OPEC is an international Organization of 11 oil-exporting developing nations that co-ordinates and unifies the petroleum policies of its Member Countries. OPEC seeks to ensure the stabilization of oil prices in international oil markets with a view to eliminating harmful and unnecessary fluctuations, due regard being given at all times to the interests of oil-producing nations and to the necessity of securing a steady income for them; an efficient, economic and regular supply of petroleum to consuming nations; and a fair return on their capital to those investing in the petroleum industry.