Market speculation.Crude oil and finished oil trading in the open market. Can't avoid speculation of the market. In addition, this phase again, new version of speculators in the market more. As most of the investors, which is in the form of a Fund Manager and a hedge fund in oil at the same time, it is a product in the market, increasing attention from investors and arbitrage. There is a possibility that such speculation had thrust increases the volatility of oil prices.
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