Please show all work and formulas in excel please! The Table for the problem is attached.  Table below shows the historical returns for Companies A, B and C If one investor has a portfolio consisting of 50% Company A and 50% Company B, what are the average portfolio return and standard deviation? What is Sharpe ratio if the risk-free rate is 3.8%? If another investor has a portfolio consisting of 1/3 Company A, 1/3 Company B and 1/3 Company C, what are the average portfolio return and standard deviation? What is Sharpe ratio if the risk-free rate is 3.8% What would happen to the portfolio risk if more and more randomly selected stocks were added?

Essentials Of Investments
11th Edition
ISBN:9781260013924
Author:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Publisher:Bodie, Zvi, Kane, Alex, MARCUS, Alan J.
Chapter1: Investments: Background And Issues
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Please show all work and formulas in excel please! The Table for the problem is attached. 

Table below shows the historical returns for Companies A, B and C

  1. If one investor has a portfolio consisting of 50% Company A and 50% Company B, what are the average portfolio return and standard deviation? What is Sharpe ratio if the risk-free rate is 3.8%?
  2. If another investor has a portfolio consisting of 1/3 Company A, 1/3 Company B and 1/3 Company C, what are the average portfolio return and standard deviation? What is Sharpe ratio if the risk-free rate is 3.8%
  3. What would happen to the portfolio risk if more and more randomly selected stocks were added?
Year
1
2
3
4
5
6
7
8
9
10
Company A
30%
7%
18%
-22%
-14%
10%
26%
-10%
-3%
38%
Company B Company C
26%
47%
15%
-54%
-14%
-15%
2%
-18%
42%
30%
-32%
28%
15%
7%
-28%
40%
17%
-23%
-4%
75%
Transcribed Image Text:Year 1 2 3 4 5 6 7 8 9 10 Company A 30% 7% 18% -22% -14% 10% 26% -10% -3% 38% Company B Company C 26% 47% 15% -54% -14% -15% 2% -18% 42% 30% -32% 28% 15% 7% -28% 40% 17% -23% -4% 75%
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