The Canada-European Union Comprehensive Eco­nomic and Trade Agreement (CETA) has been called a game-changer. In the investment chapter, CETA has introduced a number of key innovations, including the investment court system with an appellate tribunal guidelines on third party funding transparency and information sharing modern versions of standards of protection detailed provisions on reservations and exceptions Considering that the new dispute resolution provisions in this chapter have also passed the scrutiny of the Court of Justice of the European Union, it is expected that CETA’s investment chapter will serve as a blueprint for future EU investment agreements. This article-by-article commentary will be a key resource for practitioners and academics in the field of EU investment protection law. <b>With contributions by</b> Afolabi Adekemi, Andrés E. Alvarado Garzón, Freya Baetens, Crina Baltag, Jens Benninghofen, Christina Binder, Gabriel Bottini, Colin Brown, Marc Bungenberg, Markus Burgstaller, N. Jansen Calamita, Armand de Mestral, Arnaud de Nanteuil, Lori Di Pierdomenico, Patrick Dumberry, Katia Fach Gómez, Richard Happ, Angshuman Hazarika, Stephan Hobe, Frank Hoffmeister, Anna Holzer, Mattijs Kempynck, Panos Koutrakos, Ursula Kriebaum, Céline Lévesque, Irmgard Marboe, Lars Markert, Patricia Nacimiento, Erman Özgür, August Reinisch, Stefanie Schacherer, Julian Scheu, Christoph Schreuer, Lukas Stifter, Johannes Tropper, Güneş Ünüvar, Lukas Vanhonnaeker and Herman Verbist.