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Here are Friday's top research calls, including upgrades for Comcast and Netflix, and downgrades for Nokia and Zillow.
Advisory Board stock rises 13% after Elliott Management's Paul Singer launches an activist campaign at the health care technology and consulting company.
Here are Monday's top research calls, including downgrades for Coty and NetApp, and upgrades for Tupperware and Ensco.
Trade-Ideas LLC identified Advisory Board (ABCO) as a "dead cat bounce" (down big yesterday but up big today) candidate