Testing Alphas in Conditional Time-Varying Factor Models With High-Dimensional Assets
高维资产条件时变因子模型中的 Alpha 检验AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要以金融因子模型中的 alpha 和因子载荷检验为核心,并比较 CAPM 与三因子模型,因此对应金融因子与资产定价。
高维资产条件时变因子模型中的 Alpha 检验AI 解读 ↓
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For conditional time-varying factor models with high-dimensional assets, this article proposes a high-dimensional alpha (HDA) test to assess whether there exist abnormal returns on securities (or portfolios) over the theoretical expected returns. To employ this test effectively, a constant coefficient test is also introduced. It examines the validity of constant alphas and factor loadings. Simulation studies and an empirical example are presented to illustrate the finite sample performance and the usefulness of the proposed tests. Using the HDA test, the empirical example demonstrates that the FF three-factor model is better than CAPM in explaining the mean-variance efficiency of both the Chinese and U.S. stock markets. Furthermore, our results suggest that the U.S. stock market is more efficient in terms of mean-variance efficiency than the Chinese stock market. Supplementary materials for this article are available online.