The Canadian dollar is really strong today. Together with that,...

The Canadian dollar is really strong today. Together with that, it's easy for currencies from resource-dependent and emerging market countries to rise, putting selling pressure on the dollar.Mexico's peso currency strengthened to a seven-week high versus the dollar, at one point gaining about 0.85 percent to 18.54 per dollar.The yen , meanwhile, weakened to 113.96 per dollar, reaching its lowest since the middle of November 2017 before paring some losses. It last traded 0.2 percent higher at 113.90 per dollar.The greenback has risen four straight weeks against the Japanese currency, including a nearly 1 percent gain booked last week.