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发表于 2012-4-1 14:53
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John Gillian approaches Carl Mueller, CFA, about managing his bond portfolio. Gillian has two large bond positions. The first of these is $2.8 million face value with a coupon rate of 7.6% (paid semiannually), ten years to maturity, and is currently priced to yield 6.5%. The second position is $4.4 million face of zero coupon bonds that will mature in four years and are priced to yield 5.3%. Gillian asks about interest rate forecasts for the next four years. Mueller says that he expects yields to remain approximately the same (i.e. 6.5%) for maturities of six to 10 years. Gillian says that he needs to have at least $8 million in value at the end of four years.
After further discussion with Gillian about his goals, Mueller determines that a contingent immunization strategy would be the best approach for the coupon-bond position. Gillian asks Mueller to explain the strategy. Mueller says that it is a fairly simple strategy that has only two requirements: determining an available target return and an appropriate safety net return.
Mueller begins computing the necessary inputs for the coupon-bond position. He first calculates the required terminal value and associated target return. Given Gillian’s goal for the total portfolio value, Mueller computes the safety net return, cushion spread, and dollar safety margin.
Gillian asks how likely it is that Mueller will have to immunize the portfolio. He asks if Mueller’s immunization strategy would be required if there is a 50 basis point increase in the market yield today and the rates remain at that level for the next four years.Mueller’s description of the requirements of a contingent immunization strategy is: | B)
| incorrect because the strategy does not require an available target return although it does require an appropriate safety net return. |
| C)
| incorrect because it is incomplete. |
|
The strategy does require both an available target return and an appropriate safety net return. Mueller did not mention an important third step: the establishment of effective monitoring procedures to ensure adherence to the contingent immunization plan. (Study Session 9, LOS 23.i)
The most likely reason that Mueller did not discuss an immunization strategy for Gillian’s zero-coupon bond position is: A)
| there was no need to do so. |
| B)
| it is possible to immunize zero coupon bonds, but it is very costly. |
| C)
| it is impossible to immunize zero coupon bonds. |
|
Since the maturity of the zero coupon bonds coincided with the investment horizon, there was no need to immunize that position. There is neither reinvestment nor price risk. (Study Session 9, LOS 23.k)
The required terminal value for the coupon-bond position is:
Since Gillian requires a total of $8 million for his portfolio and the zero coupon bonds will mature with a value of $4.4 million, the coupon bonds have a required terminal value equal to $8 million minus $4.4 million, or $3.6 million. (Study Session 9, LOS 23.i)
The cushion spread for the coupon-bond position is:
Cushion spread is the difference between current rates of return and the minimum required rate of return:
The current value of the coupon bond position is:
INPUTS: N= 20, I/Y = 6.5%/2 = 3.25%, PMT = 7.6%/2 = 3.8% of $2.8 million = $106,400, FV = 2,800,000, CPT PV → PV = -3,023,906 (ignore minus sign)
The minimum required return based upon the required terminal coupon-bond position value of $3.6 million and its present value is (3,023,906)(1+X)8 = 3,600,000. Solving for X we then have:
(1+X)8 = 3,600,000 / 3,023,906
(1+X)8 = 1.1905
1+X = 1.1905.125
1+X = 1.02204
X = .02204
I = 2.204% X 2 = 4.41%
Cushion spread = 6.50 - 4.41 = 2.09%
(Study Session 9, LOS 23.i)
The dollar safety margin for the coupon-bond position is closest to:
This is the difference between the current value of the bond portfolio and the present value of the estimated terminal value given the current return:
Current value of the portfolio = $3.024 million as determined in the previous question.
Assets required given a terminal value of $3,600,000 and current rates of return of 6.5%:
3,600,000 / (1.0325)8 = 2,787,289
Dollar safety margin = 3,023,906 - 2,787,289 = 236,617
(Study Session 9, LOS 23.i)
Given the forecast of a 50 basis point increase in market yield on the coupon bonds, Mueller will: A)
| have to switch to an immunization strategy for the portfolio. |
| B)
| have to switch to a passive management strategy for the portfolio. |
| C)
| be able to continue with an active management strategy for the portfolio. |
|
For a 50 basis point increase in market yields to 7.0% the present value of assets will then become:N = 20, I/Y = 3.5, PMT = 106,400, FV = 2,800,000, CPT PV → PV = -2,919,384
Assets required at the new interest rate of 7.0% =
3,600,000 / (1.035)8 = 2,733,882
The present value of assets of $2.9 million > present value of assets required of $2.7 million thus a 50 basis point increase in market yields will not trigger a switch to immunization to achieve the terminal value of $3.6 million for the coupon bonds. (Study Session 9, LOS 23.i) |
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