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为了求职冲呀 · 2020年03月08日

问一道题:NO.PZ2017092702000104

问题如下:

The price of a stock at t = 0 is $208.25 and at t = 1 is $186.75. The continuously compounded rate of return for the stock from t = 0 to t = 1 is closest to:

选项:

A.

–10.90%.

B.

–10.32%.

C.

11.51%.

解释:

A is correct.

The continuously compounded return from t = 0 to t = 1 is r0,1 = ln(S1/S0) = ln (186.75/208.25) = –0.10897 = –10.90%.

请问下在计算器里面这个怎么按?先按Ln出现的是error 2, 如果先按186.75/208.25再按Ln出来的结果是5.338。麻烦老师告知按计算器步骤

1 个答案

星星_品职助教 · 2020年03月09日

同学你好,

1. 不能先按Ln,要先按数字

2. 不能直接186.75/208.25,Ln,这样的结果是186.75/Ln208.25

3. 正确按法是先按186.75/208.25=0.8968,然后按Ln,相当于计算Ln0.8968=-0.1090,即A选项