A SEC investigation goes formal after 60 days automatically. When a investigation is over the SEC is required to issue a statement to that affect. If they issue no statement the investigation is presumed to be active but they are not required to move forward on it till they deem it advisable.
It's seems that the scandals in D.C. involving Congressional pundits where the buying and selling of stocks based on insider information could be causing a haymow. This might be causing delays in the investigation of certain stocks as perks were given to some in the form of stock information.
As reported on by the news medias.
caveat emptor, quia ignorare non debuit quod jus alienum emit.
( let the purchaser beware, for he ought not to be ignorant of the nature of the property which he is buying from another party .)