At its birth in 1948, the West German Deutsche mark scarcely seemed to be a currency that could produce a miracle. Most of the country’s war-wrecked industry still lay in ruins; the economy was torn ...

The euro is the official currency of the eurozone. It is used by the institutions of the European Union and by 19 of its 28 members. Globally, it is the second-most traded money and reserve currency, ...

Two months ago, some in Tokyo joked that we no longer carry yen in our wallets, but Japanese “pesos” or “rupiah.” Now, with the yen up more than 12% since mid-July—and perhaps headed for even bigger ...