Recent losses in Treasuries, which crescendoed Thursday into one of the worst days since Donald Trump was elected president, look like a buying opportunity for many investors who have a grim view of the economy's prospects.

And it appears some are pouncing, with traders cashing out bearish wagers and buy-the-dip buyers rushing in. The rekindled interest in the safety of bonds nudged yields on the 10-year, which had climbed to a three-month high of 1.97 percent on Thursday, down to as low as 1.89 percent in early European trading Friday before bouncing back to around 1.94 percent. European bonds rebounded after French and Belgian yields had climbed above 0 percent Thursday.

Signs of progress in U.S.-China trade talks have thrashed bonds for days, and the two countries agreed Thursday to roll back tariffs on each other's goods if a deal is reached. The Treasury market has seen a huge turnaround since August, when fears that global growth is slowing prompted the biggest monthly rally since 2008.