"Oil is a fungible commodity" - discuss. Is it? How much is sold on forward contracts like Venezuela's new contracts with China? How much is sold on the spot market? Does anyone know?
Interesting that you should mention Venezuela.  It seems to me that insofar as they offer oil on a priority basis and at a discount rate to close allies such as Cuba, oil is not fungible.  Or am I wrong about this?  (Not that I find Venezuela's policy objectionable - quite the contrary, actually.)