小同学2018-11-18 08:43:30
关于B选项,题干中表示Given that the returns on the market index are greater than risk-free rate, we can conclude: E(RM) > RF. E(RM) – RF > 0,当beta 为负时,无风险利率增加,怎么能得出回报也会增加呢?
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Robin Ma2018-11-19 17:33:48
同学你好,这个式子右边第一个也是rf,你展开后就是(1+β)*rf 万一β是负2的时候,无风险利率越大,你反而亏损的越多
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