What percentage of the US dollar index basket is the the CHF worth?
A mere 3.6%.
Devalue that portion by 10% and those short the DXY are suddenly in a world of hurt.
The combination of the weak euro and the devalued franc has pushed the DXY up 0.66% today.
Next resistance for the index is at 76.26. If that breaks, the mid-July lows at 76.72 comes into play.