Copper prices rose past a key psychological level of $10,000 a tonne on Wednesday, buoyed by optimism about global economic recovery, but trading volume was tepid due to China market holidays. Three-month copper on the London Metal Exchange rose as much as 0.6% to $10,030, its highest level since February 2011 when the contract hit its record high of $10,190 a tonne. Aluminium advanced 0.5% to $2,441 a tonne at 0338 GMT, nickel increased 1.2% to $17,885 a tonne and tin climbed 1.9% to $29,535 a tonne. The U.S. economy is growing at its fastest rate since the early 1980s while British manufacturing activity grew at ... (full story)