The sound and fury in the United States over China's valuation of the yuan reminds me of nothing so much as a scene in Avatar in which the soldiers from Earth prepare to destroy the Tree of Souls on Pandora.

As MarketWatch.com remarked last Friday, China's critics are "smelling blood".

There is one difference. In Avatar, the aggressors who cry for "terror against terror", led by Colonel Miles Quaritch, are mostly soldiers.