The dollar weakened against a basket of currencies on Wednesday after the release of the FOMC minutes from its December meeting.
The yen rose on Tuesday as traders sought safety in the low-risk currency on anxiety about sluggish global growth.
The Japanese yen rose broadly, as financial market turbulence sent traders scrambling for the traditional low-risk currency.
The dollar ended 2015 with a more than 9 percent annual gain against a basket of currencies on Thursday.
The U.S. dollar rallied against commodity currencies such as the Norwegian crown and Russian ruble on Wednesday.
The U.S. dollar gained against the euro on Tuesday after greater risk appetite hurt demand for the shared currency.
The U.S. dollar held near a more than one-week low against a basket of major currencies on Monday.
The dollar fell against a basket of currencies on Thursday, putting it on track for its steepest monthly loss since April.
The dollar rose in thinned trading on Wednesday after data painted a mixed picture of the U.S. economy.
The dollar slipped against a basket of currencies on Tuesday as more traders booked profits on bullish greenback bets.
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.