问一道题：NO.PZ2016021706000028

问题如下：

If Company A has a target capital structure of 30% debt, 10% preferred stock and 60% common stock. The before-tax cost of bond is 8%. The cost for preferred stock and common stock before tax is 10% and 12%, respectively. The company's marginal tax rate is 30%. What is the company's weighted average cost of capital?

选项：

9.08%.

9.88%.

11.98%.

解释：

 B is correct.

WACC = (w_d)(k_d)(1 - t) + (w_ps)(k_ps) + (w_ce)(k_ce) = 0.3*8%*(1 - 0.3) + 0.1*10% +0.6*12% = 9.88%.