What causes oil prices to drop?

Related questions

1. Why did oil prices rise in 2008?
2. What was the oil price in 2014?
3. How much did oil prices drop in 2014?
4. Why is the price of oil low?
5. What makes oil prices fall?
6. Why did the oil price drop in 2014?
7. What was the oil price in 2008?
8. Why did oil prices drop in 2009?
9. Which oil exporting country is not a member of OPEC?
10. Why is the price of crude oil falling?

Tags

1. #supply
2. #europe
3. #stock
4. #prices
5. #demand
6. #cause
7. #steady
8. #excess
9. #commodity
10. #coupled
11. #caused
12. #attributed
13. #china
14. #lower
15. #change
16. #sharply