"investment portfolio" exercises: sample variance
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Questions 1:
A portfolio has the following returns:
| Portfolio Returns | |
| 2006 | 2.4% |
| 2007 | 9.6% |
| 2008 | -4.0% |
| 2009 | 5.6% |
| 2010 | 4.8% |
| 2011 | -3.2% |
The sample variance of the portfolio is closest to:
A. 0.23%.
B. 0.28%.
C. 0.36%.
Questions 2:
Which of the following types of institutions is most likely to have a long investment time horizon and a higher level of risk tolerance?
A. An endowment
B. An insurance company
C. A bank
【analysis】
The sample variance is calculated as the sum of squared deviations from the arithmetic mean.
The formula is shown in the following figure:
【analysis】
Endowments have a long investment time horizon and a high level of risk tolerance.
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