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发表于 2012-4-1 14:58
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The manager of a bond portfolio must immunize the portfolio with respect to a given set of liabilities. The manager is choosing between two immunization strategies: Strategy A and Strategy B. Strategy A has a lower return, lower risk, and a 99% probability of providing the required return to meet the given set of liabilities. The manager should choose Strategy B: A)
| under no circumstances, because risk minimization is the point of immunization. |
| B)
| if that strategy’s higher risk is justified by the higher return, and only if the probability of meeting the liabilities is equal to or higher than that of Strategy A. |
| C)
| if that strategy’s higher risk is justified by the higher return, and the probability of meeting the liabilities is equal to or only slightly lower than that of Strategy A. |
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In immunizing a portfolio a manager must consider a trade off between risk minimization and return maximization. Taking on extra risk under the indicated circumstances is appropriate. The probability of not meeting the liabilities can be allowed to decrease a little. There is no strict rule about the return and risk levels remaining “proportional”. |
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