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This paper examines whether the revision of underwriting rule in June 2007 has affected the adjustment of offer price during the book-building period and the subsequent underpricing in the KOSDAQ IPO ...
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This paper examines whether the revision of underwriting rule in June 2007 has affected the adjustment of offer price during the book-building period and the subsequent underpricing in the KOSDAQ IPO market, which plays a major supplier role of direct financing to the electronic commerce business firms in Korea. Especially, the paper explores the role of the book-building system for the market mechanism by testing the existence of the partial adjustment phenomenon based on the Benveniste and Spindt(1989)¡¯s dynamic acquisition model, and assesses the impact of the 2007 revision in the efficiency of the KOSDAQ IPO market.
Empirical results of difference analysis using the samples before and after the revision, show that the adjustment of the offer price in the pre-issue market tends to be downward and the cumulative abnormal return(CAR) is significantly reduced after the revision. In the regression analysis, however, the partial adjustment phenomenon is not identified after the revision.
These findings imply that the revision of underwriting rule in 2007 has mitigated the underpricing in KOSDAQ IPO market indebted to the abolition of the putback option, while it has melted away the efficiency of partial adjustment phenomenon in the Korean book-building system.
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ABSTRACT