Brent notches biggest weekly gain since 2009

Oil prices rallied for their best week in at least five years on Friday, steadying above $USUS51 a barrel, following OPEC's decision to cut crude output to rein in a global glut that has weighed on prices for more than two years.

After the deal was announced on Wednesday, the market focused on the implementation and impact of OPEC's first output cuts since 2008, to be joined by Russia and possibly other non-OPEC producers.

Reuters