Impact on stock market of affecting domestic and foreign political risk factors to turkey: an application on firms in the BIST 30 index

According to the efficient market hypothesis, abnormal returns occur due to the news that companies announce to the public and that the prices of the stocks of the relevant companies are directly or indirectly affected. The duty of the portfolio manager is to take the right steps to ensure that their portfolios are least affected by these extraordinary circumstances. The aim of this study is to determine whether the news announced to the public in the investment decisions of stock investors has any effect on the stock returns of the related companies by trying to measure it with the event study method. Our aim in the study is to reveal the effects of domestic and foreign political risk factors that affect a country in many ways on the Turkish stock market. Thus, information will be given about the details and content of political risk factors, and what kind of financial effects they have on the capital market will be determined. KEY WORDS: Borsa İstanbul, Index, Event Study, Risk.