This book investigates the relationship between corporate diversification and performance in Nigerian banking industry. It is a product of guided, intensive, systematic and comprehensive studying of selected commercial banks in Nigeria. The book provides in-depth, authoritative and up-to-date coverage of the subject matter of diversification on corporate performance. Written in a highly readable fashion, the book consists of five chapters that explain the entire range of activities necessary for researchers in executing a study on corporate diversification and performance relationship using Nigerian banks as the case study at the Master degree level. The book offers the readers a lucid exposition and explicit presentation of various concepts, principles and techniques involves in diversification and is rich in its provision of useful skills for practical execution of diversification in business ventures. The book provides invaluable instructional and reference materials for lecturers, practitioners and students both in the tertiary institutions and the industries. Anyone who uses this book will find it an inestimable companion.