Catch up on today's top five analyst upgrades with this list compiled by The Fly: 1. Snap (SNAP) upgraded to Neutral from Sell at Citi with analyst Mark May saying Snap is down 70% since February 2018 and its current valuation is below Twitter (TWTR) and Facebook's (FB) current and four-year average multiple. 2. Northrop Grumman (NOC) upgraded to Outperform from Neutral at Credit Suisse with analyst Robert Spingarn saying the market was not kind to Northrop Grumman in 2018, with the stock trading down about 21% for the year and about 32% off its high in April. 3. Alcoa (AA) and Teck Resources (TECK) were upgraded to Buy from Neutral at Goldman Sachs. 4. Sherwin-Williams (SHW) upgraded to Outperform from Market Perform at Wells Fargo with analyst Stephen East saying with the equity now trading at an 18.0 times PE multiple and the company growing 2019 EPS an estimated 17%-plus year over year, East believes investors appreciate the potential risks, but might not be appreciating the potential upside. 5. Emerson (EMR) upgraded to Neutral from Sell at Citi with analyst Andrew Kaplowtiz saying he continues to expect slowing growth before larger project activity begins to contribute. 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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