DeFi — Decentralized Finance
Learn how decentralized finance is rebuilding banking, lending and trading on open blockchain networks — without intermediaries.
Decentralized finance, or DeFi, is a movement that recreates traditional financial services — lending, borrowing, trading, saving and earning interest — using blockchain technology and smart contracts instead of banks and brokers. Anyone with a crypto wallet and an internet connection can access DeFi applications, which run autonomously and transparently on networks like Ethereum. DeFi has grown into a major part of the crypto economy, offering both powerful new opportunities and meaningful risks.
How DeFi Works
DeFi applications are built from smart contracts: self-executing code that automatically enforces the rules of a financial product. Instead of a bank deciding whether to grant a loan, a DeFi lending protocol uses code and collateral to manage borrowing automatically. Because these applications are open and composable, they can be combined like building blocks, allowing developers to create increasingly sophisticated services. Users interact directly from their own wallets, retaining custody of their assets at all times.
Core DeFi Building Blocks
Decentralized Exchanges
Trade tokens directly from your wallet using automated market makers and liquidity pools.
Lending & Borrowing
Earn interest by supplying assets, or borrow against crypto collateral without a credit check.
Stablecoins
Tokens pegged to stable values like the US dollar, used as a reliable medium of exchange in DeFi.
Yield Farming
Strategies that move assets between protocols to maximize returns, often with higher risk.
Liquidity Pools
Pools of tokens that power trading and lending, with providers earning a share of fees.
Staking
Locking tokens to help secure a network or protocol in exchange for rewards.
Benefits of DeFi
- Open access: Anyone can participate without permission or a bank account.
- Transparency: Transactions and code are publicly verifiable on the blockchain.
- Self-custody: You keep control of your own assets rather than handing them to an intermediary.
- Composability: Protocols connect and build on one another to create new products.
Risks to Understand
DeFi is powerful but carries serious risks that every user should understand before participating. Smart-contract bugs can be exploited, leading to loss of funds. “Impermanent loss” can reduce the value of assets supplied to liquidity pools. Some projects are scams or poorly designed, and high advertised yields often reflect high risk. Because DeFi is largely non-custodial, there is usually no customer support or way to reverse mistakes, so careful research and caution are essential.