The EUR/CHF currency pair, which expresses the value of the euro in terms of the Swiss franc, has historically been viewed as a risk-on currency pair within the European region. When the euro rises against the Swiss franc, risk sentiment is thought to be improving, while a weaker EUR/CHF tends to signal bearish sentiment in Europe (including European equity markets, for example).
This is because the Swiss franc is viewed as a safe haven, whereas the euro is viewed as being riskier. Both currencies (EUR and CHF) are managed by central banks with negative short-term