(0.25*50+0.40*60+0.35*70+4-55)/55=(12.5+24+24.5+4-55)/55=10/55=18.18%一年的预期股价是0.25*50+0.40*60+0.35*70=61美元股利是4美元加起来是65美元,投资是55美元因此一年的预期投资报酬率为(65-55)/55=18.18%
(0.25*50+0.4*60+0.35*70-55+4)/55=18.18%
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