Sinking Nvidia keeps Wall Street's gains in check

Most of Wall Street is rising on Tuesday, but another return toward Earth for Nvidia is keeping the U.S. stock market in check.

The S&P 500 edged just 0.2% higher, 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 483 points, or 1%, as of 2:01 p.m. Eastern time, and the Nasdaq composite was 0.2% 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 sti