In contrast, the Federal Reserve on Wednesday said it was too early to consider rolling back emergency support for the economy, pressuring the US dollar.
Oil, one of Canada's major exports, settled 1.5% higher at $63.86 a barrel after US distillate inventories posted a large drawdown and refiners ramped up activity to the highest in over a year.
Powell has frequently noted that it took a decade after the 2008 global financial crisis for the US economy to return to full employment, while inflation consistently fell short of its target.
The benchmark 10-year yield was up 4.1 basis points at 1.6135%, continuing its increase from multiweek lows reached April 15.
Investors were watching to gauge the market's appetite for $24 billion of 20-year bonds scheduled to be auctioned on Wednesday, said Justin Lederer, Cantor Fitzgerald Treasury analyst.
The second-largest US bank by assets unlocked $2.7 billion from its reserves and unveiled a $25 billion stock repurchase plan, betting on a swift economic recovery driven by rapid vaccinations.
Consumer banking revenue at the bank, however, fell 12% to $8.1 billion in the quarter ended March. Net interest income, a key measure of how much the bank can make from lending, fell 16% to $10.2 billion in the quarter.