How yuan-dollar became the world’s most closely watched asset price

A PRINCIPLE FOLLOWED by traders who speculate on short-term movements in market prices is “cut your losses early”. This doctrine finds expression in the stop-loss—an order to sell a security, such as a company share, automatically when it hits a predetermined price. People being people, stop-loss orders tend to cluster at salient levels, such as whole or round numbers. They might instruct a broker to sell the pound at $1.20, say, or sell Apple at $200.

The round-number fetish is a strange one. But when a situation is uncertain (and financial markets are always uncertain) arbitrary numbers or thresholds are often charged with great meaning. And few have had the significance of seven yuan per dollar. So when the yuan broke through seven on August 5th, it prompted a violent sell-off in stocks and a rally in bonds. That was followed by a formal charge by the US Treasury that China was manipulating its currency.

On the face of it, that looks like an overreaction. If things were fine when the yuan was at 6.99, why did all hell break loose when it reached 7.01? Odder still is the idea that a currency that has only fairly limited use outside China is suddenly a prime mover in global capital markets. Yet China’s heft in the world economy has made it so. The yuan-dollar exchange rate is now the world’s most watched asset price....

via The Economist: Finance and economics Business Feeds

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