Option E
In this situation, we cannot tell for sure how, or whether, the
firm's total interest expense on the $100 million of debt would be
affected by the mix of debentures versus first mortgage bonds. The
interest rate on each of the two types of bonds would increase as
the percentage of mortgage bonds used was increased, but the result
might well be such that the firm's total interest charges would not
be affected materially by the mix between the two
Higher percentage of mortgage bonds means less collateral each
bond has leading to higher risk and required return. Also, this
would mean less free assets for debentures leading to higher risk
and required return. But mortgage bonds are less risky comapred to
debentures, mortgage bond rates are less than rates on debentures.
This leads to :greater percentage of mortgage bonds mean higherrate
on both bonds, but average cost could be not said for
certain-higher, lower or same.