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胡weiwei · 2018年09月29日

问一道题:NO.PZ2015120604000170 [ CFA I ]

问题如下图:

选项:

A.

B.

C.

解释:

为什么第二步中n=14而不是15

2 个答案
已采纳答案

菲菲_品职助教 · 2018年09月30日

同学你好,这道题目说的是,AJ从现在开始每年存一笔钱一直到第十五年开始交他孩子的学费,相当于T=15时开始有PMT的支出,持续四年,到T=18时全部付完学费。Step1算出来的PV其实是将T=15、16、17、18时的这四笔PMT折现到T=14这个时间点,所以这个PV=PV14。导致Step2里面的N=14而不是15。这道题目画个图会更加清晰一点,也便于你的理解。

加油~

蓝莓囡囡骑士 · 2018年11月20日

请问 我第一步 可以算 第15 年 的先付年金吗。如果可以的话 最终答案 还是不一样 

菲菲_品职助教 · 2018年11月20日

因为AJ是在每年年末存一笔钱,存到第14年末为止。所以你用先付年金算出来的其实是T=15时刻的PV,应该再往前折一年,再进行第二步的计算,才能得到正确答案。

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NO.PZ2015120604000170问题如下 A.J. plans to phis chils tuition fee for four years starting 15 years from now. He estimates the fees is $22,000 per year. If the saving account interest rate is 5.5% annually, anhow mupayment A.J. shoulmake the enof eayefrom now? A.$3,441.23B.$3,800.07C.$4,009.08B is correct.Step 1: N = 4, FV = 0, I/Y = 5.5, PMT = 22,000, CPT PV = -77,113.30Step 2: PV =0, N = 14, I/Y = 5.5, FV = 77,113.30, CPT PMT =-$3,800.07老师,我发现我做类似的题最容易做错的部分就是前面一个时间段短年份数,就像这道题,我就会按照15年来计算。

2023-07-21 11:57 1 · 回答

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2023-06-08 19:57 1 · 回答

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2023-04-22 10:01 1 · 回答

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2023-02-03 14:57 2 · 回答

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2022-12-19 14:01 3 · 回答