Denials and devaluation as China's currency tumbles to five-year low

Weaker yuan revives fears of a currency war, a global conflict by other means that directly affects millions of workers

The phrase "currency war" speaks to a seemingly phoney battle between the world's major trading powers over the price of exports. It has all the attributes of an illusory conflict because no one ever agrees that a genuine dispute has taken place. And as long as everyone denies they have drawn swords to slash their currency to compete with rival powers, talk of a war fizzles and dies.

There is a fringe constituency of analysts who have long argued that, much like the hundred years' war of intermittent battles between England and France, currency wars make headlines only when there is a lurch in policy, which is the equivalent of deploying archers and unleashing the cavalry.

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