By Ryan Vlastelica
NEW YORK (Reuters) - U.S. stock index futures edged slightly higher on Thursday as investors continued to digest the latest out of the crisis in Ukraine and as they looked ahead to data on U.S. fourth-quarter economic growth.
* Equities have been volatile this week, driven by any sign of easing or increasing tension in the biggest conflict between Russia and the United States since the Cold War. While the market was supported by several economic indicators that pointed to improving conditions, investors used the uncertainty as an opportunity to take profits in some of the market's biggest outperformers, especially in the technology and biotech sectors.
* On Wednesday, the U.S. and the European Union agreed to work together to prepare possible tougher economic sanctions in response to Russia's annexation of Ukraine's Crimea territory, including on the energy sector. While Western leaders earlier agreed to hold off on new sanctions unless Moscow takes further destabilizing actions in the region, investors are concerned about the potential fallout to prolonged conflict.
* Citigroup Inc
* Four other banks also had their plans rejected, including Zions Bancorp
* Investors are looking ahead to a final read on gross domestic product, which is seen showing a 2.7 percent expansion in the fourth quarter, up from the previous read of 2.4 percent. The GDP data is due at 8:30 a.m. (1230 GMT), as are weekly jobless claims, which are expected to have risen by 5,000 to 325,000 in the latest week.
* At 10 a.m., pending home sales data will be released. Sales are seen as having held steady in February.
* S&P 500 futures rose 4.8 points and were above fair value, a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract. Dow Jones industrial average futures added 6 points and Nasdaq 100 futures rose 7.25 points.
* In Ukraine, the country won a $27-billion international financial lifeline from the International Monetary Fund, rushed through in the wake of Russia's annexation of Crimea, as Moscow's economy minister spoke of the cost of military action in its former Soviet neighbors. The credit is in return for tough economic reforms that will unlock further aid from the European Union, the United States and other lenders over two years.
* In company news, Bank of America
* Yum Brands Inc
* Cloud-based payroll processor TriNet Group Inc
* The stock will begin trading on Thursday, a day after King Digital Entertainment Plc
(Editing by Chizu Nomiyama)