NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Mengli Sha

Department of Economics
The Pennsylvania State University

E-Mail: EmailAddress: hidden: you can email any NBER-related person as first underscore last at nber dot org
Institutional Affiliation: The Pennsylvania State University

NBER Working Papers and Publications

May 2019Rationalizing Trading Frequency and Returns: Maybe Trading is Good for You
with Yosef Bonaparte, Russell Cooper: w25838
Barber and Odean (2000) find that households who trade more have a lower net return than others and attribute this pattern to irrationality, particularly overconfidence. In contrast, we find that household financial choices generated from a dynamic optimization problem with rational agents and portfolio adjustment costs can reproduce the observed pattern of households with large turnover having lower net returns. Various forms of irrationality, modeled as beliefs about income and return processes that are not data based, do not improve the ability of the baseline model to explain these turnover and net returns patterns.
 
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