The dollar gained on Friday as concerns about continuing low oil prices added to deflation fears in the euro zone and Japan.» Read More
Sterling firmed against a weaker euro on Tuesday after European monetary policy makers signaled possible monetary easing to avoid deflation.
The euro was hurt by signs that growth was slowing in the euro zone's largest economy, Germany.
Data showing a record euro zone trade surplus in January helped the euro rise against the dollar for the first time in three days.
The dollar steadied against major currencies on Thursday after being jerked higher overnight by a Federal Reserve message that a rate hike would be sooner than expected.
The dollar rose against the yen and euro on Wednesday, following the Federal Reserve's announcement it will further unwind monetary stimulus.
A modest easing of tension in Ukraine and a slight increase in U.S. Treasury yields sent the euro on Tuesday against the U.S. dollar and the yen.
The yen heads for its biggest weekly gain in more than a month against the dollar, on tensions in Ukraine and the Chinese economy.
Fears the crisis in Ukraine could intensify led traders to the safe havens of the Japanese yen and Swiss franc.
Concerns about China and other developing economies weakened the Australian dollar and currencies closely linked to commodities markets.
The ECB's forward guidance may adjust policy to tighten the slack in the Euro zone economy, a senior ECB official said.
The U.S. dollar was supported by hopes U.S. job growth would pick up in the wake of last week's data.
Unexpectedly strong non-farm payroll data boosted the dollar, despite the cold winter across much of the United States.
The euro added half a cent after the European Central Bank left interest rates unchanged.
The yen extended its losses against the dollar and euro as concerns over the standoff between Russia and Ukraine eased somewhat.
The dollar, ruble and euro rose against the yen on Tuesday, helped by signs Russia may want to avoid more military action in Ukraine.
Callum Henderson, Global Head of FX Research at Standard Chartered, says the Swiss franc, Japanese yen and the Singapore dollar have seen safe-haven buying amid brewing tensions in Ukraine.
Ukraine tension shakes investors, who head for the greenback on strong US spending data.
The dollar fell to a two-month low against the euro after data showed euro zone inflation unexpectedly held steady this month.
Fears over a Russian intervention in Ukraine and a Chinese slowdown sent traders to the Swiss franc and Japanese yen.
Putin's war games in Ukraine and a government report showing new housing sales at five-year highs both boosted the greenback on Wednesday.