Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Snap (SNAP) upgraded to Equal Weight from Underweight at Morgan Stanley with analyst Brian Nowak saying he acknowledges that in the year-to-date he has underestimated Snap's stronger execution and ability to drive growth. 2. Charter (CHTR) upgraded to Overweight from Sector Weight at KeyBanc with analyst Brandon Nispel saying he believes Charter remains well positioned to benefit from increased penetration rates in broadband, higher download speed take rates to drive broadband prices higher, and an overall mix shift to higher-margin "Growth Business." 3. Boston Beer (SAM) upgraded to Neutral from Sell at UBS with analyst Sean King saying he has greater confidence in the company's fiscal 2020 sales growth story "flowing through to earnings growth." 4. Hub Group (HUBG) upgraded to Overweight from Neutral at JPMorgan. 5. Tandem Diabetes (TNDM) upgraded to Buy at UBS with 33% upside potential with analyst Matthew Taylor saying while he understands concerns about slowing growth on tough comps, he sees "several sources of growth" that should allow Tandem to deliver upside to consensus in 2020 and beyond. This list is just a portion of The Fly's full analyst coverage. To see The Fly's full Street Research coverage, click here.

Deutsche Bank lowered the firm's price target on Charter Communications to $320 from $375 and keeps a Hold rating on the shares. The firm cites lower free cash flow estimates for the target drop. The 34% year-to-date decline in Charter's stock price arguably prices in a more challenged growth outlook, the analyst tells investors in a research note. However, the firm does not expect a recovery in the shares until the impact from the Affordable Connectivity Program sunsetting is known and there is some visibility into sustained positive broadband subscriber growth coming back into the model.

Citi lowered the firm's price target on Boston Beer to $315 from $350 and keeps a Neutral rating on the shares as part of a Q1 earnings preview for the beverages and household and personal care group. The firm sees another quarter of gross margin upside but believes the market will not reward earnings beats on margins without solid sales and volume trends.