AMM (Automated Market Maker)
An Automated Market Maker, or AMM, is a system used by decentralized exchanges to price assets and process trades using algorithms and liquidity pools instead of a traditional order book.
✦ Key Insight
AMMs are one of the most important innovations in decentralized finance. They allow users to swap tokens directly from their wallets without needing a centralized exchange. For traders, AMMs affect slippage, token pricing, and execution. For liquidity providers, they create fee-earning opportunities.
✕ Common Misconceptions
Traders often assume AMM pricing works like centralized exchange pricing. Others ignore slippage on large trades. Liquidity providers sometimes join AMM pools without understanding impermanent loss or smart contract risk.
Detailed Explanation
How It Works
In a traditional exchange, buyers and sellers place orders that match in an order book. In an AMM, trades happen against a liquidity pool. A formula adjusts prices based on the balance of the assets in that pool. As one token is bought, its relative price changes according to the pool’s design.
FAQs
Are AMMs better than order books?
They are different. AMMs are great for decentralized trading, but order books may offer better precision in some markets.
Why do AMMs need liquidity pools?
Because the pools are the source of the assets being traded.
Can AMMs support small tokens?
Yes, which is one reason they became popular in DeFi.
In Practice
Dig Deeper
Slippage
The difference between the expected price of a trade and the actual executed price, usually due to volatility or low liquidity.
Liquidity Pool
A liquidity pool is a collection of crypto assets locked in a smart contract that allows users to trade tokens on decentralized exchanges without relying on a traditional order book.
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