How can I calculate the annual rate of return over multiple years for my investment portfolio?

To calculate the annual rate of return over multiple years for your investment portfolio, you can use the formula for compound annual growth rate (CAGR). This formula takes into account the initial and final values of your investment, as well as the number of years the investment has been held. You can calculate CAGR using the following formula:

CAGR (Ending Value / Beginning Value) (1 / Number of Years) - 1

By plugging in the values for the ending value, beginning value, and number of years, you can determine the annual rate of return for your investment portfolio.