NEW YORK (AP) — Most of Wall Street is rising on Tuesday, but another return toward Earth for Nvidia is keeping the U.S. stock market down.

The S&P 500 slipped 0.3% in midday trading, despite gains for the majority of stocks within the index. It's a slowdown for the market, coming off Monday’s vigorous rebound following its first losing week in four.

The Dow Jones Industrial Average was up 188 points, or 0.4%, as of 11:30 a.m. Eastern time, and the Nasdaq composite was 0.8% lower. All three are still near their all-time highs but have 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 one of the top reasons the U.S. stock market has hit records despite a slowing job market and still-hi

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