“There are still not enough signs of investment beginning to return, and that raises the risk of tightening of the global crude oil market in the next five years and a risk to the stability of oil prices. There is at least a possibility of going back to the situation we had 10 years ago where crude oil prices were very, very high at a time when demand was growing.”

—-  Neil Atkinson, head of the oil markets and industry division, International Energy Agency