Maybe I'm just into conspiracy theories, but isn't most of the refining capacity in north america controlled by only a few companies? So them setting the price arbitrarily isn't much of a stretch for me. Prices here move by 5% now overnight based on nothing really. I think they play with the prices to maximize profits without raising such an uproar that the public will call for some sort of regulation of prices.
Really, I think energy usage isn't really a good fit for totally free markets, people can't change their source or consumption easily enough for the supply demand model to work. Then you add virtual monopolies and we get strange pricing...
Ian
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