Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Mattel (MAT) downgraded to Neutral from Buy at UBS with analyst Arpine Kocharyan citing the stock's recent 35% appreciation with little change in fundamentals. 2. F5 Networks (FFIV) downgraded to Neutral from Buy at Citi with analyst Jim Suva saying with the stock up 38% year-to-date, the company's price-to-earnings valuation multiple has increased from 14.8 times at the start of the year to 17.8 times. 3. Dr Pepper Snapple (DPS) downgraded to Hold from Buy at Stifel with analyst Mark Swartzberg saying the more he learns about Keurig Green Mountain, the more he is convinced it has "limited capacity for operating income growth." 4. Red Hat (RHT) downgraded to Market Perform from Outperform at Raymond James with analyst Michael Turits saying shares are at peak valuation and the company is facing a difficult NTM growth outlook. 5. AT&T (T) downgraded to a Neutral after resuming coverage from Overweight at JPMorgan with analyst Philip Cusick saying he believes reversal of the Time Warner acquisition by the Department of Justice is "very unlikely" and would not be surprised to see AT&T shares "rebound fairly quickly after a period of deal-related flowback." 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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