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Short sellers and insider trading profitability: A natural experiment
Affiliation:1. School of Accountancy, Singapore Management University, Singapore 178900, Singapore;2. School of Economics and Management, Tsinghua University, Beijing 100084, China;1. Dhaliwal-Reidy School of Accountancy, University of Arizona, 1130 E. Helen St., PO Box 210108, Tucson, AZ 85721, United States;2. LeBow College of Business, Drexel University, Philadelphia, PA 19104, United States;3. Neeley School of Business, Texas Christian University, Fort Worth, TX 76129, United States;1. Lynn Pippenger School of Accountancy, Muma College of Business, University of South Florida, 4202 East Fowler Ave., BSN 3403, Tampa, FL 33620, United States;2. Department of Accounting and Finance, Paul College of Business and Economics, University of New Hampshire, 11 Garrison Ave., Durham, NH 03824, United States;1. Hershel Anderson Endowed Professor, Department of Accounting, G. Brint Ryan College of Business, University of North Texas, Denton, TX 76201, United States;2. Department of Accountancy and Business Law, Cameron School of Business, University of North Carolina Wilmington, Wilmington, NC 28403, United States;1. College of Business, North Dakota State University, 811 2nd Ave. N., Fargo, ND 58108-6050, USA;2. Dhillon School of Business, University of Lethbridge, 345 – 6 Ave S.E., Calgary, Alberta T2G 4V1, Canada
Abstract:We examine the impact of short sellers on insider trading profitability using a natural experiment of a pilot program which relaxed short-selling constraints for randomly selected pilot stocks. We find that pilot firms experienced a significant decrease in insider trading profitability during the pilot program. The results are more pronounced for the pilot firms with poor information quality, and for the pilot firms without corporate restrictions on insider trading. Our evidence suggests that short sellers serve an important market disciplinary role by reducing insider trading profitability.
Keywords:Short sellers  Insider trading  Government regulation  M41  G14  G18
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