问题如下：
Company A:
Market stock price 20
Recent dividend paid (D0) 2
Dividend payout ratio 20%
ROE 10%
When uses the DDM model, the cost of common stock will be:
选项：
A.14.5%
B.18%
C.18.8%
解释：
C is correct.
g=(1-dividend payout ratio)*ROE=(1-20%)*10%=0.08
D1 =2*(1+0.08)=2.16
re=D1/V0+g=2.16/20+0.08=18.8%
老师 红利增长率g的求解推导过程在Equity那章的哪个视频里？
