Tim has invested $10,000 in several mutual funds. After 10 years, his investments are worth $18,000. His nominal annual rate of return is 8%. What information does he need in order to calculate his real rate of return?
Select the best answer from the choices provided.
the average return of the entire stock exchange during those years
the performance of the individual stocks in the mutual funds
the average prime rate over those years
the inflation rate over those years