In October 1996, The Dhaka Stock Exchange （DSE） adopted trading halts for individual stocks, collectively known as ＂circuit breakers＂, to reduce the stock market volatility. This paper reviews the existing circuit...In October 1996, The Dhaka Stock Exchange （DSE） adopted trading halts for individual stocks, collectively known as ＂circuit breakers＂, to reduce the stock market volatility. This paper reviews the existing circuit breakers literature and developed five hypothesis--＂Magnet Effect＂, ＂Cool off-Heating （C-H） Effect＂, ＂Information Hypothesis＂, ＂Volatility Spillover Hypothesis＂ and ＂Trading Interferences Hypothesis＂--which could be tested empirically not only in the Dhaka Stock Exchange but any stock exchanges around the world. This paper also suggests most appropriate econometric models for empirical testing. GARCH for inter day data and Event Study methodology for intra day data. Moreover, to test the robustness non-parametric tests need to use along with parametric one. Considering the stock market bubbles in 1996, it has been found that it was optimal for the regulators to adopt this trading halt, but not for the market. It failed to protect the market. However, this might be the consequences of misconceptions about the purpose and effectiveness of circuit breakers. Despite many arguments contrary to this mechanism and absence of any conclusive empirical evidence for a fragile stock exchange like DSE, it may be useful sometimes to replace the ＂invisible hand of the marketplace＂ with the ＂visible hand of the market regulators＂.展开更多
We use the Chinese initial public offering data from October 2009 to August 2010 to examine the newly-established growth enterprise board （GEB）. The results indicate that the GEB has been successful and is providing...We use the Chinese initial public offering data from October 2009 to August 2010 to examine the newly-established growth enterprise board （GEB）. The results indicate that the GEB has been successful and is providing a viable channel for new small and medium-sized firms to raise external capital. Four variables, the volatility variable, the turnover ratio, the winning lottery ratio and the price-earnings ratio, are important factors driving the initial- day returns in the regression analysis. The implementation of the new trading-halts policy on the GEB is found to be effective in mitigating excessive speculation. Our analysis results could be used by policy-makers to gauge the effects of policy changes on the underpricing of the initial public offerings of the GEB.展开更多
文摘In October 1996, The Dhaka Stock Exchange （DSE） adopted trading halts for individual stocks, collectively known as ＂circuit breakers＂, to reduce the stock market volatility. This paper reviews the existing circuit breakers literature and developed five hypothesis--＂Magnet Effect＂, ＂Cool off-Heating （C-H） Effect＂, ＂Information Hypothesis＂, ＂Volatility Spillover Hypothesis＂ and ＂Trading Interferences Hypothesis＂--which could be tested empirically not only in the Dhaka Stock Exchange but any stock exchanges around the world. This paper also suggests most appropriate econometric models for empirical testing. GARCH for inter day data and Event Study methodology for intra day data. Moreover, to test the robustness non-parametric tests need to use along with parametric one. Considering the stock market bubbles in 1996, it has been found that it was optimal for the regulators to adopt this trading halt, but not for the market. It failed to protect the market. However, this might be the consequences of misconceptions about the purpose and effectiveness of circuit breakers. Despite many arguments contrary to this mechanism and absence of any conclusive empirical evidence for a fragile stock exchange like DSE, it may be useful sometimes to replace the ＂invisible hand of the marketplace＂ with the ＂visible hand of the market regulators＂.
基金the Social Science and Humanity Research Fund of the Chinese Ministry of Education(10YJC790070)the National Natural Science Foundation of China(71031003)
文摘We use the Chinese initial public offering data from October 2009 to August 2010 to examine the newly-established growth enterprise board （GEB）. The results indicate that the GEB has been successful and is providing a viable channel for new small and medium-sized firms to raise external capital. Four variables, the volatility variable, the turnover ratio, the winning lottery ratio and the price-earnings ratio, are important factors driving the initial- day returns in the regression analysis. The implementation of the new trading-halts policy on the GEB is found to be effective in mitigating excessive speculation. Our analysis results could be used by policy-makers to gauge the effects of policy changes on the underpricing of the initial public offerings of the GEB.
