The Swiss Franc is often viewed as a safe haven currency, so when the global economy becomes uncertain or other currencies experience problems, you might expect demand for CHF to rise. Although it is less liquid than the Euro it remains a popular currency pair, especially during times of economic or political instability.
During these difficult times CHF’s reputation as a relatively safe and stable bet sees its stock rise. During less volatile times the CHF may drop back a little with its value being closely tied to movements in the Euro. If this is rising, so the theory goes, so will CHF. So, if the Euro moves against the dollar, but the Franc does not immediately follow suit you might decide buy Francs in the hope that it will move. However, as so often there are no guarantees in the world of currency trading. For example, when the Swiss Central Bank announced it would no longer be pegging the CHF to the Euro, investors were shocked prompting the value of the Swiss Franc to spike.