Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Freeport McMoRan (FCX) downgraded to Underperform from Sector Perform at RBC Capital with analyst Stephen Walker saying he points to the company's premium valuation ahead of what he expects to be a decline in 2019 production. 2. Zillow (Z, ZG) downgraded to Sell from Hold at Zelman and to Negative from Neutral at Susquehanna. 3. Mindbody (MB) downgraded to Neutral from Buy at UBS and Roth Capital as well as to Neutral from Overweight at JPMorgan. 4. Frontier Communications (FTR) downgraded to Sell from Neutral at UBS with analyst Batya Levi saying Frontier's free cash flow remains under pressure. 5. Audentes downgraded to Market Perform from Outperform at William Blair with analyst Raju Prasad saying increased competition in Pompe disease is giving him pause. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

Jefferies raised the firm's price target on Zillow to $77 from $75 and keeps a Buy rating on the shares. The firm expects upside in Q1, though higher mortgage rates and softer housing data exiting the quarter could encourage Zillow to guide Q2 conservatively. Still, the firm sees tailwinds from new products driving upside to consensus in the coming years, the analyst added in a preview note for the U.S. Internet group.

Guggenheim initiated coverage of Boundless Bio with a Buy rating and $24 price target.