Most U.S. stocks fell Wednesday as Wall Street contended with the downside of a U.S. economy that keeps powering through its many challenges. The S&P 500 slipped 0.3% Wednesday after erasing gains from the morning following an encouraging report that said inflation wasn’t as bad last month as economists expected. The Dow Jones Industrial Average fell 0.9%, and the Nasdaq composite climbed 0.2%. Stocks turned lower after reports suggested the U.S…