New York – U.S. stocks are drifting in mixed trading on Tuesday, a slowdown after swinging from their first losing week in four to Monday’s roar back.

The S&P 500 slipped 0.2% in early trading. The Dow Jones Industrial Average was up 78 points, or 0.2%, as of 9:35 a.m. Eastern time, and the Nasdaq composite was 0.4% lower. All three are still near their all-time highs, but they’ve been shaky recently.

Much of the focus was on Nvidia and other winners of the artificial-intelligence frenzy, as usual. Their sensational growth has been a major reason the U.S. stock market has set records despite a slowing job market and still-high inflation. But their prices have shot so high that critics say they look too expensive and are reminiscent of the 2000 dot-com bubble that ultimately burst nearly

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