The relationship between interest rates and inflation was first put forward by Fisher, postulates that the nominal interest rate in any period is equal to the sum of the real interest rate and the expected rate of inflation. This is termed the Fisher effect. The Fisher hypothesis says that the real interest rate in an economy is independent of monetary variables. If we add to this the assumption that real interest rates are equated across countries, then the country with the lower nominal interest rate would also have a lower rate of inflation and hence the real value of its currency would rise over time.

This is the opposite of what is usually seen in practice, where investors tend to move money from countries with lower nominal interest rates to those with higher nominal interest rates, in order to obtain the highest rate of return on their deposits. This practice even extends to borrowing in the country with the lower nominal interest rate to deposit the money in the country with the higher nominal interest rate, when it is profitable to do so (carry trade). These international money movement practices cause an increase in the value of the currency of the country with the higher nominal interest rate, contrary to the International Fisher Effect.

Fisher (1930) hypothesized that the nominal interest rate could be decomposed into two components, a real rate plus an expected inflation rate. He claimed a one-to-one relationship between inflation and interest rates in a world of perfect foresight, with real interest rates being unrelated to the expected rate of inflation and determined entirely by the real factors in an economy, such as the productivity of capital and investor time preference. This is an important prediction of the Fisher hypothesis for, if real interest rates are related to the expected rate of inflation, changes in the real rate will not lead to full adjustment in nominal rates in response to expected inflation.

A problem that arises when testing for the Fisher effect is the lack of any direct measure of inflationary expectations. For this reason, a proxy variable for inflationary expectations must be employed. Over the years, a number of approaches have been used to derive proxies for the expected rate of inflation. The majority of early studies on the Fisher effect used some form of distributed lag on past inflation rates to proxy for inflationary expectations.

The International Fisher Effect is a hypothesis in international finance that says that the difference in the nominal interest rates between two countries determines the movement of the nominal exchange rate between their currencies, with the value of the currency of the country with the lower nominal interest rate increasing. This is also known as the assumption of Uncovered Interest Parity.

The International Fisher Effect observation holds that a country with higher interest rate will also be inclined to have a higher inflation rate.

The International Fisher Effect also estimates the future exchange rates based on the nominal interest rate relationships. The estimate of the spot exchange rate 12 months from now is calculated by multiplying the current spot exchange rate by the nominal annual U.S. interest rate and then dividing it by the nominal annual British interest rate.

The relationship between interest rates and inflation was first put forward by Fisher, postulates that the nominal interest rate in any period is equal to the sum of the real interest rate and the expected rate of inflation. This is termed the Fisher effect. The Fisher hypothesis says that the real interest rate in an economy is independent of monetary variables. If we add to this the assumption that real interest rates are equated across countries, then the country with the lower nominal interest rate would also have a lower rate of inflation and hence the real value of its currency would rise over time.

This is the opposite of what is usually seen in practice, where investors tend to move money from countries with lower nominal interest rates to those with higher nominal interest rates, in order to obtain the highest rate of return on their deposits. This practice even extends to borrowing in the country with the lower nominal interest rate to deposit the money in the country with the higher nominal interest rate, when it is profitable to do so (carry trade). These international money movement practices cause an increase in the value of the currency of the country with the higher nominal interest rate, contrary to the International Fisher Effect.

Fisher (1930) hypothesized that the nominal interest rate could be decomposed into two components, a real rate plus an expected inflation rate. He claimed a one-to-one relationship between inflation and interest rates in a world of perfect foresight, with real interest rates being unrelated to the expected rate of inflation and determined entirely by the real factors in an economy, such as the productivity of capital and investor time preference. This is an important prediction of the Fisher hypothesis for, if real interest rates are related to the expected rate of inflation, changes in the real rate will not lead to full adjustment in nominal rates in response to expected inflation.

A problem that arises when testing for the Fisher effect is the lack of any direct measure of inflationary expectations. For this reason, a proxy variable for inflationary expectations must be employed. Over the years, a number of approaches have been used to derive proxies for the expected rate of inflation. The majority of early studies on the Fisher effect used some form of distributed lag on past inflation rates to proxy for inflationary expectations.

The International Fisher Effect is a hypothesis in international finance that says that the difference in the nominal interest rates between two countries determines the movement of the nominal exchange rate between their currencies, with the value of the currency of the country with the lower nominal interest rate increasing. This is also known as the assumption of Uncovered Interest Parity.

The International Fisher Effect observation holds that a country with higher interest rate will also be inclined to have a higher inflation rate.

The International Fisher Effect also estimates the future exchange rates based on the nominal interest rate relationships. The estimate of the spot exchange rate 12 months from now is calculated by multiplying the current spot exchange rate by the nominal annual U.S. interest rate and then dividing it by the nominal annual British interest rate.