U.S. stock index futures eased on Thursday, a day after markets were supported by Nvidia's fleeting $4 trillion milestone, while investors shifted their focus to upcoming economic data and pivotal trade talks.

The Dow Jones average finished higher Wednesday after the Fed's June minutes flicked to potential rate cuts. Nvidia set a new high, and hit the $4 trillion mark in valuation.

Nvidia (NASDAQ: NVDA) shares climbed 1.1% to close at $160 today, bucking the cautious sentiment that weighed on major indices. The technology-heavy Nasdaq Composite gained just 0.03% and growth-focused S&P 500 retreated 0.07% amid concerns about tariffs, lingering inflation worries, and mixed economic signals.

Dow, S&P 500, and Nasdaq futures are falling in premarket trading. An Nvidia-led rally fades as the stock market react to President Donald Trump threating a 50% tariff on goods from Brazil.

Shares of Nvidia and Palantir Technologies have surged in phenomenal fashion in the past two years or so amid the rapidly growing adoption of artificial intelligence (AI) technology across the globe.

To me, Nvidia may have put AMD in a checkmate position for the time being. I think these figures reported could imply that Nvidia will remain the leader in AI data center chips and could be on its way to a new, prolonged, and sustained wave of growth.

Nvidia stock briefly topped a $4 trillion market cap with Nvidia chipmaker Taiwan Semi on tap. AI plays Astera Labs and Rubrik flashed buy signals.

Continuing questions about the impact of Trump administration tariffs caused U.S. equities to be higher but little changed at midday.