Analysts in Shanghai expect that the Chinese renminbi, the principal unit of which is the yuan, will be fully internationalised by 2012.Speaking to the times, Barclays Capital's chief China economist Wengsheng Peng explained that China is keen to escape the 'dollar trap' - the problem affecting exporting countries which are forced to store large portions of foreign reserves in the US Treasury. Mr Wengsheng added that the global financial crisis had brought home the volatility of doing this during times of economic contraction, while China's ambitions for growth have "brought to the fore the importance of increasing the use of the renminbi in international trade and finance".It is expected that the renminbi could become the third most actively traded currency in the world within the next three years, usurping the yen and challenging the euro and the dollar.Meanwhile, the Financial Times reports that in equities markets, Hong Kong Exchanges and Clearing last week overtook the CME Group as the world's largest exchange by its own market capitalisation.