CNBC | Oil prices slide after IEA warns of further oversupply CNBC Brent crude was on track for its lowest weekly close since 2008 on Friday as the International Energy Agency (IEA) warned global oil oversupply could worsen in the new year. Output in the Middle East continued to rise, figures showed this week, despite ... Oil Falls After IEA Warns of Continuing Supply Glut Oil slides to new seven-year low as IEA warns of worse glut IEA Sees Oil Glut Lasting to Late 2016 as OPEC Keeps Pumping |