Milton Friedman Proved Wrong by Aluminum Market

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April 11 (Bloomberg) -- Commodity prices have fluctuatedsubstantially over the past few years. The controversialquestion is, are financial speculators to blame?

In general, prices are determined by underlying forces ofphysical supply and demand. But with regard to at least onecommodity -- aluminum -- and at least for brief periods of time,new research suggests that financial flows can indeed influenceprices significantly.