What Is DeFi (Decentralized Finance)?
DeFi, short for Decentralized Finance, refers to financial services — lending, borrowing, trading, earning interest — built on public blockchains instead of banks or brokerages. Instead of a bank approving your loan, code called a "smart contract" automatically enforces the rules, and anyone can inspect exactly how it works.
Smart contracts, the building block
A smart contract is simply a program stored on a blockchain that runs automatically when its conditions are met — for example, releasing collateral back to a borrower the moment a loan is repaid in full. DeFi applications are essentially collections of smart contracts working together.
Common DeFi activities
Lending and borrowing protocols let users deposit crypto to earn interest, or borrow against crypto they’ve deposited as collateral. Decentralized exchanges (DEXs) let users swap one token for another directly, without a company like a stock exchange operator in the middle. Staking lets users lock up tokens to help secure a network in exchange for rewards.
What’s genuinely different from a bank
DeFi platforms are typically open to anyone with an internet connection and a crypto wallet — no application, credit check, or geographic restriction in the way a traditional bank account often requires. The trade-off is that there’s usually no deposit insurance, no customer support to reverse errors, and smart contract bugs or exploits have caused real, sometimes total, losses on individual protocols.
The risk side, plainly
DeFi is not risk-free just because it’s automated. Smart contract exploits, poorly designed incentive structures, and extreme price volatility have all caused significant losses in specific protocols over the years. This is general information, not a recommendation to use any particular DeFi product — anyone considering it should research the specific protocol’s track record and audits independently.
Not investment advice
This page is general information for education only, not investment, legal, or tax advice. Rules and risks can change — do your own research and consult a qualified professional before acting on anything here.