The yen and the Swiss franc rose while the euro fell after explosions in Brussels spurred inflows into safe-haven currencies and assets.
Gold rallied after two explosions at Brussels airport killed at least 13 people and a further blast hit the Belgian capital's Metro.
Oil prices stabilized on Tuesday after earlier falling as deadly blasts in Brussels prompted a flight towards safe-haven assets.
U.S. government debt prices edged lower Monday as investors focused on comments from Federal Reserve members and fluctuations in oil prices.
U.S. stock index futures signaled a lower open on Wall Street on Wednesday as low oil prices weighed.
U.S. stocks closed slightly higher in low volume trade Monday, steadying after five straight weeks of gains.
European shares ended Monday lower as the oil price came off its session lows.
Asia markets were mixed Monday, with some analysts predicting a quiet week, in the absence of major economic data from the U.S. and China.
Sterling was the biggest mover on Monday, sinking more than half a percent on concerns a split in the ruling Conservative Party over Europe.
Gold fell on Monday, extending losses for a third day as the dollar strengthened.
Oil prices rose on Monday as data showed a drawdown at the Cushing, Oklahoma delivery hub for U.S. crude
U.S. stocks closed higher Friday, extending the rally that followed the Federal Reserve's accommodative policy decision earlier in the week.
U.S. government debt prices were higher on Friday morning after consumerdata and of key speeches from Federal Reserve officials.
U.S. stock index futures indicated a lower open on Tuesday as traders worried about explosions in Belgium, killing more than two dozen people at the airport and metro system.
European equities closed mostly higher on Friday, as investors digested individual stock news and shook off fluctuating oil price.
Asian markets traded mostly higher Friday, after oil prices hit their highest levels for this year. But a stronger yen weighed Japan's shares.
The dollar recovered from a five-month low, as traders covered short positions after two straight days of selling.
U.S. stock index futures indicated a slightly lower open on Monday, after five straight weeks of gains, as investors focused on the price of oil and monitored comments by Federal Reserve members.
Gold edged down, as the dollar steadied from a five-month low, but it remained on track to end the week on a firmer note.
Crude prices slipped on Friday after the U.S oil rig count rose the first time since December.