This paper examines mean reversion processes in volatility structure of stock markets after extremely high or low stock returns. The stock market volatility is reflected in three aspects, overall volatility, volatility momentum, and volatility concentration, and they are measured by three basic...

This study focuses on determining whether short-term market inefficiencies exist that can be periodically exploited by investors. Berkshire Hathaway’s dual class stock with differential voting rights and one- way conversion option provides a unique opportunity to investigate this issue...