A discouraging report suggesting the U.S. economy may have shrunk at the start of the year, before most of President Donald Trump's announced tariffs could take effect, is undercutting U.S. stocks on Wednesday. The S&P 500 was 1.4% lower in early trading and on track to break a six-day winning streak. The Dow Jones Industrial Average was down 396 points, or 1%, as of 9:35 a.m. Eastern time, and sharp drops for such AI superstars as Super Micro Computer had the Nasdaq composite falling a market-leading 2%. The weaker-than-expected report on the U.S. economy surprised financial markets because economists were expecting to see modest growth, particularly after the economy closed last year running at a solid pace. But importers rushed to bring products into the country before tariffs could raise their prices, which helped drag on the country's overall gross domestic product.