Benzinga's Top Upgrades

Analysts at Citigroup upgraded Aviva plc AV from “neutral” to “buy.” Aviva's stock closed at $12.04 yesterday. Aviva had $40.59 billion in total cash for the latest quarter. Goldman Sachs upgraded Mindray Medical International MR from “neutral” to “buy.” Mindray Medical's shares closed at $33.72 yesterday. Mindray Medical's trailing-twelve-month operating margin is 17.81%. Analysts at Bernstein upgraded Dendreon DNDN from “market perform” to “outperform.” Dendreon's shares closed at $5.10 yesterday. Dendreon's trailing-twelve-month revenue is $442.18 million. RBC Capital upgraded CenterPoint Energy CNP from “sector perform” to “outperform.” CenterPoint Energy's shares closed at $19.79 yesterday. CenterPoint Energy's PEG ratio is 2.96.