Contributor(s): Pablo Fernandez, Carlos Lopez, Miguel Klingenberg | The recent expropriation of Repsol by the Argentine government raises important legal, diplomatic and policy issues that put into question the current system of international investment protection. This seminar invites to debate on this issues from the investor's perspective. Pablo Fernández is Professor of Finance at the IESE Business School, Madrid. Carlos López Jall is the Director of International Organizations and European Affairs of Repsol S.A. Miguel Klingenberg is the Deputy Secretary General of Repsol S.A. Jan Kleinheisterkamp is Senior Lecturer of Law at LSE.