Answer:
Fisher effect
Explanation:
Fisher effect is the effect in the economic theory that is established by the economist Irving Fisher, which states the relationship among the inflation and both nominal and the real interest rates.
This effect state that the real rate of interest equals to the nominal rate of interest deduct the expected inflation rate.
So, the relationship which is mentioned in the question is the fisher effect as it state the rate of interest that reflect the expectations likely the future inflation rates.