Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Public Storage (PSA) downgraded to Underweight from Equal Weight at Barclays with analyst Ross Smotrich citing valuation combined with a weaker growth outlook for self-storage amid elevated levels of new supply nationally for the downgrade. 2. Criteo (CRTO) downgraded to Sector Weight from Overweight at KeyBanc and to Hold from Buy at SunTrust. 3. Tier REIT (TIER) downgraded to Neutral from Outperform at Baird with analyst David Rodgers saying he is "positive" on the merger with Cousins Properties (CUZ) given the recognition of value in Tier's current development pipeline as well as expected synergies. 4. Pointer Telocation (PNTR) downgraded to Neutral from Buy at H.C. Wainwright with analyst Amit Dayal citing its acquisition by I.D. Systems (IDSY). 5. Cheetah Mobile (CMCM) downgraded to Neutral from Buy at Nomura Instinet with analyst Carson Lo saying as a result of the negative publicity accusing Cheetah of engaging in fraudulent click injection, some overseas partners of Cheetah have suspended their businesses with the company. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.