Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Facebook (FB) downgraded to Neutral from Buy at BTIG with analyst Rich Greenfield saying he acknowledges Facebook remains one of the only ways to play the shift of legacy media ad dollars to mobile, but also cautions that investor expectations have risen "dramatically" over the past year, leaving the bar set "simply too high." 2. Twitter (TWTR) downgraded to Market Perform from Outperform at Raymond James with analyst Aaron Kessler saying the risk/reward is more balanced with the shares near $19. 3. E-Trade (ETFC) downgraded to Neutral from Buy at Goldman with analyst Conor Fitzgerald saying the company's decision to grow above the $50B asset threshold increases regulatory risks over capital returns while only modestly provide earnings accretion. 4. Nielsen (NLSN) downgraded to Market Perform from Outperform at BMO Capital with the firm citing valuation. 5. Statoil (STO) downgraded to Equal Weight from Overweight at Morgan Stanley. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, Reference Link