Independent solution

How to solve this Cost of an Exactly Matched Bond Portfolio question

Setup

Setup

Price a 1000-face one-year coupon bond at the 2.1% half-year yield.

PB=301.021+1,0301.0212=1,017.4485P_B=\frac{30}{1.021}+\frac{1{,}030}{1.021^2}=1{,}017.4485

Model

Model

Choose its face scale to match the year-1 liability exactly.

u=1,5001,030u=\frac{1{,}500}{1{,}030}
uPB=1,481.7211uP_B=1{,}481.7211
30u=43.689330u=43.6893

Compute

Compute

A six-month zero must supply the remainder of the earlier liability.

PZ=2,00043.68931.0175=1,922.6641P_Z=\frac{2{,}000-43.6893}{1.0175}=1{,}922.6641

Answer

Answer

The dedicated portfolio costs 3404.39, choice B.

1,481.7211+1,922.6641=3,404.39(B)\boxed{1{,}481.7211+1{,}922.6641=3{,}404.39\quad\text{(B)}}