The Canadian dollar weakened against the greenback on Wednesday, and the yield on benchmark government debt slipped. The loonie was trading 0% lower at C$1.3586 to the greenback, or 73.61 U.S. cents, after trading in a range of 1.3572 to 1.3613. Canadian government 10-year bond yields fell 6.6 basis points to 3.937%. The yield on similar U.S. government benchmark debt fell to 4.5747%. U.S. November crude futures fell 97 cents to $85 a barrel on Wednesday. The value of building permits in Canada rose 3.4% in August, Statistics Canada said.