Definition
The real interest rate captures the actual purchasing power change from lending or borrowing. Negative real rates (when inflation exceeds nominal rates) effectively subsidize borrowers at lenders' expense, encouraging risk-taking and asset price inflation. The Fisher equation formalizes the relationship: nominal rate ≈ real rate + expected inflation.
functions Formula
Real Rate ≈ Nominal Rate − Inflation Rate
lightbulb Example
The fed funds rate is 5.0% and inflation is 3.5%. Real rate = 1.5%—monetary policy is moderately restrictive. If inflation were 6.0%, the real rate would be -1.0%, meaning policy is actually stimulative despite the seemingly high nominal rate.
verified_user Key Points
- Nominal rate minus inflation
- Negative real rates subsidize borrowers
- Fisher equation: nominal ≈ real + expected inflation
- Real rates drive actual economic behavior more than nominal