There is also market instability because Putin's national budget for next year was based on oil trading at no less than $105 a barrel. He is now going to run out of money. People over there shoot people for less.
America is getting the blame from OPEC and Russia because of the massive increases in production from the shale plays here. Part of the reason for the drastic drop is an attempt by OPEC and Russia to run the small operators out of business and cut the competition for oil sales. The smaller operators can't stay afloat with oil so low. They get wiped out, and there are fewer companies selling oil. OPEC and Russia are hoping they can hang on and not get dragged under while the little guys sink.
The prediction I heard today is that this is going to be a "V" shaped crash. Rock bottom, then straight back up, stopping at about $80 a barrel by the end of Q1.