A bond currently selling for $1,050 which gives it a yield of 8%. Suppose that if the yield increases by 25 basis point, the price of the bond falls to $1,020. What is the duration of the bond?
Given,
Bond price = $1050
Yield = 8% or 0.08
Change in yield = 25 basis point or 0.25%
New price = $1020
Solution :-
Change in price = $1020 - $1050 = -$30
Modified duration = (-change in price/bond price) change in yield
= (-(-$30)/$1050) 0.25%
= 0.02857142857 0.25% = 11.42857 years
Macaulay duration = modified duration x (1 + yield/2)
= 11.42857 years x (1 + 0.08/2)
= 11.42857 years x (1 + 0.04)
= 11.42857 years x (1.04) = 11.8857 years
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