Yield

Yield in DeFi represents the returns earned from deploying capital into protocols, typically expressed as Annual Percentage Yield (APY), the annualized return accounting for compounding. Understanding yield sources is required because not all yields are created equal and high advertised rates often mask unsustainable economics.

Sustainable yield comes from economic activity: trading fees from AMM liquidity provision (you earn when traders swap through your pool), interest from lending (borrowers pay to access your capital), and staking rewards from protocol inflation (new token issuance to validators). These yields tend to be modest but persistent.

Unsustainable yield typically comes from token emissions, protocols distributing governance tokens to bootstrap liquidity and usage. When a new DeFi protocol offers 500% APY, that's almost certainly token emissions that will decline sharply once early adopter incentives end. Mercenary capital chases these emissions and leaves when they decrease, often crashing token prices.

Real yield, yield derived from protocol fees rather than emissions, has become an important metric for evaluating DeFi sustainability. Yield also carries risks that reduce effective returns: impermanent loss for liquidity providers, smart contract vulnerabilities, oracle manipulation, and opportunity cost of locked capital.

Experienced yield farmers actively manage positions across protocols, chasing optimal risk-adjusted returns while accounting for gas costs, lock-up periods, and emission schedules.