Stock indices closed mixed as oil prices dropped. Oil prices fell on the results of the Organization of Petroleum-Exporting Countries' (OPEC) meeting. The meeting ended without any agreement to cut oil output on Friday. OPEC President Emmanuel Ibe Kachikwu, Nigeria's Minister of State for Petroleum Resources, said on Friday that the OPEC decided to keep its output limit unchanged and to monitor closely market developments in the coming months.

Meanwhile, the economic data from Eurozone was positive. Market research group Sentix released its investor confidence index for the Eurozone on Monday. The index climbed to 15.7 in December from 15.1 in November.

A reading above 0.0 indicates optimism, below indicates pessimism.

"The Eurozone outperforms other world regions as the effects of ECB's policy measures kick in. The remaining world regions depict signs of a slowdown. Japan slides back into recession. In contrast to Fed's interpretations of the state of the economy, the sentix indicator for the US economy highlights a contrary view amid the preparations for the first rate rise," Sentix said in its statement.

German investor confidence index increased to 22.7 in December from 20.1 in November.

Destatis released its industrial production data for Germany on Wednesday. German industrial production increased 0.2% in October, missing expectations for a 0.7% gain, after a 1.1% fall in September.

The output of capital goods increased 2.7% in October, energy output slid 5.9%, and the production in the construction sector was up 0.7%, while the production of intermediate goods dropped 1.1%.

The output of consumer goods decreased 0.1%.

German industrial production excluding energy and construction rose by 0.7% in October.

Indexes on the close:

Name Price Change Change %

FTSE 100 6,223.52 -14.77 -0.24 %

DAX 10,886.09 +133.99 +1.25 %

CAC 40 4,756.41 +41.62 +0.88 %