The dollar struggled against the yen and Swiss Franc as rising tensions in Ukraine offset optimism about U.S. economic growth.
The euro rose to a two-week high against the dollar on Monday, supported by expectations inflation in the euro zone will tick up.
Soft corporate earnings weighed on Asia's major indices on Friday, with Tokyo outperforming on the back of a weaker currency.
U.S. stocks climbed Thursday as earnings from Apple and a better-than-expected durable goods number.
European shares closed higher on Thursday as Ukraine concerns returned to the market.
U.S. stock index futures signaled a lower open on the last day of the week, as fears about the Ukraine-Russia situation resurged.
Gold managed a modest gain, settling above a key technical support level, though it may be vulnerable to further losses as demand remains slack.
Gold was underpinned after Ukrainian forces killed up to five pro-Moscow rebels as they closed in on the separatists' military stronghold in the east.
Japanese shares fell 1 percent on Thursday as investors were disappointed with the lack of a Trans-Pacific Partnership deal.
European markets finished lower on Friday and ended the week flat, as the situation in Ukraine erased any optimism over earnings season.
U.S. stock index futures pushed higher on Thursday, as Apple and Facebook's strong earnings boosted early trade in Europe.
Stocks mostly fell Wednesday after earnings from Boeing and AT&T.
The Treasury Department auctioned $35 billion in five-year notes at a high yield of 1.732 percent, the rate highest since May 2011.
European shares closed lower on Wednesday as investors reacted to a slew of earnings news and data released in the euro zone.
Gold extended losses for a fourth straight day as outflows from physical gold funds pointed to weak investment appetite.
Crude gave up gains after data showed U.S. oil inventories spiked by more than 3 million barrels last week.
US stock index futures seesawed as investors awaited another wave of major earnings, including Dow-listed Boeing and Procter & Gamble.
The euro struggled to make headway on Thursday amid caution before a speech by ECB President Mario Draghi.
U.S. stocks rose on Tuesday after earnings from McDonald's and Netflix.
Asian stocks were mixed on Wednesday as investors digested data that showed a slight improvement in Chinese factory activity.
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