Treasury prices and prices of government bond yields across the globe fell on Monday as risk assets rallied on waning Brexit fears.The benchmark 10-year treasury yield rose more than five basis points to 1.67%; highest since June 9. Yield had closed at 1.61% on Friday, thus making Monday’s jump as the largest single day rise since May 18. The two-year yield, which mimics short-term rate hike bets, also jumped to 0.733%; it’s highest since June 10.Across the pond, German 10-year bund yield added 4 points and rose to -0.06%. The sell-off in safe haven Treasuries and German bund prices was triggered by weekend polls released in the UK which showed a shift in sentiment away from Brexit.The 10-year Treasury yield currently trades around 1.665%. The focus today is on Yellen testimony, which starts later today. Brexit related news flow could affect demand for treasuries as well.