Catch up on today's top five analyst downgrades with this list compiled by The Fly: 1. Boston Beer (SAM) downgraded to Underperform from Hold at Jefferies with analyst Kevin Grundy saying his consumer survey and web scrapes point to the potential for greater competitive intensity in the "rapidly growing" spiked seltzer category. He views Boston Beer's valuation as "stretched" given its competitive risk in hard seltzers. 2. Spirit Airlines (SAVE) downgraded to Outperform from Strong Buy at Raymond James with analyst Savanthi Syth now expecting a delay in the inflection of sentiment to early 2020. 3. AstraZeneca (AZN) downgraded to Sell from Hold at DZ Bank. 4. Heico (HEI) downgraded to Sell from Neutral at UBS with analyst Louis Raffetto citing valuation. 5. Hilton (HLT) downgraded to Neutral from Outperform at Macquarie with analyst Chad Beynon saying he believes the stock's current valuation with near-peak EBITDA multiples prices in the positives while the company faces a lack of catalysts. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.