Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Flir Systems (FLIR) downgraded to Hold from Buy at SunTrust and to Neutral from Outperform at Baird. 2. Whiting Petroleum (WLL) downgraded to Hold from Buy at Stifel with analyst Michael Scialla saying he is waiting for Whiting to find a solution to refinance its 2021 debt maturity obligation, which was $774M at the end of 2019. 3. Big Lots (BIG) downgraded to Underweight from Neutral at JPMorgan with analyst Matthew Boss saying he sees "material risk" to second half of 2020 estimates after the company missed expectations in Q4. 4. Teladoc (TDOC) downgraded to Sector Weight from Overweight at KeyBanc with analyst Donald Hooker citing valuation. 5. Nielsen (NLSN) downgraded to Neutral from Outperform at Baird with analyst Jeffrey Meuler saying the company's 2020 guidance implies continued Audience Measurement deceleration, minimal overall growth with flat to down margins, and continued weak free cash flow conversion. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.