This book presents comprehensive information on a range of issues in connection with the Fair and Equitable Treatment (FET) standard, with a particular focus on arbitral awards against host developing countries, thereby contributing to the available literature in this area of international investment law. It examines in detail the interpretation of the FET standard of key arbitral awards affecting host developing countries, demonstrating the full range of interpretation approaches adopted by the current investment tribunals. At the same time, the book offers valuable practical guidance for counsels/scholars representing host developing countries in investment arbitration, where balancing the competing interests of the foreign investors and the host developing countries in investment disputes poses a complex challenge.