Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. John Bean Technologies (JBT) downgraded to Neutral from Outperform at Baird with analyst Mig Dobre citing valuation. 2. Lululemon (lulu) downgraded to Hold from Buy at Needham with analyst Rick Patel citing valuation and less room for upside given the rising earnings expectations. 3. Petrobras (PBR) downgraded to Underperform from Market Perform at Raymond James with analyst Pavel Molchanov saying shares have recovered back to mid-2014 levels and believes gains will be hard to without an acceleration in growth. 4. HubSpot (HUBS) downgraded to Sector Perform from Outperform at RBC Capital with analyst Ross MacMillan saying he expects the cycle of earnings beats and FY18-guidance raises to continue but at a more moderate pace, citing "lapping comps" within the product cycle, slower growth in the Americas segment, rising competition from Salesforce (CRM) Essentials, the impact of General Data Protection Regulation legislation in the E.U. and above-average valuation. 5. Volaris (VLRS) downgraded to Equal Weight from Overweight at Barclays and to In-Line from Outperform at Imperial 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.