The yen and Swiss franc rose as oil prices slid and bank shares led global equity markets lower, stoking a fresh wave of bids for low-risk assets.
A broad decline in commodity and stock prices in major world markets raised the yen on Thursday.
The dollar hit a five-week trough on Wednesday, hurt by waning expectations that the Federal Reserve will raise interest rates anytime soon.
The Australian dollar strengthened on Tuesday after the Reserve Bank of Australia kept interest rates on hold.
Andrew Balls, Pimco, discusses how an exit from the European Union could impact global currencies, especially the British pound. Also Balls provides insight to a possible rate hike in July by the Federal Reserve.
The dollar hit a session low against a basket of currencies as Janet Yellen delivered prepared remarks about the U.S. economy.
CNBC's Wilfred Frost sits down with former London Mayor Boris Johnson to discuss the United Kingdom's referendum on whether to remain in the European Union.
CNBC's Wilfred Frost talks with former London Mayor Boris Johnson about how exiting the European Union would likely impact the British pound.
Boris Johnson, former London mayor and campaigner for Vote Leave, shares his view on the EU referendum and how he thinks the pound will fare.
The dollar fell to the lowest level in three weeks on Friday after the U.S. jobs report came in far below expectations.
The dollar fell to its lowest against the yen in more than two weeks.
The Brexit vote will overshadow other risks and could spur the Fed to delay a rate hike, said Axel Weber, chairman of UBS and a former central banker.
The U.S. dollar hit its lowest level in two weeks against the yen after Japan delayed a sales tax hike for longer than expected.
Investors received a reality check this week after a poll on the upcoming referendum highlighted that the vote might just be closer than many were thinking.
The dollar was mostly flat against a basket of major currencies after U.S. data failed to support expectations for a June or July Fed hike.
The dollar reached a one-month high against the yen on Monday, after Fed Chair Janet Yellen fanned expectations the Fed would raise U.S. rates soon.
The dollar index hit 2-month highs on Friday after Federal Reserve Chair Janet Yellen left the door open to a rate increase.
Ramin Nakisa, global macro strategist at UBS, says "Brexit" would have an impact on growth and the biggest effect would be on foreign exchange.
The dollar fell against the euro, yen, and franc after U.S. economic data showed weakness in business spending plans.
The U.S. dollar rose against the yen for a second straight day and hovered near its highest level in roughly 10 weeks against the euro.