Stock indices traded mixed as oil prices turned negative in the second half of the day. Earlier, oil prices increased as the output in Canada dropped due to the wildfire.

Market participants also eyed the economic data from the Eurozone. Market research group Sentix released its investor confidence index for the Eurozone on Monday. The index rose to 6.2 in May from 5.7 in April.

A reading above 0.0 indicates optimism, below indicates pessimism.

"Economic expectations for the Eurozone remain resilient as investors perception about the future development of Japan continues to deteriorate," Sentix said in its statement.

"Moreover, in May investors get wary about the situation of the US economy. Emerging markets proceed their recovery," Sentix added.

Destatis released its factory orders data for Germany on Monday. German seasonal adjusted factory orders jumped 1.9% in March, exceeding expectations for a 0.7% increase, after a 0.8% fall in February. February's figure was revised up from a 1.2% drop.

The rise was driven by an increase in foreign orders. Foreign orders increased by 4.3% in March, while domestic orders declined by 1.2%.

Indexes on the close:

Name Price Change Change %

FTSE 100 6,114.81 -10.89 -0.18 %

DAX 9,980.49 +110.54 +1.12 %

CAC 40 4,322.81 +21.57 +0.50 %