Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Garmin (GRMN) downgraded to Neutral from Buy at Longbow with analyst Nikolay Todorov saying its upside potential is limited by valuation following a 17% rally in the stock price yesterday. 2. Biogen (BIIB) downgraded to Hold from Buy at Stifel with analyst Paul Matteis saying the stock has been "remarkably resilient" in the wake of two recent events - Roche's (RHHBY) crenezumab futility and Tecfidera's inter partes review institution. However, both these events "imply elevated risk to the long-term bull case." 3. Faro Technologies (FARO) downgraded to Hold from Buy at Craig-Hallum with analyst Greg Palm citing increasing risks to the company's near term growth and margin targets. 4. D.R. Horton (DHI) and Lennar (LEN) downgraded to Neutral from Outperform at Wedbush. 5. General Mills (GIS) downgraded to Hold from Buy at Standpoint Research. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.