Published 20 January 2017
In a watershed decision in 2011, an ICSID tribunal accepted jurisdiction over a mass claim brought by 180,000 Italian bondholders against the Republic of Argentina, alleging international law claims arising out of Argentina's sovereign debt default. In 2016, the Abaclat arbitration settled before a decision on the merits could be reached. This Article examines developments in mass claims and sovereign debt claims following the Abaclat jurisdictional decision. It examines procedural aspects of the Abaclat arbitration in order to assess what lessons can be learned about addressing mass claims through investment treaty arbitration. It also looks at recent developments in the sovereign debt arena in an effort to draw conclusions about the potential future of sovereign debt claims as a subject of investment treaty arbitration.