Researchers have developed investigations into both initial and seasoned equity offering (SEO) by obtaining data from developed markets (e.g. Denis, 1994; Kothari and Warner, 1997; Corwin, 2003; Eckbo et al., 2006), while the literature in emerging markets is relatively neglected. This thesis provides an overview examination of one specific emerging region, namely Thailand. Equity financing in Thailand has become more widespread in the aftermath of the last economic crisis in 1997. With a more recent data set and larger sample size than previous Thai studies, we examine the performance of SEO firms between 1999 and 2006. Our thesis findings contribute to the existing literature by: (1) examining the SEO samples which focus mainly on issuing new shares to existing shareholders, i.e. rights issuing and private placement, instead of the general aspect of public offering, (2) applying a different benchmark to measure post-issuing performance compared with existing studies and (3) examining the relationship between short-term and long-term abnormal returns. Our evidence reveals that the stock prices react negatively to SEO announcements. We also find that there is no relationship between short- and long-term abnormal returns. This is a consistent explanation of the characteristics of the Thai capital market in practice. In addition, our results from the determinants of SEO underpricing are mostly consistent with the previous literature (i.e. Corwin, 2003; Intintoli and Kahle, 2009). Lastly, our findings suggest that SEO firms underperform during the post-issuing period, particularly one year after issuing new shares.
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