In: Finance
Both Bond A and Bond B have 7.4 percent coupons and are priced at par value. Bond A has 7 years to maturity, while Bond B has 18 years to maturity. If interest rates suddenly rise by 1 percentage points, what is the difference in percentage changes in prices of Bond A and Bond B? (i.e., Bond A - Bond B). The bonds pay coupons twice a year.
(A negative value should be indicated by a minus sign. Do not round intermediate calculations. Enter your answers as a percent rounded to 2 decimal places.)
Bond A:
Face Value = $1,000
Annual Coupon Rate = 7.40%
Semiannual Coupon Rate = 3.70%
Semiannual Coupon = 3.70% * $1,000
Semiannual Coupon = $37
Time to Maturity = 7
Semiannual Period to Maturity = 14
If bond is selling at par, then current interest rate is equal to the coupon rate
So, current interest rate is 7.40%
If interest rate increases by 1%:
Annual Interest Rate = 8.40%
Semiannual Interest Rate = 4.20%
Price of Bond = $37 * PVIFA(4.20%, 14) + $1,000 * PVIF(4.20%,
14)
Price of Bond = $37 * (1 - (1/1.042)^14) / 0.042 + $1,000 /
1.042^14
Price of Bond = $947.87
Percentage Change in Price = ($947.87 - $1,000) / $1,000
Percentage Change in Price = -5.21%
Bond B:
Face Value = $1,000
Annual Coupon Rate = 7.40%
Semiannual Coupon Rate = 3.70%
Semiannual Coupon = 3.70% * $1,000
Semiannual Coupon = $37
Time to Maturity = 18
Semiannual Period to Maturity = 36
If bond is selling at par, then current interest rate is equal to the coupon rate
So, current interest rate is 7.40%
If interest rate increases by 1%:
Annual Interest Rate = 8.40%
Semiannual Interest Rate = 4.20%
Price of Bond = $37 * PVIFA(4.20%, 36) + $1,000 * PVIF(4.20%,
36)
Price of Bond = $37 * (1 - (1/1.042)^36) / 0.042 + $1,000 /
1.042^36
Price of Bond = $908.02
Percentage Change in Price = ($908.02 - $1,000) / $1,000
Percentage Change in Price = -9.20%
Difference in Percentage Changes = Percentage Changes in Price
of Bond A - Percentage Changes in Price of Bond B
Difference in Percentage Changes = (-5.21%) - (-9.20%)
Difference in Percentage Changes = 3.99%