Powell said parts of too-big-to-fail regulations were "inappropriately applied to small and medium-sized" banks.
Verizon says total revenues for its wireless business fell by 5.1 percent from a year ago.
A bright spot amid steady results was Sky's announcement of a $250 million tie-up with U.S. cable network HBO to produce content until 2020.
Asian shares traded sideways on Thursday, following key earnings on Wall Street and a sharp fall in oil prices.
See which stocks are posting big moves after the bell.
Tillerson said "the Trump administration is currently conducting across the entire government a review of our Iran policy."
U.S. equities closed mostly lower on Wednesday, with IBM and oil prices pushing down the Dow Jones industrial average.
Stanley Fischer, vice chairman of the Federal Reserve, said that spillovers from tightening "will be manageable."
After the ouster of Bill O'Reilly amid allegations of sexual harassment, Tucker Carlson will take over the time slot.
Oil steadied on Wednesday after OPEC said it was committed to eroding a global supply overhang that has dogged markets since 2014.
The notorious pharma bro Shkreli denies claims he looted a drug company he founded to pay off hedge fund investors he allegedly defrauded.
Chaffetz announces on Facebook that he will not run any office in 2018 and "return to the private sector."
Fewer homebuyers jumped into the mortgage market last week even though interest rates hit their lowest levels since November.
Morgan Stanley's results are bolstered by strong performances from its trading and investment banking businesses.
But the world's largest money manager also reports quarterly revenue that fell short of expectations.
Most Asia markets declined on Wednesday, tracking Wall Street's negative close overnight, with resources and financial shares under pressure.
These are the stocks posting the largest moves after the bell.
The legacy enterprise technology company, founded over 100 years ago, has reorganized around "strategic imperatives."
Oil prices fell on news that U.S. shale oil output was expected to post the biggest monthly rise in more than two years.
Investors also remained vigilant amid U.S.-North Korea tensions and the nearing of the French presidential election.