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Decentralised Exchange (DEX) Meaning

A decentralised exchange, or DEX, is a trading platform that allows users to buy and sell digital assets directly with one another without relying on a central intermediary. DEXs operate through smart contracts that facilitate trade execution, settlement, and custody, enabling users to retain control over their private keys and funds throughout the trading process. Unlike centralized exchanges, which hold user assets and manage order books internally, DEXs typically use automated market makers or on-chain order books.

Automated market makers rely on liquidity pools funded by users, with prices determined algorithmically based on supply and demand. This structure enables continuous trading without requiring traditional counterparties, making markets more accessible and permissionless. DEXs play a crucial role in decentralized finance by enabling open access to trading for anyone with a compatible wallet.

They often list tokens before centralized venues, contributing to innovation and early liquidity formation. By eliminating custodial risk, DEXs reduce reliance on centralized operators and mitigate certain failure modes, such as exchange insolvency or withdrawal freezes.

However, DEXs are not without drawbacks. On-chain trading can be slower and more expensive during network congestion, and liquidity may be fragmented across platforms.

Smart contract vulnerabilities and front-running risks also present challenges. Despite these trade-offs, decentralized exchanges have become a foundational component of crypto market infrastructure, reflecting the broader shift toward self-custody and decentralized execution.

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