Stock futures little changed ahead of third-quarter GDP data

U.S. stock index futures were little changed on Tuesday, ahead of third-quarter GDP data, even as crude oil prices edged up from multi-year lows.

Traders work on the floor of the New York Stock Exchange (NYSE) in New York December 17, 2015.

* Brent crude looked set to make the first daily gains in five sessions as investors closed bearish positions ahead of Friday's Christmas holiday, but global oversupply concerns limited gains.

* Global stocks rose on Tuesday, lifted by the recovery in oil prices. U.S. stocks closed higher on Monday, helped by rallies in tech and hospital stocks.

* Trading volumes are expected to be relatively light this week, likely exacerbating volatility, with U.S. stock markets operating a shortened session on Thursday and closing on Friday for Christmas.

* The U.S. Commerce Department is expected to trim third-quarter GDP growth to an annual rate of 1.9 percent from 2.1 percent reported last month. The data is due at 8:30 a.m. ET (1330 GMT)

* U.S. existing home sales for November is expected to have remained steady, after falling 3.4 percent in October. The report is scheduled for release at 10:00 a.m.

* ConAgra Foods posts quarterly results before the bell, while Nike will report after the market closes.

* Dow component Nike's shares were up half a percent at $130.50 in premarket trading.