Benzinga's Top Upgrades (MR, SKS, CPN, ROSE)

Oppenheimer upgraded Mindray Medical International Ltd MR from “perform” to “outperform.” MR's shares closed at $27.54 yesterday. Mindray Medical's PEG ratio is 0.88. Analysts at Goldman Sachs upgraded Saks Inc SKS from “sell” to “neutral.” SKS' shares closed at $11.32 yesterday. Saks' trailing-twelve-month revenue is $2.79 billion. Dahlman Rose upgraded Calpine Corporation CPN from “hold” to “buy.” CPN's shares closed at $16.39 yesterday. Calpine's trailing-twelve-month revenue is $6.53 billion. Wunderlich upgraded Rosetta Resources Inc ROSE from “hold” to “buy.” ROSE's shares closed at $49.48 yesterday. Rosetta Resources' PEG ratio is 0.76. More Analyst Ratings here