Copper steadied and aluminum rose after a turbulent week for metals dominated by growing concerns over the state of the global economy. While metals markets were calmer Friday, prices have endured a dismal few days on fears about monetary tightening as well as demand from top consumer China. Copper -- often seen as an economic bellwether -- is heading for its sixth weekly decline in London. Federal Reserve Chair Jeromy Powell on Thursday pushed back against speculation of more aggressive interest-rate hikes. But weaker global growth remains a key worry across markets, especially with China’s still-uncertain battle to ... (full story)