This video (watch out for the very high sound level) summarises the reason for the reduction in oil and related prices in recent months. Global politics. I also find it interesting that the key meeting setting this up occurred on September 11 (9/11) this year. These goons are so hooked on their view of numerology.
Also, don’t make the mistake of thinking the US is driving this. Remember they are just the stalking horse for those who run the global game and control virtually all countries through their reserve banks (the issuance of money) and other mechanisms.