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Anomaly Discovery and Arbitrage Trading

Published online by Cambridge University Press:  20 February 2023

Xi Dong
Affiliation:
City University of New York Baruch College xi.dong@baruch.cuny.edu
Qi Liu*
Affiliation:
Peking University Guanghua School of Management
Lei Lu
Affiliation:
University of Manitoba Asper School of Business lei.lu@umanitoba.ca
Bo Sun
Affiliation:
University of Virginia Darden School of Business sunb@darden.virginia.edu
Hongjun Yan
Affiliation:
DePaul University Driehaus College of Business hongjun.yan.2011@gmail.com
*
qiliu@gsm.pku.edu.cn (corresponding author)
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Abstract

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We analyze a model in which an anomaly is unknown to arbitrageurs until its discovery, and test the model implications on both asset prices and arbitrageurs’ trading activities. Using data on 99 anomalies documented in the existing literature, we find that the discovery of an anomaly reduces the correlation between the returns of its decile-1 and decile-10 portfolios. This discovery effect is stronger if the aggregate wealth of hedge funds is more volatile. Finally, hedge funds increase (reverse) their positions in exploiting anomalies when their aggregate wealth increases (decreases), further suggesting that these discovery effects operate through arbitrage trading.

Information

Type
Research Article
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of the Michael G. Foster School of Business, University of Washington
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