A pension plan is obligated to make disbursements of $1 million, $2 million, $5 million, and $1 million at the end of each of the next four years, respectively. If the plan wants to fully fund and immunise its position, how much of its portfolio should it allocate to one-year zero-coupon bonds and perpetuities, respectively, if these are the only two assets funding the plan? Assume the interest rate is 10% annually. Group of answer choicesDuration is 2.6019Duration is 2.7329Duration is 2.6873Duration is 2.5871
Question
A pension plan is obligated to make disbursements of 2 million, 1 million at the end of each of the next four years, respectively. If the plan wants to fully fund and immunise its position, how much of its portfolio should it allocate to one-year zero-coupon bonds and perpetuities, respectively, if these are the only two assets funding the plan? Assume the interest rate is 10% annually. Group of answer choicesDuration is 2.6019Duration is 2.7329Duration is 2.6873Duration is 2.5871
Solution
To answer this question, we first need to calculate the present value of the pension plan's obligations and the duration of these obligations.
- Calculate the present value of the obligations:
PV = 2 million / (1+0.10)^2 + 1 million / (1+0.10)^4 PV = 1.65 million + 0.683 million PV = $7.033 million
- Calculate the duration of the obligations:
Duration = (1* 1.65 million + 3* 0.683 million) / 7.033 million Duration = 18.314 million / 7.033 million Duration = 2.6019
So, the duration of the pension plan's obligations is 2.6019 years.
To immunize its position, the pension plan should allocate its portfolio such that the duration of its assets matches the duration of its liabilities. This means that the pension plan should allocate its portfolio between one-year zero-coupon bonds and perpetuities in such a way that the overall duration of the portfolio is 2.6019 years.
The exact allocation will depend on the durations of the one-year zero-coupon bonds and the perpetuities. Since the duration of a one-year zero-coupon bond is 1 year and the duration of a perpetuity is infinite, the pension plan will need to allocate more of its portfolio to the one-year zero-coupon bonds to bring the overall duration of the portfolio down to 2.6019 years.
So, the correct answer is "Duration is 2.6019".
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