Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Depomed (DEPO) downgraded to Neutral from Buy at Mizuho, as analyst Irina Koffler said her conviction in a takeout has diminished. Koffler said without a deal there is also potential for management turnover due to activist involvement, which could lead to a decline in shares... 2. Aviragen (AVIR) downgraded to Neutral from Buy at Ladenburg by analyst Kevin DeGeeter after vapendavir failed to demonstrate an improvement in asthma symptoms. The analyst expects the company to discontinue development of vapendavir in asthmatics and re-evaluate plans for a Phase IIb study in hematopoietic stem cell transplant recipients... 3. Taylor Morrison (TMHC) downgraded to Market Perform from Outperform at FBR Capital, with Alex Rygiel citing valuation... 4. Hibbett Sports (HIBB) downgraded to Equal Weight from Overweight at Stephens, to Hold from Buy at SunTrust, and to Neutral from Positive at Susquehanna following a Q4 preannouncement that missed expectations and disappointing guidance... 5. Popeyes (PLKI) downgraded to Neutral from Buy at Sidoti. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.