Question

In: Finance

Consider a bond with a coupon of 7.2 percent, five years to maturity, and a current...

Consider a bond with a coupon of 7.2 percent, five years to maturity, and a current price of $1,027.60. Suppose the yield on the bond suddenly increases by 2 percent.

a. Use duration to estimate the new price of the bond. (Do not round intermediate calculations. Round your answer to 2 decimal places.)

Price: ______

b. Calculate the new bond price using the usual bond pricing formula. (Do not round intermediate calculations. Round your answer to 2 decimal places.)

Price: _____

Solutions

Expert Solution

a

                  K = N
Bond Price =∑ [( Coupon)/(1 + YTM)^k]     +   Par value/(1 + YTM)^N
                   k=1
                  K =5
1027.6 =∑ [(7.2*1000/100)/(1 + YTM/100)^k]     +   1000/(1 + YTM/100)^5
                   k=1
YTM% = 6.54

Period Cash Flow Discounting factor PV Cash Flow Duration Calc
0 ($1,027.60) =(1+YTM/number of coupon payments in the year)^period =cashflow/discounting factor =PV cashflow*period
1             72.00                                                             1.07                    67.58                  67.58
2             72.00                                                             1.14                    63.43                126.86
3             72.00                                                             1.21                    59.54                178.61
4             72.00                                                             1.29                    55.88                223.53
5       1,072.00                                                             1.37                  780.96              3,904.82
      Total              4,501.41
Macaulay duration =(∑ Duration calc)/(bond price*number of coupon per year)
=4501.41/(1027.6*1)
=4.380512
Modified duration = Macaulay duration/(1+YTM)
=4.38/(1+0.0654)
=4.111612
Using only modified duration
Mod.duration prediction = -Mod. Duration*Yield_Change*Bond_Price
=-4.11*0.02*1027.6
=-84.5
%age change in bond price=Mod.duration prediction/bond price
=-84.5/1027.6
=-8.22%
New bond price = bond price+Modified duration prediction
=1027.6-84.5
=943.1

b

                  K = N
Bond Price =∑ [( Coupon)/(1 + YTM)^k]     +   Par value/(1 + YTM)^N
                   k=1
                  K =5
Bond Price =∑ [(7.2*1000/100)/(1 + 8.54/100)^k]     +   1000/(1 + 8.54/100)^5
                   k=1
Bond Price = 947.25

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