NEW YORK (AP) — More gains for Nvidia, Amazon and other AI superstars are propping up Wall Street on Monday, even as most U.S. stocks fall.

The S&P 500 was virtually unchanged in midday trading and was holding near its all-time high set last week. The Dow Jones Industrial Average was down 203 points, or 0.4%, as of 11:30 a.m. Eastern time, and the Nasdaq composite was 0.3% higher.

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