There is PPI data at 8:30 a.m. ET and consumer sentiment at 9:55 a.m. but the markets will stay laser focused on Ukraine, ahead of the weekend.
Also in the background is concern about China, which reported weak retail sales and industrial production data Thursday. There were also reports Thursday that lending to some Chinese businesses would be cut by 20 percent.
"I think it's reasonable to have concerns about China," said Robert Sinche, global currency strategist at Pierpont Securities. "A year ago, people were thinking there was risk it could slow down to 7.5 percent (growth). Now the view is 'I hope they can make 7.5 percent.' I think that's a meaningful switch."
(Read more: Art Cashin: Next few days are 'absolutely critical')
China has been trying to curb excess in its shadow banking system and cool lending. But there is concern the slowing economy could spill over to the rest of the world.
Barry Knapp, head of equity portfolio strategy at Barclays, said he's concerned the slowdown in China could impact the earnings of U.S. industrial companies, and slow down the stock market's gains. As for Europe, he said a slower China could have an even bigger impact.
"I think we're at the start of a credit situation and the great lesson is you don't work out credit situations in a quarter," said Knapp.
(Read more: China hit by economic smog)
Worries about China picked up last week after the first ever default by a corporate borrower raised concerns that others could also default.
"They moved their currency down, and I think they have no intention of letting the appreciation start again," said Sinche, adding the currency has fallen 1.5 percent from mid-January. "I think we're going to go for a year without letting the currency appreciate to really try to assess what's going on and to make sure the economy is making the transition."
There are several earnings Friday, including Ann, The Buckle and Intercept Pharma.
