Are Short Selling Restrictions Effective?
Are Short Selling Restrictions Effective?∗ Yashar H. Barardehi Andrew Bird Stephen A. Karolyi Thomas G. Ruchti November 30, 2018 Abstract We exploit SEC Rule 201 to study the price and trading effects of short selling restric- tions. The policy requires exchanges to implement an uptick rule until the next day's market close for stocks that cross a −10% intraday return threshold, generating rare quasi-experimental variation in short selling restrictions. On average, these restrictions increase daily returns by 30.6 bps, reduce seller-initiated volume by 4.5%, and increase off-exchange volume by 1.7%. These direct effects, which contrast with the extant literature, are concentrated in down markets, suggesting that the rule is most effective in periods of most concern to regulators. However, consistent with the substitution of potential short sales, we find significant offsetting spillover effects for peer stocks. Together, our findings yield new and timely policy implications and contribute to our understanding of short seller behavior. JEL Classification: G12, G14. Keywords: short selling, uptick rule, securities regulation, Rule 201, short-sale restrictions ∗We are grateful for comments received from Rui Albuequerque, Torben Andersen, Kelley Bergsma, Dan Bernhardt, Julio Crego, Arthur Denzau, Hans Degryse, Brent Glover, Peter Haslag, Burton Hollifield, Eric Hughson, Olivia Huseman, Tim Johnson, Nikolaos Karagiannis, Daniel Karney, Stefan Lewellen, Zhi Li, Vitaly Meursault, Nate Neligh, Lars Nord´en,Dave Porter, John Ritter, Michael Schneider, Duane Seppi, Timothy Shields, Esad Smajlbegovic (discussant), Dustin Tracy, Marc Weidenmier, Andrew Zhang, and seminar participants at Carnegie Mellon University, Chapman University, Ohio University, Oklahoma, and SAFE Market Microstructure 2018.
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