The Swiss Federal Customs Administration released its trade data on Tuesday. The Swiss trade surplus fell to CHF2.54 billion in December from CHF3.16 billion in the previous month. October's figure was revised up from a surplus of CHF3.14 billion.

Exports dropped 1.q% year-on-year in December, while imports were down 6.3% year-on-year.

In 2015 as whole, the Swiss foreign trade surplus climbed to CHF36.61 billion from CHF29.75 billion in 2014.

Exports dropped 0.7% in 2015, while imports declined 0.5%.

Low exports were driven by a drop in machine industry, accounting for two fifths of total decline.

Exports to the U.S. and China rose, while exports to the Eurozone declined.