Many of us learned, however, that while there may not be such a thing as too much speculative money, that same money might be too concentrated. We saw very large concentrations of trader positions in 2008. That has continued. Since then, we saw one trader hold more than 20 percent of the crude oil market. Even earlier this year, one trader held over 40 percent of the silver market. http://www.cftc.gov/PressRoom/SpeechesTestimony/opachilton-35.html So, Copper on LME 50%-80% in the hand of "one trader", silver 40 %, oil 20 %. And you thought, you are executing in a "free market environement" ? Hum : NO.