Shanghai is the centre of China’s banking industry and home to the Chinese stock market – which quadrupled in value in little more than a year before worries about the economy overheating resulted in wild fluctuations in June 2007. Banking and finance, information technology, electronics, chemicals and petrochemicals are all key industries. Shanghai is China’s largest car manufacturing centre. It is expected to be the world’s biggest shipbuilding base by 2015 and currently 70% of the world’s laptops are produced in the Yangtze delta, a figure predicted to surpass 87% by 2010 according to US-based IT market intelligence firm iSuppli.