The case adds another layer of uncertainty as the US tariff framework continues to evolve.

US stock futures edged higher after Monday's rally, when the Nasdaq gained 2.13% and the S&P 500 and Dow rose 1.48% and 1.32%. Amazon climbed 4.6% to top a $3 trillion valuation, joined by gains in Microsoft, Nvidia, Meta, Alphabet, and Tesla, while lower oil prices supported sentiment ahead of earnings from SpaceX, AMD, Caterpillar, Merck, and McDonald's.

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