The euro hit an eight-month low against the dollar on Wednesday as worries drove investors away from the single currency.» Read More
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.
The dollar fell against a basket of major currencies after soft U.S. consumer confidence data drove bond yields lower.
The dollar lost its safe haven bounce as risk appetite improved amid expectations that Ukraine would receive international aid.
U.S. data this week will continue to reflect the impact of extreme weather, presenting a downside risk for the U.S. dollar.
The National Association of Realtors delivered some bad news, sending the euro back up against the dollar.
A still fragile outlook for the European economy and strong US economic growth helped push the greenback up.
The dollar was steady ahead of Janet Yellen's testimony in Congress, while Norway's crown jetted almost 1 percent higher.
Global currency markets trod water ahead of interest rate decisions in Britain and the euro zone on Thursday.
The yen gained on Wednesday, as struggles in stock markets and the emerging markets forced investors to seek safe-haven currencies.
The Singapore dollar sealed its safe haven status this week, strengthening against its peers amid a selloff in global equity markets. CNBC's Julia Wood reports.
The Australian dollar surged almost two percent on Tuesday after moves from the country's central bank dropped.
The euro was soft on Monday as investors thought it more likely the European Central Bank would have to ease policy to combat slowing inflation.