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IanZQ · 2023年07月09日

but it would be reduced by greater amounts the longer she waits

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NO.PZ202301041000002206

问题如下:

Which of Boylan’s statements about life annuities is least accurate?

选项:

A.

Statement 2

B.

Statement 1

C.

Statement 3

解释:

Statement 1 is incorrect: since they are both the same age, Jason will receive a higher income yield than his sister as females have a longer average life expectancy than males and therefore a longer expected payout period.

but it would be reduced by greater amounts the longer she waits to purchase the annuity.。 等待越久,岂不是N减少了,PMT应该变大啊~

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王暄_品职助教 · 2023年07月10日

Statement 3的后半句描述不够清晰

这句话的含义就是,

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想表达的是这个意思。其实这个Statement确实表达的不咋清晰

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