Sentix's index for the euro zone rose to -21.0 points for December from -30.9 in November, surpassing expectations of analysts for a reading of -27.6.

"The surprisingly high gas levels and the continued stable labour markets are not consistent with a recession," Sentix Managing Director Manfred Huebner said in a statement.

An expectations index rose to -22.0 from -32.3 in November, hitting its highest level since March this year.

An index on the current situation in the euro zone also rose, to -20.0 from -29.5.

"In our opinion, however, this correction in assessments should not be misinterpreted as a general trend reversal," Huebner said. "The dangers of recession have by no means been averted."

The poll of 1,268 investors was conducted between Dec. 1 and Dec. 3, Sentix said.

(Writing by Paul Carrel; Editing by Maria Sheahan)