IPOs are underpriced to the extent of 15-16% in the US markets according to result from several studies. There are many theories explaining the reasons for IPO underpricing - the most commonly accepted ones are 1) 'information asymmetry between issuers, investment bankers & investors' ; 2) profit opportunity for investment bankers 3) issuer reputation. The following paper links may throw more light on the reasons of IPO underpricing. Although IPO underpricing is a worldwide phenomenon, studies based on IPO underpricing are generally market specific & generalisations across countries is not easy.