Commodities tumble as gloom spreads

Commodity markets took a tumble this week on the strong dollar and Chinese demand fears, with major lows for copper, gold, crude oil and zinc. The prices of many raw materials were hit by concerns over flagging demand arising from weak economic growth in key consumer China. "What we have seen lately is that market concerns about US monetary tightening, dollar strength and China’s slowdown trump concerns about tightening supply-side fundamentals," said UniCredit analysts in a note to client