Yes it has. Even Nader called it a "Fact Finding Investigation" which the DOJ does not do. The DOJ does not go on "fishing expeditions" as there are numerous legal protections against that.
If this was a non-issue CYDY would have followed up with an announcement all was well. They haven't. In fact they went into further detail just what was being looked into, and that it expects potential financial damages to the company resulting from the investigation.
News 
Market Data 
Discover 
