What caused China's 'Black Monday'? BBC News

Panic selling in markets across Asia has sent global shares tumbling, with China's main index down nine per cent. China is the world's second largest economy and recent slowdowns in manufacturing and commodities - coupled with a weaker dollar - are behind the falls. John Sudworth reports. Subscribe to BBC News HERE http://bit.ly/1rbfUog Check out our website: http://www.bbc.com/news Facebook: http://www.facebook.com/bbcworldnews Twitter: http://www.twitter.com/bbcworld Instagram: http://instagram.com/bbcnews