International arbitration is a recognized way to resolve economic confl icts. Th is article asks if state-state investment arbitration ( SSIA ) is an option for Latin America. It examines the language of investment treaty provisions, cases and arbitral awards involving states, and treatymaking practice in the region. Th e analysis shows some complementarity between the mechanisms of investor-state arbitration ( ISA ) and SSIA ; sometimes, the latter is the only option. Th is article concludes that SSIA is neither a backlash nor a more eff ective mechanism compared to ISA . SSIA constitutes an opportunity for both home and host Latin American states to balance their investment treaty commitments. I thank Ira Ryk-Lakhman, Katia Fach Gómez, Luis Felipe Viveros, Manuel Gómez, Peter Tzeng, and three anonymous reviewers for their valuable comments and suggestions. Any remaining errors are, of course, my own.