Tokyo stocks snapped a four-day winning streak Thursday, with the Nikkei briefly losing over 2 percent, on concerns that surging commodity prices may squeeze corporate profits and cause the global economy to slow down.The 225-issue Nikkei Stock Average ended down 508.36 points, or 1.89 percent, from Wednesday at 26,402.84. The broader Topix index finished 24.61 points, or 1.31 percent, lower at 1,860.08.On the top-tier Prime Market, decliners were led by marine transportation, insurance and service issues.The U.S. dollar weakened and mostly traded in the upper 128 yen range as Japanese impo…READ FULL ARTICLE