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Use the attached spreadsheets for Coca-Cola, Citigroup, and Pfizer.
a) Calculate the annual standard deviation of returns for each company, using the most recent three years of monthly returns. Use the Excel function STDEV. Multiply by the square root of 12 to convert to annual units.
b) Use the Excel function CORREL to calculate the correlation coefficient between the monthly returns for each pair of stocks.
c) Calculate the standard deviation of returns for a portfolio with equal investments in each of the three stocks.
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https://brainmass.com/business/business-management/standard-deviation-correlation-coefficient-232159
Attachments
coca-cola.xls
citigroup.xls
Pfizer.xlsSolution Preview
Please see attached file:
Use the attached spreadsheets for Coca-Cola, Citigroup, and Pfizer.
a) Calculate the annual standard deviation of returns for each company, using the most recent three years of monthly returns. Use the Excel function STDEV. Multiply by the square root of 12 to convert to annual units.
Standard deviation of Monthly return using STDEV Annual standard deviation of returns
Coca-Cola 4.7824% 16.57% =4.7824%x square root of 12
Citigroup 13.9445% 48.31% =13.9445%x square root of 12
Pfizer 5.8768% 20.36% =5.8768%x square root of 12
b) Use the Excel function CORREL to calculate the correlation coefficient between the monthly returns for each pair of stocks.
Correlation Coefficient using CORREL
Coca-Cola and Citigroup 0.3756
Coca-Cola and Pfizer 0.2389
Citigroup and Pfizer 0.4986
Correlation matrix
Coca-Cola Citigroup Pfizer
Coca-Cola 1 0.3756 0.2389
Citigroup 0.3756 1 0.4986
Pfizer 0.2389 0.4986 1
c) Calculate the standard deviation of returns for a portfolio with equal investments in each of the three stocks.
There are two methods to calculate the …
