Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. WW (WTW) downgraded to Underweight from Neutral at JPMorgan with analyst Christina Brathwaite saying channel checks indicate that WW app daily active users continue to contract in the most important period of the year. 2. Papa John's (PZZA) downgraded to Sell from Hold at Stifel with analyst Chris O'Cull saying he sees further downside to earnings estimates and believes the current valuation reflects an expectation for a "faster than likely" recovery of EBITDA and cash flows. 3. Windstream (WIN) downgraded to Market Perform from Outperform at Cowen and Raymond James. 4. Fiat Chrysler (FCAU) downgraded to Neutral from Buy at UBS with analyst Patrick Hummel saying his prior rating was predicated on expectations for best-in-class EBIT growth in 2019. 5. CSX (CSX) downgraded to Sector Perform from Outperform at RBC Capital with analyst Walter Spracklin saying while Precision Scheduled Railroad model implementation has led to a significant reduction in the company's operating ratio, the "low hanging fruit has been picked" and that any further improvement should be "incremental." This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.