Meanwhile, the yield on the German 10-year bund fell below zero for the first time ever, as fears of a potential British exit from the European Union sent investors towards safe haven assets.
The Federal Reserve's FOMC is gathering for its first session of a two-day meeting ahead of its June rate decision. Rate rise expectations have dwindled significantly in recent weeks after non-farm payrolls data showed worse-than expected jobs growth in May.
Investors, meanwhile, digested May retail sales, which showed a 0.5 percent rise, above the expected increase of 0.3 percent.
Excluding automobiles, gasoline, building materials and food services, retail sales rose a solid 0.4 percent last month after an upwardly revised 1.0 percent increase in April.
Also, import prices posted their largest gain in more than four years amid rising oil prices.
Business inventories data for April showed a 0.1 percent increase, with consensus estimates at 0.3 percent.
— Reuters contributed to this report.