Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. AMD (AMD) downgraded to Underperform from Market Perform at Bernstein with the firm saying it thinks that the company's second quarter results could miss expectations. 2. Transocean (RIG) downgraded to Sell from Hold at Canaccord with analyst Alex Brooks saying the current valuation is not sustainable following management's decision this week to launch a $1.5B junk bond issue. 3. Citi (C) downgraded to Market Perform from Outperform at Wells Fargo with analyst Matthew Burnell citing weaker expectations for growth in emerging economies. 4. Phillips 66 (PSX) downgraded to Market Perform from Outperform at Wells Fargo with analyst Roger Read citing the stock's relative outperformance and a "shakier outlook" for the company's refining operations. 5. Humana (HUM) downgraded to Neutral from Overweight at JPMorgan with analyst Gary Taylor saying he sees a "much lower" than 50/50 probability of the acquisition by Aetna (AET) getting approved. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage,
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