Relationship With Corporate Governance Rating and Share Value: Evidence from Borsa Istanbul

This study aims to analyse the effect of corporate governance ratings on the stock values of publicly traded companies in the Corporate Governance Index (XKURY of Borsa Istanbul (BIST) operating in Turkey. In this context, the rating scores of the companies included in the Corporate Governance Index for the 2016-2020 periods were determined. In the study in which the Paired Dependent Sample t-Test was used as the research method, the differences in the shared values between the dates thirty days before and thirty days after the announcement of the ratings were examined. According to the results obtained, it was observed that there was a statistically significant effect on the stock values of companies that implemented corporate governance principles in 2016, 2017, and 2019, but no statistically significant effect was observed for these years due to the systematic risks that occurred at the macro level in 2018 and 2020.