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DeFiLetter: I

What is Impermanent Loss?

Definitive Definition

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.

In-Depth Architectural & Economic Analysis

When token prices move, arbitrageurs trade with the pool to keep prices aligned with external spot markets. This leaves liquidity providers with more of the depreciating asset and less of the appreciating asset compared to simply holding the tokens in a static wallet.

Core Characteristics & Mechanism

  • Remains "impermanent" until liquidity is withdrawn; if prices return to the original ratio, the loss vanishes.
  • Offset in whole or in part by cumulative trading fees and yield incentives earned while in the pool.
  • Minimized in correlated asset pools (e.g., USDC/USDT or stETH/ETH).
Practical Application Scenario:

A liquidity provider deposits 1 ETH ($3,000) and 3,000 USDC. If ETH surges to $6,000, withdrawing will yield less total USD value than holding the 1 ETH and 3,000 USDC separately.

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

Related Glossary Entries in DeFi

Automated Market Maker (AMM)
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.
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.