The biggest rally in copper in three months is reversing as analysts predict that the largest glut in 13 years will overwhelm consumption from an accelerating Chinese economy, which uses two in every five tons.
Production will exceed demand by 408,000 metric tons next year, the most since 2001, compared with 167,000 tons in 2013, the average of 15 analyst estimates compiled by Bloomberg shows. Futures rose 3.2 percent in August, the most in three months, on signs of an expansion in Chinese manufacturing. Prices will drop 6.1 percent to $6,800 a ton by the end of December, the median of 13 analyst and trader predictions shows.
Copper is falling with all other metals this year after a decade when prices rose fivefold. Producers from Rio Tinto Group to BHP Billiton Ltd. added 3.4 million tons to output since 2003, about what Europe uses in a year, and Morgan Stanley expects another 4.1 million tons by 2017. While prices are 29 percent below the record set in 2011, they are still about 50 percent higher than what the costliest mines need to break even, Macquarie Group Ltd. estimates.
“We’re having this big wave of copper supply growth,” said David Wilson, an analyst at Citigroup Inc. in London who has followed metals for almost two decades.