34 min listen
Replicating Anomalies in Financial Markets with Hou, Xue, and Zhang
Replicating Anomalies in Financial Markets with Hou, Xue, and Zhang
ratings:
Length:
36 minutes
Released:
Jun 30, 2017
Format:
Podcast episode
Description
In this episode, I have three guests on the show with me: Kewei Hou of Ohio State University, Chen Xue of the University of Cincinnati, and Lu Zhang of Ohio State University. Kewei, Chen, and Lu have coauthored a paper titled "Replicating Anomalies," a large-scale replication study that re-tests hundreds of so-called "anomalies" in financial markets. An anomaly is a predictable pattern in stock returns, or stated differently, it is a deviation from the efficient markets hypothesis. Their abstract reads as follows: The anomalies literature is infested with widespread p-hacking. We replicate the entire anomalies literature in finance and accounting by compiling a largest-to-date data library that contains 447 anomaly variables. With microcaps alleviated via New York Stock Exchange breakpoints and value-weighted returns, 286 anomalies (64%) including 95 out of 102 liquidity variables (93%) are insignificant at the conventional 5% level. Imposing the cutoff t-value of three raises the number of insignificance to 380 (85%). Even for the 161 significant anomalies, their magnitudes are often much lower than originally reported. Out of the 161, the q-factor model leaves 115 alphas insignificant (150 with t < 3). In all, capital markets are more efficient than previously recognized. We discuss the process of replicating these anomalies, issues involving the use of equal-weighted vs value-weighted returns, and the problems of p-hacking in finance research. Works Cited Hamermesh, Daniel S. 2007. “Replication in Economics.” Canadian Journal of Economics 40(3):715–733. Kewei Hou, Chen Xue, Lu Zhang; Digesting Anomalies: An Investment Approach. Rev Financ Stud 2015; 28 (3): 650-705. Hou, Kewei and Xue, Chen and Zhang, Lu, Replicating Anomalies (June 12, 2017). Charles A. Dice Center Working Paper No. 2017-10; Fisher College of Business Working Paper No. 2017-03-010. Other Links The Marginal Revolution post on this paper.
Released:
Jun 30, 2017
Format:
Podcast episode
Titles in the series (100)
The Austrian Cult and Mathematical Economics with Ash Navabi: In this episode, Ash Navabi discusses whether the Austrian School of Economics is a cult and the value of mathematics in economic theory. Ash is an economics student at Ryerson University. Ash wrote an article responding to recent criticisms of the... by Economics Detective Radio