Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Qualcomm (QCOM) downgraded to Market Perform from Outperform at Northland with analyst Tom Sepenzis citing the previous guidance change due to the dispute with Apple (AAPL) and its suppliers. The analyst is uncertain Qualcomm's model will survive multiple attacks from regulators and now Apple, and said the longer the fight with Apple goes on the more the negative impact on shares will be. 2. Alder Biopharmaceuticals (ALDR) downgraded to Neutral from Outperform at Credit Suisse with analyst Vamil Divan citing the release of data from the PROMISE-1 trial of eptinezumab in frequent migraine treatment. Divan lowered his price target on Alder shares to $17 from $30. 3. Advance Auto Parts (AAP) downgraded to Neutral from Buy at Cleveland Research with the firm saying checks indicate that second quarter comparables are likely running below consensus as industry weakness pressures sales trends. 4. Brookfield Renewable (BEP) downgraded to Neutral from Outperform at Macquarie with analyst David Noseworthy citing expectations that growth in the U.S. will slow after the closing of the TerraForm Power (TERP) and TerraForm Global (GLBL) acquisitions, risk from increasing exposure to developing market, and premium valuation. 5. First Data (FDC) downgraded to Equal Weight from Overweight at Morgan Stanley with analyst James Faucette saying the turnaround in fundamentals is largely reflected in shares and deleveraging potential is less likely to be a driver going forward. 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 22-26. Find all top-rated... To see the rest of the story go to thefly.com. See Story Here