Borsa Istanbul'da işlem gören firmalarin yeni iş ilişkisi duyurularinin hisse senetleri getirileri üzerindeki kisa vadeli etkisinin olay etüdü ile incelenmesi
An assessment of short-term effects of new business association announcements of companies

Summary/Abstract: According to the efficient market hypothesis, a "semi-strong form efficiency" of a stock market is when private and significant announcements of public traded corporations, such as new business associations, bring abnormal returns without any effect on the share price of its stocks. The purpose of this study is to examine through event studies whether the announcements on new business association shave any short-term effect on stock returns. In our application, the short-term effects of announcements included in the public disclosure platform and contain information about new business associations on stock prices were measured by event studies. As a result of the application, the new business association announcements were proven to have an effect on stock prices and determined that the Turkish capital market is not effective even in a semi-effective form.

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