Source: http://www.joystiq.com/2014/01/27/sony- ... by-moodys/
From the article "Moody's Investors Service has cut Sony's credit rating to the first level of junk status. Yes, there are multiple levels of junk in the lexicon trunk of finance. Moody's recognizes that Sony has made progress with its multi-year restructuring, but the ratings agency has concerns the company's TV and PC businesses are a challenge to Sony's overall stability."
It looks like Sony's gaming division is doing well, but the rest of the company is having some major problems. I guess Nintendo is not the only gaming company with problems these days.