It would also cause a spike in US bond yields, hammering the US housing market and perhaps tipping the economy into recession. It is estimated that China holds over $900bn in a mix of US bonds.
Xia Bin, finance chief at the Development Research Centre (which has cabinet rank), kicked off what now appears to be government policy with a comment last week that Beijing's foreign reserves should be used as a "bargaining chip" in talks with the US.
"Of course, China doesn't want any undesirable phenomenon in the global financial order," he added.
He Fan, an official at the Chinese Academy of Social Sciences, went even further today, letting it be known that Beijing had the power to set off a dollar collapse if it choose to do so.
"China has accumulated a large sum of US dollars. Such a big sum, of which a considerable portion is in US treasury bonds, contributes a great deal to maintaining the position of the dollar as a reserve currency. Russia, Switzerland, and several other countries have reduced the their dollar holdings.
http://www.telegraph.co.uk/money/main.jhtml?xml=/money/2007/08/07/bcnchina107a.xml
Note: http://www.telegraph.co...

And the Bank of Canada has been increasing it's reserves of the greenback.
Do I hear a flushing sound?
---
The preceding comment deals with mature subject matter, however immaturely presented. Viewer discretion is advised.
Not to mention the multimillion dollar job, or jobs, waiting for governor David Dodge, with US based multinationals, after he retires.
Ed Deak.