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ask123 · 2019年07月22日

问一道题：NO.PZ2015120604000011

  1. CFA I
  2. Quantitative

问题如下图：

    

选项：

A.

B.

C.

解释：


想问下为什么有的时候PMT的正负号会影响计算结果但是有的时候不会呢 就是有的时候如果正负号弄错的话 计算器会显示ERROR 谢谢帮助

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1 个答案

污叫兽 · 2019年07月22日

因为正负号反应的是现金流的流动方向，流出或者流入~做题的时候，我们关注数据会多一些，尤其是计算题，所以不太关注流动的方向~但实际上非常容易理解，比如PMT是每一期资金的需要流出的流量，流出了就要从钱包里把这笔钱扣掉，所以用负号~如果按计算器时可以反应得过来，就直接把负号按上，如果反应不过来提示错误了，将已知条件给出的PV FV PMT其中一个改变负号即可~从做题的角度来说，这样即可获得正确的计算数据~希望有帮到你，加油~

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