The Canadian dollar weakened against the greenback on Monday, and the yield on benchmark government debt climbed. The loonie was trading 0.2% lower at C$1.3703 to the greenback, or 72.98 U.S. cents, after trading in a range of 1.3664 to 1.3708. Canadian government 10-year bond yields rose 3.1 basis points to 3.507%. The yield on similar U.S. government benchmark debt rose to 4.4415%. U.S. August crude futures rose 48 cents to $82.02 a barrel on Monday.