Question: Here are the returns on two stocks. Digital Cheese Executive Fruit January + 1 9 + 8 February 3 + 1 March + 5 +

Here are the returns on two stocks.
Digital Cheese Executive Fruit
January +19+8
February 3+1
March +5+4
April +7+17
May 4+2
June +3+4
July 23
August 82
Required:
a-1. Calculate the variance and standard deviation of each stock.
a-2. Which stock is riskier if held on its own?
b. Now calculate the returns in each month of a portfolio that invests an equal amount each month in the two stocks.
c. Is the variance more or less than halfway between the variance of the two individual stocks?

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