Performance efficiency analysis of listed companies in Stock Exchange Istanbul with data envelopment analysis: An application on basic metal industry sector

In this thesis, the financial performance of companies listed on Borsa Istanbul in the primary metal industry is evaluated using Data Envelopment Analysis (DEA). The aim of the thesis is to determine the efficiency levels of these companies, analyze the overall financial situation in the sector, and provide recommendations for performance improvements. The study uses financial data from primary metal industry companies listed on Borsa Istanbul between 2019 and 2022. This data is obtained from the companies' balance sheets, income statements, and other financial reports. Data Envelopment Analysis is a linear programming-based method used to measure the relative efficiency of firms, and this study examines the applicability of this method in sectoral analyses. As a result of the analysis, the efficiency levels of the companies in the sector were identified, and the areas where inefficient companies need to make improvements were determined. Furthermore, the key factors underlying the success of efficient companies were examined in detail. The improvement potentials of inefficient companies and their problems with resource utilization efficiency were also revealed. The findings of the study clearly demonstrate the general financial situation in the sector and what needs to be done to improve the performance of the companies. In the recommendations section, strategic planning and management practices are suggested to enhance the performance of inefficient companies. Additionally, the importance of innovation and technology investments to increase the competitiveness of the sector as a whole is emphasized. In conclusion, this thesis comprehensively analyzes the financial activities of the main metal industry companies traded on Borsa Istanbul and offers important suggestions within the framework of the findings to improve the performance of the companies in the sector. This study contributes to the academic literature and provides valuable insights for sector stakeholders. Keywords: Efficiency performance, basic metal ındustry, data envelopment analysis.