The Policy Effects of Lifting the Short-Sale Price Restriction on Stock Price Behaviors

Shih-Ju Chan, Ching-Chung Lin and Wen-Hsiu Kuo
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Shih-Ju Chan: Department of International Business, Kao Yuan University, Taiwan
Ching-Chung Lin: Department of Business Administration, Kao Yuan University, Taiwan
Wen-Hsiu Kuo: Department of Finance, Tainan University of Technology, Taiwan

Journal of Economics and Management, 2008, vol. 4, issue 2, 203-228

Abstract: The restriction of short-sale prices, which stated that short-sale prices must not be lower than the closing price of the previous trading day, no longer applies to the constituent stocks of the Taiwan Top 50 Index. This study investigates the abnormal returns and volatility changes of those component stocks. The empirical results show that, after the removal of this price restriction, no significant cumulative abnormal return has been found, while the volatilities of those component stocks have increased significantly. Moreover, stocks with a lower percentage of margin transactions experience higher volatility. To reduce the possible impact on volatility, the authorities may take the activity of margin transactions into account when considering whether to apply this policy to more stocks in the future. Thus, reducing investors' risks and increasing information flow can be achieved simultaneously.

Keywords: abnormal return; short sales; Taiwan 50 Index; volatility (search for similar items in EconPapers)
JEL-codes: G11 G12 G14 (search for similar items in EconPapers)
Date: 2008
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:jec:journl:v:4:y:2008:i:2:p:203-228

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