Hedge funds Andurand and Rokos took big copper bets before spike
The trades are part of a broader deluge of investment into the copper market, with the value of long positions held by fund managers in London and New York futures tripling this year.
President pushed for a review of the 2008 infrastructure for minerals deal with Sinohydro Corp and China Railway Group to bring more benefits for Congo, the world's biggest cobalt producer.
The proposed $39 billion combination has more than enough components to trigger intense oversight by regulators concerned about implications for market concentration and access to key minerals.