Question: Here are the returns on two stocks. Digital Cheese Executive Fruit January +13 +6 February 2 +1 March +4 +4 April +6 +14 May 3
Here are the returns on two stocks.
| Digital Cheese | Executive Fruit | |
|---|---|---|
| January | +13 | +6 |
| February | 2 | +1 |
| March | +4 | +4 |
| April | +6 | +14 |
| May | 3 | +2 |
| June | +2 | +5 |
| July | 1 | 2 |
| August | 7 | 1 |
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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