讲座题目:Beta Uncertainty as an Arbitrage Barrier and the Level of Anomaly Returns(贝塔不确定性作为套利障碍和异常收益水平)
主 讲 人:韩豫峰 北卡罗来纳大学夏洛特分校
讲座时间:2024年6月11日15:30
讲座地点:学院319
讲座内容摘要:
With uncertainty surrounding risk loadings (beta uncertainty) arbitrageurs allocate less arbitrage capital to anomalies. In this paper, we introduce a Bayesian market model that explicitly accommodates separate random processes for beta and idiosyncratic volatility to estimate beta uncertainty in anomaly portfolios. The formulation avoids the pitfalls of conventional estimation that generates high correlation between beta uncertainty and idiosyncratic risk. We provide evidence that beta uncertainty serves as a barrier to arbitrage, slowing down active investment and thus is positively associated with future anomaly returns. We extend the analysis to the firm level and show that beta uncertainty amplifies the effect of the mispricing score on stock returns and reduces short-selling transactions.
在风险加权(贝塔不确定性)存在不确定性的情况下,套利者会将较少的套利资本分配给异常现象。在这篇论文中,我们引入了一个贝叶斯市场模型,该模型明确地将贝塔和特有波动性分离为不同的随机过程,以估计异常组合的贝塔不确定性。这种形式避免了传统估计方法的缺点,即在贝塔不确定性和特有风险之间产生高相关性。我们提供了证据表明,贝塔不确定性作为套利的障碍,减缓了主动投资,因此与未来的异常收益呈正相关。我们将分析扩展到公司层面,并表明贝塔不确定性会放大误定价分数对股票收益的影响,并减少卖空交易。
主讲人学术简介:
韩豫峰,北卡罗来纳大学夏洛特分校 (University of North Carolina at Charlotte)金融系教授,美国华盛顿大学 (Washington University in St. Louis) 金融学博士。韩教授加入北卡罗来纳大学夏洛特分校前分别在美国杜兰大学和科罗拉多大学丹佛分校任职。研究领域包括实证资产定价、投资、公募基金和计量学。研究论文发表于Review of Financial Studies, Journal of Financial Economics, Journal of Financial and Quantitative Analysis, Journal of Banking and Finance, Real Estate Economics等金融经济学期刊。