The facility Interest Rate is one of the most important macroeconomic variables. The bank facility Interest Rate is associated with other macro-economic variables, one of which is the bank deposit Interest Rate. Using the time series data of the 1973-2017 period and the simultaneous equation system, the researchers esti-mated four equations using the three-stage least squares method. The result of estimation of the equation's indicate that there are (i) a significant positive rela-tionship between the bank deposit Interest Rate and the facility Interest Rate in the Iranian economy during this 45-year period, (ii) a significant positive relationship between the facility Interest Rate and the deposit Interest Rate, (iii) a significant positive relationship between the liquidity level and the inflation Rate, and there is a positive and relatively significant relationship between the exchange Rate and the inflation Rate, (iv) a significant positive relationship between the facility Interest Rate and the credit risk.

Banking industry has faced big changes since 1990 and the speed of these changes has been increased rapidly along with the development of communication facilities, globalization, deregulation, technological improvements and information technology advances, in particular.Profit making has been the main incentive for many institutions and the market experienced significant competition over the development of the active firms in this industry. The increased competition of the market has also another characteristic. As the firms are not the same in size and both big and small firms are doing business probably what makes these firms of all size survive in this industry is a good and reasonable profit.In order to investigate the performance of the banks, we will introduce some indexes and ratios to compare the selected banks with respect to their performance.There are other factors which can affect the compatibility using ratios (such as specialized business of the banks), but in sum, are used for comparison worldwide. Some standards have been introduced. In this article, a comparative approach of the relevant ratios among the banks of the selected countries will be carried out and then, some methods for better performance of the Interest-free banking will be introduced.

The herding behavior in financial markets is perceived as one of the behavioral biases among investors, and investigating the influential factors on it can significantly impact investors' decision-making and efficiency in financial markets. Given the importance of this topic, in this study, herding behavior in the Tehran Stock Exchange is examined using the Cross-Sectional Absolute Dispersion (CSAD) method during the time period from 2005 to 2021. Furthermore, the impact of changes in exchange Rates and Interest Rates on herding behavior in both bullish and bearish market conditions is tested. The research results indicate that in the overall period, an increase in the exchange Rate and Interest Rate lead to herd behavior in the market, while with a decrease in the exchange Rate and Interest Rate, no herd behavior is observed. Similarly, the obtained results in bearish markets are similar to the estimates in the overall period, while this phenomenon is not observed in bullish markets. Therefore, it can be concluded that the effects of increasing exchange Rates and Interest Rates on herding behavior are mainly evident in bearish markets.

The oil price is one of the key variables of any economy that plays a significant role in determining the economic situation of each country. The main objective of this study is to investigate the relationship between unemployment and Interest Rates and oil price in Iran during 1981-2013. According to this, Johansson co-integration and Toda-Yamamoto Granger causality test have been used. Coefficients obtained by Johansson method based on collective vector shows that the unemployment Rate is a reverse function of oil prices, which will lead to 2.28 percent reduction in the unemployment Rate. Variable of oil price, during this period, had a negative impact on unemployment, which is considered as a good result due to the high dependence of the country economy on oil. Also, if the Interest Rate increases one percent in the long run, the unemployment Rate will increase 0.94 percent. Also in case of one percent increase in private sector investment, the unemployment Rate will decrease 0.80 percent. causality test results show that oil prices and Interest Rate are the causes of unemployment in Iranian economy.

Monetary policy is considered as one of the main economic tools, accompanying fiscal policies in forming a set of powerful items for applying economic policies. The main role of monetary policyis controlling money volume and liquidity. This paper reviews the impact of monetary policy on Interest Rate in Iran during 1352-1385 via OLS. To this aim, the relation between money volume and Interest Rate is investigated through ordinary least square method. The results indicate that money volume has on direct effect on Interest Rate. In addition, there is a direct relation between consumer price index and Interest Rate. Finally, a direct relation between national income and Interest Rate is concluded.