<p>Stocks are falling again on Wall Street as AI mania loses more steam and as more companies pull their forecasts because of uncertaintly created by President Donald Trump's trade war.</p><p>The S&P 500 fell in the first hour of trading Tuesday.</p><p>The Dow Jones industrial Average lost  229 points, about 0.6%, as that composite sank 1%,  two big AI companies related led declines: chip companies Nvidia and Palantir technologies.</p><p>Mattel said it was withdrawing its forecasts as it becomes more difficult to predict how many shoppers will spend over the rest of a year.</p><p>Ford also pulled its forecast.</p><p>Seth Sutel, New York.</p>
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