For the last few months, EU politicians have whined about the appreciating Euro.  Aside from some token comments by the European Central Bank, however, the world failed to pay heed.  That changed last week, when the G7 formally and harshly warned that volatility in forex markets risks harming the global economy. But talk is cheap, and the real question is whether it will be backed up by action. Most analysts reckon that it will be difficult and would take time for the governments of the EU, US, and Japan, at the very least, to put together a coordinated plan of intervention.  Besides, the window has probably closed on action by Central Banks, which have conducted monetary policy irrespective of currency valuations. Reuters reports:

The U.S. Federal Reserve Board [is] nearing the end of its interest rate-cutting cycle, the European Central Bank [is] likely to reduce rates before the end of the year, and things might not get much worse for the U.S. economy. That suggests the dollar may recover in the coming months, with or without official intervention.

Read More: G-7 leaders talk tough on currency markets