Why an impermanent loss stays impermanent only if you never leave

A liquidity provider was reassured by the term impermanent loss, hearing that any loss from providing liquidity was temporary and would recover. The loss is called impermanent because it exists on paper while prices are diverged and would vanish if prices returned to their starting ratio. But it becomes fully permanent the moment the provider withdraws at a diverged price — which is when most people leave. The comforting word describes a best case that exit destroys.

What everyone sees

A provider hears impermanent and reads temporary and self-correcting: whatever is lost now will come back, so there is nothing to fear. The word promises reversibility. The provider treats the loss as a passing dip that patience cures, and feels safe supplying liquidity, without registering that the impermanence is conditional on prices returning exactly and on never withdrawing meanwhile.

What is actually happening

Impermanent loss is the gap between holding assets and pooling them when their relative price moves, and it is only unrealised — impermanent — while the position is open and prices remain diverged. Research on automated market makers shows it crystallises into a realised loss at withdrawal, and that providers frequently exit precisely when divergence, and thus the loss, is largest. The name describes the paper state, not the outcome that withdrawal typically locks in.

Why it stays hidden

The hidden mechanism is a label that describes the reversible case and quietly names the whole phenomenon after it. Impermanent frames a conditional, best-case reversibility as the essential nature of the loss, suppressing the far more common permanent outcome at exit. The word does the reassuring while the realised loss, which arrives on withdrawal, hides behind the promise of impermanence.