Asset-pricing anomalies at the firm level
公司层面的资产定价异象AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究公司层面的 CAPM alpha、资产定价异象及多因子模型解释力,对应资产定价与金融因子。
公司层面的资产定价异象AI 解读 ↓
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We introduce a hierarchical Bayes approach to model conditional firm-level alphas as a function of firm characteristics. Our empirical framework is motivated by growing concerns in the literature regarding the reliability of inferences from portfolio-based methods. In our initial tests, we confirm the existence of several CAPM anomalies at the firm level. Prominent multifactor models deliver only a modest improvement, however, as they often resolve only those anomalies which are directly linked to their additional factors. Further results suggest that the economic importance of CAPM anomalies is overstated. We find that anomalies are primarily confined to small stocks, few characteristics are associated with CAPM alphas out of sample, and many firm characteristics do not contain unique information about abnormal returns.