The annualized interest rate is a theoretical rate of return, which is calculated according to a certain period of time (daily rate of return, weekly rate of return, monthly rate of return). For example, if the daily rate of return is one ten thousandth, the annualized rate of return is 360 *110000 = 3.6%, and the daily interest rate will change, which means that the annualized rate of return will change.

If the annual interest rate is 15%, then the annual interest rate is10000 *15% =1500. The annualized rate of return is 15%, but the interest you expect is 1500, and the actual interest may be more or less than 1500.