王思祺 · 2020年08月01日
问题如下：
Lucy believes that after retirement she will need about $2 million totally for her daily expenses. At present, she has $1million investment at a stated annual interest rate of 2.5%. Assuming compounded daily, how long does it take for Lucy to have enough money for retirement life?
选项：
A.27.73 years
B.28.07 years
C.26.48 years
解释：
A is correct.
EAR=(1+0.025/365)365-1=0.02531
$1million*(1+0.02531)N =$2million, N=27.73 years.
星星_品职助教 · 2020年08月01日
同学你好，
这张图你的列式和算法都没有问题，计算出来就是答案的结果。
但这种思路并不是CFA中解题的思路。一般用的思路就是直接按计算器就可以 PV=-1，PMT=0，FV=2，I/Y=2.531（EAR转化后的结果），CPT N=27.73直接得到答案。实际上你列的式子就是以上按键背后的思路。，但直接用计算器远比列式的这种方式快捷。
J · 2021年01月29日
星星助教你好，我也是用的上面同学所写的公示计算，可是答案并不在选项中，请求帮助。 1(1+2.5%/365)^365*N = 2 365N* Ln(1+2.5%/365) = Ln 2 365N * 0.000068 = 0.693147 N = 27.92
NO.PZ2018062016000006 问题如下 Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life? A.27.73 years B.28.07 years C.26.48 years A is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years. EAR为什么是2.531，不是2.5，这里I/Y为什么需要转换
NO.PZ2018062016000006问题如下Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life?A.27.73 yearsB.28.07 yearsC.26.48 yearsA is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years.求问怎么用金融计算器计算～
NO.PZ2018062016000006问题如下 Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life?A.27.73 yearsB.28.07 yearsC.26.48 yearsA is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years.请问这题能用试错法计算吗，如果能的话要怎么算，谢谢
NO.PZ2018062016000006 问题如下 Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life? A.27.73 years B.28.07 years C.26.48 years A is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years. 为什么FV是-1不是1呢？
NO.PZ2018062016000006 问题如下 Lubelieves thafter retirement she will neeabout $2 million totally for her ily expenses. present, she h$1million investment a stateannuinterest rate of 2.5%. Assuming compounily, how long es it take for Luto have enough money for retirement life? A.27.73 years B.28.07 years C.26.48 years A is correct.EAR=(1+0.025/365)365-1=0.02531$1million*(1+0.02531)N =$2million, N=27.73 years. 同题目，这题我代入FV=2, PV=-1,I/Y=2.5,PMT=0，最后算出来的就是28.07，请问这个思路为什么错了呢？
