The dollar tumbled to a near five-month low against the yen and a 2-1/2-week trough versus the euro on Friday.
The dollar rose on Thursday, bolstered by gains in the U.S. stock market and a rebound in oil prices.
President Vladimir Putin has sounded more conciliatory toward the West recently, and there may be more of that coming.
The euro regained its footing against the U.S. dollar as risk appetite soured anew late in the afternoon.
The dollar rose for a third straight session as gains on Wall Street and calmer financial markets enhanced risk appetite.
Returns ahead will likely be less robust, but the selloff has made Europe's stocks more attractive, Allianz GI's CIO for global equities said.
The low-yielding euro fell for a second session, as steadier global stock markets prompted investors to seek other currencies.
Societe Generale is advising adding emerging market assets after a horrid 2015, with a somewhat unlikely name at the top of its wish list: Russia.
The dollar climbed Friday on measures taken by China to ease this week's market turmoil and a hefty rise in U.S. jobs in December.
It hit a one-month low of $1.0709 two days ago.
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.
Lothar Mentel, chief investment officer at Tatton Investment Management, says he expects prices to stabilize higher than they are currently.
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.