Brent oil topped $70 a barrel with optimism building about the demand outlook in key regions such as the U.S., and on signs that a glut built up last year has been whittled away. The global benchmark added as much as 1.1% reaching its highest since March 8, while U.S. crude futures briefly topped $67 a barrel. The global benchmark hasn't had a sustained period above $70 since 2019.