equally an oil producer could short on the very same contracts the vast speculator is going long on, dump oil onto the market just before the settlement and take all their money
markets can be manipulated to some degree, but long term these manipulations cannot overwhem the influence of real supply and demand. hence bubbles, which always burst. suggesting that 60% of the spot barrel price is due to manipulation of derivatives is just preposterous, which made me check out Mr. Engdahl ... who appears to be a bit of a conspiracy nutter, and rather unqualified to write books on this stuff with any authority.
“The popular fear of [speculation] may be compared to the popular terrors and suspicions of witchcraft."
Adam Smith.edit: to be clear, I'm arguing that theres nothing intrinsically wrong with derivatives markets, that they are infact a good thing.
but only with appropriate regulation.