开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)|3.2.5(安卓)APP下载

西红柿面 · 2025年03月24日

Resampled mean-variance optimization的优点

* 问题详情,请 查看题干

NO.PZ202212280100002001

问题如下:

In addition to traditional mean-variance analysis, Beveridge also estimates one other form of portfolio optimization: the resampled efficient frontier approach. The board of trustees also asks Beveridge whether an asset/liability management (ALM) approach to strategic asset allocation would be appropriate. The board notes that the pension plan has below-average risk tolerance.


i. Identify two advantages of the resampled efficient frontier approach relative to the traditional mean-variance efficient frontier approach.

选项:

解释:

The advantages of the resampled efficient frontier approach relative to the mean-variance efficient frontier approach are:

1. the optimal portfolios resulting from the re-sampling process are more diversified;

2. the optimal portfolio weights from the re-sampled portfolios are more stable through time.

因为本身Optimization的次数增多(有多次估计),EF的估计更加准确和Stable,所以Resampling是否可以Reduce turnover and transaction costs?

1 个答案

Lucky_品职助教 · 2025年03月25日

嗨,努力学习的PZer你好:


从理论上来说,Resampling可以在一定程度上降低turnover和交易成本。

Resampling EF得到的最优投资组合权重在时间上更为稳定。这意味着随着时间推移,投资组合不需要频繁调整,而换手率通常反映了投资组合资产买卖的频繁程度。由于组合权重稳定,资产买卖操作减少,从而降低了换手率,相应地也降低了交易成本。MVO方法可能因参数估计的微小变化,就需要大幅调整投资组合权重,频繁买卖资产;而重采样方法下,这种情况会减少。

Resampling过程得到的最优投资组合更加多样化。多样化的投资组合通常可以更好地分散风险,使得投资组合对市场波动的敏感度降低。这会减少为应对市场变化而进行的交易,进而降低换手率和交易成本。

----------------------------------------------
加油吧,让我们一起遇见更好的自己!