The real interest rate is your rate of return in terms of value, taking into account the factor of time. It refers to the real interest rate at which the investor gets the interest return. It is to remove the influence of inflation rate. For example, Xiao Ming deposits 1000 yuan into a bank, and the nominal interest rate of the bank is 10%. Then he can withdraw 1100 yuan from the bank in a year. If the price rises by 10%, although Xiao Ming took 1100 yuan, his purchasing power does not increase. Now he can only buy a 1100 yuan thing that he spent 1000 yuan on saving, and the real interest rate is 0.