CNBC | Oil steadies near 4-year highs after volatile week of trading on Iran sanctions CNBC Oil prices steadied just below four-year highs on Friday as U.S. sanctions curbed Iran's exports, tightening global crude supply. International benchmark Brent crude oil futures was down 5 cents a barrel at $84.53 by 8:29 a.m. ET (1229 GMT). On ... Oil Edges Up as Market Refocuses on Supply Shortages Oil rises as Iran sanctions create worry about supply shortfall Crude oil futures rebound after $1/b overnight fall on Saudi comments |