This is the leading work on Swiss arbitration law by a recognised team of experts. The fully revised and supplemented Fourth Edition provides up-to-date information on the law and practice of international and domestic arbitration in Switzerland, including on the recent revision of Chapter 12 PILA in 2020. It provides a comprehensive analysis of all relevant aspects of arbitration, including the concept of arbitration, the sources of arbitration, arbitrability, and all aspects concerning the validity and scope of the arbitration agreement and its autonomy. Other topics include competence-competence, the jurisdiction of the arbitral tribunal, the arbitral procedure, the effects and limits of arbitral awards, setting aside as well as the recognition and enforcement of awards in Switzerland. All practitioners in the field will find this new edition invaluable.