The Swiss Economic Institute KOF released its leading indicator for Switzerland on Tuesday. The KOF leading indicator dropped to 89.7 in June from 92.7 in May, missing expectations for a rise to 93.6. May's figure was revised down from 93.1.

It was the lowest level since December 2011.

The decline was driven by a negative sentiment in all industrial sub-categories.

"The perspectives for the Swiss economy, according to the Barometer, have become more negative for the coming months," the KOF said.