price, but your position can become inactive if the market moves outside your range. You may then hold mostly one token and stop earning swap fees until the price returns or you adjust the position.

Can trading fees cover the loss?

Fees can offset impermanent loss, but only if your share of fee income is large enough. Income depends on trading activity, your share of active liquidity and the pool’s fee terms. A busy pool can still disappoint if prices move sharply or competing liquidity leaves your share of fees small. Check the pool’s recent trading activity alongside its liquidity, fee rate and price range; past activity is not a promise of future income.

Compare the likely fee income with the risk of holding the pair through a price move. Two assets that tend to move together may create less divergence than a volatile token paired with a stablecoin, though a stablecoin can lose its peg. A narrow range brings another trade-off: more focused exposure near the market price, but a higher chance that the price moves beyond it.

What should you check before providing liquidity?

Decide whether you would be comfortable holding the changing mix of tokens even if fees do not cover the gap. Before depositing, check:

• How each token might move against the other, including a sharp rise or fall.
• Whether the position is full-range or concentrated, and what happens outside its range.
• The pool’s fee terms, trading activity and your share of active liquidity.
• Other risks, such as a token losing its peg, contract flaws or withdrawal costs.

For most readers who are unsure about managing a position, simply holding the tokens is the clearer choice: it avoids pool rebalancing and range management. Provide liquidity when you understand the changing token mix and think the likely fees justify that exposure. Compare your result with holding the same tokens from the same start point, rather than judging by fees earned alone.