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一只可爱的猪 · 2020年02月28日

问一道题：NO.PZ2018062003000206

  1. CFA I
  2. Economics Analysis

问题如下：

Assume that the exchange rate between CAD and USD has decreased to 1.5800. If the USD has depreciated by 5% against the price currency, which of the initial exchange rate is the most accurate between CAD and USD?

选项：

A.

1.5048.

B.

1.6632.

C.

0.6646.

解释：

B is correct.

1.5800/initial rate = 1-0.05

initial rate=1.58/0.95 = 1.6632.

考点： Percentage Change in A Currency

解析:

1.5800/初始汇率= 1-0.05

初始汇率=1.58/0.95 = 1.6632.

为什么这样做是错的？

CAD/USD=A initial rate 当USD贬值后，变成了1.58

USD=1/A CAD

贬值： USD=1/A *(1-5%) CAD

变成了CAD/USD=1.58 也就是USD=1/1.58CAD

1/1.58CAD=1/A *(1-5%) CAD

A=1.5010

添加评论
Glanda · 2020年11月02日

巧了，我也是这么想的。。。

2 个答案

源_品职助教 · 2020年03月03日

同学，你的做法我还是看不懂

当USD贬值后 , 变成了1.58 USD=1/A CAD，这里我就不懂了为什么会变成这样。这里应该没有道理。而且你写的标价方式也不是标准的标价方式。

我们已经给出了正确的解法，所以你不用纠结于自己的方法，记住正确的做法就好了。

 

源_品职助教 · 2020年02月28日

嗨，从没放弃的小努力你好：


同学，抱歉，我没看懂你写的表达形式和意思。


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一只可爱的猪 · 2020年03月02日

这是我的做法：CAD/USD=A initial rate 当USD贬值后，变成了1.58 USD=1/A CAD 贬值： USD=1/A *(1-5%) CAD 变成了CAD/USD=1.58 也就是USD=1/1.58CAD 1/1.58CAD=1/A *(1-5%) CAD A=1.5010

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