Taken together, it was enough to reassure investors that authorities won't rush to raise rates even if inflation accelerates.
Risk-sensitive currencies rose, pushing the kiwi, Aussie and sterling to their highest levels since early 2018, while the safe-haven Japanese yen slipped.
MSCI's broadest index of Asia-Pacific shares outside Japan, which has drifted 1.2% lower over the week as rising yields pressured valuations, rose 0.3% and S&P 500 futures rose 0.1%.
Tech stock selling pushed Japan's Nikkei 0.4% lower. .T
Benchmark 10-year U.S. Treasury yields, which fall when prices rise, were steady at 1.3480% after closing 2.4 basis points lower following Powell's testimony to Congress.
Powell did not seem too fussed about the selloff that has driven the 10-year yield up by 40 basis points this year, telling lawmakers it was a statement on the market's confidence in the pandemic recovery.
But he cautioned that was a ways off and said markets would get plenty of warning about any future policy adjustments.
His comments reversed a morning sell off on Wall Street, and the S&P 500 closed 0.1% higher, although the Nasdaq, which is full of growth stocks more sensitive to higher yields, finished Tuesday down 0.5%.
"The overall takeaway from Powell is that over the next couple of months he will just keep singing the same dovish commitment song," said Edward Moya, senior market analyst at OANDA in New York.
"Until we see more than half of the 10 million jobs come back, Powell won't change his tune."
Elsewhere commodity prices eased a little after hefty gains in recent days and benchmark Brent crude oil futures LCOc1 fell 0.5% to $65.01 a barrel. U.S. crude futures traded 0.8% lower at $61.19 a barrel.
In currency markets, the Australian dollar hit a three-year high of $0.7945 and the New Zealand dollar made the same milestone, reaching $0.7378.
Sterling, which has been boosted by Britain's vaccine rollout, briefly leapt as high as $1.4295, its best since April 2018.
Cryptocurrency bitcoin nursed losses at $49,700 after a two-day selloff.
(Reporting by Tom Westbrook in Singapore and Echo Wang in Miami; Editing by Lincoln Feast.) ((firstname.lastname@example.org; +65 6318 4876;))
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