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DeFiLetter: A

What is Automated Market Maker (AMM)?

Definitive Definition

An Automated Market Maker (AMM) is an autonomous decentralized exchange protocol that uses mathematical pricing algorithms (such as the constant product formula x * y = k) to price assets instantaneously against liquidity pools rather than matching buyers and sellers via an order book.

In-Depth Architectural & Economic Analysis

AMMs revolutionized decentralized trading by allowing users to trade assets permissionlessly 24/7 without waiting for a counterparty. Liquidity providers deposit token pairs into pools and earn a pro-rata share of trading fees generated by swaps.

Core Characteristics & Mechanism

  • Determines spot prices algorithmically based on the relative ratio of pool tokens.
  • Enables continuous liquidity even for low-volume and long-tail digital assets.
  • Exposes liquidity providers to impermanent loss when token price ratios diverge.
Practical Application Scenario:

Uniswap v2 and Curve Finance execute billions in daily spot volume purely through AMM liquidity pools.

Primary Sources & Formal Specifications (E-E-A-T)

Related Glossary Entries in DeFi

Decentralized Autonomous Organization (DAO)
A Decentralized Autonomous Organization (DAO) is an internet-native organization governed by smart contracts and token-weighted voting rather than a centralized executive board or corporate hierarchy.
Decentralized Finance (DeFi)
Decentralized Finance (DeFi) is an open financial ecosystem composed of smart contracts, dApps, and decentralized protocols that replicate banking services—lending, borrowing, trading, and derivatives—without custodial intermediaries.
Impermanent Loss
Impermanent loss is the temporary or permanent opportunity loss experienced by liquidity providers in an Automated Market Maker (AMM) pool when the price ratio of deposited token pairs diverges significantly from when they were deposited.