Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Macerich (MAC) downgraded to Sector Weight from Overweight at KeyBanc. 2. Eventbrite (EB) downgraded to Hold from Buy at Stifel with analyst Scott Devitt citing valuation. 3. HSBC (HSBC) downgraded to Sell from Hold at Edward Jones. 4. Noble Corp (NE) and Ensco (ESV) were downgraded to Hold from Buy at Societe Generale. 5. Greif (GEF) downgraded to Underperform from Outperform at BMO Capital. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.