International Fisher effect

PrepNuggets

According to the Fisher effect, the nominal interest rate in a given country is approximately the sum of the real interest rate and the expected inflation rate. If this holds true for both the domestic and foreign country, we would expect the difference between nominal interest rates to be equal to the difference between the real rates, plus the difference between the expected inflation rates of the two countries. 

Under a condition known as real interest rate parity, real interest rates are assumed to converge across different markets. This is based on the idea that with free capital flows, funds will move to the country with a higher real rate until real rates between them are equalised. 

Taking the Fisher relation and real interest rate parity together gives us the international Fisher effect, where the difference in nominal interest rates between two countries should be equal to the difference between their expected inflation rates.

See also: International parity conditions, Covered interest rate parity, Uncovered interest rate parity, Forward rate parity, Purchasing power parity