Determining Factors Affecting Optimal Risk Level, Optimal Capital Structure and Efficiency in Iranian Banks (Delphi-Fuzzy Approach)

Banking capital and risk decisions are affected by laws, private incentives and capital market pressure. Focusing on examining these cases will explicitly provide an updated insight into empirical evidence on the impact of auditors 'regulations on capital and risk, and provide an assessment of the evolution of banks' decision making mechanisms. Therefore, this research has determined the factors affecting the optimal level of risk and optimal capital structure in Iranian banks using Delphi-Fuzzy approach based on in-depth interview with experts and content analysis. After identifying the effective factors using content analysis and content analysis, 15 experts were interviewed. The Delphi-Fuzzy approach was used to determine the effect of the final factors. The results show that the most important factors affecting efficiency are physical capital cost, manpower cost, cost of funds, investment in securities and net facility. In addition, among the various factors, the variables of facility coverage rate, risk capacity and legal requirement will be the most important factors affecting the optimal level of risk in banks. Finally, minimum capital, minimum capital risk and minimum leverage ratio were considered as the most effective factors in determining optimal capital structure.