What is a liquidity pool?
A liquidity pool (LP) is a smart contract holding paired token reserves that enable automated, peer-to-contract trading on decentralised exchanges (DEXs). Instead of order books, traders swap against the pool, and prices are set algorithmically by the pool’s bonding curve. Liquidity providers (LPs) deposit token pairs in fixed ratio and earn a share of trading fees and (often) additional protocol token incentives.
How LPs work — Uniswap v2 constant product
- Constant product formula: x · y = k. Reserves x and y multiply to a constant; trades shift the ratio and price.
- Slippage: larger trades vs. pool size move price more.
- LP tokens: depositors receive ERC-20 LP tokens representing their pool share, redeemable for underlying assets plus accumulated fees.
- Concentrated liquidity (Uniswap v3): LPs choose price ranges, increasing capital efficiency but exposing to inactive ranges.
Impermanent loss
When pool token prices diverge from deposit ratio, LP value can underperform vs. simply holding the assets — known as impermanent loss. The loss is “impermanent” because it reverses if prices revert; it crystallises on withdrawal. LPs earn fees as compensation; net return depends on fees-vs-divergence ratio.
Türk yatırımcı/CASP bağlamı
Türkiye’de 7518 sayılı Kanun (2024) ile CASP’lerin SPK denetimine girmesi, kripto piyasasının kurumsal çerçevesini şekillendirmiştir. LP katılımı bireysel yatırımcı için yüksek teknik bilgi ve impermanent loss riski içerir; vergi açısından TCMB ve GİB henüz net rehber yayınlamamış olsa da kripto kazançlarının vergilendirilmesi yaklaşan düzenleyici gündemdedir.
Do: understand impermanent loss math before providing liquidity; prefer well-audited protocols (Uniswap, Curve, Balancer); monitor pool TVL and volume.
Don’t: chase APY without checking smart contract audit history — rug pulls and exploits remain frequent in long-tail DeFi.