Motivated by the political prudence and economic wisdom it lent foreign currency to other nations. In 2008, when Argentina, Indonesia and South Korea were confronting with short-term liquidity problems, China's credits rescued them timely (Wharton University 2011). Additionally, it encouraged its domestic companies to invest abroad with US dollar in exchange for renminbi. Thanks to the instant and other measures its outward FDI jumped from US $90 billion in 2006 to US $230 billion in 2009. The options are not vast in front of Chinese managers of the monetary policy. It seems that as its currency is pegged with US $ its economy is unwittingly entangled with fate of US economy. Both might share market-based ups and downs felt in either country. In case China decides to convert US $ into other currencies like euro it might discredit the former and as a result China's investment in US assets might lose its value. Secondly, if it decides not to invest anymore in US assets the consequences will also not be different.
Moreover, in case of stopping buying US treasury bills, the cost of borrowing within US might go up, making US exports to China more expensive, hurting Chinese exporters and consumers. Under these circumstances, the US has been refrained from applying some protective measures on Chinese products bound to the US. To the US, it gives some assurance that China will not take any action haphazardly that could affect US assets.