Based largely on the poor outlook for the PS3/gaming division for FY2007? LINK Microsoft took a hit based on the 360 shortages, etc. but no one downgraded the stock AFAIK. Wow.
Yea, that is a big jump from a buy rating, all the way to sell. Normally they wander in some neutral rating for a while or even underweight. But this being said this is just one research firm making this analysis. There are more analyst firms out there who still have decent ratings on the Sony. This being said, the ratings cut by S&P research, has had no negative term impact on price. In fact the price has gone up in the past few days since this report came out. Lastly, if I have learned anything with the market over all these years, is that most analysts or firms included have some vested interest in which way a stock is rated.