Silicon Graphics (SGI) down on upgrade

Silicon Graphics International Corp (NASDAQ: SGI) stock gave back 2.2% to $12.69, after Sterne Agee upgraded shares of SGI from a neutral rating to a buy rating in a research note issued to investors on Jan. 25. The firm currently has $19.00 target price on the stock. Share volume was 80,000, compared to an all-day average of 291,000