请根据以下资料回答：
某投资者准备投资购买股票，现有A、B两家公司可供选择，从A、B公司的有关会计报表及补充资料中获知，A公司发放的每股股利为5元，股票每股市价为30元；B公司发放的每股股利为2元，股票每股市价为20元。预期A公司未来年度内股利恒定；预期B公司股利将持续增长，年增长率为4%，假定目前无风险收益率为8%，市场上所有股票的平均收益率为12%，A公司股票的β系数为2，B公司股票的β系数为1.5。
若投资购买两种股票各100股，该投资组合的综合β系数为______。
A．1.5
B．1.6
C．1.7
D．1.8
参考答案：D
解析： [*]
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The psychologist looked over them for a while ,and then he said， “They can 小题3: be helped.” He told the parents to prepare a room filled with all the 小题4: that a boy could want .They should put the pessimist boy in that room and 小题5: him to enjoy life. They also needed to 小题6: another room and fill it with horse manure(马粪). They should put the optimist boy in that room. They 小题7: this, and then watched both boys through one-way mirrors. The pessimist continued to be a pessimist. He said that he had 小题8: one to play with. They went to look at the optimist, and were 小题9: to see him digging through the manure. The psychologist ran into the room and asked 小题10: the boy was doing. He looked up through the manure and said， “I am sure there must be a horse in the room somewhere.” |