► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />Copper has fallen to a five-and-a-half-year low, hit by Chinese selling on growth worries. Lex’s Rochelle Toplensky and Alan Livsey discuss what has triggered the sharp drop and how producers will fare at this price.<br /><br />► Lex: http://bit.ly/1I14JZF<br /><br />► FT Analysis Review: http://bit.ly/1SrwTzR<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes