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粉红豹 · 2018年10月12日

问一道题:NO.PZ2016010802000206 [ CFA I ]

问题如下图:

    

选项:

A.

B.

C.

解释:


老师。。。这道题完全不懂得什么意思。我以为是用1.45*1.08 = 1.566。算出来不对,解释也不是很懂。。。哭晕。。。

4 个答案

粉红豹 · 2018年10月13日

老师,我准备以后这种题全部用  一美元兑换多少人民币   方式去理解,方便我不搞晕。

比如 RMB/$ 从 6 到7,理解为 美元从6rmb 升值到了 7rmb;因此有些题目问$升值多少percentage,就用(7-6)/6 算;如果算人民币,那就 (1/6 - 1/7) / (1/6) 负号代表贬值。

这题中说Y升值,就认为美元升值了,那么能换更多人民币,那么就是 从a X/美元  变成了 (1+8%)a X/美元

这样ok哇?

答疑助手丽丽 · 2018年10月13日

感觉手写应该更好理解,有不懂再问~

粉红豹 · 2018年10月13日

终于懂了,哭好了,😀

答疑助手丽丽 · 2018年10月13日

题目中说base currency升值了8%,两国汇率上升到了1.45.

也就是说Y在原来的基础上升值了8%,原来是a X/Y, 升值后是(1+8%)a  X/Y

升值后汇率是1.45(题中给出的条件),那么就是(1+8%)a=1.45

有理解吗~

粉红豹 · 2018年10月13日

这句话不理解,¥¥¥¥原来是a X/Y, 升值后是(1+8%)a X/Y¥¥¥¥,我认为是 a/(1+8%) X/Y, 因为Y在分母上。所以怎么理解?

答疑助手丽丽 · 2018年10月12日

这道题的表达形式可写成  a X/Y, 这个表示的意思就是1个Y可以换a个X,现在题目中说base currency上升到8%,也就是Y上升了,那么表达形式就为 (1+8%)a   X/Y, 此时(1+8%)a =1.45

粉红豹 · 2018年10月12日

前面都懂,最后一句话 # 表达形式就为 (1+8%)a X/Y, 此时(1+8%)a =1.45 # 不懂,哭晕第二次。。。

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