Oil slips as IEA warn stocks may approach all-time high

By Himanshu Ojha LONDON (Reuters) - Brent crude future prices slipped on Tuesday after the International Energy Agency (IEA) warned that oil prices may decline as stocks continue to increase this year. Oil stocks held by countries in the Organisation for Economic Cooperation and Development may come close to the all-time high of 2.83 billion barrels in the middle of 2015, said the IEA, which advises the West on energy policy. "Despite expectations of tightening balances by end-2015, downwar