Benzinga's Top Downgrades - Adaptive Biotechnologies (NASDAQ:ADPT), BP (NYSE:BP)

Analysts at Mizuho downgraded WebMD Health Corp. WBMD from Buy to Neutral. WebMD Health shares fell 3.91 percent to $47.97 in pre-market trading.
JP Morgan downgraded Plantronics Inc PLT from Overweight to Neutral. Plantronics shares fell 7.25 percent to $47.20 in pre-market trading.
Baird downgraded Cerner Corporation CERN from Outperform to Neutral. Cerner shares closed at $57.34 on Tuesday.
BMO Capital downgraded Pfizer Inc. PFE from Outperform to Market Perform. Pfizer shares closed at $31.07 on Tuesday.
UBS downgraded Calpine Corporation CPN from Buy to Neutral. Calpine shares closed at $11.80 on Tuesday.
Analysts at Deutsche Bank downgraded Frontier Communications Corp FTR from Buy to Hold. Frontier Communications shares closed at $3.93 on Tuesday.
William Blair downgraded Tableau Software Inc DATA from Outperform to Market Perform. Tableau Software shares closed at $49.51 on Tuesday.
Bank of America downgraded Adeptus Health Inc ADPT from Buy to Underperform. Adeptus Health shares closed at $26.87 on Tuesday.
Analysts at Societe Generale downgraded BP plc (ADR) BP from Buy to Hold. BP shares closed at $34.11.on Tuesday.
Analysts at Argus Research downgraded Brocade Communications Systems, Inc. BRCD from Buy to Hold. Brocade shares closed at $11.24 on Tuesday.