Here are some of the biggest movers:
Not even an 18% plunge for Macy's can derail this market rebound.
Stocks closed near their highs of the day, erasing a 176-point slump on the Dow that was driven by concerns about bleak retail earnings and China’s economy.
Macy’s plummeted 18% on weak holiday sales and dimmed guidance. Kohl’s, JCPenney and L Brands all fell sharply as well.
US oil prices climbed to $52.59 a barrel, advancing for the ninth day in a row. That hasn’t happened since January 2010.
Twitch, the live video service that lets people watch video game players, is owned by Amazon. A video game service could be a nice fit.
Amazon has a huge amount of licensed and original content that's available to Prime members. The Freedive collection is significantly limited, but it's available for free to anyone, whether or not they have a Prime membership.
The oil market is really earning its boom-to-bust reputation lately.
But thanks to Thursday's steady gain, oil is now up 24% since falling to $42.53 a barrel on Christmas Eve.
At least oil traders can't complain they're bored.
It's unclear what Starboard's intent is and how much it has invested in the casino chain. MGM Resorts owns 28 resorts around the world.
Powell didn't really say anything that he hadn't said previously about the justification for last year's rate hikes, and he didn't give any major hints about the Fed's plans for the future. He reiterated that the Fed does not take political factors into consideration when deciding what to do with rates.
"We're very flexible in adapting our policy if the economy moves, as it often does, in ways we don't expect," he said.
“I don’t see anything that suggests the possibility of a recession in the near term is at all elevated,” he said.
Why? Powell said recent recessions have been caused by the Fed having to “hit the brakes” to combat high inflation or “asset bubbles.” Right now, the Fed doesn’t see evidence of either.
“I don’t see a recession,” Powell said.
However, the Fed chief is less bullish on the world economy. “The US economy is solid. There is good momentum going into this year. The principal worry is global growth,” he said.
Asked what qualifies for "normal," Powell said "I don't know the exact level."He noted that the balance sheet has declined to about $4 trillion, but that before the 2008 crisis it was below $1 trillion.
"It will be substantially smaller than it is now," Powell said.
Stocks turned negative after the comments, with the Dow recently down about 35 points.
“If we have an extended shutdown, I do think that would show up in the data pretty clearly,” Powell said.
But he noted that the economic data would also be muddied because the shutdown is impacting the Commerce Department, which operates the Bureau of Economic Analysis and the Census Bureau. Reports like retail sales and GDP could be sidelined.
“We would have a less clear picture into the economy if it were to go on much longer,” Powell said.
"We do not take political factors into consideration in our discussions or decisions at all."
Powell seemed open to, though not enthusiastic, about a potential meeting with Trump.
"I’m not aware of any Fed chair turning down an invitation from the White House, nor do I think that would be appropriate," Powell said.
But when Rubenstein asked if he'd be happy to accept an invitation, Powell simply repeated: "I'm not aware of anyone not accepting it."
"Financial markets are expressing a view of concern about downside risks associated with global growth and with trade," Powell said.
Asked if the Fed still plans two rate hikes, Powell emphasized there is not on a set course.
"We're in a place where we can be patient and flexible," he said. "We're waiting and watching."
Which Powell will show up on Thursday? Stay tuned for live updates.