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.
The STOXX 600 has also lagged a recovery in its U.S. counterpart due to a slow vaccination rollout and a new wave of coronavirus infections on the continent.