The dollar fell to a two-month low against the euro after data showed euro zone inflation unexpectedly held steady this month.
Gold settled lower on Friday, but logged a monthly gain as persistent concerns about a slowdown in the U.S. economy hurt the dollar.
Asian equities were a mixed sight of red and green on Friday, despite overnight gains on Wall Street and as investors digested a raft of Japanese economic data.
Ukraine tension shakes investors, who head for the greenback on strong US spending data.
Stocks rose Thursday, with the S&P 500 ending at a record high.
U.S. stock index futures pointed to a lower open on Friday, ahead of the official second estimate of fourth quarter 2013 economic growth.
Treasurys held on to earlier gains following strong demand for a sale of seven-year notes, helped by safe-haven demand.
European stocks closed lower on Thursday following heightened tensions in Ukraine.
Putin's war games in Ukraine and a government report showing new housing sales at five-year highs both boosted the greenback on Wednesday.
Oil fell on Thursday, pressured by volatility in Ukraine that curbed risk appetite.
Asian equity markets opened lower on Thursday, after a choppy session on Wall Street overnight.
Stocks eked out small gains in volatile trading Wednesday, with the Nasdaq briefly hitting a 14-year high.
U.S. stock index futures signaled a lower start to Wall Street trade on Thursday, ahead of monthly durable goods data.
U.S. stock index futures pushed higher on Wednesday ahead of more housing data and several quarterly fourth quarter earnings updates.
U.S. bonds edged higher after the Treasury Department auctioned $35 billion in five-year notes at a high yield of 1.530 percent.
The dollar fell against a basket of major currencies after soft U.S. consumer confidence data drove bond yields lower.
European stocks closed lower on Wednesday, with concerns over China's economy and a fall in Credit Suisse shares driving declines.
U.S. crude rallied after data showed the fourth consecutive weekly drop in inventories at the Cushing, Oklahoma delivery hub.
Bullion rose to its highest in four months on Wednesday as weak U.S. economic data burnished its safe-haven appeal.
Fears over a Russian intervention in Ukraine and a Chinese slowdown sent traders to the Swiss franc and Japanese yen.
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