What Is DeFi? Decentralized Finance Explained

Decentralized finance, or DeFi, recreates traditional financial services — lending, borrowing, trading, and earning yield — using public blockchains and smart contracts instead of banks. Anyone with a wallet and an internet connection can access it, permissionlessly, anywhere in the world.

How DeFi differs from a bank

A bank holds your money, decides who qualifies for a loan, and can freeze accounts. In DeFi, smart contracts hold the funds and enforce the rules automatically. You keep custody of your assets, interest rates adjust algorithmically to supply and demand, and the code is open for anyone to audit.

The core building blocks

• Decentralized exchanges (DEXs): swap tokens directly from your wallet using liquidity pools rather than an order book.
• Lending protocols: deposit assets to earn yield, or post collateral to borrow against it.
• Stablecoins: dollar-pegged tokens that provide a stable unit of account.
• Yield farming: moving assets between protocols to maximize returns — higher reward, higher risk.

The risks you must understand

DeFi is powerful but unforgiving. Smart-contract bugs can be exploited, token prices can collapse, and there is no customer-support line to reverse a mistake. “Impermanent loss,” scam tokens, and over-leveraged positions have cost users billions. Treat high advertised yields with suspicion and read our crypto safety tips first.

Getting started

Begin with a self-custody wallet, a small amount you can afford to lose, and a single well-established protocol. Track your gains and losses with our P&L calculator, and keep an eye on broader market conditions on the markets page.

DeFi remains one of the most active and innovative corners of crypto — a live experiment in rebuilding finance as open, global software.