Risk premium的公式不是Rm-Rf吗？解析里的公式是什么呢？好像没见过，这俩有什么区别？谢谢
问题如下图：
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解释：
NO.PZ2015121801000137问题如下analyst observes the following historic geometric returns: The risk premium for equities is closest to: A.5.4%. B.5.5%. C.5.6%. A is correct. (1 + 0.080)/(1 + 0.0250) – 1 = 5.4% 如题，求老师帮忙解惑。另外，考点目前应该在基础课哪里？
NO.PZ2015121801000137问题如下analyst observes the following historic geometric returns: The risk premium for equities is closest to: A.5.4%. B.5.5%. C.5.6%. A is correct. (1 + 0.080)/(1 + 0.0250) – 1 = 5.4% 如题，不好意思我记得数量里有相关等式介绍，请问数量里在基础课哪里？
NO.PZ2015121801000137 问题如下 analyst observes the following historic geometric returns: The risk premium for equities is closest to: A.5.4%. B.5.5%. C.5.6%. A is correct. (1 + 0.080)/(1 + 0.0250) – 1 = 5.4% 为什么不能直接rm-rf?
NO.PZ2015121801000137 问题如下 analyst observes the following historic geometric returns: The risk premium for equities is closest to: A.5.4%. B.5.5%. C.5.6%. A is correct. (1 + 0.080)/(1 + 0.0250) – 1 = 5.4% 老师好，请问这个题目所涉及的知识点是在哪个章节哪个视频里面？
NO.PZ2015121801000137问题如下analyst observes the following historic geometric returns: The risk premium for equities is closest to: A.5.4%. B.5.5%. C.5.6%. A is correct. (1 + 0.080)/(1 + 0.0250) – 1 = 5.4% 请问这个题是这个章节的嘛？麻烦指明出处谢谢
