Oil commodity futures are in demand as financial instruments in a different way than when they were used primarily as a way for refiners and distributors to manage the risk on their physical market activities. As that demand grows--as more individuals, companies, and hedge funds want to participate in the oil market, without a link to any physical supply or demand for the commodity--then the price of these instruments ought to rise, in tandem. But with the price of most physical oil pegged to a futures market, whether for WTI or European Brent crude, that demand can influence the physical market, as well, without changing the real supply or demand by one barrel.
