Now suppose that the manager misestimates the beta of Waterworks stock, believing it to be .50 instead

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Now suppose that the manager misestimates the beta of Waterworks stock, believing it to be .50 instead of .75. The standard deviation of the monthly market rate of return is 5%.

a. What is the standard deviation of the (now improperly) hedged portfolio?

b. What is the probability of incurring a loss over the next month if the monthly market return has an expected value of 1% and a standard deviation of 5%?

c. What would be the probability of a loss using the data in Problem 15 if the manager similarly misestimated beta as .50 instead of .75?

d. Why does the misestimation of beta matter so much more for the 100-stock portfolio than it does for the 1-stock portfolio?


Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...
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Investments

ISBN: 9780073530703

9th Edition

Authors: Zvi Bodie, Alex Kane, Alan J. Marcus

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