Background: When a privately owned firm or privatized government entity raises capital by selling its stocks for the first time to general public, is known as initial public offering (IPO). The underpricing phenomenon and ownership structure are important characteristics of IPO process that...

This study investigates the relationship between trading volume and returns and volatility of Pakistani market for the period of July 1998 to October 2008. The Dickey-Fuller test is applied to turn the time series stationary. The ARCH and GARCH-M models are used to test the return, volatility...