The Week in Oil: Brent Climbs Above $105 As Focus Remains on Mideast Diplomacy, Physical Tightness

By Giulia PetroniHere's a look at what happened in oil markets in the week of Sept. 21-25 and what the focus will be in the days to come.OVERVIEW: Oil prices are headed for weekly losses, though Brent crude remains above $100 a barrel as traders weigh prospects for U.S.-Iran diplomacy against conti…