Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Facebook (FB) downgraded to Sell from Hold at Pivotal Research with analyst Michael Levine saying as much as investors have usually downplayed Facebook's financial guidance as "perennial sandbagging," it certainly was not in the U.S. in Q4. 2. WWE (WWE) downgraded to Neutral from Overweight at JPMorgan with analyst David Karnovsky saying the company's management change, new 2020 outlook, and potential network deals have reset the story for shares, which are down nearly 30% in two weeks. 3. GenMark (GNMK) downgraded to Market Perform from Outperform at Raymond James with analyst John Hsu citing "mixed" preliminary Q4 results, including a revenue miss. 4. CoreSite Realty (COR) downgraded to Underperform from Neutral at BofA with analyst Michael Funk saying he believes that the REIT's "premium" valuation is unwarranted given its "persistently low FFO growth and uncertainty related to elevated customer churn." 5. Fortive (FTV) downgraded to Market Perform from Outperform at Raymond James with analyst Brian Gesuale saying he believes shares are in better hands of arbitrageurs than fundamental investors at this point. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage,
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