| Arrium director and former Rio Tinto strategy chief Doug Ritchie said the dramatic fall in commodities has been exacerbated by speculative bets placed by hedge funds, which has resulted in steeper price falls for iron ore, coal and copper than in previous mining busts.
"With derivatives, when sentiment is upwards its going to have the impact of pushing commodity prices higher. And when sentiment is negative it is going to have a big impact pulling prices lower," says Doug Ritchie, Arrium...............................................Full Article: Source
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