Compound Protocol is a decentralized lending platform where users earn interest by supplying crypto assets and can borrow against collateral, with rates determined algorithmically by supply and demand. It pioneered the model that most DeFi lending protocols now follow, which makes understanding it essential for anyone building a DeFi strategy.
After learning about Uniswap trading strategies and governance token fundamentals, Compound provides practical experience with DeFi's most established lending protocol.
How Compound works
Compound creates shared liquidity pools rather than matching individual lenders with borrowers directly. When you supply assets, all depositors contribute to a shared pool that all borrowers draw from. Interest rates adjust automatically based on the utilization rate, meaning the percentage of supplied assets currently borrowed. Higher utilization means higher rates for lenders and borrowers alike. This automatic rate adjustment creates market equilibrium without human intervention or institutional bias.
When you deposit into Compound, you receive cTokens representing your share of the pool. cDAI for DAI deposits, cETH for ETH, and so on. These cTokens accrue value as interest compounds automatically in the exchange rate. You withdraw by redeeming cTokens for the underlying asset plus accumulated interest. The compounding happens continuously without any action required on your part, and cTokens can be transferred or used as collateral in other DeFi protocols, creating additional utility beyond simple lending.
Supplying assets to earn interest
Connect a Web3 wallet to app.compound.finance, select an asset from the supported list (ETH, USDC, DAI, WBTC, and others), and confirm the deposit transaction. The supply APY is displayed in real time and changes with market conditions. Stablecoin supplies like USDC and DAI tend to offer the most predictable yields since you avoid price volatility on the deposited asset itself. ETH supply yields are typically lower but earn on an asset that may appreciate independently.
Rates on Compound reflect real borrowing demand, which means they are not promotional. Periods of high DeFi activity, market volatility, or leverage demand can push supply rates meaningfully higher. Periods of low activity compress them. Monitoring utilization rates and rate trends across lending protocols helps with allocation decisions.
Borrowing against collateral
To borrow on Compound, you first supply collateral, then borrow up to the collateral factor of that asset, which ranges from 50-85% depending on the asset's risk profile. ETH collateral might allow you to borrow up to 82.5% of its value in other assets. If the value of your collateral falls or your borrowed balance grows (through accrued interest) such that your health factor approaches the liquidation threshold, Compound smart contracts will liquidate enough collateral to restore solvency.
Monitoring your health factor is not optional. DeFi protocols have no customer service to call if you miss a liquidation alert. Set up monitoring through DeFi dashboards like Debank or Zapper, and keep substantial buffer above minimum collateral requirements. Borrowing at 50-60% of your collateral capacity rather than the maximum provides meaningful protection against sudden price moves.
COMP governance token
COMP is distributed to both lenders and borrowers proportionally to their protocol activity. Token holders vote on protocol upgrades, parameter changes, and treasury allocation. COMP accrues automatically and can be claimed at any time. The effective yield from COMP distribution adds to supply APY, though the COMP price fluctuates independently and should not be counted on as stable income.
Risk considerations
Smart contract risk is real: Compound has been live since 2018 and has processed hundreds of billions in transactions, but past security is not a guarantee of future safety. Protocol upgrades introduce new code that requires new audits. Liquidation risk affects borrowers if prices move suddenly. Asset risk varies by supplied token, with stablecoins carrying lower price risk but their own peg and issuer risks. Starting with small amounts and understanding each risk before scaling is the appropriate approach for new users.
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