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 .

Shares of Nvidia, Microsoft, Oracle, and other AI-related companies surged Wednesday after the Trump administration’s announcement of a $500 billion joint venture spurred optimism about a rising tide of AI investments.

Stargate 1 project is a massive $500 billion AI infrastructure initiative in collaboration with tech giants like OpenAI, Oracle and Microsoft. The groundbreaking project aims to create the largest AI supercomputer, dubbed "Stargate," which is set to be launched by 2028.

Trump announced a $500 billion joint venture between OpenAI, Softbank, MGX and Oracle to build new datacenters to power the next wave of AI.

Stargate, a joint venture between Open AI, Oracle, and SoftBank, will invest $500 billion in building AI infrastructure across the U.S.