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    Impacts of credit rating changes on borsa Istanbul (BIST) equity market
    (Ege Univ., 2017) Pirgaip, Burak; 252136
    This study aims at analyzing the impacts of Turkey's sovereign credit rating upgrades and downgrades made by Moody's Investors Service (Moody's), Standard and Poor's (S&P) and Fitch Ratings (Fitch) in 1993-2016 period on Borsa Istanbul (BIST) Equity Market. Event study analysis results show that abnormal returns concur with the relevant rating decision both before and at the event date. However, the effects are reversed afterwards. Moreover, it is apparent that negative sided rating changes have more significance over abnormal returns when compared with positive sided ones.
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    Why Do Firms Repurchase Their Stocks? Evidence From An Emerging Market
    (2017) Pirgaip, Burak; Karacaer, Semra; 252136
    Though it has recently become a contemporary financial management tool, stock repurchase can be so dangerous that it may raise concerns about insider trading and manipulative transactions. In fact, such concerns underlie the most important critique of stock repurchase and justify its prohibition, at least its restriction, in several jurisdictions to date. Turkey, as one of these jurisdictions, has latterly been updated in order to allow open market stock repurchases with certain restrictive provisions. We intend to explore why Turkish firms decide to repurchase their stocks. Having employed a conditional logistic regression model, the results reveal that signaling hypothesis, i.e. undervaluation and positive information dissemination, and excess capital and free cash flow hypothesis, i.e. excess cash distribution, hold for Turkish companies.