The dollar fell to eight-and-a-half-month lows against the euro and a currency basket on Friday on expectations the U.S. Federal Reserve may delay scaling back its monetary stimulus following this month's political battles over the budget.

Analysts said concerns about the negative impact on the U.S. economy and the likelihood the Fed would leave its bond-buying program intact until well into next year would weigh on the dollar, leaving the euro the potential to rise towards $1.40.