Answer:
20.10%
Step-by-step explanation:
The first task is to compute the bond's purchase price last year which is found using the bond price formula below:
bond price=face value/(1+r)^n+ annual coupon*(1-(1+r)^-n/r
face value=$1000
r=yield to maturity=12.21%
n=number of annual coupons in 15 years=15
annual coupon=face value*coupon rate=$1000*11%=$110
bond price=1000/(1+12.21%)^15+110*(1-(1+12.21%)^-15/12.21%
bond price=1000/(1+12.21%)^15+110*(1-0.177634192 )/12.21%
bond price=$918.50
Rate of return=(price today-initial price+coupon received)/initial price
price today= $993.14
initial price=$918.50
coupon received(for 1 year)=$110
Rate of return=($993.14-$918.50+$110)/$918.50=20.10%