Independent solution

How to solve this Immunization and Asset-Liability Management question

Setup

Setup

Apply the time-4 asset directly against the liability, leaving 500,000 to immunize with the outer cash flows.

L=750000250000=500000L^*=750000-250000=500000

Model

Model

At time 4, match value and the first sensitivity of the year-2 and year-5 cash flows.

500000=AXv2+AZv500000=A_Xv^{-2}+A_Zv
0=2AXv3+AZ0=-2A_Xv^{-3}+A_Z

Compute

Compute

Eliminating AZ gives 500,000 = 3AXv to the −2, so AX = 150416.666667.

AX=500000v23=150416.66666667A_X=\frac{500000v^2}{3}=150416.66666667

Answer

Answer

Asset X pays approximately 150,000, selecting choice A.

AX150000(A)\boxed{A_X\approx150000\quad\text{(A)}}