iamgroot

What caused the spike on USD/CHF last Sept 4, 2014?

FX:USDCHF   U.S. Dollar/Swiss Franc
24 0 0
I just wanted to know what caused this major spike. Couldn't find anything on the calendar foro this.

Calendar for this day is here:
http://i.imgur.com/m8sVt5L.png?1
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