Alireza Abbasian - PhD student in financial management, Qom branch, Islamic Azad University, Qom, Iran
Sayyed Kazem Chavoshi - Assistant Professor, Department of Bank and Insurance Management, Kharazmi University, Tehran, Iran
Mirfeiz Fallahshams - Associate Professor of Accounting Department, Central Tehran Branch, Islamic Azad University, Tehran, Iran
Reza Gholami Jamkarani - Assistant Professor of Accounting Department, Qom Branch, Islamic Azad University, Qom, Iran

Objective: This research aims to investigate the fluctuations of parallel markets on the level of penalty rates and to propose a conceptual model predicting depositors' behavior regarding deposit failure rates. Theoretically, this study contributes to the development and presentation of factors affecting customers' financial behavior in the banking system (both private and public). From an innovation perspective, the proposed model examines the actual decisions and behaviors of individuals in financial matters.Method: The research methodology is applied and post-event in nature. This study adopts a quantitative approach. The data used in this research were collected by referring to time series statistics from the central bank, official bank websites, and the country's capital market and were utilized accordingly. The software used for data analysis in this research is Eviews.Findings: After the necessary data examination and analysis using the software, the results of this research indicate that in the first phase, the optimal portfolio was determined between currency rates, gold coins, real estate, securities, and bank deposits without imposing any penalty on long-term deposits. In this situation, individuals with different risk levels allocate ۹۵%, ۵۷%, and ۳۷% of their portfolio to bank deposits, corresponding to risk-averse, moderate risk, and risk-seeking individuals, respectively. In the second phase, by imposing a penalty equal to ۱۰% of the deposit profit, the optimal basket was determined; even in this case, these three groups of individuals with different risks allocate ۸۸%, ۵۳%, and ۳۶% of their capital to bank deposits, respectively.Conclusion: It is observed that this decreasing trend in bank deposits continues until the penalty rate equals ۲۵% of the bank deposit rate, beyond which no individual with any level of risk is willing to deposit in the bank.Objective: This research aims to investigate the fluctuations of parallel markets on the level of penalty rates and to propose a conceptual model predicting depositors' behavior regarding deposit failure rates. Theoretically, this study contributes to the development and presentation of factors affecting customers' financial behavior in the banking system (both private and public). From an innovation perspective, the proposed model examines the actual decisions and behaviors of individuals in financial matters. Method: The research methodology is applied and post-event in nature. This study adopts a quantitative approach. The data used in this research were collected by referring to time series statistics from the central bank, official bank websites, and the country's capital market and were utilized accordingly. The software used for data analysis in this research is Eviews. Findings: After the necessary data examination and analysis using the software, the results of this research indicate that in the first phase, the optimal portfolio was determined between currency rates, gold coins, real estate, securities, and bank deposits without imposing any penalty on long-term deposits. In this situation, individuals with different risk levels allocate ۹۵%, ۵۷%, and ۳۷% of their portfolio to bank deposits, corresponding to risk-averse, moderate risk, and risk-seeking individuals, respectively. In the second phase, by imposing a penalty equal to ۱۰% of the deposit profit, the optimal basket was determined; even in this case, these three groups of individuals with different risks allocate ۸۸%, ۵۳%, and ۳۶% of their capital to bank deposits, respectively. Conclusion: It is observed that this decreasing trend in bank deposits continues until the penalty rate equals ۲۵% of the bank deposit rate, beyond which no individual with any level of risk is willing to deposit in the bank.