Benzinga's Top Upgrades

Analysts at JPMorgan upgraded Zynga Inc

from “neutral” to “overweight.” ZNGA's shares closed at $9.42 yesterday. Zynga's trailing-twelve-month revenue is $1.14 billion. Analysts at SunTrust upgraded Whiting Petroleum Corp

from “neutral” to “buy.” WLL's stock closed at $56.11 yesterday. Whiting Petroleum's trailing-twelve-month operating margin is 43.61%. Analysts at Citigroup upgraded Celanese Corporation

from “neutral” to “buy.” CE's shares closed at $48.40 yesterday. Celanese's PEG ratio is 0.85. Nomura upgraded Amazon.com Inc

from “neutral” to “buy.” AMZN's shares closed at $195.99 yesterday. Amazon.com's trailing-twelve-month revenue is $48.08 billion.