Why surplus optimization approach links assets and the present value of liabilities through a correlation coefficient? but two-portfolio doesn't require the input? i thought surplus is just to do the MVO on (Va-Vl)?
郭静_品职助教 · 2022年03月31日
嗨,努力学习的PZer你好:
一、CORRELATION coefficient 正如描述所说,是资产与负债之间的相关性系数。surplus optimization approach是MVO方法的延伸,MVO方法中的input有expected return, volatility, correlation,基于这些input画出有效前沿,在有效前沿上找出对于投资者来说utility最大的组合,所以surplus optimization approach也需要这三个input。
二、two-portfolio model指的是hedging/return-seeking portfolio,这种方法将资产端分成两部分,一部分用来hedging,与liability的现金流做匹配,所以称为hedging portfolio;另一部分用来return-seeking,是富余的资金,所以可以投资激进,称为return-seeking portfolio。这种方法的使用过程中没有用到correlation这个系数,所以does not require this input.
----------------------------------------------虽然现在很辛苦,但努力过的感觉真的很好,加油!
ǎng-áng💗 · 2022年04月02日
Okay. but isn't the correlation in MvO is the correlation between asset classes?