This book shows the use of fuzzy logic for the needs of finance. Nowadays many phenomena in finance and economics are fuzzy, but are treated as if they were crisp. In this book, such financial research problems are analyzed. In this book, the authors include five chapters. Each chapter contains an analyzed research problem and applying fuzzy logic as a tool to solve the problem. Fuzzy logic applications can be a good tool to enhance the finance issue and to evaluate the performance.