DeFi Lending

DeFi lending refers to lending and borrowing digital assets through decentralized finance protocols, where smart contracts, not banks or brokers, manage deposits, loans, interest, and collateral. Instead of applying for a loan from an institution, users interact directly with on-chain software that automates the process.

Most DeFi lending is pool-based. Lenders supply assets into a shared liquidity pool, and borrowers draw from that pool by posting collateral. Interest rates are typically determined algorithmically based on supply and demand in each pool, and interest accrues to suppliers over time. Because these loans are usually overcollateralized, a borrower might deposit one asset as collateral to borrow another, such as depositing ETH to borrow a stablecoin for short-term liquidity.

Smart contracts also enforce risk controls. If a borrower’s collateral value falls below required thresholds, the position can be liquidated, meaning the collateral may be sold to repay the pool. This automation can reduce reliance on intermediaries, but it also introduces smart-contract and market risks.

DeFi lending differs from centralized lending platforms in control and trust assumptions. With DeFi, users generally keep custody through their own wallets and transactions are transparent on the blockchain, while centralized lenders typically custody assets and apply off-chain rules, identity checks, and discretionary risk management. DeFi’s openness allows anyone with compatible assets to participate, but it can also expose users to protocol exploits, oracle failures, or sudden liquidity changes.

Protocols such as Aave popularized lending markets where users can earn yield on idle assets or borrow against collateral to hedge, rebalance, or access liquidity without selling holdings. DeFi lending matters because it recreates core credit functions in a programmable, global, and permissionless way, shaping how capital moves across the crypto ecosystem.