Table of contents : Introduction The Historical Development of the FET Standard in International Investment Treaties Different Constructions of the FET Standard in Investment Treaties Developing Countries in International Investment Arbitration Current Arbitral Practice Relating to Political and Socio-political Circumstances in Host Developing Countries and Countries in Transition: FET Standard in Context Current Arbitral Practice Relating to Economic Crises in Host Developing Countries: The FET Standard in Context Key Problems in the Interpretation of the FET Standard by Current Investment Tribunals Conclusion