Do Short Selling Restrictions Destabilize Stock Returns? Lessons from Taiwan
Martin T. Bohl
University of Muenster
HEC Montreal - Institute of Applied Economics
Pierre L. Siklos
Wilfrid Laurier University - School of Business & Economics
November 1, 2010
Paolo Baffi Centre Research Paper No. 2011-88
Short sellers have been routinely blamed for triggering, or exacerbating, stock market declines. The experience of Taiwan provides an interesting case study of the impact of short selling bans on stock returns volatility in a time series framework due to the length of time the short selling ban was in place there. Estimating several variants of an asymmetric GARCH model and a Markov switching GARCH model we find robust evidence that short selling restrictions raise stock returns volatility. The only qualifier is that the impact of short sale bans is a feature of the expansionary phase of business cycles. During recessions this effect dissipates.
Number of Pages in PDF File: 33
Keywords: Short-Selling Bans, Taiwanese Stock Market, Asymmetric GARCH Models, Markov Switching Models
JEL Classification: G12, G14, G18
Date posted: May 1, 2011
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