Trading is a zero sum game. It takes ‘losers’ to give ‘winners’ their profits. For example from Yahoo! Finance:
“China stands to lose at least 100 million US dollars on the London Metal Exchange after a bet by a state commodities trader went spectacularly wrong, a press report says. Citing a source close to China’s State Reserve Bureau (SRB), the South China Morning Post reported that SRB copper futures trader Liu Qibing took short positions equal to about 130,000 metric tonnes of copper in July and August. At the time, Liu paid about 3,300 dollars a tonne, expecting the price of copper to decline. Copper prices for delivery in three months’ time are now about 4,119 dollars a tonne, the paper said. “Liu disappeared from the market in early October and that week the bureau recovered about 50,000 tonnes of short positions on the London Metal Exchange, which pushed prices up to about 3,800 dollars a tonne,” the source said. “He has been singled out by the bureau as a scapegoat, but he was only acting according to bureau regulations and procedures.”
(more…)