比特币与国际投资组合:均值方差、CVaR 与状态切换
文章 arXiv papers · 作者: Mohammadreza Mahmoudi
总结
本文使用均值方差优化、条件风险价值和马尔可夫状态切换,评估加入比特币对国际多元化投资组合的影响。前两种框架显示,比特币可以改善多元化,但作者指出,这些方法依赖线性收益关系和正态收益分布。比特币收益不同时满足这两个假设,因此研究进一步提出状态切换方法。
所提出的模型根据资产收益识别两种状态:熊市状态下均值较低、波动率较高;牛市状态下均值较高、波动率较低。摘录没有报告状态切换模型的投资组合表现,也未量化比特币在该方法下的最终贡献。此外,文中没有提供样本细节或实施假设,因此应将所述的多元化效果理解为仅适用于最初的两种框架,而非最终方法得出的确定性结论。
核心观点
- 研究比较均值方差、CVaR 和马尔可夫状态切换方法在包含比特币的国际资产配置中的应用。
- 均值方差和 CVaR 的结果表明,比特币改善了所分析投资组合的多元化程度。
- 这些传统框架假设收益关系为线性且收益服从正态分布。
- 状态切换方法识别出收益和波动率特征不同的熊市与牛市状态。
- 摘录未说明最终模型的投资组合表现或稳健性结果。
标签
全文
# 2205.00335 # Evaluating the Impact of Bitcoin on International Asset Allocation using Mean-Variance, Conditional Value-at-Risk (CVaR), and Markov Regime Switching Approaches This paper aims to analyze the effect of Bitcoin on portfolio optimization using mean-variance, conditional value-at-risk (CVaR), and Markov regime switching approaches. I assessed each approach and developed the next based on the prior approach's weaknesses until I ended with a high level of confidence in the final approach. Though the results of mean-variance and CVaR frameworks indicate that Bitcoin improves the diversification of a well-diversified international portfolio, they assume that assets' returns are developed linearly and normally distributed. However, the Bitcoin return does not have both of these characteristics. Due to this, I developed a Markov regime switching approach to analyze the effect of Bitcoin on an international portfolio performance. The results show that there are two regimes based on the assets' returns: 1- bear state, where returns have low means and high volatility, 2- bull state, where returns have high means and low volatility.
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