The latest round of U.S. sanctions targeting two of Russia’s largest oil exporters has pushed crude oil prices higher, with benchmarks on course to end the week with a gain after a string of losses. At the time of writing, Brent crude was trading at $65.63 per barrel, with West Texas Intermediate at $61.43. Both were slightly down from Thursday but on course for a substantial uptick since Monday, adding some $4 per barrel each in the period. The first reports about the effect of the latest U.S. sanctions, which target Rosneft and Lukoil,…