NEW YORK — More gains for Nvidia, Amazon and other AI superstars propped up Wall Street on Monday.

The S&P 500 rose 0.2 percent and pulled closer to its all-time high set last week, even though the majority of stocks in the index sank. The Dow Jones Industrial Average dropped 226 points, or 0.5 percent, and the Nasdaq composite climbed 0.5 percent.

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Nvidia was the strongest force lifting the S&P 500, just like it has been for the year so far. The chip company rose 2.2 percent to bring its gain for the year to date to 54.1 percent.

Amazon was the No. 2 force pushing the market higher. It rallied 4 percent after announcing a $38 billion agreement with OpenAI, which will use Amazon’s cloud computing services to run its AI workloads.

IREN, an AI cloud service provide

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