How DeFi Interest Rates Work: Supply, Demand, and Protocol Mechanics

DeFi interest rates are set algorithmically, not by central banks. This guide explains how utilization-based rate models work, why rates spike, and how to find consistent yield.

In traditional finance, interest rates are set by central banks and loan committees. In DeFi, rates are set by algorithms responding to real-time supply and demand. Understanding these mechanics helps you predict when rates will be high and when to enter or exit lending positions.

Utilization-Based Rate Models

Why Rates Spike Temporarily

Finding Consistent Rate Opportunities

On-chain rate monitoring tools (Morpho Rate, DeFi Yield) track historical lending rates across protocols. Consistent lending yield (not spiky) is found in: USDC on Aave Arbitrum (steady 6–8%), stablecoin LPs on Curve (steady 8–12% from fees), and RWA products tied to external rates (Ondo USDY). The most stable yields come from real economic sources, not utilization spikes.