Fisher Effect
A theory describing the long-run relationship between inflation and interest rates.
Investopedia Commentary
This equation tells us that, all things being equal, a rise in a country's expected inflation rate will eventually cause an equal rise in the interest rate (and vice versa).
Related Links
Forces Behind Interest Rates
All about Inflation Tutorial
See also: CPI, Deflation, Disinflation, Hyperinflation, Inflation, PPI, Reflation, RPI, Stagflation
Fisher effect