"The year ends on a mediocre fashion but policy is about to change," Peter Boockvar, chief market analyst at The Lindsey Group, said in a note. "Positively on the fiscal side and a drag on the monetary side (so we can consider Q4 data old news but it does set the stage and baseline for 2017)."
Other economic data reported Friday included durable goods orders, which fell 0.4 percent in December, and consumer sentiment for January, which hit 98.5, above an estimate of 98.1.
"The GDP confirms what we already knew. The U.S. economy is stuck in this growth range," said Michael Arone, chief investment strategist at State Street Global Advisors. The market "is looking forward to fiscal policy boosting this economy."
Equities have rallied sharply since President Donald Trump's election victory on Nov. 8, as the prospects of higher fiscal spending, corporate tax cuts and deregulation grew.
"Many of these proposals are market friendly. We don't dismiss that," said Stephen Wood, chief market strategist at Russell Investments. He added, however, the market has already priced in many of these measures becoming law, leaving the market vulnerable to a downside surprise.
Trump, who was sworn in last week, has signed a series of executive orders on matters ranging from immigration to infrastructure spending. The president met with UK Prime Minister Theresa May. In a news conference following the meeting, May said Ukraine-related sanctions on Russia should remain, while Trump said it is too early to tell.
Ahead of the meeting, Naeem Aslam, chief market analyst at Think Markets, said the meeting was "very important for both individuals because they are labeled as anti-free trade and driving the engine of populism and protectionism."
The U.S. dollar traded about 0.2 percent higher against a basket of currencies, with the euro holding near $1.069 and the yen around 115.1. However, the greenback, one of the biggest winners since the election, has eased more than 1.5 percent this month, as investors look for more clarity on the new administration's policies.
"The long dollar trade from the end of last year has been a bit of a wash [recently], said Peter Ng, senior FX trader at Silicon Valley Bank. A lot of people "are still on the sidelines."
In corporate news, earnings season continued, with Colgate-Palmolive, American Airlines Group, AbbVie and General Dynamics all reporting before the bell. Tech giants Alphabet, Microsoft and Intel all reported after the close on Thursday.
Overseas, European equities fell, with the pan-European Stoxx 600 index dropping 0.3 percent, as a global stocks rally paused. Stocks in Europe have lagged their U.S. counterparts over the past year. However, State Street's Arone said they may be ripe for a surprise to the upside this year. " Investors are wary of taking positions in Europe, but the underlying [data] is improving," he said.