Wall Street looked to keep momentum from a tech-fueled rally that saw Nvidia leap to become the world's first $4 trillion public company.

Contracts for the S&P 500 index edged down 0.2% and a gauge of the dollar dipped by 0.1% Thursday. Treasuries rose slightly while Asian shares were flat. Bitcoin held near a record high it hit on Wednesday. Earlier, Brazilian assets plunged after Trump announced new tariff letters that included imposing 50% levy on goods from the country.