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A Mercedes Benz plant in Kecskemet, Hungary. Sandor Ujvari/Associated Press


More generally, mature economies should be expected to generate current-account surpluses because capital offers higher returns in developing economies. German, Dutch and Swiss capital is financing investment and consumption in poorer countries

The U.S. is an exception: From 2000-08 alone, the U.S. imported $5.3 trillion of capital, including $1.6 trillion of foreign direct investment. Without investment from abroad, the development of the American economy would have been much more sluggish over this period. It is somewhat ironic that the world's largest importer of capital is complaining about other countries' exports of capital.

But both the foreign critics and many German commentators have missed an important dimension of the problem. Germany's capital exports have been resulting in massive losses. German portfolio investment abroad has been much less successful than FDI. If capital had been invested wisely, German claims on the rest of the world would have been at least as high as the cumulative current-account surplus of €1.275 trillion generated between 2000-12. The actual figure is €1.013 trillion because a whopping €269 billion had to be written off. In effect, a substantial chunk of German exports were given away.

The European Commission, subtracting the current valuation of German investment abroad from its peak value, suggests an even more depressing depreciation of €650 billion, equivalent to two years' spending by the German federal government. Germans, in essence, are competitive producers of goods but foolish exporters of capital. The real way for Germany to improve its business model would be to end its amateurish approach to portfolio investment abroad.


Mr. Dieter is a senior fellow at the German Institute for International and Security Affairs and a visiting professor for international political economy at Zeppelin University in Friedrichshafen, Germany.