Answer:
9.84%
Explanation:
The bond's yield to maturity( pre-tax cost of debt) can be determined using the financial calculator approach as below:
N=50 (number of semiannual coupons in 25 years i.e 25*2)
PMT=55 (semiannual coupon=face value*coupon rate*6/12=$1000*11%*6/12=$55)
PV=-844.87 (current market price)
FV=1000 (face value)
CPT I/Y=6.56% (semiannual yield)
annual yield=6.56% *2=13.12%
after tax cost of debt=pretax cost of debt*(1-tax rate)
after tax cost of debt=13.12% *(1-25%)=9.84%