Why the fall in China's currency matters

The renminbi is close to its lowest level against the US dollar for a decade. The FT's Emma Dunkley looks at what's causing China's currency to fall and its impact on global investors<br /><br />► Subscribe to FT.com here: http://bit.ly/2GakujT<br /><br />► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<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