17:02 (2X)
助教好,请问statement 3后半句如何理解?前半句可以理解。
the longer she waits to purchase the annuity 意思是她越晚买年金吗?如果她越晚买年金,那么N变小,因此PMT变大、income yield变大,这样以来就不符合statement 3说的“reduced by greater amounts”了。
王暄_品职助教 · 2024年04月17日
Statement 3分两部分理解:
1. If Janice were to add a 10-year period certain option to her annuity, her income yield would be reduced when compared to not having the option,
如果一个人买了一个年金,但是同时他又买了个10-year period certain,那么就是即使他买完年没几年就死了,他依然可以拿到10年的年金。所以是增加了N,增加了N,则PMT下降,则yield income下降。
2. but it would be reduced by greater amounts the longer she waits to purchase the annuity.
后半句:
比如一个人30岁买annuity with 10-year period certain,她努力活到40岁对他没什么问题,所以30岁的时候买年annuity with 10-year period certain没什么意义,N不会被拉长
如果这人83岁买annuity with 10-year period certain,85岁就死,N原本=2,那么现在被拉长成了10,N上升,PMT下降。
这个statement的后半句想表达的是这个意思,确实不够清晰