Kluwer: When Tariffs Become Treaty Claims: Can U.S. Trade Measures Trigger Investor-State Arbitration?

In September 2025, Roberto Castro de Figueiredo argued on this Blog that President Trump’s reciprocal tariffs could distort competition among multinationals investing in the U.S. and thereby trigger most-favoured-nation (“MFN”) concerns under U.S. investment treaties. That intervention was timely and important.