Japanese shares fell on Wednesday, as Asia closed mixed ahead of the upcoming British vote to decide whether to remain in the EU.
The dollar was broadly weaker on Wednesday as risk appetite returned to markets.
Gold fell to a two-week low on Wednesday after its biggest one-day drop in four weeks.
U.S. futures were indicating a higher start for stocks after two straight sessions of gains.
U.S. stocks closed mildly higher, amid declines in oil prices, as investors eyed the latest Brexit polls and digested remarks from the Fed chair.
U.S. sovereign bond prices were lower Tuesday as safe-haven trades unwound alongside polls that showed positive gains for the U.K.'s remain campaign.
European stocks were mostly higher following polls that allayed fears of a Brexit, however, a decline in oil prices added pressure to sentiment.
Japanese markets on Tuesday reversed early losses of as much as 1.13 percent to trade higher as rest of Asia close mixed.
Sterling and the euro rose on the last day before Britain's referendum on EU membership, the pound trading just off its highest this year.
Gold fell for a second session in a row on Tuesday as fears that Britain could vote to leave the European Union in Thursday's referendum receded.
Oil prices reversed their losses in post-settlement trade after API data showed a bigger-than-expected draw on inventory.
U.S. stocks closed higher Monday, amid gains in oil prices, as fears of a Brexit diminished.
European stocks surged by Monday's close, as declining fears of a Brexit vote buoyed global market sentiment, sterling and oil prices.
The Treasury Department auctioned $26 billion in two-year notes at a high yield of 0.745 percent on Monday.
Asia markets closed higher on Monday, after U.K. polls gave the remain camp a slight edge ahead of the June 23 Brexit referendum.
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.