Answer:
7.85%
Step-by-step explanation:
Yield to maturity is considered as the cost of debt.
The actual return that an investor earn on a bond until its maturity is called the Yield to maturity. It is a long term return which is expressed in annual rate.
According to given data
Face Value = $900
Coupon Payment = C = $54 every six months
Price of the Bond = P = $845.87
Numbers of period = n = (25-5) years x 2 = 40 periods
Use Following Formula to calculate YTM
Yield to maturity = [ C + ( F - P ) / n ] / [ (F + P ) / 2 ]
Yield to maturity = [ $54 + ( $900 - $845.87 ) / 40 ] / [ ($900 + 845.87 ) / 2 ]
Yield to maturity = $55.35 / 872.94
Yield to maturity = 0.0634 = 6.34% per six months
Now find the annual rate by following compounding factor.
YTM = [ ( 1 + 6.34%)^2 ] - 1 = 13.1% per year
Now we will deduct the tax from the rate.
After tax cost of Debt = 13.1 x ( 1 - 0.4 ) = 7.85%