The dollar retreated from session highs as the Canada dollar and Mexican peso saw sharp swings amid Nafta developments.
The greenback was still higher versus almost all its G-10 peers, as the loonie and peso rebounded after briefly sinking on an earlier Nafta report. The Bloomberg dollar index was on track to finish the session higher by less than 0.1 percent after rising as much as 0.4 percent to its highest since Oct. 6. The euro was mixed amid lingering concerns over Catalonia, with trading flows driven largely by short-term accounts.
