Futures snapshot at 7:07 a.m. ET:

* Oil prices traded higher, supported by a strong gasoline market, but rising output from OPEC producers revived concerns about a fuel supply overhang.

* Shares of IBM (IBM.N) fell 3.2 percent in premarket trading after the company's quarterly revenue came in below expectations. 

* United Continental Holdings (UAL.N) was down 2.5 percent, a day after the airline's quarterly results beat expectation but said costs rose. 

* Morgan Stanley (MS.N) rose 0.8 percent after the bank's quarterly profit rose 11.4 percent.

* Vertex Pharmaceuticals (VRTX.O) jumped 27.3 percent after the company reported positive results for its cystic fibrosis triple combination treatment. 

* Discovery Communications (DISCA.O) was up 5.6 percent after a source told Reuters that the company and Scripps Networks Interactive (SNI.O) are in merger talks. Scripps was up 14.1 percent.

* Dow e-minis 1YMc1 were down 12 points, or 0.06 percent, with 11,948 contracts changing hands. 

* S&P 500 e-minis ESc1 were up 1.25 points, or 0.05 percent, with 78,754 contracts traded. 

* Nasdaq 100 e-minis NQc1 were up 14.25 points, or 0.24 percent, on volume of 19,695 contracts.