Traders focused their attention on slumping commodities prices, on the global economy and central bank policies.
The dollar tumbled against the Japanese yen on Friday after the Bank of Japan merely tweaked its monthly asset-purchase program.
The U.S. dollar hovered near a two-week high against a basket of other major currencies a day after the Fed hiked interest rates.
The U.S. dollar lost some ground on Wednesday, after the Federal Reserve decide to raise interest rates for the first time in nearly a decade.
The U.S. dollar rebounded from a roughly six-week low against the euro on Tuesday.
The dollar turned positive, after edging lower on worries that oil prices and credit market turmoil could limit U.S. interest rate hikes.
The dollar fell on Friday against key world currencies amid a selloff sparked by market volatility concerns.
The Swiss franc rose against the euro on Thursday after Switzerland's central bank kept interest rates on hold at record lows.
The dollar fell on Wednesday as commodity currencies reversed steep losses from Tuesday as oil recovered.
The dollar soared against oil-linked currencies on Tuesday, touching an 11-year high against the Canadian dollar.
The dollar rose broadly on Monday on expectations the Fed is on track to raise interest rates next week.
The U.S. dollar was higher against the euro on Friday after stronger-than-expected U.S. monthly jobs data.
The U.S. dollar hit a nearly one-month low against the euro on Thursday after the European Central Bank cut its interest rate on deposits.
The U.S. dollar climbed to its highest against the euro in more than seven month.
The dollar fell as a contraction in U.S. manufacturing employment and upbeat European economic data knocked the greenback from 8-1/2-month highs.
The dollar reached an 8 1/2-month high on Monday, as the prospect of further stimulus from the European Central Bank drove the euro lower.
The dollar hit an eight-month high against a basket of currencies on Friday.
The euro fell back towards seven-month lows against the dollar and shed ground against the yen as investors piled on bets against it.
The dollar rose after strong economic data further backed the case for the Federal Reserve to raise interest rates.
The U.S. dollar edged down as investors piled into safe-haven currencies on concerns about rising tension between Russia and Turkey.