What is the difference among the geometric mean, the arithmetic mean and Harmonic mean of a set of stock returns? Which method is appropriate to measure performance of the following cases? The stock return for AXZ company over the past 5 years are 25%, 34%, 19%, 54%, and 17%, estimate the average annual return of the AXZ. The stock return for AME company over the last three years are 23.45%, -9.34%, and 8.92%, compute the compound annual rate of return of AME. An investor purchased $1000 of ADC companys stocks every year over the last 3 years, and annual share prices are $8, $9, and $10, estimate average cost per share for the investor?