The Canadian dollar weakened against the greenback on Tuesday, and the yield on benchmark government debt held steady. The loonie was trading 0.2% lower at C$1.3437 to the greenback, or 74.42 U.S. cents, after trading in a range of 1.34 to 1.3438. Canadian government 10-year bond yields fell 0 basis points to 3.449%. The yield on similar U.S. government benchmark debt fell to 4.0605%. U.S. March crude futures fell 63 cents to $76.15 a barrel on Tuesday.