Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Boeing (BA) downgraded to Market Perform from Outperform at Cowen with analyst Cai von Rumohr saying while Dave Calhoun is good choice to lead the company, additional costs from the MAX production suspension and certification delays will hold Boeing's free cash flow to $15 per share in 2020 and $26 in 2021 with a "flattish" 2022. 2. STMicroelectronics (STM) downgraded to Neutral from Buy at Goldman Sachs with analyst Alexander Duval saying since STMicroelectronics was added to the firm's Buy List in August of last year, shares are up by 53%, and it is now being downgraded following its outperformance with its thesis being largely played out. 3. FireEye (FEYE) downgraded to Neutral from Buy at BofA with analyst Tal Liani saying FireEye's stock has been range-bound between $10 and $20 for the past four years due to a slow turnaround process and legacy components hurting growth reacceleration, adding that he sees the potential for this scenario to continue. 4. Castlight Health (CSLT) downgraded to Underweight from Equal Weight at Wells Fargo with analyst Jamie Stockton saying the loss of Walmart (WMT) as a flagship customer and continued churn within the Jiff customer base drove organic growth from 14% in 2018 to negative 9% in 2019. 5. Waters (WAT) downgraded to Underperform from Hold at Needham with analyst Stephen Unger saying a series of end-of-the quarter channel checks revealed continued weakness in demand for LC instruments within the pharmaceutical end-market in Q4 and an expectation of continued sluggish demand in 2020. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

What has Wall Street been buzzing about this week? Here are the top 5 Bu-y calls and the top 5 Sell calls made by Wall Street’s best analysts during the week of April 15-19. Find all top-rated... To see the rest of the story go to thefly.com. See Story Here

Get caught up quickly on the top news and calls moving stocks with these five Top Five lists. 1... To see the rest of the story go to thefly.com. See Story Here

Get caught up quickly on the top news and calls moving stocks with these five Top Five lists. 1... To see the rest of the story go to thefly.com. See Story Here

Says without approximately $200M impact Boeing (BA) 737 MAX 9 from grounding, United (UAL) would have reported a quarterly profit.

Northcoast downgraded Boeing to Sell from Neutral with a $140 price target. The stock in premarket trading is down 1% to $168.80. The analyst expects Boeing's quarterly earnings report in two weeks to prompt concerns about the company's underlying fundamentals and ultimately shift investor focus to liquidity and acquisition concerns. Negative expectations are embedded in the lower share price, but investors may not be discounting structural issues, such as Boeing's balance sheet stability or future cash liabilities, the analyst tells investors in a research note. Northcoast believes the 787 production challenges and the Federal Aviation Administration investigation uncertainties do not appear to be reflected in consensus estimates. The firm's channel checks confirm unexpected changes were already made to the Dreamliner production schedule "that would normally indicate some type of problem not yet been communicated to The Street." Its survey results point to a 787 program build rate of two jets per month, as opposed to Boeing's claim of five.

Northcoast analyst Chris Olin downgraded Boeing to Sell from Neutral with a $140 price target.