The news just continues to get worse for Blackberry. Shareholder Marvin Pearlstein filed this lawsuit in Manhattan federal court:

Pearlstein is seeking to represent a class of “thousands” of shareholders who bought stock between September 27, 2012, when the company touted its strong financial position, and September 20 of this year, when it revealed it would have to write down between $930 million and $960 million related to unsold BlackBerry 10 devices, according to the lawsuit.