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The study aims to determine the effects of audit reports, which are one of the foundations of assurance between firms and firm interest groups, on the market value of firms and present empirical evidence in Turkey. In this context, unqualified, adverse, and disclaimer of opinion audit reports of 77 non-financial companies in BIST 100 for the period 2010/Q1-2021/Q3 were analyzed with the Driscoll-Kraay Estimation method within the framework of panel data methodology. As a result of the analysis, it has been concluded that the unqualified opinion affected positively the market value of the firm, and the disclaimer of opinion had a negative effect. On the other hand, no significant relationship was found between Adverse opinion and firm value. It is expected that the results, which are obtained from the study, will contribute to the limited literature on audit opinion and firm value relationship, as well as create a perspective for investors in the investment process. [ABSTRACT FROM AUTHOR]

In this study, it is aimed to determine the relationships and interactions between the Dollar Index and the Major World Indices (BIST 100, DAX, Dow Jones, S&P 500, Nikkei 225, FTSE 100, Euro Stoxx 50) and whether the Dollar Index can be an international financial indicator. Relationships between seven major world indices and dollar indices examined in the study were examined by granger causality test; While there is no causality relationship between the BIST 100, Dow Jones, and S&P 500 indices towards the Dollar Index, a one-way causality relation has been determined from the Dollar Index to these indices. A bidirectional and reciprocal causality relationship was determined between the DAX, Euro Stoxx 50, FTSE 100 and Nikkei 225 indices with the Dollar Index. It is considered that the findings obtained are mostly compatible with the literature. The Dollar Index, which was created in 1973 and has been used for about 50 years and covers a proportional composition of other important currencies, mainly the US Dollar, is considered to be an important financial and economic indicator today due to the close causality relations and strong correlations between them and the Major World Indices. [ABSTRACT FROM AUTHOR]

The aim of this study is to assess the impact of oil price changes on stock prices. We believe that the possible relationship between oil prices and capital markets might be used as a guide in terms of valuing capital market instruments. Hence, the study analyzes the impact of change in crude oil prices and stock market returns on petrochemical industry index returns using a two-factor model. Accordingly, industry (ISE Oil, Chemical and Plastic Index) risk premium, crude oil price changes and stock market index (ISE 100) data were used in the regression analysis for the years between 2003 and 2012. The study attempts to explain industry risk premium via aforementioned explanatory variables both in a six-month sub-period daily setting and in a consecutive monthly setting. The regression results yield significant results when monthly analysis performed while results yield significant results for three distinct sub-periods when six-months sub-periods analysis performed. [ABSTRACT FROM AUTHOR]