FA, I may be confused, but it is my understanding that the Commercials are the producers and tend to use contracts to hedge future price risk, even sometimes taking/making delivery of the commodity, while, OTOH, the Non-Commercials are the funds and other "big" players merely speculating upon price movement.
IMO, if there were manipulation in this market (and I am not saying there is), it would more likely be the Non-Commercials doing it, not the Commercials.
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