Lending protocol: borrowing and lending on-chain

How On-Chain Credit Markets Work

A lending protocol is a smart contract that lets users deposit assets to earn interest and lets other users borrow against collateral they post. Aave, Compound, Spark, and Morpho are leading examples. There are no banks, no credit scores, and no application processes—the protocol handles matching, interest rates, and collateral management algorithmically.

Loans are overcollateralized. To borrow $100 in stablecoins, you might post $150 worth of ETH. This buffer protects lenders against price volatility: if your collateral falls in value past a defined ratio, the protocol automatically sells (liquidates) part of it to repay the loan. Interest rates float continuously based on utilization—when a high share of a pool is borrowed, rates rise to attract more deposits and discourage further borrowing.

The use cases are varied. Borrowers can access leverage, avoid tax events by borrowing against rather than selling, or short an asset by borrowing and immediately selling it. Lenders earn yield on idle holdings, often higher than centralized alternatives. Sophisticated users loop deposits and borrows to amplify exposure. The main risks are smart contract failure, oracle manipulation, liquidation cascades during sharp price moves, and depeg events when stablecoin collateral wobbles.