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  3. Decentralized Exchange (DEX)

Decentralized Exchange (DEX)

A decentralized exchange is a blockchain-based trading arrangement that uses smart contracts to execute asset swaps without a conventional central order-taking operator.

Defined termReviewed 16 July 2026

Related terms

Centralized Exchange (CEX)Smart ContractLiquidityWalletBitcoinBlockchain

Educational risk notice

This material is general education, not personal investment advice or a promise of results. Markets can move beyond planned levels, and losses can exceed expectations when leverage, liquidity, gaps, or operational failures are involved.

term specific risk
Read the full risk disclosure
Trading glossaryReviewed 16 July 2026

Definition

A decentralized exchange is a blockchain-based trading arrangement that uses smart contracts to execute asset swaps without a conventional central order-taking operator.

In market context

DEX designs may use liquidity pools, on-chain order books, aggregators, or other mechanisms, and users commonly authorize transactions from their own wallets. This can reduce reliance on a central custodian while introducing smart-contract, token, oracle, liquidity, governance, and transaction-ordering risks. The interface may still be operated by an identifiable party, and decentralization does not guarantee legal compliance, fair pricing, or recoverability after an error.

Risk context

A malicious token or vulnerable smart contract can cause irreversible asset loss even when the user retains control of the wallet.

Source

Use the primary source for fuller regulatory or market context.

BIS — The Crypto Ecosystem: Key Elements and Risks

Educational risk notice

This material is general education, not personal investment advice or a promise of results. Markets can move beyond planned levels, and losses can exceed expectations when leverage, liquidity, gaps, or operational failures are involved.

term specific risk
Read the full risk disclosure

Related glossary terms

Selected from explicit term relationships and shared tags.

beginner3 min

Centralized Exchange (CEX)

A centralized exchange is a trading venue operated by an organization that controls account access, order matching, custody arrangements, or settlement processes.

crypto · marketsRead guide
beginner3 min

Smart Contract

A smart contract is code deployed to a distributed ledger that executes defined state changes when transactions satisfy its programmed conditions.

crypto · blockchainRead guide
beginner3 min

Liquidity

Liquidity is the ability to transact a meaningful quantity promptly near prevailing prices without causing a disproportionate price change in the wider market.

markets · executionRead guide
beginner3 min

Wallet

A cryptoasset wallet is a system for managing keys, addresses, and transaction signing rather than a container that physically stores blockchain assets.

crypto · securityRead guide