The "sell America" trade is in full swing Tuesday morning after President Donald Trump and European leaders escalated tensions over Greenland. U.S. bond prices tumbled, sending yields spiking. The U.S. Dollar Index, which weighs the greenback against a basket of six foreign currencies, fell nearly 1% on Tuesday. The euro jumped 0.7% against the dollar. "This is sell America' again within a much broader global risk off," Krishna Guha, head of global policy and central banking strategy at Evercore ISI, wrote in a note to clients.