Answer:
C) 8.75%
Step-by-step explanation:
Number of periods = 4 years
Given return rates = 20%, -10%, 20%, and 5%
To obtain the arithmetic average annual return, add the return rates given for all periods and divide the sum by the number of periods.
![AAR = (20-10+ 20+ 5)/(4) \\AAR=8.75\%](https://img.qammunity.org/2020/formulas/business/college/zlfyb4eh2ehiivsow7lo0ck7eh080gmgnm.png)
Over four years, the S&P 500 index delivered an arithmetic average annual return of 8.75%.