Higher order moments of the estimated tangency portfolio weights.

Higher order moments of the estimated tangency portfolio weights.
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DOI:
10.1080/02664763.2020.1736523
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发表时间:
2021
影响因子:
1.5
通讯作者:
Ngailo, Edward
Ngailo, Edward
中科院分区:
数学4区
文献类型:
--
作者:
Javed, Farrukh;Mazur, Stepan;Ngailo, Edward

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在本文中,我们考虑切线投资组合的估计权重。我们推导出的高阶非中心和中心的时刻,这些权重的解析表达式时,回报率被假定为独立和多元正态分布。此外,估计的权重的均值,方差,偏度和峰度的表达式得到封闭的形式。后来,我们补充我们的结果与模拟研究,其中数据从多元正态分布和t-分布进行模拟,并估计权重的前四个时刻通过使用蒙特卡洛实验计算。值得一提的是,收益的分布假设被发现是重要的,特别是对于前两个时刻。最后,通过对纳斯达克上市的四个金融指数收益率的实证分析,我们观察到了时间动力学在高阶矩的存在。
In this paper, we consider the estimated weights of the tangency portfolio. We derive analytical expressions for the higher order non-central and central moments of these weights when the returns are assumed to be independently and multivariate normally distributed. Moreover, the expressions for mean, variance, skewness and kurtosis of the estimated weights are obtained in closed forms. Later, we complement our results with a simulation study where data from the multivariate normal and t-distributions are simulated, and the first four moments of estimated weights are computed by using the Monte Carlo experiment. It is noteworthy to mention that the distributional assumption of returns is found to be important, especially for the first two moments. Finally, through an empirical illustration utilizing returns of four financial indices listed in NASDAQ stock exchange, we observe the presence of time dynamics in higher moments.
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