Treasury yields have remained largely unchanged as markets await the expected second round of peace talks between the U.S. and Iran, where Iran has not committed to further negotiations amid threats of military force from President Trump. The 2-year Treasury note yield, which closely tracks short-term Federal Reserve interest rate policy, was more than 1 basis point higher at 3.735%. The longer-dated 30-year bond yield was down less than a basis point at 4.878%. The 10-year U.K. Treasury note, the key benchmark for U.N. government borrowing, was flat at 4.,254%. Meanwhile, traders will be monitoring Federal Reserve chair nominee Kevin Warsh's confirmation hearing.