The national flag of Switzerland flies above the entrance to a Credit Suisse Group AG bank branch in Bern, Switzerland, on Tuesday, May 20, 2014. Credit Suisse, Switzerland's second-biggest bank, rose the most in six months in Zurich trading after it agreed to pay $2.6 billion to end a three-year U.S. tax probe. Photographer: Philipp Schmidli/Bloomberg via Getty Images