Shares in artificial intelligence data-center companies fell Thursday—the president’s $500 billion spending drive might raise more questions than answers.

Oracle's shares jumped nearly 9% before the bell on Wednesday after U.S. President Donald Trump said the company would make a large investment in artificial intelligence infrastructure, alongside OpenAI and SoftBank.

SoftBank Group Corp., OpenAI, and Oracle Corp. are forming a $100 billion joint venture to fund artificial intelligence infrastructure, an effort unveiled with President Donald Trump aimed at speeding development of the emerging technology.

Musk slammed a Trump-backed $500 billion AI joint venture building out OpenAI’s artificial general intelligence.

The joint venture, called Stargate, plans to invest $500 billion to help the United States stay ahead of China and other rivals in the global AI race, Trump said at the White House on Tuesday.

Stargate is supposed to spend $500 billion on AI infrastructure, President Trump said. But Elon Musk suggested that the venture had much less cash.

Shortly after President Donald Trump announced a new massive AI infrastructure investment from the White House, “First Buddy” Elon Musk tried to tear it down.

President Donald Trump announced a joint venture Tuesday with OpenAI, Oracle and SoftBank to invest billions of dollars in AI infrastructure in the United States.

Sam Altman, the CEO of OpenAI, has announced a shift in his previously critical perspective on President Donald Trump. Newsweek has contacted OpenAI and the White House for comment via email. Altman's announcement came one day after Trump named OpenAI,