AMM (Automated Market Maker)
By Menno van Ravels - 13 years in crypto, 3 bear markets survived, zero paid promotions
AI Quick Summary: AMM (Automated Market Maker) Summary
Term
AMM (Automated Market Maker)
Category
DeFi
Definition
An AMM is a type of decentralized exchange that uses mathematical formulas and liquidity pools instead of traditional order books to price and execute trades.
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An AMM is a type of decentralized exchange that uses mathematical formulas and liquidity pools instead of traditional order books to price and execute trades. Uniswap popularized the AMM model with its x*y=k formula. According to Dune Analytics, Uniswap alone has processed over $2 trillion in cumulative trading volume since its 2018 launch.
An Automated Market Maker (AMM) is the mechanism underlying most decentralized exchanges. Instead of matching buyers with sellers (like a traditional order book exchange), AMMs use liquidity pools and mathematical formulas to determine prices automatically.
The core concept: - Liquidity pools: pairs of tokens held in a smart contract (e.g., ETH/USDC) - Pricing formula: the AMM uses a formula to set prices based on the ratio of tokens in the pool - No counterparty needed: traders swap directly against the pool, not with other traders
The most famous formula — Uniswap's constant product (x*y=k): - If pool has 100 ETH and 200,000 USDC, k = 20,000,000 - If you buy 10 ETH, the pool has 90 ETH: 20,000,000 ÷ 90 = 222,222 USDC - You effectively paid 22,222 USDC for 10 ETH ($2,222/ETH) - Price impact: the larger your trade relative to pool size, the worse your price
AMM innovations: - Uniswap V3: concentrated liquidity (LPs set price ranges for higher capital efficiency) - Curve: stable-optimized formula for assets near 1:1 parity - Balancer: multi-asset pools with custom weightings - CLMM (Concentrated Liquidity Market Makers): used by Raydium, Orca on Solana
According to Dune Analytics data, Uniswap has processed over $2 trillion in cumulative trading volume since its 2018 launch, making it the most-used AMM protocol. AMMs enabled DeFi to flourish by creating permissionless markets for any token pair.
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Frequently Asked Questions
How does an AMM determine token price?
AMM prices are determined by the ratio of tokens in the liquidity pool, governed by the pool's mathematical formula. The price changes with every trade — buying a token reduces its supply in the pool (raising the price), selling increases supply (lowering the price). This is why large trades cause more price impact (slippage).
What are the benefits of AMMs vs. traditional order books?
AMMs enable permissionless markets for any token pair, including obscure new tokens. They guarantee liquidity at any time (as long as the pool isn't empty), require no market makers, and are fully transparent. The tradeoff is capital inefficiency and impermanent loss for liquidity providers.
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Related Terms
DEX (Decentralized Exchange)
A DEX (decentralized exchange) operates on a blockchain without a central authority, allowing users to trade directly from their wallets via smart contracts while maintaining full custody of their funds. Total DEX volume exceeded $1.5 trillion in 2024 according to DefiLlama, with Uniswap, Jupiter, and Raydium among the largest.
Impermanent Loss
Impermanent loss (IL) is the reduction in value a liquidity provider experiences compared to simply holding the same assets. It occurs because AMM rebalancing forces LPs to sell the appreciating asset and buy the depreciating one — the opposite of optimal holding behavior. IL becomes permanent if the LP withdraws before prices revert.
Liquidity
Liquidity is how easily an asset can be bought or sold without significantly moving its price. Bitcoin averages $25-35 billion in daily trading volume with tight bid-ask spreads, while most small-cap altcoins have under $1 million in daily volume — meaning even moderate trades can cause large price swings.
DEX Aggregator
A DEX aggregator routes trades across multiple decentralized exchanges simultaneously to find the best price and lowest slippage for a swap. Protocols like 1inch, Jupiter, and Paraswap split orders across liquidity sources to optimize execution.
Intent-Based Trading
Intent-based trading is a DEX architecture where users declare what they want (e.g., 'swap 1 ETH for maximum USDC') and specialized solvers compete to fill the order at the best price, rather than the user manually routing through liquidity pools.
Initial DEX Offering (IDO)
An Initial DEX Offering (IDO) is a token launch method where new tokens are sold through a decentralized exchange or launchpad platform, providing immediate liquidity and trading access without requiring a centralized exchange listing.
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