The dollar lost 2.5 percent against the yen since last Friday, on guidance that the Federal Reserve will not soon raise base interest rates.
Asian stocks took a hit on Friday after losses on Wall Street overshadowed benign Chinese data.
U.S. stocks fell Thursday, with Wall Street pausing after a two-session win streak.
U.S. stock index futures were mostly lower Friday, following the release of JPMorgan Chase earnings.
Bonds traded higher on Thursday after the U.S. government's auction of 30-year Treasury bonds, the last of three debt auctions this week.
European shares closed lower on Thursday, having fluctuated for much of the day.
Crude prices slipped on both sides of the Atlantic, hit by weak Chinese data as well as the prospect of a rebound in Libya's oil exports.
The dollar hit a three-week low on Thursday after minutes from the Federal Reserve's March meeting disappointed dollar bulls.
Asian stocks ended higher on Thursday, with mainland shares outperforming, as investors shrugged off disappointing Chinese trade figures.
U.S. stock index futures signaled a lower open on Thursday, with shares in Asia and Europe boosted after dovish minutes from the latest Fed meeting.
U.S. stocks rose on Wednesday after Alcoa's quarterly profit topped expectations.
U.S. bonds pared some losses on Wednesday after the U.S. Federal Reserve released the minutes of its latest policy meeting.
European shares closed higher on Wednesday, following a rebound led by the auto sector, after the heavy selling seen at the start of the week.
U.S. crude oil rose ahead of weekly inventory reports expected to show gasoline stocks fell, while Brent gained on new unrest in Ukraine.
Crude rallied on Tuesday, amid escalating tensions in Ukraine and Fed minutes that traders liked.
Japan's benchmark index extended losses on Wednesday but the rest of Asian shares rose following a recovery on Wall Street overnight.
U.S. stocks climbed on Tuesday as Wall Street looked to first-quarter earnings.
U.S. stock index futures pointed to a higher open on Wall Street on Wednesday, after better-than-expected results from Alcoa.
Treasurys were modestly higher after the US government's auction of 3-year Treasury notes, the first of three debt auctions this week.
European stocks closed lower on Tuesday for a second day running.
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