The tech-heavy Nasdaq Composite Index finished up 1.1 percent, while the broad-based S&P 500 gained 0.6 percent and the Dow Jones Industrial Average climbed 0.7 percent.
Appetite for AI stocks is increasing again after Elon Musk's AI and space company SpaceX presented an unexpectedly strong report after the market closed on Tuesday. The company's AI segment increased sales ninefold compared with last year, and the stock ended Wednesday's trading up 7.8 percent.
Tesla, the electric car giant, is due to report after the market closes. Its stock ended the trading day up 3.4 percent.
Facebook owner Meta is also due to report. Its stock closed up 0.5 percent.
At the same time, concerns about an escalation of the conflict in the Middle East have further fueled oil prices, with a barrel of North Sea oil now costing $109.5.
