Independent solution

How to solve this Immunization and Asset-Liability Management question

Setup

Setup

At the immunization yield, match liability present value with the two zero-coupon asset values.

L7=1750000(1.07)12L_7=1750000(1.07)^{-12}
P14=L7242180(1.07)5P_{14}=L_7-242180(1.07)^{-5}

Model

Model

Accumulate the long-zero present value to its year-14 face amount.

X=P14(1.07)14X=P_{14}(1.07)^{14}

Compute

Compute

The long face is 1558336.95. Repricing at 4% produces asset-minus-liability value 5910.228024.

S4=242180(1.04)5+X(1.04)141750000(1.04)12S_4=242180(1.04)^{-5}+X(1.04)^{-14}-1750000(1.04)^{-12}
S4=5910.22802354S_4=5910.22802354

Answer

Answer

The present-value surplus is approximately 5,910, selecting choice A.

S45910(A)\boxed{S_4\approx5910\quad\text{(A)}}