The U.S. dollar edged up versus the safe-haven yen and dropped against the euro on Tuesday as investors were uncertain about the U.S. economic outlook while awaiting a strong run of data once the U.S. government shutdown ends. Markets are providing mixed signals about risk appetite, with Wall Street futures falling on concerns over elevated technology valuations, but European shares rising to a two-week high  Growth-sensitive currencies such as the Australian dollar and British pound have