Dendreon Co. (DNDN), Rose Rock Midstream (RRMS), Exelixis, Inc. (EXEL), Progress Energy (PGN), NuVasive (NUVA), OM Group Inc (OMG) and P.F. Chang's China Bistro (PFCB) had ratings and price targets on them adjusted by analysts.
Robert W. Baird upgraded Rose Rock Midstream (RRMS) to an "Outperform" rating.
Stifel Nicolaus initiated coverage on Dendreon Co. (DNDN). They placed a "Hold" rating on the company.
Stifel Nicolaus initiated coverage on Exelixis, Inc. (EXEL). They placed a "Buy" rating and a price target of $8.00 on the company.
Dahlman Rose initiated coverage on Progress Energy (PGN). They placed a "Hold" rating on the company.
JMP Securities upgraded NuVasive (NUVA) from a "Market Perform" rating to a "Outperform" rating.
First Analysis upgraded OM Group Inc (OMG) from a "Equal Weight" rating to a "Overweight" rating.
Argus upgraded P.F. Chang's China Bistro (PFCB) from a "Sell" rating to a "Hold" rating.
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