I'm not sure where you're getting the 99% correlation from (source?) but the USDX is weighted as follows: EUR 57.6% JPY 13.6% GBP 11.9% CAD 9.1% SEK 4.2% CHF 3.6% So yes, there would be some degree of correlation as USD/CHF is a component of USDX... but 99%? I'm doubtful.
This website shows the correlation as -1 http://dailyfx.com/index.php?option=com_content&task=view&id=4435&Itemid=39