The bank's monthly interest rate is 0.25% and the annual interest rate is 3%. Annual interest rate = monthly interest rate multiplied by 12. So the annual interest rate of 0.25% is 3%. The annual interest rate refers to the one-year deposit rate. The so-called interest rate is the abbreviation of "interest rate", which refers to the ratio of interest amount to deposit principal or loan principal within a certain period of time. Usually divided into annual interest rate, monthly interest rate and daily interest rate. The annual interest rate is expressed as a percentage of the principal, the monthly interest rate as a percentage, and the daily interest rate as a percentage. When the economic development is in the growth stage, the investment opportunities of banks increase, the demand for loanable funds increases and interest rates rise; On the contrary, when the economic development level is low and the society is in a depression period, banks' willingness to invest will decrease, the demand for loanable funds will naturally decrease, and the market interest rate will be lower.