Photographer: Jerome Favre/Bloomberg

The Euro Is Weaker Than You Thought, and the Reason is China

The ECB's updated currency weightings show the unmistakable shift in Europe's trade profile

Everyone knows that the world's economic center of gravity is shifting toward Asia. What's less obvious is the impact that can have on major reserve currencies.

The European Central Bank has shed some light. The Frankfurt-based ECB has published its periodic reassessment of the relative weights of the 38 currencies it tracks to calculate the effective exchange rate of the euro. Those reflect the importance of a country as a trade partner for the single-currency bloc.

The latest update, which takes account of trade developments between 2010-2012 and was published by the ECB this week, makes China's rise to prominence unmistakable. It now accounts for almost 18 percent of the ECB's basket of currencies, from little more than 4 percent in 1995-1997.

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