Turkey's central bank has more than doubled some of its core interest rates. 'Anatomy of the Bear' author Russell Napier and John Authers discuss whether this drastic action will work and what can alter slowing growth in emerging markets.<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br />Subscribe to the Financial Times on YouTube; http://goo.gl/vUQx5k<br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes