Decentralised Finance, or DeFi, refers to a set of financial services built on blockchain networks that operate without traditional intermediaries like banks, brokers, or exchanges. Instead, DeFi uses smart contracts to provide services such as lending, borrowing, trading, and earning interest.
How Does DeFi Work?
DeFi protocols run on blockchain platforms, most commonly Ethereum. Users interact with these protocols through decentralised applications (dApps) using a crypto wallet. Smart contracts automatically enforce the rules and execute transactions without requiring a central authority. All transactions are recorded on a public blockchain, making them transparent and verifiable.
Key DeFi Services
DeFi includes contract-based trading, collateralised lending and liquidity pools. Rewards, collateral values and liquidation conditions vary. Stablecoins used by these applications aim to track a reference value, but can lose their peg.
Benefits of DeFi
Public contracts can allow participants to inspect rules and combine applications. Access may still be restricted by interfaces or law. Keeping a private key does not mean retaining unrestricted control of assets deposited into contracts, and administrative permissions may affect the system.
Risks of DeFi
Smart contract bugs can be exploited by hackers. Collateral volatility can trigger liquidations. Some DeFi projects are scams (rug pulls). Regulatory uncertainty remains a significant risk globally.
Is DeFi Safe?
Audits can identify some weaknesses but do not prove a protocol is safe. Bugs, compromised permissions, bad price data and liquidity problems can cause losses. Check the specific implementation and risks; this guide is not a recommendation to deposit, borrow or seek yield.
Disclaimer: This article is for educational purposes only. It does not constitute financial advice. Always conduct your own research before participating in DeFi.
References and revision note
Revised 1 October 2026 with AI assistance to improve accuracy and structure. This is an educational overview, not hands-on product testing or personalised financial, tax or security advice. References are provided so readers can check the underlying guidance.
