How to calculate the following questions in excel?
Suppose the standard deviation of the market return is 20%.
a. What is the standard deviation of returns on a well-diversified portfolio with a beta of 1.3?
b. What is the standard deviation of returns on a well-diversified portfolio with a beta of 0?
c. A well-diversified portfolio has a standard deviation of 15%. What is its beta?
d. A poorly diversified portfolio has a standard deviation of 20%. What can you say about its beta?