Swiss franc
The Swiss franc is the currency and legal tender of Switzerland and Liechtenstein and also legal tender in the Italian exclave of Campione d'Italia. Although not formally legal tender in the German exclave of Büsingen am Hochrhein (the sole legal currency is the euro), it is in wide daily use there; with many prices quoted in Swiss francs. The Swiss franc is the only version of the franc still issued in Europe.
Foreign-exchange reserves
A case to point out is that of the Swiss National Bank, the central bank of Switzerland. The Swiss franc is regarded as a safe haven currency, so it usually appreciates during market's stress. In the aftermath of the 2008 crisis and during the initial stages of the Eurozone crisis, the Swiss franc (CHF) appreciated sharply. The central bank resisted appreciation by buying reserves. After accumulating reserves during 15 months until June 2010, the SNB let the currency appreciate. As a result, the loss with the devaluation of reserves just in 2010 amounted to CHF 27 Billion or 5% of GDP(part of this was compensated by the profit of almost CHF6 Billion due to the surge in the price of gold). In 2011, after the currency appreciated against the Euro from 1.5 to 1.1, the SNB announced a ceiling at the value of CHF 1.2. In the middle of 2012, reserves reached 71% of GDP.