Factors affecting the value of equities of companies traded in BIST

One of the most important factors in determining the decisions of the people and institutions trading on the stock market is the stock market index in which the stock is located. The purpose of this thesis is to investigate whether there is a relationship between inflation, interest, gold and dollar macroeconomic variables and the BIST ALL-100, BIST 100 and BIST INDUSTRIES indices and ,if any, the magnitude of the relationship. In practice, the data set consisting of monthly data from January 2009 to December 2016 is used. In the model, analysis was started using 96 observations for each variable. BIST ALL-100, BIST 100 and BIST INDUSTRIES Indexes are defined as dependent variables for each analysis and Gold, Interest, Inflation and Dollar prices are defined as independent variables and analyzed with "Multiple Linear Regression Method". Because of the multiple linear correlation problem between the variables, as a result of the analysis made by the Multiple Linear Regression Method, the analysis was continued with "Ridge Regression Method". As a result of the study, there are relations between the variables of inflation, gold and dollar and BİST ALL-100 variable; between the variables of inflation and dollar and BİST 100 variable; between the variables of inflation and gold and BİST INDUSTRIES variable. Keywords: Indices, Macroeconomic Variables, Regression Analysis