The retailer's results come a day after rival Walmart Inc WMT.N trimmed its profit forecast. By Amruta Khandekar and Noel Randewich May 18 (Reuters) - Wall Street tumbled on Wednesday, with Target losing a quarter of its stock market value and highlighting worries about the U.S. economy after the retailer became the latest victim of surging prices. Rising inflation, the conflict in Ukraine, prolonged supply chain snarls, pandemic-related lockdowns in China and monetary policy tightening by central banks have weighed on financial markets recently, stoking concerns about a global economic slowdown.