问题如下：
TAT Company has a target capital structure of 30% debt and 70% equity. And the company's marginal tax rate is 20%. The information about the bond and the equity is shown in the following tables.
Using CAPM approach, what's the company's cost of equity?
选项：
A.19%.
B.16%.
C.15%.
解释：
A is correct.
kce = RFR+ β[E(Rmkt) - RFR] = 10% + 1.5(6%) = 19%.
老师好，这道题Rm-Rf不是等于6%-10%是负的吗？
