Borrow
Obtain assets by posting collateral or using credit.
To borrow is to receive an asset now with an obligation to repay it, usually with interest. In decentralized finance, users commonly borrow tokens from a smart contract lending market after depositing collateral worth more than the debt. The protocol enforces repayment risk through collateral limits, variable rates, and automatic liquidation rather than a traditional credit officer.
Overcollateralized borrowing lets a user access liquidity without immediately selling a long-term holding. Someone may deposit ETH and borrow a stablecoin for working capital. The collateral remains exposed to ETH price changes, while the debt grows with interest. If the risk-adjusted collateral value falls too far, third-party liquidators can repay part of the debt and claim collateral at a discount.
Key measures include loan-to-value ratio, liquidation threshold, and health factor. Each collateral type receives parameters based on volatility and liquidity. Borrowing the maximum leaves almost no room for a price move, interest accrual, or oracle update. A position that appears safe in a calm market can liquidate quickly during congestion, when repaying or adding collateral is expensive.
Interest rates often change automatically with pool utilization. When most supplied assets are borrowed, rates rise to attract deposits and encourage repayment. The displayed APR is therefore a current estimate, not a fixed promise, unless the protocol explicitly offers fixed terms. Borrowers should also include origination fees, gas, bridge costs, and potential liquidation penalties.
Borrowing matters in DeFi because it supports leverage, market making, payments, and treasury management without centralized custody. It also connects risks across protocols. A borrowed asset can depeg, collateral can lose liquidity, an oracle can fail, or a smart contract can be exploited. Recursive strategies that repeatedly borrow and redeposit amplify both returns and liquidation risk.
Before borrowing, inspect contract audits, admin controls, oracle design, withdrawal liquidity, rate history, and bad-debt handling. Maintain a conservative buffer and alerts, but do not assume an alert will arrive before liquidation. Keep a repayment route available on the correct chain. Borrowing against volatile crypto is not cheap cash without consequences. It is a leveraged position whose safety depends on prices, software, liquidity, and the borrower's ability to respond.
Frequently asked questions
- The limit depends on collateral value and each asset's loan-to-value rules. Overcollateralized protocols let users borrow less than the deposit's market value to absorb volatility. The maximum is not a safe target. Interest growth and price changes can reduce the buffer immediately, so borrowers should model adverse moves and maintain a health factor well above liquidation.
- Liquidation occurs when debt becomes too large relative to risk-adjusted collateral under protocol rules, often shown by a health factor below one. Falling collateral prices, rising borrowed-asset prices, accumulated interest, or parameter changes can trigger it. A liquidator repays debt and receives collateral plus a bonus, leaving the borrower with a penalty and possibly remaining debt.
- Borrow well below the maximum, use resilient collateral, monitor rates and oracle prices, and set alerts through independent services. Keep liquid assets available to repay or add collateral without relying on a congested bridge. Understand liquidation penalties, rate model, admin powers, and depeg scenarios. Avoid recursive leverage and correlated collateral if a sharp market move could unwind both.