UPDATE (11:16 a.m.)
U.S. markets have rebounded from earlier lows, now just marginally lower.
The Dow is off 30 points, or 0.2 per cent, to 12,747.
The tech-heavy Nasdaq and S&P 500 are both less than 1 point lower, both closing in on positive territory.
Treasuries are rallying following this morning’s early retreat, with the U.S. five-year hitting a record low of 0.581 per cent.
Below, a look at yields on the five-year over the past 12 months.