Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Buffalo Wild Wings (BWLD) downgraded to Underperform from Neutral at Longbow. 2. AK Steel (AKS) downgraded to Underweight from Sector Weight at KeyBanc with analyst Philip Gibbs saying he's incrementally cautious on U.S. carbon sheet market outlook due to slowing demand and fourth quarter supply risks. 3. SunEdison Semiconductor (SEMI) downgraded to Hold from Buy at Deutsche Bank and to Market Perform at Wells Fargo. 4. Juniper Pharma (JNP) downgraded to Market Perform from Outperform at Northland and to Neutral from Buy at H.C. Wainwright. 5. Cardtronics (CATM) downgraded to Neutral from Overweight at JPMorgan with analyst Reginald Smith citing valuation with the stock up 38% year-to-date. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.