The dollar tumbled on as sterling surged more than 2 percent and the euro jumped after opinion polls swung in favor of remain.
Gold fell on Monday after polls showed the campaign for Britain to remain in the European Union regaining some momentum.
Oil rose, lifted by a wave of investor confidence and a weaker dollar after polls showed a smaller chance of Britain voting to leave the EU.
U.S. futures were indicating another positive start for major Wall Street indexes Tuesday as Brexit fears faded amid fresh polls.
U.S. stock index futures indicated a higher open Monday as global markets rallied on Brexit polls that showed the remain camp making gains.
U.S. stocks closed lower Friday, with health care and tech stocks lagging, amid continued uncertainty ahead of next week's scheduled Brexit vote.
U.S. government debt prices were mixed as investors digested better-than-expected housing data.
European markets opened higher on Friday, on the back of a positive trading session in Asia and a tick-up in oil prices.
Asia's markets closed higher on the final day of a volatile week amid easing concerns that the U.K. would vote to exit the EU in its June 23 referendum.
Sterling rose as traders evaluated whether the killing of MP Jo Cox may alter the balance of opinion on Brexit.
Gold rose more than 1 percent on Friday, supported by a softer dollar and cautious interest rate comments.
U.S. oil prices rose on Friday for the first time in a week as the dollar fell and investors cautiously bought some riskier assets.
U.S. stocks closed higher Thursday, ending a five-day losing streak with telecoms leading sector advancers.
U.S. sovereign bond prices were trading higher Thursday after the Federal Reserve stood pat on interest rates.
European stocks closed lower as markets digested the latest monetary policy decisions from the U.S. Federal Reserve and Bank of Japan (BOJ) and remained on edge over the Brexit referendum.
The Japanese yen surged and the Nikkei tumbled on Thursday after the Bank of Japan kept monetary policy steady as was widely expected.
Sterling rallied from a two-month low against the euro, extending gains after British police said British lawmaker Jo Cox died.
Gold pared gains after it rallied to a two-year peak as the Fed sounded a less dovish note after its latest policy meeting.
U.S. oil prices slumped more than 2 percent to close at a five-week low on Thursday.
U.S. stock index futures indicated a lower open on Friday morning.