Mutual funds play a crucial role in financial markets by providing investors with diversified investment opportunities and professional management. This book offers an in-depth analysis of the mutual fund industry in Iran, examining its structure, regulatory framework, and performance assessment methods.  The book explores key aspects of mutual fund management, including fund selection, portfolio diversification, risk management, and investment strategies. It also evaluates various performance measurement models, such as risk-adjusted return metrics, benchmarking techniques, and the impact of economic and market conditions on fund performance. A comparative analysis with international practices is provided to highlight Iran’s unique challenges and opportunities in the mutual fund sector. Moreover, the book addresses the role of fund managers, investor behavior, and regulatory policies in shaping the mutual fund landscape. By integrating theoretical foundations with empirical data, this study offers valuable insights for academics, financial professionals, policymakers, and investors interested in the Iranian mutual fund market. This book serves as a comprehensive guide for understanding mutual fund operations and performance evaluation in Iran, contributing to the broader discourse on investment management in emerging economies.