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tiaotiao · 2023年07月31日

surplus optimization是不需要asset大于liability的么?它和hedging/return seek

NO.PZ2022122801000041

问题如下:

PZ is the sponsor of a $1.25 billion legacy DB plan, which is now frozen. The funded ratio is 0.8. The plan sponsor, receives three asset allocation approaches recommendations:

a surplus optimization approach.

an integrated asset–liability approach.

a hedging/return-seeking portfolios approach.

When evaluate asset allocation choices, consider the plan sponsor’s costs.

Determine which asset allocation approach would be most appropriate for the pension fund. Justify your response.

选项:

解释:

Surplus optimization approach is the most appropriate.

Surplus optimization does not require an overfunded status, while implementation of the basic two-portfolio approach depends on having an overfunded plan.

Integrating the liability portfolio with the asset portfolio, is the most comprehensive of the three approaches, but increased complexity.

surplus optimization是不需要asset大于liability的么?它和hedging/return seeking在这个题目中有什么差异?

1 个答案

lynn_品职助教 · 2023年07月31日

嗨,从没放弃的小努力你好:


surplus optimization是不需要asset大于liability的么?它和hedging/return seeking在这个题目中有什么差异?


不需要


这里需要将hedge/return seeking和Surplus optimization做一个区分,总的来说Surplus optimization中是将A-L得到的surplus看做一个整体,本质上是对组合的surplus进行最优化求解,求的是surplus的效用最大化。如果underfunded,surplus为负,这个方法的目的就是缩小负值。

 

而hedge/return seeking则是将一块蛋糕切成两块,变成hedging portfolio(A=L)和return-seeking portfolio(A>L),hedging部分用于cover liability,return-seeking部分追求收益。overfunded是hedge/return seeking的必要条件,同时也是这个方法的缺点。

 

差异就是正负。

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