Nvidia stock is up big on the company's OpenAI partnership — and it's pulling the whole market higher

The move: Nvidia stock jumped as much as 5% on Monday. The move adds to the gains for the AI stalwart in 2025, with the stock up 36% year-to-date. The jump on Monday helped spark a broader rise in major indexes. After starting the session in the red, the tech-heavy Nasdaq Composite was up almost 1% after news of the deal, while the S&P 500 jumped 0.5% to hit a fresh record high. The chart: Why: Nvidia announced a new partnership with OpenAI, which will build new gigascale AI facilities using the chip mak ...