(1)D0=(2700-500)/1100=2(元)
D1=2×(1+18%)=2.360(元)
D2=2.360×(1+15%)=2.714(元)
D3=2.714×(1+10%)=2.985(元)
股票的必要报酬率=2%+1.5×(6%-2%)=8%
股票的价值=2.360×(P/F,8%,1)+2.714×(P/F,8%,2)+2.985/8%×(P/F,8%,2)=36.5(元)
(2)30=2.360×(P/F,rd,1)+2.714×(P/F,rd,2)+2.985/rd×(P/F,rd,2)
rd=10%,2.360×(P/F,10%,1)+2.714×(P/F,10%,2)+2.985/10%×(P/F,10%,2)=29.0564(元)
rd=9%,2.360×(P/F,9%,1)+2.714×(P/F,9%,2)+2.985/9%×(P/F,9%,2)=32.3658(元)
(rd-9%)/(10%-9%)=(30-32.3658)/(29.0564-32.3658)
rd=9.71%。