Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Petrobras (PBR) downgraded to Sell at Deutsche Bank by analyst Alexander Burgansky, who said he sees no upside for the equity with negative net income likely in both 2016 and 2017. 2. Lannett (LCI) downgraded to Sell at Canaccord after the company cut its guidance to below consensus expectations. 3. Cognex (CGNX) downgraded to Underperform at CLSA by analyst Jeremie Capron, who said Apple's (AAPL) new iPhone SE is essentially a refreshed iPhone 5S, which will likely be made with older equipment and raises the risk that Cognex will not meet lofty consensus expectations. Capron sees increased earnings risk for the rest of the year given the weaker manufacturing capex environment and developments at Apple and views risk/reward as unfavorable following the recent strength. 4. EndoChoice (GI) downgraded to Underperform at BofA/Merrill due to expectations that low margin microcaps will not outperform enough to compensate for the relative risk taken. 5. General Dynamics (GD) downgraded to Hold at Deutsche Bank by analyst Myles Walton, who said Gulfstream G650 inventory and price trends are "quickly becoming a problem." Walton added that the available for sale G650s moved from 9 to 22 over the last five months. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage,
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