Introduction to DeFi: Decentralised Finance

DeFi is a fast‑growing ecosystem of financial applications built on blockchain. No banks, no brokers – just code. Learn what DeFi is, how it works, and the opportunities (and risks) it offers.

Phase 4: Skill Building · 13 min read

🧱 What Is DeFi?

Decentralised Finance, or DeFi, refers to financial services that run on public blockchains, mainly Ethereum. Instead of relying on a central authority (like a bank), DeFi uses smart contracts – self‑executing code – to facilitate lending, borrowing, trading, and earning interest.

Anyone with an internet connection and a crypto wallet can access DeFi protocols. Your funds remain in your control (self‑custody) until you interact with a smart contract. But with great power comes great responsibility – and risk.

Lending & Borrowing

Protocols like Aave and Compound let you lend crypto to earn interest, or borrow against your holdings. Rates are determined algorithmically by supply and demand.

Decentralised Exchanges (DEX)

Uniswap, Curve, and others allow token swaps directly from your wallet. No order book – you trade against liquidity pools funded by users.

Stablecoins

DAI, USDC, and others are cryptocurrencies pegged to a stable asset (like the USD). They’re essential for trading and earning without volatility.

Yield Farming

Providing liquidity to protocols in exchange for fees and sometimes extra governance tokens. Can be lucrative but comes with impermanent loss and smart contract risk.

⚠️ Understand the Risks

Start small! Only invest what you can afford to lose, and consider using well‑audited, established protocols.

DeFi Yield Simulator

See how your crypto could grow in a DeFi lending protocol. Enter an amount and APY to see potential earnings – remember, APYs can change and risks exist.

Fill in the details and click "Calculate Potential Returns".

💡 APYs are variable and not guaranteed. This is a simplified illustration.

📝 Test your knowledge: DeFi Basics

1. What does DeFi stand for?
Decentralized Funding
Decentralized Finance
Digital Finance
Distributed Financial Infrastructure
2. Which technology enables DeFi applications to run without intermediaries?
Central servers
Smart contracts on blockchain
Traditional banks
Payment processors
3. What is a DEX?
A type of stablecoin
A decentralized exchange where users trade directly from their wallets
A centralized exchange like Coinbase
A hardware wallet
4. What is one major risk of providing liquidity to a DeFi pool?
You cannot withdraw your funds
Impermanent loss – the value of your deposited assets may change relative to holding them
You lose your private keys
The exchange rate is fixed
5. Which statement about DeFi is TRUE?
DeFi is regulated like traditional banks
Anyone with an internet connection and a wallet can use DeFi protocols
DeFi only works on Bitcoin
DeFi guarantees returns

📘 Continue building your skills