On The Fly: Top five analyst downgrades

Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. AbbVie (ABBV) downgraded to Buy from Conviction Buy at Goldman Sachs with analyst Jami Rubin citing share outperformance. 2. Petrobras (PBR) downgraded to Equal Weight from Overweight at Morgan Stanley, to Neutral from Outperform at Credit Suisse, to Neutral from Buy at BofA/Merrill, and to Market Perform from Outperform at Itau BBA. 3. Karyopharm (KPTI) downgraded to Neutral from Outperform at Wedbush with analyst David Nierengarten citing valuation. 4. Vermillion (VRML) downgraded to Hold from Buy at Canaccord. 5. Generac (GNRC) downgraded to Neutral from Outperform at Baird. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.