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The authors investigate the 2008-2009 short-sales ban in Korea, one of the most comprehensive and restrictive short-selling bans worldwide. The purpose of this paper is to examine: whether the ban stopped a destabilizing effect, if there was any, of short-selling activities; whether the ban improved or deteriorated the informational efficiency or the price discovery process of the stock market; and whether the ban had any impact on market liquidity.

Multiple regression; vector autoregression analysis; and generalized autoregressive conditional heteroskedasticity analysis.

The authors find no evidence that short-sales have a market-destabilizing effect and thus, restricting short-selling has a market-stabilizing effect. On the contrary, the short-selling ban is associated with an increase in return volatility and a deterioration of the price discovery process, particularly for the stocks without derivatives traded on them. The authors also find evidence of a liquidity decrease for short-sale intensive stocks. However, the evidence is inconclusive as to whether the market efficiency and liquidity changes are solely the result of the short-sales ban or the compound effects of both the ban and the concurrent progress of the financial crisis.

The literature does not provide a conclusive view on the effects of short-sales or restrictions thereof on the stock market. Also, the existing research on recent worldwide shorting bans often lack empirical scope (e.g. 32 stocks for UK; three weeks for USA). In contrast, the short-sales ban in the Korean stock market, one of the most comprehensive and restrictive short-selling bans worldwide, lasted for eight months for all the listed stocks and is still in effect for financial stocks. The authors find no evidence that short-sales have a market-destabilizing effect and thus, restricting short-selling has a market-stabilizing effect.

The paper aims to investigate the effectiveness of the ban on short trading of stocks on the London Stock Exchange, introduced in September 2008 in the immediate aftermath of the collapse of Lehman Brothers. In particular, the paper investigates how far the ban succeeded in achieving the objectives set out by the regulator, the Financial Services Authority (FSA).

The approach involves comparing the returns on a portfolio of stocks covered by the short-sales ban with a portfolio of financial stocks exempt from the ban as a control group.

The paper presents evidence to show the effects to the ban to have been mostly confined to a large first-day return. Beyond that, there is some evidence that volatility was diverted from stocks covered by the ban to those for which short-sales were still permitted. Investors seem to have been wary of buying banned stocks when good news arrived, presumably out of fear that they may be overpriced.

All event studies are subject to the curse of the counterfactual: what would have happened if the event had not occurred? The problem is especially acute here, however, because the background was the most turbulent in modern economic and financial history.

The paper shows the limited value of short-sales bans over anything beyond the very short-term.

This paper helps to inform regulatory decision-making in financial crises.

The purpose of this paper is to explore the impact of institutional trading on the market quality during the financial crisis and short sale ban.

The following methods was applied to discuss the total impact on market quality and efficiency of short sale ban in USA from 2001 to 2010. The author examined institutional ownership and breadth of ownership while performing a mean variance tests for changes in efficiency as well as multivariate analysis.

Analyzing USA, Standard and Poor’s 500 stocks the author find increase high-low volatility, realized volatility, effective spread and relative quoted spread during January 1, 2007 to December 31, 2010. Realized volatility increases for both small and large quantile stocks. High-low volatility increases for small quantile stocks and relative quoted spread increases for large quantile stocks. Comparing the percentage change between pre and climax period we find that large quantile stocks have a negative association between breadth of institutional ownership and returns and a positive relation high-low volatility, realized effective spread and quoted spread to returns.

The present paper is the first to discuss the total impact on market quality and efficiency of short sale ban in USA from 2001 to 2010. The author find a remarkable improvement in market efficiency (variance ratios) after the crisis period for small and non-financial stocks, while the price efficiency lost during the crisis period is more persistent for large and financial stocks.

The aim of this paper is to provide a review of the literature on short selling. In particular, it seeks to describe the history of short selling and anti-shorting laws. With respect to short-selling regulation, the main emphasis will be placed on the UK FSA’s regulatory action.

This paper reviews the history of short selling and the development of anti-shorting laws, particularly with regard to the UK market. It also analyses the distinct literature on short selling.

The paper argues that the development of anti-shorting laws shows that regulators are instituting a policy unfavourable to short sellers. The opposers of short selling may be seen as lacking ideas and having the tendency to ban anything they do not like. Short sellers, on the other hand, may be seen as the elite bodyguards of the financial market whose job is to get rid of overvalued stocks, and ultimately keep the market safe and efficient. For this reason, short sellers deserve our praise and thanks, not our hatred and opprobrium.

To the authors’ knowledge, this paper is the first to review the history of short selling and the development of anti-shorting laws, particularly with regard to the UK market.

The purpose of this paper is to investigate how the announcement and implementation of short sales and margin trading regulation affects Chinese stock returns and trading volume. On 31 March 2010, the Chinese regulators launched a pilot programme, allowing short sales and margin trading for 50 Shanghai Stock Exchange and 40 Shenzhen Stock Exchange stocks.

This paper uses an event study approach to compare market model abnormal returns (ARs) of the pilot firms with two distinct matched firm samples. A volume event study is also conducted to examine abnormal trading activity surrounding the key events in the pilot stocks.

Negative ARs follow both the announcement and implementation of short selling and margin trading. This suggests the negative impact of short sales dominates the positive impact of margin trading on an average. Volume also declines, which is consistent with uninformed investors’ seeking to avoid trading against informed traders.

The paper appears to be the first to address the impact of both the announcement and implementation of short selling and margin trading rule changes on returns and liquidity using individual stock data.

The purpose of this paper is to investigate the effects of the 2008 SEC short‐sell moratorium on regional bank risk and return. The paper also examines the decline in “failures to deliver” securities in the wake of SEC short‐sell moratorium.

In total, six regional bank portfolios are derived and the beta coefficients from a CAPM model are estimated using the integrated generalized autoregressive conditional heteroskedasticity (IGARCH) method accounting for the short‐sell moratorium. Data on 110 regional banks in six US regions from January 2002 to December 30, 2011 are used to estimate the model.

The ban on naked short selling and the SEC short‐sell moratorium significantly increased individual bank risk for a majority of banks in six geographic regions, but also increased return in three of three regions. There was also reduced naked short selling as failures to deliver securities declined sharply after the September 2008 moratorium took effect.

Regional banks have generally not achieved the size needed to be deemed “too big to fail” by policy‐makers. Thus, policy changes such as the SEC short‐sell moratorium might be expected to have larger effects on regional banks than on larger banks, which might be shielded from the policy change by having achieved “too big to fail” status. The authors' results are consistent with research that has shown that short‐sell restrictions increase risk by reducing liquidity and trading volume.

The purpose of this paper is to review the literature on liquidity in international stock markets, highlights differences and similarities in empirical results across existing studies, and identifies areas requiring further research.

International cross-country studies on stock market liquidity are categorized and reviewed. Important relevant single-country studies are also discussed.

Market liquidity is influenced by exchange characteristics (e.g. the presence of market makers) and regulations (e.g. short-sales constraints). The literature has identified the most appropriate liquidity measures for global research, and for emerging and frontier markets, respectively. Major empirical facts are as follows. Liquidity co-varies within and across countries. Both the liquidity level and liquidity uncertainty are priced internationally. Liquidity is positively associated with firm transparency and share issuance, and negatively related to dividends paid out. The impact of internationalization on liquidity is not universal across firms and countries. Some suggested areas for future studies include: dark pools, high-frequency trading, commonality in liquidity premium, funding liquidity, liquidity and capital structure, and liquidity and transparency.

The paper focusses on international stock markets and does not consider liquidity in international bond or foreign exchange markets.

This paper provides a comprehensive survey of empirical studies on liquidity in international developed and emerging stock markets.

In this article, we consider the evolution of the US stock market from the 1770s through the early 20th century. Adopting an institutional lens, we conceive of the stock market as an institutional field constituted by socially constructed cultural logics and myths. We focus on the role of the US government as an actor embedded in the stock market field and sharing in the prevailing field logics. Tracking the dominant logics of the stock market field at different historical periods, we examine how these logics impacted government regulatory action upon the stock market, and how those government regulations affected the subsequent logics of the stock market field. Our research included both quantitative content analysis of articles in historical newspapers and qualitative historical analysis of multiple primary and secondary accounts of stock market problems and solutions across more than 150 years. We document how government regulatory action both reflects and shapes the logics of the stock market field.

This paper examines how sophisticated and better-informed investors, such as short sellers, trade on information along the supply chain. Given the economic linkages between suppliers and customers, one would expect short sellers to trade on such information and to capitalize on investors' inattention to such economic links.

This paper uses both multivariate regression analysis and portfolio analysis where the time series averages of equally weighted monthly portfolio returns are reported to explore the abnormal returns of long-short trading strategies.

Results indicate that short interest predicts unexpected earnings news, consistent with short sellers extracting information from economic relationships. There is a strong negative relationship between short interest in the supplier firm and the one-month future stock return of the customer firm. This negative relation significantly persists for at least 12 months. One plausible channel explaining the information content of supplier (customer) firm's short interest for the customer (supplier) firms is the short sale constraints on the customer (supplier) firms.

The paper addresses a gap in the literature by examining whether short selling in a firm in the months leading up to a customer's (supplier's) negative shock is negatively correlated to the customer's (supplier's) future performance. Overall, the findings suggest that short sellers play an important role in the price discovery of related firms in the supply chain, which is beyond the direct effects documented in prior literature.

This paper investigates the effect of the short sale ban by the Korean government on the relationship between the disagreement among investors and the future stock returns. Short selling in Korean stock market was banned twice in 2008 and 2011. The short sale ban provides a natural experiment environment to study the effect of the short sale constraints on the relationship between the disagreement among investors and the future stock returns. Furthermore, it is an exogenous shock in the point of individual stocks. Thus, this paper focus on short sale ban periods to analyzes the stock return predictability of the disagreement among investors’ opinions about analysts’ earnings forecasts. Main results of this paper are as follows: First, the portfolio within the top 30% of the disagreement among investors experiences the significantly higher returns than that within the bottom 30% of the disagreement only during short sale ban periods. However, the two portfolio returns are not significantly different during the other periods excluding the short sale ban periods. These results are robust even after controlling for firm sizes, boot to market ratios, and the momentum effects. Second, a portfolio with higher the disagreement among investors presents significantly positive abnormal returns estimated by Fama-French’s three factor model during short sale ban periods. On the other hand, the abnormal returns of the portfolio with lower the disagreement among investors are not significantly different from zero. Furthermore, those returns of the portfolio with lower disagreement are not affected by the short sale ban. Finally, our findings show that individual stock returns are positively related to disagreement after controlling for the characteristics of individual stocks. Consequentially, the stocks with higher disagreement are overvalued during the short sale ban periods according to our robust empirical analyses with various control variables. According to our findings, we conclude that the short sale constraints are important factors to determine the predictability of disagreement on future stock returns. These are consistent with the results of short sale ban on the U.S. stock market from Autore, Billingsley, and Kovacs (2011).