Market research group Sentix released its investor confidence index for the Eurozone on Monday. The index fell to 18.4 in August from 18.5 in July.

A reading above 0.0 indicates optimism, below indicates pessimism.

"Despite the global headwinds, the euro zone's economy appears to be in relatively good form. The euro zone has swallowed the turmoil surrounding Greece and a further collapse in economic momentum there relatively well," Manfred Huebner from Sentix said.

The current conditions index climbed to 15.3 in August, the highest level since July 2011.

The expectations index dropped to 21.5 in August from 22.3 in July.

German investor confidence index declined slightly.