US stock futures were steady after another milestone moment from Nvidia (NVDA) helped push the S&P 500 and Nasdaq to new highs. Renewed investor enthusiasm has been felt in the market's standouts, most prominently AI giant Nvidia,

US stock market today opened slightly lower as Dow, S&P 500, and Nasdaq futures paused after a powerful tech rally led by Nvidia, which just hit a historic $4 trillion market value. Meanwhile, President Trumps new tariff threats—including a proposed 50% import tax on Brazil and extra tariffs on BRICS nations—are now in focus.

The stunning rise of Nvidia Corp to become the first publicly traded company valued at $4 trillion underscores the massive importance to the stock market of the AI chipmaker and the technology sector.