I am new to economics, I am reading a post on CNBC which states
Weekly crude oil inventories unexpectedly fell, supporting further gains in oil prices.
1) Why does crude oil inventories unexpetedly falling make oil prices rise?
2) By Crude oil inventories falling do they mean stock running out due to mass purchase?
3) What could cause oil inventories to unexpectedly fall?
I am assuming a purchase from somebody lowering stock overall could cause panic buying from others therefore temp demand making prices rise? - Probably wrong.