Copper prices in London extended declines on Friday, heading for the biggest weekly loss in four weeks, driven by a strong dollar and patchy data from major economies including top metals consumer China. Three-month copper on the London Metal Exchange (LME) was down 1.1% at $8,227 per metric ton by 1038 GMT. The contract is down 3.1% this week. “Day-to-day trading of base metals prices is mainly U.S. dollar-led these days, with mixed signs of manufacturing activity performance in and outside China,” said John Meyer, head of research at SP Angel in London. The dollar fell on Friday but was still heading for its ... (full story)