# Hedging interest rate risk

Question (Hedging interest rate risk – 5 marks)

• you need to implement a hedging strategy to ensure that the fund has enough capital to
meet a liability. The superannuation fund will need to pay \$100 million in 5 years’ time.
(a) Use the current yield curve to determine the present value and also the modi ed du-
ration of the liability.
(1 mark)
(b) Now, in order to hedge interest rate risk, you want to invest in a bond portfolio which
has the same modi ed duration as the liability. To accomplish this task, pick two of
the treasury bonds currently traded in the market, Bond A and Bond B, compute their
modi ed durations and determine the dollar amount that should be invested in each
bond. Note that you need to determine which two bonds are most suitable and explain
your choice. Also, assume the modi ed duration of your bond portfolio is given by
where wA and wB are the percentage weights invested in Bond A and Bond B respec-
tively.
(2 marks)
(c) Now suppose the entire yield curve shifts down by 100 bps. Calculate the percentage
change in the present value of the liability in part (a) and also of the value of the bond
portfolio in part (b). Comment on the e ectiveness of the hedge.
(2 marks)

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