Lol...sure they have.
Many market watchers had expected big commodity-trading firms to capitalize on the price gap between different oil-futures contracts by buying physical barrels, storing them on ships and locking in profits by selling futures contracts for delivery further out in the future.
http://www.freerepublic.com/focus/f-news/3262234/posts
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Some may be betting on a higher price. But there have been many locking in profit at the time they put oil in storage. The futures price just a few months out has stayed higher than the cost to store for many months now.
http://online.wsj.com/mdc/public/page/2_3028.html?category=Energy&subcategory=Petroleum