Dollar languishes near 3-week lows on Fed question marks

Federal Reserve vice-chair Stanley Fischer was the latest to sound mixed on the chances of a hike by December that markets had been viewed as a certainty until worries grew over China and developed economies' ability to stand a rise in dollar rates.

The retreat in Fed rhetoric has helped drive the U.S. currency almost 10 cents lower against the euro from this year's highs. But ironically its woes in the past week have as much to do with a recovery for the same emerging markets at the root of the Fed's concerns, as well as commodity price-linked currencies like the Australian and New Zealand dollars.