Most U.S. stocks fell 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 to close out its third losing month in the last four. The Dow Jones Industrial Average fell 0.9%, and the Nasdaq composite climbed 0.2%. Stocks initially headed for gains following an encouraging update on inflation. But they turned lower as reports also suggested the U.S. economy was stronger during the spring than earlier thought. That helped yields remain high in the bond market, which in turn kept up the pressure on stocks.