US stock futures edged lower on Wednesday as investors cautiously counted down to Nvidia's (NVDA) earnings report, seen as a crucial test of hopes for Big Tech amid tariff uncertainty. Nvidia's results are looming large as Wall Street looks to the AI chipmaker to confirm that megacap techs can still drive gains even as trade-war fears prey on markets.

The “Magnificent Seven” comeback follows a harsh fall after President Donald Trump’s “liberation day” tariffs shocked investors, businesses and U.S. trade partners

Nvidia is slated to report fiscal first-quarter results after the market closes Wednesday, with Wall Street expecting another record quarter from the world's second-most valuable company.