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Dancy · 2024年01月20日

不明白为什么这么做具件解释一下

  1. CFA I
  2. Economics Analysis

NO.PZ2023071902000087

问题如下：

Question

A researcher compiles the following currency exchange data:

A/B C/B

Start of period 1.3578 110.24

Close of period 1.3286 109.52

For the duration, the closest percentage variation in the C/A cross-rate is:

选项：

A.–2.5%.

B.1.5%.

C.3.6%.

解释：

Solution

The C/A exchange rate at the beginning of the period is calculated as = 1/1.3578 × 110.24 =81.19

The C/A rate at the end of the period is = 1/1.3286 × 109.52 = 82.43

The percentage change in the C/A exchange rate for the period is therefore = 82.42/81.19 - 1 ≈ 1.5% which is approximately 1.5%

Exchange Rate Calculations

•

交叉汇率的计算为什么不先用C ／B除A ／B

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1 个答案

笛子_品职助教 · 2024年01月22日

嗨，从没放弃的小努力你好：


 交叉汇率的计算为什么不先用C ／B除A ／B

Hello，亲爱的同学~

同学这里理解正确。

交叉汇率的计算，用的就是C ／B除A ／B。

本题的解题过程，与同学的理解，是一致的。


C/A =( C/B) /(A/B)

因此：

start：  110.24/ 1.3578，这也就是本题解析里的1/1.3578 × 110.24

Close： 109.52/1.3286，这也就是本题解析里的1/1.3286 × 109.52

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虽然现在很辛苦，但努力过的感觉真的很好，加油！

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