Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. PBF Energy (PBF) downgraded to Sell from Neutral at Goldman Sachs with analyst Neil Mehta saying while the company's Q4 results came in ahead of expectations, he is concerned about PBF's lack of free cash flow generation power through the cycle. 2. Kontoor Brands (KTB) downgraded to Hold from Buy at Stifel with analyst Jim Duffy saying the coronavirus will weigh on Lee brand sales in China and impede the planned Q1 Wrangler China launch. 3. Walker & Dunlop (WD) downgraded to Market Perform from Outperform at JMP Securities with analyst Steven Delaney saying the rating change is not a reflection of the company's past or expected performance, but after a 15.3% run-up in the stock price since its Q4 earnings beat and dividend hike earlier this month, he sees shares as "fairly valued." 4. American Eagle (AEO) downgraded to Market Perform from Outperform at Cowen with analyst Oliver Chen saying he sees downside risk to the company's sales, traffic, and promotions. 5. Emerson (EMR) downgraded to Sector Perform from Outperform at RBC Capital with analyst Deane Dray saying the discussion at the company's analyst meeting last week "postpones" his bull case calling for a breakup, with Emerson now entering a "cost reset" mode that focuses more on restructuring than growth strategy. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.