The Canadian dollar weakened against the greenback on Friday, and the yield on benchmark government debt slipped. The loonie was trading 0.1% lower at C$1.368 to the greenback, or 73.1 U.S. cents, after trading in a range of 1.3611 to 1.3691. Canadian government 10-year bond yields fell 8.6 basis points to 3.652%. The yield on similar U.S. government benchmark debt fell to 4.4995%. U.S. June crude futures fell 84 cents to settle at $78.11 a barrel on Friday.