Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. F5 Networks (FFIV) double-downgraded to Underperform from Buy at BofA/Merrill with analyst Tal Liani warning about pressure on the company's revenue growth amid a "secular shift in demand from appliance-based Application Delivery Controllers to software and cloud-based solutions," which has weighed on pricing and also brought in competition from VMware (VMW), Amazon (AMZN), Google (GOOG) along with content delivery network providers like Akamai (AKAM). 2. Waters (WAT) downgraded to Neutral from Buy at BTIG with analyst Sun Ji Nam citing the 19% year-to-date run-up in the stock price and her lacking conviction on why the shares should trade at a premium relative to their peer group. 3. Etsy (ETSY) downgraded to Underweight from Equal Weight at Morgan Stanley with analyst Lauren Cassel saying her analysis indicates that headwinds from new state sales tax legislation and Etsy pulling back on its investment in Product Listing Ads could more than offset the benefits of free shipping. 4. At Home Group (HOME) downgraded to Market Perform from Outperform at William Blair with analyst Daniel Hofkin citing "limited visibility" following the company's guidance cut. 5. Discover (DFS) and Synchrony (SYF) were downgraded to Neutral from Buy at Nomura Instinet. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.