Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Square (SQ) downgraded to Neutral from Positive at Susquehanna analyst James Friedman citing valuation and the lack of a CFO at the company. 2. Landstar System (LSTR) downgraded to Neutral from Buy at Goldman Sachs and to Sector Weight from Overweight at KeyBanc. 3. Dean Foods (DF) downgraded to Hold from Buy at Jefferies with analyst Akshay Jagdale saying he believes the company's cost savings opportunity is significant enough to more than offset secular headwinds. 4. Ctrip (CTRP) downgraded to Neutral from Outperform at Credit Suisse, to Neutral from Buy at Citi, to Underperform from Outperform at CLSA, and to Hold from Buy at China Renaissance. 5. CDK Global (CDK) downgraded to Market Perform from Outperform at Wells Fargo with analyst Timothy Willi saying he believes that CDK faces a variety of headwinds during FY19 that will likely limit upside in the shares despite the discounted valuation. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.